truninger hydraulic pump pricelist

Parker"s Hydraulic Pump and Power Systems Division provides a broad selection of piston pumps, hydraulic motors and power units that help our customers meet their industrial and mobile application needs. Our division is the result of the Parker piston pump business’s acquisition of Denison Hydraulics and merger with the Parker Oildyne Division. Reach higher hydraulic working pressures, get better reliability, higher efficiencies, and achieve lower operating costs and improved productivity on your heavy-duty equipment with Parker’s line of piston pumps and vane pumps, electro-hydraulic actuators, hydraulic motors and power units, piston motors and hydrostatic transmissions.

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 3/32 1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 4/32 8 Fluid cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 9 Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10.1 Bolt-on valves - SAE 3000 pattern . . . . . . . . . . . ....

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 5/32 1 General 1.1 Product description The QX pumps are the 5th generation of Bucher internal gear pumps, which have proven themselves in thirty years of service around the world. Numerous improvements have been made to the straightforward and robust design. Advances in the manufacturing process have made it possible without making higher demands on individual components to build pumps that are considerably lighter and more compact. A new tooth profile, conceived and optimised with the help of CAE, has yielded another significant reduction in...

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 11/32 4.2 Pressure range 1 L I K E S N G D V O P T C A F B Z Z X Y 1 3 P S 2 1 external drain port - see special feature 06 2 Special model: 4-hole flange ISO 3019/2 3 Depending on operating conditions, a second suction port may be required on QX61 (SAE 2") and QX81 (SAE 2 1/2") - see section 2.2.1 4.3 Pressure range 2 L I K M E S N P G D V O T A C F B Z Z X Y 1 S P 2 1 external drain port - see special feature 06 2 Special model: 4-hole flange ISO 3019/2

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 12/32 4.4 Pressure range 3 I L K M E S T N G D V O C A Z Z B F P X Y P 2 1 S 1 external drain port - see special feature 06 2 Special model: 4-hole flange ISO 3019/2 4.5 Ordering code for single pumps Series = QX Frame size = 2 / 3 / 4 / 5 / 6 / 8 Pressure range = 1 / 2 / 3 Displacement in cm3/rev = 005 - 500 Rotation right (CW) = R (viewed from shaft end) left (CCW) = L Q X 5 3 - 0 4 0 R * * Variants / special features (to be inserted by the factory, see section 4.7 for a selection) Ordering example: Required: single pump Displacement: 40...

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 13/32 5 Double pumps QX double pumps consist of two single pumps mounted on a common drive shaft. Hydraulically, the two pumps operate independently of one another but they share a common suction port in the pump’s centre section. The larger pump of the combination is situated at the shaft end (the drive side) and is referred to as Pump I. With equal frame sizes, the pump with the larger displacement is situated at the drive side. Double pumps can be combined as shown in the following table. If a letter is shown at the intersection point of the...

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 23/32 5.3 Ordering code for double pumps Q X 6 3 0 8 0 / 3 1 - 0 2 0 R * * Series = QX Frame size = 2 / 3 / 4 / 5 / 6 / 8 Pressure range = 1 / 2 / 3 Displacement in cm3/rev = 005 - 500 Frame size = 2 / 3 / 4 / 5 / 6 / 8 Pressure range = 1 / 2 / 3 Displacement in cm3/rev = 005 - 500 Rotation right (CW) = R (viewed from shaft end) left (CCW)= L Variants / special features (to be inserted by the factory, see section 4.7 for a selection) - Ordering example: Required: double pump Pump 1 Displacement: 80 cm3/rev Continuous pressure: 300 bar Type:...

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 25/32 6.2 Ordering code for triple pumps Triple pumps can only be supplied after consultation with the factory. Q X 5 1 - 1 2 5 / 5 1 0 1 2 R * * Series = QX Frame size = 2 / 3 / 4 / 5 / 6 / 8 Pressure range = 1 / 2 / 3 Frame size = 2 / 3 / 4 / 5 / 6 / 8 Pressure range = 1 / 2 / 3 Variants / special features (to be inserted by the factory, see section 4.7 for a selection) - 0 8 0 / 2 1 - Frame size = 2 / 3 / 4 / 5 / 6 / 8 Pressure range = 1 / 2 / 3 Rotation right (CW) = R (viewed from shaft end) left (CCW) = L Displacement in cm3/rev = 005 -...

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 26/32 7 Low-flow capability pumps 7.1 Generals The QX24 internal gear pump is a further development of the Bucher internal gear pump, which has proven itself in more than 30 years of service around the world. With displacements from 3,3 to 5,1 cm3/rev, it extends the low-flow capability of the QX range. 7.2 Technical date Mounting attitude unrestricted Mounting method (standard) oval 2-hole flange to ISO 3019/2 (metric) Direction of rotation right, alternatively left (but not reversible) Pump drive method in-line, by flexible coupling Fluids...

100-P-000021-E-08/ 02.09 Internal Gear Pump QX 28/32 7.5.2 Ordering codes Series = QX Size = 2 Pressure range = 4 Displacement in cm3/rev = 003, 004 and 005 Direction of rotation right (CW) = R (viewed from shaft end) left (CCW) = L Q X 2 4 - 0 0 4 R * * Variants / special features (to be inserted by the factory, see section 7.5.4 for a selection) 7.5.3 Standard configuration direction of rotation right " 2- hole mounting flange to ISO 3019/2 (metric) Nitrile seals cylindrical shaft end to ISO R775 separate drain port G 1/4 in rear cover of the pump 7.5.4 Special features 09 = Viton seals...

What are the main products of TIMEWAY ? GEAR PUMP: CBN Series, NT Series, CB-B Series, CBK Series, GPY Series, HGP Series, CBF Series, CBW Series PISTON PUMP:CY Series, A10VSO Series, A2F Series, HY Series, A2FO Series, A2FM Series, A4VG Series, V Series VANE PUMP: VQ Series, VP Series, VCM Series, PV2R Series PUMP SPARE PARTS for Caterpillar, Rexroth, Kawasaki, Komatsu, Linde, Sauer Sundstrand, Eaton, Parker/Denison hydraulic piston pump, hydraulic vane pump or hydraulic motor in China.

Hydraulic pumps are mechanisms in hydraulic systems that move hydraulic fluid from point to point initiating the production of hydraulic power. Hydraulic pumps are sometimes incorrectly referred to as “hydrolic” pumps.

They are an important device overall in the hydraulics field, a special kind of power transmission which controls the energy which moving fluids transmit while under pressure and change into mechanical energy. Other kinds of pumps utilized to transmit hydraulic fluids could also be referred to as hydraulic pumps. There is a wide range of contexts in which hydraulic systems are applied, hence they are very important in many commercial, industrial, and consumer utilities.

“Power transmission” alludes to the complete procedure of technologically changing energy into a beneficial form for practical applications. Mechanical power, electrical power, and fluid power are the three major branches that make up the power transmission field. Fluid power covers the usage of moving gas and moving fluids for the transmission of power. Hydraulics are then considered as a sub category of fluid power that focuses on fluid use in opposition to gas use. The other fluid power field is known as pneumatics and it’s focused on the storage and release of energy with compressed gas.

"Pascal"s Law" applies to confined liquids. Thus, in order for liquids to act hydraulically, they must be contained within a system. A hydraulic power pack or hydraulic power unit is a confined mechanical system that utilizes liquid hydraulically. Despite the fact that specific operating systems vary, all hydraulic power units share the same basic components. A reservoir, valves, a piping/tubing system, a pump, and actuators are examples of these components. Similarly, despite their versatility and adaptability, these mechanisms work together in related operating processes at the heart of all hydraulic power packs.

The hydraulic reservoir"s function is to hold a volume of liquid, transfer heat from the system, permit solid pollutants to settle, and aid in releasing moisture and air from the liquid.

Mechanical energy is changed to hydraulic energy by the hydraulic pump. This is accomplished through the movement of liquid, which serves as the transmission medium. All hydraulic pumps operate on the same basic principle of dispensing fluid volume against a resistive load or pressure.

Hydraulic valves are utilized to start, stop, and direct liquid flow in a system. Hydraulic valves are made of spools or poppets and can be actuated hydraulically, pneumatically, manually, electrically, or mechanically.

The end result of Pascal"s law is hydraulic actuators. This is the point at which hydraulic energy is transformed back to mechanical energy. This can be accomplished by using a hydraulic cylinder to transform hydraulic energy into linear movement and work or a hydraulic motor to transform hydraulic energy into rotational motion and work. Hydraulic motors and hydraulic cylinders, like hydraulic pumps, have various subtypes, each meant for specific design use.

The essence of hydraulics can be found in a fundamental physical fact: fluids are incompressible. (As a result, fluids more closely resemble solids than compressible gasses) The incompressible essence of fluid allows it to transfer force and speed very efficiently. This fact is summed up by a variant of "Pascal"s Principle," which states that virtually all pressure enforced on any part of a fluid is transferred to every other part of the fluid. This scientific principle states, in other words, that pressure applied to a fluid transmits equally in all directions.

Furthermore, the force transferred through a fluid has the ability to multiply as it moves. In a slightly more abstract sense, because fluids are incompressible, pressurized fluids should keep a consistent pressure just as they move. Pressure is defined mathematically as a force acting per particular area unit (P = F/A). A simplified version of this equation shows that force is the product of area and pressure (F = P x A). Thus, by varying the size or area of various parts inside a hydraulic system, the force acting inside the pump can be adjusted accordingly (to either greater or lesser). The need for pressure to remain constant is what causes force and area to mirror each other (on the basis of either shrinking or growing). A hydraulic system with a piston five times larger than a second piston can demonstrate this force-area relationship. When a force (e.g., 50lbs) is exerted on the smaller piston, it is multiplied by five (e.g., 250 lbs) and transmitted to the larger piston via the hydraulic system.

Hydraulics is built on fluids’ chemical properties and the physical relationship between pressure, area, and force. Overall, hydraulic applications allow human operators to generate and exert immense mechanical force with little to no physical effort. Within hydraulic systems, both oil and water are used to transmit power. The use of oil, on the other hand, is far more common, owing in part to its extremely incompressible nature.

Pressure relief valves prevent excess pressure by regulating the actuators’ output and redirecting liquid back to the reservoir when necessary. Directional control valves are used to change the size and direction of hydraulic fluid flow.

While hydraulic power transmission is remarkably useful in a wide range of professional applications, relying solely on one type of power transmission is generally unwise. On the contrary, the most efficient strategy is to combine a wide range of power transmissions (pneumatic, hydraulic, mechanical, and electrical). As a result, hydraulic systems must be carefully embedded into an overall power transmission strategy for the specific commercial application. It is necessary to invest in locating trustworthy and skilled hydraulic manufacturers/suppliers who can aid in the development and implementation of an overall hydraulic strategy.

The intended use of a hydraulic pump must be considered when selecting a specific type. This is significant because some pumps may only perform one function, whereas others allow for greater flexibility.

The pump"s material composition must also be considered in the application context. The cylinders, pistons, and gears are frequently made of long-lasting materials like aluminum, stainless steel, or steel that can withstand the continuous wear of repeated pumping. The materials must be able to withstand not only the process but also the hydraulic fluids. Composite fluids frequently contain oils, polyalkylene glycols, esters, butanol, and corrosion inhibitors (though water is used in some instances). The operating temperature, flash point, and viscosity of these fluids differ.

In addition to material, manufacturers must compare hydraulic pump operating specifications to make sure that intended utilization does not exceed pump abilities. The many variables in hydraulic pump functionality include maximum operating pressure, continuous operating pressure, horsepower, operating speed, power source, pump weight, and maximum fluid flow. Standard measurements like length, rod extension, and diameter should be compared as well. Because hydraulic pumps are used in lifts, cranes, motors, and other heavy machinery, they must meet strict operating specifications.

It is critical to recall that the overall power generated by any hydraulic drive system is influenced by various inefficiencies that must be considered in order to get the most out of the system. The presence of air bubbles within a hydraulic drive, for example, is known for changing the direction of the energy flow inside the system (since energy is wasted on the way to the actuators on bubble compression). Using a hydraulic drive system requires identifying shortfalls and selecting the best parts to mitigate their effects. A hydraulic pump is the "generator" side of a hydraulic system that initiates the hydraulic procedure (as opposed to the "actuator" side that completes the hydraulic procedure). Regardless of disparities, all hydraulic pumps are responsible for displacing liquid volume and transporting it to the actuator(s) from the reservoir via the tubing system. Some form of internal combustion system typically powers pumps.

While the operation of hydraulic pumps is normally the same, these mechanisms can be split into basic categories. There are two types of hydraulic pumps to consider: gear pumps and piston pumps. Radial and axial piston pumps are types of piston pumps. Axial pumps produce linear motion, whereas radial pumps can produce rotary motion. The gear pump category is further subdivided into external gear pumps and internal gear pumps.

Each type of hydraulic pump, regardless of piston or gear, is either double-action or single-action. Single-action pumps can only pull, push, or lift in one direction, while double-action pumps can pull, push, or lift in multiple directions.

Vane pumps are positive displacement pumps that maintain a constant flow rate under varying pressures. It is a pump that self-primes. It is referred to as a "vane pump" because the effect of the vane pressurizes the liquid.

This pump has a variable number of vanes mounted onto a rotor that rotates within the cavity. These vanes may be variable in length and tensioned to maintain contact with the wall while the pump draws power. The pump also features a pressure relief valve, which prevents pressure rise inside the pump from damaging it.

Internal gear pumps and external gear pumps are the two main types of hydraulic gear pumps. Pumps with external gears have two spur gears, the spurs of which are all externally arranged. Internal gear pumps also feature two spur gears, and the spurs of both gears are internally arranged, with one gear spinning around inside the other.

Both types of gear pumps deliver a consistent amount of liquid with each spinning of the gears. Hydraulic gear pumps are popular due to their versatility, effectiveness, and fairly simple design. Furthermore, because they are obtainable in a variety of configurations, they can be used in a wide range of consumer, industrial, and commercial product contexts.

Hydraulic ram pumps are cyclic machines that use water power, also referred to as hydropower, to transport water to a higher level than its original source. This hydraulic pump type is powered solely by the momentum of moving or falling water.

Ram pumps are a common type of hydraulic pump, especially among other types of hydraulic water pumps. Hydraulic ram pumps are utilized to move the water in the waste management, agricultural, sewage, plumbing, manufacturing, and engineering industries, though only about ten percent of the water utilized to run the pump gets to the planned end point.

Despite this disadvantage, using hydropower instead of an external energy source to power this kind of pump makes it a prominent choice in developing countries where the availability of the fuel and electricity required to energize motorized pumps is limited. The use of hydropower also reduces energy consumption for industrial factories and plants significantly. Having only two moving parts is another advantage of the hydraulic ram, making installation fairly simple in areas with free falling or flowing water. The water amount and the rate at which it falls have an important effect on the pump"s success. It is critical to keep this in mind when choosing a location for a pump and a water source. Length, size, diameter, minimum and maximum flow rates, and speed of operation are all important factors to consider.

Hydraulic water pumps are machines that move water from one location to another. Because water pumps are used in so many different applications, there are numerous hydraulic water pump variations.

Water pumps are useful in a variety of situations. Hydraulic pumps can be used to direct water where it is needed in industry, where water is often an ingredient in an industrial process or product. Water pumps are essential in supplying water to people in homes, particularly in rural residences that are not linked to a large sewage circuit. Water pumps are required in commercial settings to transport water to the upper floors of high rise buildings. Hydraulic water pumps in all of these situations could be powered by fuel, electricity, or even by hand, as is the situation with hydraulic hand pumps.

Water pumps in developed economies are typically automated and powered by electricity. Alternative pumping tools are frequently used in developing economies where dependable and cost effective sources of electricity and fuel are scarce. Hydraulic ram pumps, for example, can deliver water to remote locations without the use of electricity or fuel. These pumps rely solely on a moving stream of water’s force and a properly configured number of valves, tubes, and compression chambers.

Electric hydraulic pumps are hydraulic liquid transmission machines that use electricity to operate. They are frequently used to transfer hydraulic liquid from a reservoir to an actuator, like a hydraulic cylinder. These actuation mechanisms are an essential component of a wide range of hydraulic machinery.

There are several different types of hydraulic pumps, but the defining feature of each type is the use of pressurized fluids to accomplish a job. The natural characteristics of water, for example, are harnessed in the particular instance of hydraulic water pumps to transport water from one location to another. Hydraulic gear pumps and hydraulic piston pumps work in the same way to help actuate the motion of a piston in a mechanical system.

Despite the fact that there are numerous varieties of each of these pump mechanisms, all of them are powered by electricity. In such instances, an electric current flows through the motor, which turns impellers or other devices inside the pump system to create pressure differences; these differential pressure levels enable fluids to flow through the pump. Pump systems of this type can be utilized to direct hydraulic liquid to industrial machines such as commercial equipment like elevators or excavators.

Hydraulic hand pumps are fluid transmission machines that utilize the mechanical force generated by a manually operated actuator. A manually operated actuator could be a lever, a toggle, a handle, or any of a variety of other parts. Hydraulic hand pumps are utilized for hydraulic fluid distribution, water pumping, and various other applications.

Hydraulic hand pumps may be utilized for a variety of tasks, including hydraulic liquid direction to circuits in helicopters and other aircraft, instrument calibration, and piston actuation in hydraulic cylinders. Hydraulic hand pumps of this type use manual power to put hydraulic fluids under pressure. They can be utilized to test the pressure in a variety of devices such as hoses, pipes, valves, sprinklers, and heat exchangers systems. Hand pumps are extraordinarily simple to use.

Each hydraulic hand pump has a lever or other actuation handle linked to the pump that, when pulled and pushed, causes the hydraulic liquid in the pump"s system to be depressurized or pressurized. This action, in the instance of a hydraulic machine, provides power to the devices to which the pump is attached. The actuation of a water pump causes the liquid to be pulled from its source and transferred to another location. Hydraulic hand pumps will remain relevant as long as hydraulics are used in the commerce industry, owing to their simplicity and easy usage.

12V hydraulic pumps are hydraulic power devices that operate on 12 volts DC supplied by a battery or motor. These are specially designed processes that, like all hydraulic pumps, are applied in commercial, industrial, and consumer places to convert kinetic energy into beneficial mechanical energy through pressurized viscous liquids. This converted energy is put to use in a variety of industries.

Hydraulic pumps are commonly used to pull, push, and lift heavy loads in motorized and vehicle machines. Hydraulic water pumps may also be powered by 12V batteries and are used to move water out of or into the desired location. These electric hydraulic pumps are common since they run on small batteries, allowing for ease of portability. Such portability is sometimes required in waste removal systems and vehiclies. In addition to portable and compact models, options include variable amp hour productions, rechargeable battery pumps, and variable weights.

While non rechargeable alkaline 12V hydraulic pumps are used, rechargeable ones are much more common because they enable a continuous flow. More considerations include minimum discharge flow, maximum discharge pressure, discharge size, and inlet size. As 12V batteries are able to pump up to 150 feet from the ground, it is imperative to choose the right pump for a given use.

Air hydraulic pumps are hydraulic power devices that use compressed air to stimulate a pump mechanism, generating useful energy from a pressurized liquid. These devices are also known as pneumatic hydraulic pumps and are applied in a variety of industries to assist in the lifting of heavy loads and transportation of materials with minimal initial force.

Air pumps, like all hydraulic pumps, begin with the same components. The hydraulic liquids, which are typically oil or water-based composites, require the use of a reservoir. The fluid is moved from the storage tank to the hydraulic cylinder via hoses or tubes connected to this reservoir. The hydraulic cylinder houses a piston system and two valves. A hydraulic fluid intake valve allows hydraulic liquid to enter and then traps it by closing. The discharge valve is the point at which the high pressure fluid stream is released. Air hydraulic pumps have a linked air cylinder in addition to the hydraulic cylinder enclosing one end of the piston.

The protruding end of the piston is acted upon by a compressed air compressor or air in the cylinder. When the air cylinder is empty, a spring system in the hydraulic cylinder pushes the piston out. This makes a vacuum, which sucks fluid from the reservoir into the hydraulic cylinder. When the air compressor is under pressure, it engages the piston and pushes it deeper into the hydraulic cylinder and compresses the liquids. This pumping action is repeated until the hydraulic cylinder pressure is high enough to forcibly push fluid out through the discharge check valve. In some instances, this is connected to a nozzle and hoses, with the important part being the pressurized stream. Other uses apply the energy of this stream to pull, lift, and push heavy loads.

Hydraulic piston pumps transfer hydraulic liquids through a cylinder using plunger-like equipment to successfully raise the pressure for a machine, enabling it to pull, lift, and push heavy loads. This type of hydraulic pump is the power source for heavy-duty machines like excavators, backhoes, loaders, diggers, and cranes. Piston pumps are used in a variety of industries, including automotive, aeronautics, power generation, military, marine, and manufacturing, to mention a few.

Hydraulic piston pumps are common due to their capability to enhance energy usage productivity. A hydraulic hand pump energized by a hand or foot pedal can convert a force of 4.5 pounds into a load-moving force of 100 pounds. Electric hydraulic pumps can attain pressure reaching 4,000 PSI. Because capacities vary so much, the desired usage pump must be carefully considered. Several other factors must also be considered. Standard and custom configurations of operating speeds, task-specific power sources, pump weights, and maximum fluid flows are widely available. Measurements such as rod extension length, diameter, width, and height should also be considered, particularly when a hydraulic piston pump is to be installed in place of a current hydraulic piston pump.

Hydraulic clutch pumps are mechanisms that include a clutch assembly and a pump that enables the user to apply the necessary pressure to disengage or engage the clutch mechanism. Hydraulic clutches are crafted to either link two shafts and lock them together to rotate at the same speed or detach the shafts and allow them to rotate at different speeds as needed to decelerate or shift gears.

Hydraulic pumps change hydraulic energy to mechanical energy. Hydraulic pumps are particularly designed machines utilized in commercial, industrial, and residential areas to generate useful energy from different viscous liquids pressurization. Hydraulic pumps are exceptionally simple yet effective machines for moving fluids. "Hydraulic" is actually often misspelled as "Hydralic". Hydraulic pumps depend on the energy provided by hydraulic cylinders to power different machines and mechanisms.

There are several different types of hydraulic pumps, and all hydraulic pumps can be split into two primary categories. The first category includes hydraulic pumps that function without the assistance of auxiliary power sources such as electric motors and gas. These hydraulic pump types can use the kinetic energy of a fluid to transfer it from one location to another. These pumps are commonly called ram pumps. Hydraulic hand pumps are never regarded as ram pumps, despite the fact that their operating principles are similar.

The construction, excavation, automotive manufacturing, agriculture, manufacturing, and defense contracting industries are just a few examples of operations that apply hydraulics power in normal, daily procedures. Since hydraulics usage is so prevalent, hydraulic pumps are unsurprisingly used in a wide range of machines and industries. Pumps serve the same basic function in all contexts where hydraulic machinery is used: they transport hydraulic fluid from one location to another in order to generate hydraulic energy and pressure (together with the actuators).

Elevators, automotive brakes, automotive lifts, cranes, airplane flaps, shock absorbers, log splitters, motorboat steering systems, garage jacks and other products use hydraulic pumps. The most common application of hydraulic pumps in construction sites is in big hydraulic machines and different types of "off-highway" equipment such as excavators, dumpers, diggers, and so on. Hydraulic systems are used in other settings, such as offshore work areas and factories, to power heavy machinery, cut and bend material, move heavy equipment, and so on.

Fluid’s incompressible nature in hydraulic systems allows an operator to make and apply mechanical power in an effective and efficient way. Practically all force created in a hydraulic system is applied to the intended target.

Because of the relationship between area, pressure, and force (F = P x A), modifying the force of a hydraulic system is as simple as changing the size of its components.

Hydraulic systems can transfer energy on an equal level with many mechanical and electrical systems while being significantly simpler in general. A hydraulic system, for example, can easily generate linear motion. On the contrary, most electrical and mechanical power systems need an intermediate mechanical step to convert rotational motion to linear motion.

Hydraulic systems are typically smaller than their mechanical and electrical counterparts while producing equivalents amounts of power, providing the benefit of saving physical space.

Hydraulic systems can be used in a wide range of physical settings due to their basic design (a pump attached to actuators via some kind of piping system). Hydraulic systems could also be utilized in environments where electrical systems would be impractical (for example underwater).

By removing electrical safety hazards, using hydraulic systems instead of electrical power transmission improves relative safety (for example explosions, electric shock).

The amount of power that hydraulic pumps can generate is a significant, distinct advantage. In certain cases, a hydraulic pump could generate ten times the power of an electrical counterpart. Some hydraulic pumps (for example, piston pumps) cost more than the ordinary hydraulic component. These drawbacks, however, can be mitigated by the pump"s power and efficiency. Despite their relatively high cost, piston pumps are treasured for their strength and capability to transmit very viscous fluids.

Handling hydraulic liquids is messy, and repairing leaks in a hydraulic pump can be difficult. Hydraulic liquid that leaks in hot areas may catch fire. Hydraulic lines that burst may cause serious injuries. Hydraulic liquids are corrosive as well, though some are less so than others. Hydraulic systems need frequent and intense maintenance. Parts with a high factor of precision are frequently required in systems. If the power is very high and the pipeline cannot handle the power transferred by the liquid, the high pressure received by the liquid may also cause work accidents.

Even though hydraulic systems are less complex than electrical or mechanical systems, they are still complex systems that should be handled with caution. Avoiding physical contact with hydraulic systems is an essential safety precaution when engaging with them. Even when a hydraulic machine is not in use, active liquid pressure within the system can be a hazard.

Inadequate pumps can cause mechanical failure in the place of work that can have serious and costly consequences. Although pump failure has historically been unpredictable, new diagnostic technology continues to improve on detecting methods that previously relied solely on vibration signals. Measuring discharge pressures enables manufacturers to forecast pump wear more accurately. Discharge sensors are simple to integrate into existing systems, increasing the hydraulic pump"s safety and versatility.

Hydraulic pumps are devices in hydraulic systems that move hydraulic fluid from point to point, initiating hydraulic power production. They are an important device overall in the hydraulics field, a special kind of power transmission that controls the energy which moving fluids transmit while under pressure and change into mechanical energy. Hydraulic pumps are divided into two categories namely gear pumps and piston pumps. Radial and axial piston pumps are types of piston pumps. Axial pumps produce linear motion, whereas radial pumps can produce rotary motion. The construction, excavation, automotive manufacturing, agriculture, manufacturing, and defense contracting industries are just a few examples of operations that apply hydraulics power in normal, daily procedures.

Numerous jacks have been provided in prior art. For example, U.S. Pat. Nos. 3,186,686 to Mayer; 4,174,094 to Valdespino et al.; 4,445,588 to Truninger and 4,993,688 to Mueller et al. all are illustrative of such prior art. While these units may be suitable for the particular purpose to which they address, they would not be as suitable for the purposes of the present invention as heretofore described.

A hydraulic jacking system for vehicles including a plurality of hydraulic jacks secured to the chassis of the vehicle. Each of the jacks has a ram extendable vertically downwardly from a housed position to any selected degree of extension. A similar plurality of control valves are provided. Each of the valves serve one of the jacks exclusively. Hydraulic lines interconnect each valve with its particular jack. A hydraulic fluid tank and hydraulic pump supply pressure fluid to the control valves. Each of the control valves comprise an upper valve assembly and a lower valve assembly operable simultaneously. A lever means is to operate each control valve. A pressure fluid supply means and a fluid return means are also provided. The lever means places the upper valve assembly in communication with the pressure fluid supply means and places the lower valve assembly in communication with the fluid return means in a first position. A second position of the lever means places the upper valve assembly in communication with the fluid return means and the lower valve assembly in communication with the pressure fluid supply means. In a neutral position of the lever the upper and lower valve assemblies are blanked off and fluid therewithin is trapped to provide a hydraulic lock. The pressure fluid supply means and fluid return means includes a distributor valve body. A wall divides the body into a pressure chamber and a return chamber. The pressure chamber is supplied with fluid through the pipe means from the pump and the return chamber is connected to the tank. The upper and lower valve assemblies extend across the body and passes through the wall in fluid-tight relation. Each of the valve assemblies include an outer sleeve and a piston valve slidable therein. The outer sleeve has a first orifice therethrough located within the pressure chamber and a second orifice therethrough located within the return chamber. The piston valve has a hole therethrough selectively alignable with the first or second orifice and is movable to a third position, wherein the hole is completely covered by the sleeve. Hydraulic pipes connect each of the upper valve assemblies with one side of its respective jack and connects each of the lower assemblies with the opposite side of the jack.

A primary object of the present invention is to provide an improved hydraulic lift system that will overcome the shortcomings of the prior art devices.

Another object is to provide an improved hydraulic lift system that utilizes four hydraulic struts, in which the first pair would be mounted to the front under the carriage of a motor vehicle behind the front wheels, while the second pair would be mounted to the rear under carriage of the motor vehicle forward of the rear wheels.

An additional object is to provide an improved hydraulic lift system that can be operated by the driver from inside the motor vehicle, when the engine is turned on and the transmission is in park or neutral position.

A still additional object is to provide an improved hydraulic lift system, in which an emergency hand pump, located under the hood, will operate the hydraulic struts when the engine fails to start.

FIG. 1A is a front perspective view taken in the direction of arrow 1A in FIG. 1, with the hood open, parts of the motor vehicle broken away and the hydraulic struts retracted.

FIG. 2 is a bottom perspective view taken in the direction of arrow 2 in FIG. 1, with parts of the motor vehicle broken away and the hydraulic struts retracted.

FIG. 2B is a perspective view with parts broken away and in section of some of the various components in FIG. 2A, for operating the front right hydraulic strut.

FIG. 4 is an enlarged side view taken in the direction of arrow 4 in FIG. 3, with parts broken away in phantom and in a dotted moved position, showing the front left hydraulic strut in greater detail.

Turning now descriptively to the drawings, in which similar reference characters denote similar elements throughout the several views, FIGS. 1 through 5 illustrate an improved hydraulic lift system 10 for a motor vehicle 12, comprising a plurality of hydraulic struts 14 pivotally mounted to an undercarriage 16 of the motor vehicle 12. An apparatus 18 is for supplying hydraulic pressure through the system 10. A device 20 is for hydraulically rotating each hydraulic strut 14 from an up position to a down position. An assemblage 22 is for hydraulically telescoping each hydraulic strut 14 from a retracted position to an extended position, so as to lift the motor vehicle 12 off of a flat support surface 24.

Each hydraulic strut 14 includes an outer cylinder 26. A piston rod 28 slides within the outer cylinder 26. A foot pad 30 is pivotally mounted at 32 to a lower end of the piston rod 28. The foot pad 30 will engage with the flat support surface 24 when in the down position.

The hydraulic pressure supplying apparatus 18 consists of a hydraulic pump 34. A facility 36 is for mechanically operating the hydraulic pump 34 from an engine 38 of the motor vehicle 12. The mechanically operating facility 36 is a belt and pulley assembly 40 extending between the hydraulic pump 34 and the engine 38 of the motor vehicle 12.

The hydraulic pressure supplying apparatus 18 further includes a split valve 42. A unit 44 is for fluidly connecting the split valve 42 to the hydraulic pump 34. The first fluidly connecting unit 44 includes first and second hydraulic hose lines 46, 48 extending between the hydraulic pump 34 and the split valve 42.

Each hydraulic rotating device 20 consists of a rotary actuator 50 rotatively connected to a top end 52 of the outer cylinder 26. A reversing valve 54 is electrically connected to and operated by a remote switch (not shown). A unit 56 is for fluidly connecting the reversing valve 54 to the rotary actuator 50. Another unit 58 is for fluidly connecting the reversing valve 54 to the split valve 42.

The second fluidly connecting unit 56 includes a third hydraulic hose line 60, extending between one side of the reversing valve 54 and the rotary actuator 50. A fourth hydraulic hose line 62 extends between an opposite side of the reversing valve 54 and the rotary actuator 50. The third fluidly connecting unit 58 is a fifth hydraulic hose line 64, extending between the split valve 42 and the reversing valve 54.

The hydraulic telescoping assemblage 22 comprises a unit 66 for fluidly connecting the split valve 42 to upper and lower portions of the outer cylinder 26 of the hydraulic strut 14. A control lever 68 is provided. A unit 70 is for fluidly connecting the control lever 68 to the split valve 42.

The fourth fluidly connecting unit 66 includes a sixth and seventh hydraulic hose lines 72, 74, extending concentrically between the split valve 42 and the upper and lower portions of the outer cylinder 26 of the hydraulic strut 14. The fifth fluidly connecting unit 70 is an eighth hydraulic hose line 76, extending between the split valve 42 and the control lever 68.

A transmission park/neutral interlock 78, as shown in FIG. 2A, is coupled to the eight hydraulic hose line 76, so as to make it impossible to operate the control lever 68 and prevent accidental application while the motor vehicle 12 is in motion.

An emergency hand pump 80, as shown in FIG. 1A and 2A, can be fluidly connected into the first and second hydraulic hose lines 44 and 46 between the hydraulic pump 34 and the split valve 42. The emergency hand pump 80 will operate the hydraulic struts 14 when the engine 38 fails to start.

3. Turn the remote switch on a dashboard within the motor vehicle 12 one way, to cause the rotary actuators 50 of the hydraulic rotating device 20 to lower the hydraulic struts 14 to the down position.

4. Operate the control lever 68 to make the piston rods 28 in the outer cylinders 26 of the hydraulic struts 14 to go into the extended position, until the foot pads 30 contact the flat support surface 24 to lift the wheels 82 of the motor vehicle 12 off of the flat support surface 24.

1. Operate the control lever 68 to now make the piston rods 28 in the outer cylinder 26 of the hydraulic struts 14 to go into the retracted position, so that the foot pads 30 move away from the support surface 24 to lower the wheels 82 of the motor vehicle 12 back onto the flat support surface 24.

2. Turn the remote switch on the dashboard within the motor vehicle 12 an opposite way, to cause the rotating actuators 50 of the hydraulic rotating device 20 to raise the hydraulic struts 14 to the up position.

Truninger QX43-025/R BIM Industrial Hydraulic Internal Gear Pump QX43 Filter . Truninger Hydraulic Internal Gear Pump. Truninger Hydraulic Internal Gear Pump Type: QX43-025/R BIM Working Used Condition. Removed from working Netstal Discjet 600 Injection Molder.

Condition: Used, Condition: Working Used Condition. Removed from working Netstal Discjet Injection Molder, Brand: Truninger, Model: QX43, MPN: QX43-025, Application: Industrial, Type: Hydraulic, Country/Region of Manufacture: Switzerland, Power Source: Electric, Hydraulic Pump Type: Hydraulic Gear Pump

A gear pump or motor of this kind is provided with a pair of gears brought in mesh with each other, shafts respectively extended from front and rear sides in axis center directions of the gears, and a pump main body containing these, for making a hydraulic fluid (oil) flow from a high pressure region of a meshed portion to a low pressure region of other meshed portion by rotating the two gears. According to the gear pump or motor, the pump main body is constituted by a front shaft containing main body for containing the shafts on a front side, a gear containing main body for containing the gears and a rear shaft containing main body for containing the shafts on a rear side.

There are three kinds of types of combining constituent elements of the pump main body as follows. A first type is a type of coupling the front shaft containing main body, the gear containing main body and the rear shaft containing main body to each other respectively as separate members, a second type is a type of integrating the front shaft containing main body and the gear containing main body, and a third type is a type of integrating the gear containing main body and the rear shaft containing main body. A pump main body integrated with the gear containing main body and the rear shaft containing main body is referred to as a ‘gear•rear shaft containing main body’ as follows and the type achieves advantages of reducing a number of parts in comparison with a constitution separately constituting the respective main bodies, facilitating to install a comparatively large suction port (low pressure) or delivery port (high pressure) at a side face of the main body and is reduced to practice (refer to, for example, JP-A-08-121351).

For example, according to a type of forming a low pressure communicating path by boring an inclined hole from a side of the gear containing main body and boring a hole for communicating to low pressure at an inner peripheral face of the bearing portion by recessing, a surrounding of the bearing hole is subjected to countersinking in an elliptical shape, the bearing is integrated by constituting a projected height slightly lower than a depth of the countersinking and a seal member is caught by an outer side thereof. Further, a hole communicating with a low pressure portion is bored at an inner portion subjected to the countersinking and a spacer for hampering deformation of the seal member by a negative pressure is inserted thereto. Further, when the pump main body is fabricated by a die cast system, there is carried out a method of previously forming a groove at a portion of the main body and connecting the groove to the low pressure communicating path.

However, according to the method of forming the low pressure communicating path by the inclined hole, a long slender hole needs to bore, time is taken for the working, further, a hole bored on the side of the pump main body must be closed. Further, recessing requires time and labor in working. Also the method of previously forming a die requires a working time period and a problem is posed in working accuracy. Further, according to the method of forming the low pressure communicating path by the inclined hole, the long slender hole needs to bore, time is taken in the working, further, the hole bored on the side of the pump main body needs to close. Further, also recessing is operation taking time in working and requiring labor. Also the method of previously forming the die at the cast product poses a problem that a working time period is required and working accuracy is low. Further, a consideration is taken in the projected height in integrating the bearing, the portion does not function as the bearing and therefore, an extra bearing length is needed and a cost is increased.

a pump main body containing the gears and the shafts, the pump main body including a rear shaft containing main body with bearing holes for containing to support the shafts on the rear sides of the gears so that the bearing holes are formed to penetrate a rear face of the rear shaft containing main body; and

The gear pump or motor provided by the invention is as described above in details and therefore, the following effects are achieved. (1) A shape and a constitution of the rear shaft containing main body (including the gear•rear shaft containing main body in illustrated examples, the same as follows) is extremely simplified, the constitution of the gear pump or motor can be simplified, working thereof is facilitated and a reduction in cost can be achieved.

(2) The rear face of the rear side containing main body can be shielded by the closing plate in airtight from outside, the constitution of the gear pump or motor is simplified, working thereof is facilitated and a reduction in cost can be achieved.

(3) The low pressure region can easily be communicated with a rear face space of the rear side containing main body, working thereof is facilitated and a reduction in cost can be achieved. Further, multiple series pump formation is facilitated.

An explanation will be given of a gear pump or motor provided by the invention in accordance with an embodiment shown in FIG. 1 through FIG. 3 as follows. According to the embodiment, a best mode is a constitution in which a gear•rear shaft containing main body integrated with a gear containing main body and a rear shaft containing main body is made to constitute an essential constituent element of a pump main body 1.

A first embodiment provided by the invention is shown in FIG. 1 through FIG. 3. First, FIG. 1 shows a basic constitution of a gear pump or motor by a vertical sectional view. The pump main body 1 comprises a front shaft containing main body 1F, and a gear•rear shaft containing main body 1R integrated with a gear containing main body for containing gears 2A, 2B and a rear shaft containing main body and a pair of the gears 2A, 2B are contained at inside thereof. The respective gears 2A, 2B are extended with shafts 31, 32 and 41, 42 respectively from front and rear sides in axis center directions thereof and among them, the shafts 31 and 41 are supported by bushes 6 installed at bearing holes 1B formed at the front shaft containing main body 1F and the shafts 32, 42 on rear sides thereof are supported by bushes 6 installed at bearing holes 1B formed at the gear•rear shaft containing main body 1R. The shaft 31 is integral with a shaft 3 penetrating the front shaft containing main body 1F. The shaft 3 becomes an input shaft of a rotationally driving force when the shaft 3 functions as a pump and becomes an output shaft of the rotationally driving force when the shaft 3 functions as a motor. Further, in FIG. 1, numeral 7 designates a side plate arranged to couple to respective sides of the two gears 2A, 2B for preventing leakage of a hydraulic fluid from sides of the gears 2A, 2B.

As shown by FIG. 2 showing an A—A face of FIG. 1, inside of the gear•rear shaft containing main body 1R is formed with a containing space 1S capable of containing the pair of respective gears 2A, 2B in a meshed state and the pair of respective gears 2A, 2B are contained at inside thereof. Further, the hydraulic fluid confined at an interval between the gear•rear shaft containing main body 1R and the respective gears 2A, 2B in the meshed state, that is, between teeth thereof is made to flow between a low pressure region 1L and a high pressure region 1H formed at the containing space 1S by rotating the two gears 2A, 2B to function as a pump or a motor. In the case of the pump, the low pressure region 1L is connected to a flow inlet of the hydraulic fluid and the high pressure region 1H is communicated to a delivery port. Further, in the case of functioning as the motor, the high pressure region 1H is communicated with the flow inlet of the pressurized oil and the low pressure region 1L is connected to a flow outlet of the hydraulic fluid.

On the other hand, the gear•rear shaft containing main body 1R is formed with a low pressure port 1P communicating with the low pressure region 1L, further, the low pressure port 1P is bored to penetrate in the axis core direction of the gear•rear shaft containing main body 1R and an entire region of the recess portion 1K is communicated with the low pressure region 1L. The recess portion 1K is an example of a specific constitution of a ‘communicating path’ specified in the scope of claims. There is provided the closing plate 5 for sealing the region of the rear face 1T of the gear•rear shaft containing main body 1R including the bearing holes 1B of the two shafts 32, 42 on the rear sides and the surroundings of the two bearing holes 1B in airtight from outside. By coupling the closing plate 5 to the rear face 1T of the gear•rear shaft containing main body 1R, inside of the pump main body 1 is shielded in airtight from outside. Further, a seal member 10 for sealing an interval between the closing plate 5 and the gear•rear shaft containing main body 1R in airtight is formed in a ring-like shape. Notation 1M designates a groove in a ring-like shape formed at the gear•rear shaft containing main body 1R. The seal member 10 is inserted to provide at the ring-like groove 1M and is interposed between the closing plate 5 and the gear•rear shaft containing main body 1R. Numeral 8 designates a fixing piece for coupling to the rear face 1T of the gear•rear shaft containing main body 1R. In FIG. 3, notation 1N designates a hole for penetrating the fixing piece 8 bored at the rear face 1T of the gear•rear shaft containing main body 1R. A space at the rear face 1T of the gear•rear shaft containing main body 1R is shielded in airtight from outside. Further, the low pressure port 1P is opened to the airtight space and therefore, the hydraulic fluid leaked to the space is made to flow to the low pressure region 1R at the low pressure port 1P.

As shown by FIG. 4, the pump main body 1 of a first series and a pump main body 1W of a second series are fitted together to couple. The rear face 1T of the gear•rear shaft containing main body 1R of the pump main body 1 of the first series and a front face of the front shaft containing main body 1F of the pump main body 1W of the second series are respectively formed with a recess and a protrusion fitted to each other to thereby couple the two members. In this case, the fixing piece 8 shown in the embodiment of FIG. 1 is constituted to be long for the two series. Further, as shown by FIG. 4, the shaft 32 and a shaft 33 are coupled by a spline.

Therefore, when the rotational drive force is inputted from the shaft 3, also a pump of the second series is driven to function as the pump. In this case, formation of flow paths of flow in and flow out of the hydraulic fluid can be constituted by respectively separate types, or can be constituted by a joint flow type. Further, also in the second embodiment, a low pressure port (1P in FIG. 2, FIG. 3 although not illustrated) is bored by respectively penetrating the pump main body 1 of the first series and the pump main body 1W of the second series. However, only one sheet of the closing plate 5 is sufficient. In FIG. 4, members of notations designated by notations the same as the notations in FIG. 1 through FIG. 3 are provided with functions the same as those of the members shown in FIG. 1 through FIG. 3, or operated similarly and a detail explanation thereof will be omitted.

The gear pump or motor provided by the invention is not limited to the above-described embodiment although the embodiment has been shown, but can be constituted by an example of integrating the gear containing main, body and the front shaft containing main body to be separate from the rear shaft containing main body, or a constitution in which the gear containing main body, the front shaft containing main body and the rear shaft containing main body are respectively separate from each other. Further, also the material is not limited to aluminum but the pump main body or the like can be made of cast iron and the invention includes all of the modified examples and other modified examples making full use of the characteristics of the invention.

Fig. 1 shows the partial cut away side views according to the spray moulding press structure of first embodiment of the invention, block diagram shows the control system of spray moulding press, Fig. 2 is a schematic representation, show in the oil pressure control system of the spray moulding press shown in Fig. 1, adopt the pressure flow speed characteristic of the pressure compensator control of adjustable drainage pump, Fig. 3 shows the pressure flow speed characteristic schematic representation that adopts adjustable drainage pump to carry out power constant control.

Be used to operate the device of above-mentioned primary component, comprise electric mould opening/closing device 11, hydraulic die clamp device 12, hydraulic product liftout attachment 13, electric bolt drive unit 14, and hydraulic pressure injection device 15.As the hydraulic energy source that pressure hydraulic oil is provided to hydraulic starter, when pump reaches the fastest rotational speed, adopt adjustable drainage pump 54, this drainage pump has required maximum, the conveying capacity that transmits to each hydraulic starter at least.The transmission oil pressure of pump 54 cuts off function (indicatrix shown in Fig. 2) control by the transmission of aux. pressure compensator 55.In addition, pump 54 is driven by AC motor 53, and the rotational speed of AC motor 53 is controlled by transducer 52, thereby can be with stepless pattern control rotational speed.

For hydraulic die clamp device 12, hydraulic starter comprises the enlarged bore piston 32 that has short stroke and large diameter hydraulic die clamping cylinder 2a and slide in oil cylinder 2a.In fixed mold plate 2, be provided with a plurality of (present embodiment is four) mold cramping oil cylinder 2a.Piston 32 is connected to become integral body with push rod 31.After the circular groove of clip nut 33 and the formation of push rod 31 intermediate reach cooperated, push rod 31 was fixed on the outside of the plate 3 that moves moulds, conversion four-way cock valve 56.Thus, by clamping mold 4 and 5, hydraulic oil is sent among the figure in the mould holder oil cylinder 22a left side.By the maximum oil pressure of adjustable drainage pump 54, can determine the mold cramping oil pressure.The transmission oil pressure of pump 54 cuts off function (indicatrix shown in Fig. 2) control by the transmission of aux. pressure compensator 55.Deciding in the specific pressure valve in pressure compensator 55 is used to stop the command program control of one group of pressure of flow velocity by controller 51.

Hydraulic product liftout attachment 13 is by hydraulic jack 34, piston 35, ejector rod 36 compositions such as grade.The hydraulic oil that transmits from adjustable drainage pump 54 by four-way cock valve 61 conversion with operation ejector rod 36, utilizes ejector rod that product is protruded out and takes out 5 from moving moulds.

Hydraulic pressure injection device 15 has with spray oil cylinder 6 becomes whole spray tank plate 37, and spray tank plate 37 is provided with symmetrically arranged hydraulic jack 37a of a pair of central axes with respect to spray oil cylinder 6 and hydraulic piston 38.By operating these hydraulic jacks 37a and piston 38, the spray bolt is driven by way of piston rod 39 and bolt drive motor plate 42 along rectilinear direction.Especially, owing to be formed with hydraulic pressure injection device 15, according to the spray bolt forward/backward speed controlling program of enrolling in the controller 51, with the hydraulic oil of four-way cock valve 58 conversions from adjustable drainage pump 54 transmission, can adjust the rotational speed of adjustable drainage pump 54 thus, thus the forward velocity of may command spray bolt 7.

Owing to be formed with hydraulic pressure nozzle contact device 16, by using four-way change-over valve 62 from certain state exchange, in described certain state, the nozzle of spray oil cylinder 26 separates with fixed mold plate 2, the hydraulic oil that transmits from adjustable drainage pump 54 is sent in the left chamber of hydraulic jack 43 Fig. 1, piston 44 moves in direction left, and bar 45 is moved spray oil cylinder 37 to left side, and the nozzle of spray oil cylinder 6 contacts with fixed mold plate 2 thus.

The nozzle of spray oil cylinder 6 contacts with fixed mold plate 2 by nozzle contact device 16, oil pressure in the right chamber of hydraulic jack 43 remains unchanged in the preparatory work of spray process, can start working from the state of opening mould fully thus, in this state, the plate 3 that moves moulds is positioned at and retreats the end.

Rotate on the mould closing direction by spherical bolt axle 21, move moulds 5 and the plate 3 that moves moulds move, and before mould 4 and 5 contacts with each other, stop just.Using locking device, as clip nut 33, make the plate 3 that moves moulds shift out and in bond after, hydraulic oil is sent among the hydraulic jack 2a, so that mould 4 and 5 is carried out mold cramping.

Beginning in the mold cramping process, four-way change-over valve 56 is at first opened the hydraulic oil supply tube, with to mold cramping oil cylinder 2a supply hydraulic fluid, tunable pump 54 is under the oil pressure effect, with by beginning to start (simultaneously, oil pressure being arranged on the mold cramping pressure value of setting place) under the flow velocity program effect in the controller of the order of controller 51.When in the left chamber that hydraulic oil is sent to mold cramping oil cylinder 2a among Fig. 1, piston 32 moves reducing the narrow break joint between mould 4 and 5, thereby mould 4 and 5 contacts with each other, hydraulic oil by compression, boost pressure thus.When oil pressure reached the value of setting of mold cramping pressure, pressure compensator 55 acted on the transmission changeable mechanism (swash plate) of adjustable drainage pump 54, kept oil pressure simultaneously to carry out the cut-out control of flow velocity.After cutting off control, only supply the pressure oil that spills from mold cramping oil cylinder 2a, thereby reduce the rotational speed of adjustable drainage pump 54, to reduce power consumption and noise.

When closing all parts of four-way cock valve 56, mould 4 and 5 continuation clamp, and hydraulic pressure injection device 15 is started working, with the melting resin spray of spray bolt 7 top ends that will accumulate in spray oil cylinder 6 in the cavity of mould 4 and 5.Melting resin cooling in mould cavity, and in keeping pressure status, solidify to form product.In the process that melting resin solidifies, adjustable drainage pump 54 is in halted state, keeps oil pressure simultaneously.

Carry out the mould release process of mould 4 and 5 subsequently.In releasing course, with four-way cock valve 56 be transformed into above-mentioned mould holding process in identical dislocation, open two logical throw over switch valves 57, adjustable thus drainage pump 54 is started working under the flow velocity program effect of controller 51.Supply in the oil pocket of piston 32 both sides in mold cramping oil cylinder 2a and set oil pressure, because the oil pressure between piston 32 both sides starts area difference, piston 32 is subjected to the power of mould release direction, thus the fixed mould 4 and 5 releases each other that move moulds.Simultaneously, hydraulic oil flows to the outside hardly.

Locking device, as clip nut 33 reverse operations, to improve the restraining force of push rod 31 with respect to the Die and mould plate 3 that moves, electricity consumption opening/closing device 11 moves the plate 3 that moves moulds thus.After mould 4 and 5 was opened fully, product liftout attachment 13 carried out hydraulic operation so that stretch out push rod 36, product is discharged move moulds 5 thus.After discharging product, next mould closing operation begins to start.

Pull down the nozzle of spray oil cylinder 6 after injection molder 10 work is finished from fixed mold plate 2, to carry out the resin cleaning,