Hydraulic device of oil cylinder of mold closing machine

By designing a hydraulic device including oil tank, motor, clamp valve block, gear pump, energy storage, pressure relay, overflow valve, liquid thermometer and oil return filter, the problems of high energy consumption of existing hydraulic devices and insufficient oil circuit temperature detection are solved, and the effects of energy conservation and fault prevention are achieved.

CN222615695UActive Publication Date: 2025-03-14NANJING RUNKEEP MASCH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421350565.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-13
Publication Date
2025-03-14
Estimated Expiration
2034-06-13

AI Technical Summary

Technical Problem

Existing hydraulic devices rely on electricity to maintain oil pressure during use, resulting in an increase in energy consumption and lack of detection of oil circuit temperature, which is prone to failure due to excessive oil temperature.

Method used

A hydraulic device for the mold clamping machine oil cylinder is designed, including a fuel tank, motor, clamp valve block, gear pump, energy storage device, pressure relay, overflow valve, liquid thermometer and oil return filter. Through these components, real-time detection and automatic oil replenishment of oil circuit pressure is achieved, preventing the motor from running for a long time, and monitoring the oil temperature through the liquid thermometer to prevent high-temperature failure.

Benefits of technology

Effectively save energy, prevent the motor from running for a long time without stopping, ensure stable oil pressure, and prevent faults caused by high temperature or too low liquid level through real-time monitoring.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222615695U_ABST
    Figure CN222615695U_ABST
Patent Text Reader

Abstract

The utility model provides a hydraulic device of a die spotting machine oil cylinder, which relates to the field of oil cylinder hydraulic devices and comprises an oil tank, the rear end of the top of the oil tank is fixedly connected with a motor, and the right side of the top of the oil tank is fixedly connected with a wheel clamp valve block. The gear pump can receive electric signals for control, so that pumped flow can be changed, variable-speed operation of the oil cylinder is achieved, pressure in an oil way can be detected in real time through the pressure relay, and when the pressure is larger than a preset value, the motor loses power, the energy accumulator accumulates energy to enable the oil way to enter a pressure maintaining state, the pressure of the oil way is guaranteed, and the service life of the oil cylinder is prolonged. The motor is prevented from running without shutdown for a long time, energy can be saved, redundant oil can flow back to the oil return filter through opening of the overflow valve, the oil return filter can filter the oil, the oil is conveyed into the oil tank again to be stored, and the oil temperature and the liquid level in the oil tank can be monitored in real time through the liquid temperature meter and the liquid level meter; and faults caused by high temperature or too low liquid level are effectively prevented.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the field of oil cylinder hydraulic devices, in particular to a hydraulic device for an oil cylinder of a mold clamping machine. Background Art

[0002] During the mold closing process, the injection mold needs to be closed and opened by a cylinder hydraulic device to complete the injection molding of plastic products. The cylinder hydraulic device is usually used to control the opening and closing action of the injection mold to improve the production efficiency of the injection molded products.

[0003] When the hydraulic device is used during the injection molding, the hydraulic pump delivers high-pressure hydraulic oil to the movable cylinder, pushing the piston forward and driving the mold to close. When the injection molding process is completed, the hydraulic pump reverses, the hydraulic oil in the cylinder returns to the hydraulic oil tank, and the piston of the movable cylinder moves backward to open the mold and complete the injection molding cycle. However, when the hydraulic device of the prior art is in use, since it relies on electricity to maintain the oil pressure throughout the process, it will increase energy consumption, and it does not have the ability to detect the oil circuit temperature. Therefore, when it is used when the oil temperature is too high, it is very easy to cause failures in use.

[0004] In summary, the utility model therefore provides a hydraulic device for a clamping machine cylinder to solve the above problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A hydraulic device for a mold clamping machine cylinder comprises an oil tank, a motor is fixedly connected to the rear end of the top of the oil tank, a wheel clamp valve block is fixedly connected to the right side of the top of the oil tank, a solenoid valve is arranged on the top of the wheel clamp valve block, a gear pump is fixedly connected to the back of the oil tank, and the two ends of the gear pump are respectively connected to the oil tank and the wheel clamp valve block, an accumulator is arranged on the right side of the oil tank, and the accumulator is connected to the wheel clamp valve block through a pipeline, a pressure relay is arranged at the front end of the left side of the top of the oil tank, an overflow valve is arranged on the front side of the wheel clamp valve block, a liquid thermometer is fixedly connected to the top of the oil tank, and the detection end of the liquid thermometer extends to the inner cavity of the oil tank, and a return oil filter is fixedly connected to the rear end of the right side of the top of the oil tank, and the return oil filter is connected to the oil tank.

[0007] Furthermore, in the utility model, a cover is movably connected to the front of the oil tank via bolts, and an air filter is arranged on the top of the oil tank.

[0008] Furthermore, in the utility model, a pressure gauge is provided on the top of the pressure relay, and the bottom of the pressure gauge is fixedly connected to the top of the oil tank.

[0009] Furthermore, in the utility model, the back side of the wheel clamp valve block is connected to a pressure measuring joint, and the pressure measuring joint can be connected to a pressure relay through a pipeline. A throttle valve is arranged on the left side of the wheel clamp valve block.

[0010] Furthermore, in the utility model, a bell-shaped cover is provided on the top of the gear pump, and the bell-shaped cover is connected to the gear pump, a manual pump is provided on the right side of the oil tank, and both ends of the manual pump are respectively connected to the oil tank and the wheel clamp valve block.

[0011] Furthermore, in the utility model, a support plate is fixedly connected to the right side of the oil tank, and the bottom of the accumulator is fixedly connected to the top of the support plate.

[0012] Beneficial effects: The utility model has the following beneficial effects:

[0013] The utility model stores oil through an oil tank, obtains electricity through an electric motor and an electromagnetic valve, and at the same time, the gear pump can operate to transmit the oil in the oil tank to the wheel clamp valve block, and oil is input into the wheel clamp through the wheel clamp valve block, so that the oil cylinder will operate, and the gear pump can receive electrical signal control, and thus the flow rate of the pump can be changed to realize the variable speed operation of the oil cylinder, and the pressure in the oil circuit can be detected in real time through a pressure relay, and then when the pressure is greater than a preset value, the motor will lose power, and the accumulator will store energy to make the oil circuit enter a pressure maintaining state, thereby ensuring the oil circuit pressure and preventing the motor from running for a long time without stopping, which can save energy, and the excess oil can be returned to the return oil filter by opening the overflow valve, so that the return oil filter can filter the oil and transmit it to the internal storage of the oil tank again, and the oil temperature and liquid level in the oil tank can be monitored in real time through a liquid thermometer and a liquid level gauge, effectively preventing faults caused by high temperature or too low a liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a front view structural diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the utility model from top view;

[0017] Figure 4 It is a rear view structural schematic diagram of the utility model;

[0018] Figure 5 It is a side structural schematic diagram of the utility model.

[0019] In the figure:

[0020] 1. Oil tank; 111. Sealing cover; 112. Air filter; 2. Electric motor; 3. Wheel clamp valve block; 311. Pressure measuring joint; 312. Throttle valve; 4. Solenoid valve; 5. Gear pump; 511. Bell cover; 6. Accumulator; 611. Support plate; 8. Pressure relay; 811. Pressure gauge; 9. Overflow valve; 10. Return oil filter; 11. Liquid temperature gauge; 12. Manual pump; 13. Liquid level gauge. DETAILED DESCRIPTION

[0021] In order to better understand the technical content of the utility model, specific embodiments are cited and described as follows in conjunction with the accompanying drawings. In this disclosure, various aspects of the utility model are described with reference to the accompanying drawings, and many illustrative embodiments are shown in the accompanying drawings. The embodiments of the present disclosure are not necessarily defined to include all aspects of the utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the utility model are not limited to any implementation method. In addition, some aspects disclosed in the utility model can be used alone, or used in any appropriate combination with other aspects disclosed in the utility model.

[0022] Example 1

[0023] like Figure 1-5 As shown, it is the first embodiment of the utility model, which provides a hydraulic device of a mold clamping machine cylinder, including an oil tank 1, a motor 2 is fixedly connected to the rear end of the top of the oil tank 1, a wheel clamp valve block 3 is fixedly connected to the right side of the top of the oil tank 1, a solenoid valve 4 is arranged on the top of the wheel clamp valve block 3, a gear pump 5 is fixedly connected to the back of the oil tank 1, and the two ends of the gear pump 5 are respectively connected to the oil tank 1 and the wheel clamp valve block 3, an accumulator 6 is arranged on the right side of the oil tank 1, and the accumulator 6 is connected to the wheel clamp valve block 3 through a pipeline, a pressure relay 8 is arranged at the front end on the left side of the top of the oil tank 1, an overflow valve 9 is arranged on the front of the wheel clamp valve block 3, a liquid thermometer 11 is fixedly connected to the top of the oil tank 1, and the detection end of the liquid thermometer 11 extends to the inner cavity of the oil tank 1, and a return oil filter 10 is fixedly connected to the rear end on the right side of the top of the oil tank 1, and the return oil filter 10 is connected to the oil tank 1.

[0024] like Figure 1-5As shown, the oil is stored in the oil tank 1, and the electric motor 2 and the solenoid valve 4 are powered. At the same time, the gear pump 5 can operate to transfer the oil in the oil tank 1 to the wheel clamp valve block 3, and the oil is input into the wheel clamp through the wheel clamp valve block 3, so that the oil cylinder will operate. The gear pump 5 can receive electrical signal control, and then the pump flow can be changed to realize the variable speed operation of the oil cylinder. The pressure in the oil circuit can be detected in real time through the pressure relay 8. When the pressure is ≤100bar, the pressure relay 8 sends a low signal, and the motor 2 restarts. When When the pressure is ≥160bar, after the pressure relay 8 sends a high signal, the motor 2 loses power and completes the automatic oil replenishment and pressure maintenance action to ensure the oil circuit pressure and prevent the motor 2 from running for a long time without stopping, which can save energy. By opening the overflow valve 9, the excess oil can flow back to the return oil filter 10, so that the return oil filter 10 can filter the oil and transmit it to the internal storage of the oil tank 1 again. The oil temperature and liquid level inside the oil tank 1 can be monitored in real time by the liquid thermometer 11 and the liquid level meter 13, effectively preventing faults caused by high temperature or too low liquid level.

[0025] Example 2

[0026] Reference Figure 1-3 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment.

[0027] In this embodiment, a cover 111 is movably connected to the front of the oil tank 1 via bolts, and an air filter 112 is arranged on the top of the oil tank 1 .

[0028] A pressure gauge 811 is provided on the top of the pressure relay 8 , and the bottom of the pressure gauge 811 is fixedly connected to the top of the oil tank 1 .

[0029] The back of the wheel clamp valve block 3 is connected to a pressure measuring joint 311 , which can be connected to the pressure relay 8 through a pipeline. A throttle valve 312 is arranged on the left side of the wheel clamp valve block 3 .

[0030] like Figure 1-3 As shown, the amount of oil transmitted by the hydraulic oil can be limited by the throttle valve 312, and it can be connected to the pressure relay 8 through the pressure measuring joint 311, so that the pressure relay 8 can monitor and analyze the oil circuit pressure in real time. The oil circuit pressure can be displayed by the pressure gauge 811, which is convenient for personnel to check. The oil tank 1 can be closed by the cover 111, and vice versa, the oil tank 1 can be opened to facilitate cleaning of the inside of the oil tank 1. The impurities in the air can be intercepted and filtered through the air filter 112.

[0031] Example 3

[0032] Reference Figure 1 , 2 and 5, which are the third embodiment of the present utility model, and this embodiment is based on the first two embodiments.

[0033] In this embodiment, a bell-shaped cover 511 is provided on the top of the gear pump 5, and the bell-shaped cover 511 is connected to the gear pump 5. A manual pump 12 is provided on the right side of the oil tank 1, and both ends of the manual pump 12 are connected to the oil tank 1 and the wheel clamp valve block 3 respectively.

[0034] A support plate 611 is fixedly connected to the right side of the oil tank 1 , and the bottom of the accumulator 6 is fixedly connected to the top of the support plate 611 .

[0035] like Figure 1 , 2 As shown in FIG. 5 , the bell cover 511 can reduce bubbles generated by oil transmission, the manual pump 12 can be used to perform oil transmission in the event of power failure, and the support plate 611 can be used to stably support the accumulator 6, thereby ensuring the stability of the accumulator 6.

[0036] When in use, first press the external "mold closing" switch to energize the motor 2 and the solenoid valve 4, and at the same time the gear pump 5 will start to operate, and then the gear pump 5 can transfer the oil in the oil tank 1 to the wheel clamp valve block 3. During the transmission process, the bell cover 511 can reduce the generation of bubbles in the oil, and the oil is input into the wheel clamp through the wheel clamp valve block 3, and then the oil cylinder will operate due to the oil pressure. When the gear pump 5 is in operation, it can receive electrical signal control, and then the pump flow can be changed to achieve variable speed operation of the oil cylinder. The pressure in the oil circuit can be detected in real time through the pressure relay 8. When the pressure is ≤100bar, the pressure relay 8 sends a low signal, the motor 2 restarts, and the reverse When the pressure is ≥160bar, after the pressure relay 8 sends a high signal, the motor 2 loses power, and the automatic oil replenishment and pressure maintenance action is completed to ensure the oil circuit pressure and prevent the motor 2 from running for a long time without stopping, which can save energy. By opening the overflow valve 9, the excess oil can flow back to the return oil filter 10, so that the return oil filter 10 can filter the oil and transmit it to the internal storage of the oil tank 1 again. The oil temperature and liquid level inside the oil tank 1 can be monitored in real time by the liquid thermometer 11 and the liquid level meter 13, effectively preventing faults caused by high temperature or too low liquid level. When the mold is closed, by pressing the external "open mold" switch, the solenoid valve 4 loses power, the oil cylinder is depressurized, and the mold is opened.

[0037] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0038] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A hydraulic device for a mold clamping machine cylinder, comprising an oil tank (1), characterized in that: The rear end of the top of the oil tank (1) is fixedly connected to an electric motor (2), the right side of the top of the oil tank (1) is fixedly connected to a wheel clamp valve block (3), the top of the wheel clamp valve block (3) is provided with an electromagnetic valve (4), the back of the oil tank (1) is fixedly connected to a gear pump (5), and the two ends of the gear pump (5) are respectively connected to the oil tank (1) and the wheel clamp valve block (3), and the right side of the oil tank (1) is provided with an accumulator (6), and the accumulator (6) is connected to the oil tank (1) through a pipe. The oil tank (1) is connected to the wheel clamp valve block (3) by a circuit, a pressure relay (8) is arranged at the front end on the left side of the top of the oil tank (1), an overflow valve (9) is arranged on the front side of the wheel clamp valve block (3), a liquid thermometer (11) is fixedly connected to the top of the oil tank (1), and the detection end of the liquid thermometer (11) extends to the inner cavity of the oil tank (1), and a return oil filter (10) is fixedly connected to the rear end on the right side of the top of the oil tank (1), and the return oil filter (10) is connected to the oil tank (1).

2. The hydraulic device of the mold clamping machine cylinder as claimed in claim 1, characterized in that: The front of the oil tank (1) is movably connected to a cover (111) via bolts, and the top of the oil tank (1) is provided with an air filter (112).

3. The hydraulic device of the mold clamping machine cylinder as claimed in claim 1, characterized in that: A pressure gauge (811) is provided on the top of the pressure relay (8), and the bottom of the pressure gauge (811) is fixedly connected to the top of the oil tank (1).

4. The hydraulic device of the mold clamping machine cylinder as claimed in claim 1, characterized in that: The back of the wheel clamp valve block (3) is connected to a pressure measuring joint (311), and the pressure measuring joint (311) can be connected to a pressure relay (8) through a pipeline. A throttle valve (312) is arranged on the left side of the wheel clamp valve block (3).

5. The hydraulic device of the mold clamping machine cylinder as claimed in claim 1, characterized in that: A bell-shaped cover (511) is arranged on the top of the gear pump (5), and the bell-shaped cover (511) is connected to the gear pump (5). A manual pump (12) is arranged on the right side of the oil tank (1), and two ends of the manual pump (12) are respectively connected to the oil tank (1) and the wheel clamp valve block (3).

6. The hydraulic device of the mold clamping machine cylinder as claimed in claim 1, characterized in that: A support plate (611) is fixedly connected to the right side of the oil tank (1), and the bottom of the accumulator (6) is fixedly connected to the top of the support plate (611).