CN209738222U - Die sinking hydraulic control system of injection molding machine - Google Patents
Die sinking hydraulic control system of injection molding machine Download PDFInfo
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- CN209738222U CN209738222U CN201920142319.6U CN201920142319U CN209738222U CN 209738222 U CN209738222 U CN 209738222U CN 201920142319 U CN201920142319 U CN 201920142319U CN 209738222 U CN209738222 U CN 209738222U
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Abstract
The utility model discloses an injection molding machine die sinking hydraulic control system, including the die sinking hydro-cylinder, with the die sinking hydro-cylinder have the first oil circuit of being connected in the pole chamber and with the second oil circuit that the no pole chamber of die sinking hydro-cylinder is connected, still include first electric liquid direction valve and second electric liquid direction valve, the A1 interface of first electric liquid direction valve and the P2 interface connection of second oil circuit and second electric liquid direction valve, the B1 interface is connected with first oil circuit, and the P1 interface passes through the fuel feeding oil circuit with power oil source P and is connected, and the B2 interface connection of T1 interface and second electric liquid direction valve, the A2 interface of second electric liquid direction valve, T2 interface all are connected with oil tank T, still be connected with first oil return circuit 310 between second oil circuit and the oil tank T, ooff valve and choke valve are equipped with on the first oil return oil circuit. The buffering is adjusted by adjusting the size of the return oil flow through the throttle valve in the die opening slow-speed section and the die opening deceleration section, so that the impact of the die opening slow-speed section and the deceleration section is greatly reduced, and the machine vibration can be effectively reduced.
Description
Technical Field
The utility model relates to an injection molding machine technical field especially relates to an injection molding machine melten gel screw rod.
Background
the injection molding machine with the hinged mold locking structure has unique advantages, the force generated by the oil cylinder with the smaller diameter is changed into larger force to act on the mold locking two plates through the amplification of the hinge, so that the required mold locking force and the faster mold opening and closing speed are met, and the middle of the injection molding machine from the mold locking to the mold opening is required to pass through the actions of slow mold closing, fast mold closing, slow mold closing, high-pressure mold locking, multistage injection, multistage pressure maintaining, pre-molding, cooling shaping, slow mold opening, fast mold opening, slow mold opening, ejection and the like at least, and each action has different requirements on pressure and speed. With the development of society, the requirements on the speed and the noise of the injection molding machine are higher and higher due to the improvement of productivity, but the speed, the noise and the impact are consistent, and the speed and the impact correspondingly generate great noise and impact.
In the existing injection molding machine with the hinged mold locking structure (the existing control oil path is shown in figure 1), no reaction force acts on an oil cylinder piston, so that large hydraulic impact force is generated in the slow-speed section action and the deceleration section action of mold opening, vibration and noise are generated in the machine, the stability and the service life of the machine are influenced, and the noise of a working environment is increased; the speed of the slow die opening section is too high, the deviation of the die opening termination position is large, the repetition precision is poor, the control is difficult, the surface of a plastic product is easy to be damaged, and the qualification rate of the product is reduced; in addition, the deviation of the mold opening termination position is large, so that the manipulator cannot accurately position when taking plastic products, and the production efficiency is reduced; and the cartridge valve in the existing control oil circuit is difficult to control, the oil inlet amount of the rodless cavity is difficult to increase when the mold is quickly locked, and the speed of the mold locking action is slow. Therefore, there is a need for improvements and optimizations to the prior art.
SUMMERY OF THE UTILITY MODEL
For overcoming the not enough of prior art, the utility model provides an injection molding machine die sinking hydraulic control system to solve the big problem of die sinking termination position deviation of current control oil circuit impact force.
The utility model provides a technical scheme that its technical problem adopted is:
The utility model provides an injection molding machine die sinking hydraulic control system, includes the die sinking hydro-cylinder, with the first oil circuit that the pole chamber of die sinking hydro-cylinder is connected and the second oil circuit of being connected with the no pole chamber of die sinking hydro-cylinder, still includes first electric liquid direction valve and second electric liquid direction valve, the A1 interface of first electric liquid direction valve and the P2 interface connection of second oil circuit and second electric liquid direction valve, B1 interface are connected with first oil circuit, P1 interface and power oil source P are connected through the oil supply oil circuit, T1 interface and the B2 interface connection of second electric liquid direction valve, the A2 interface of second electric liquid direction valve, T2 interface all are connected with oil tank T, still be connected with first oil return circuit 310 between second oil circuit and the oil tank T, be equipped with ooff valve and choke valve on the first oil return oil circuit.
The switching valve adopts a two-position four-way electromagnetic reversing valve, an A3 interface and a P3 interface of the switching valve are connected with a first oil return path on one side of a second oil path, and a B3 interface and a T3 interface of the switching valve are connected with a first oil return path on one side of an oil tank T.
And the A2 interface and the T2 interface of the second electro-hydraulic directional valve are both connected to the oil tank T through a second oil return way.
And the power of the first electro-hydraulic directional valve and the second electro-hydraulic directional valve utilizes the hydraulic power of the system.
and three-position four-way electromagnetic reversing valves are arranged between the two ends of the first electro-hydraulic directional valve and the second electro-hydraulic directional valve and between the power oil source P and the oil tank T.
the utility model has the advantages that: the buffering is adjusted by adjusting the oil return flow through the throttle valve in the die opening slow-speed section and the die opening deceleration section, the back pressure generated by throttling acts on the piston, so that the movement of the machine hinge is buffered, and the throttle valve only controls the amount of oil passing through, so that the opening and closing actions do not exist, the movement of the machine hinge is continuous and stable, the impact of the die opening slow-speed section and the deceleration section is greatly reduced, the machine vibration can be effectively reduced, the accuracy of the die opening termination position can be improved by adjusting the throttle valve, and the production efficiency is guaranteed; in addition, all the cartridge valves in the existing oil way are changed into the electro-hydraulic directional valves, so that the control is easier than that of the cartridge valves, and in the process of fast mold locking, the oil inlet amount of the rodless cavity can be increased under the condition that the oil supply amount of a power source P is not changed, and the speed of mold locking action is accelerated.
Drawings
FIG. 1 is a schematic diagram of a prior art hydraulic control system;
Fig. 2 is a schematic structural diagram of an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of the embodiment of the present invention when the hydraulic power of the system itself is utilized.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1-3, the mold opening hydraulic control system of the injection molding machine comprises a mold opening oil cylinder 100, a first oil path 200 connected with a rod cavity 110 of the mold opening oil cylinder 100, a second oil path 300 connected with a rodless cavity 120 of the mold opening oil cylinder 100, a first electro-hydraulic directional valve 400 and a second electro-hydraulic directional valve 500, the A1 interface of the first electro-hydraulic directional valve 400 is connected with the second oil way 300 and the P2 interface of the second electro-hydraulic directional valve 500, the B1 interface is connected with the first oil way 200, the P1 interface is connected with the power oil source P through the oil supply oil way 210, the T1 interface is connected with the B2 interface of the second electro-hydraulic directional valve 500, the a2 interface and the T2 interface of the second electro-hydraulic directional valve 500 are both connected with the oil tank T through the second oil return path 320, a first oil return path 310 is connected between the second oil path 300 and the oil tank T, and a switch valve 600 and a throttle valve 700 are installed on the first oil return path 310; specifically, the switching valve 600 is a two-position four-way electromagnetic directional valve, an a3 port and a P3 port of which are connected to the first oil return passage 310 on the second oil passage 300 side, and a B3 port and a T3 port of which are connected to the first oil return passage 310 on the oil tank T side.
When the mold opening is in a slow-speed section, the first electro-hydraulic directional valve 400 is controlled to act to enable a P1 interface to be communicated with a B1 interface, an A1 interface to be communicated with a T1 interface, a P2 interface of the second electro-hydraulic directional valve 500 to be communicated with a B2 interface, an A2 interface to be communicated with a T2 interface, a P3 interface of the switch valve 600 to be communicated with a B3 interface and an A3 interface to be communicated with a T3 interface, namely the second electro-hydraulic directional valve 500 is in a disconnected state, the switch valve 600 is in an opened state, a power oil source P flows in from the P1 interface through an oil supply oil path 210 and flows out from the B1 interface, and enters a rod cavity 110 of the mold opening oil cylinder 100 through a first oil path 200 to push the piston 130 to act in the mold opening direction, the piston 130 drives the piston rod 140 to start slow mold opening, at the moment, the piston 130 compresses the rodless cavity 120 to discharge oil outwards through a second oil path 300, and the oil discharged from the rodless cavity 120 can only return to an oil, the buffer action is provided for the movement of the machine hinge, the movement is continuous, and the smooth transition to the rapid die opening section is convenient.
During the fast opening period, the first electro-hydraulic directional valve 400 and the switch valve 6 are kept unchanged, the second electro-hydraulic directional valve 500 is controlled to act, the P2 interface is communicated with the A2 interface, the B2 interface is communicated with the T2 interface, oil discharged from the rodless cavity 120 flows back in two ways from the A2 interface through the second oil return path 320 and from the switch valve 600 and the throttle valve 700 through the first oil return path 310, and the oil returns to the oil tank T fast, so that the opening speed can be effectively increased.
And the mold opening deceleration section repeats the action of the mold opening slow section until the mold opening is finished. The buffering is adjusted by adjusting the oil return flow through the throttle valve 700 at the die opening slow speed section and the die opening deceleration section, and the back pressure generated by throttling acts on the piston 130, so that the buffering effect is achieved on the mechanical hinge movement. And because the throttle valve 700 only controls the amount of oil passing through, there is no opening and closing action, the movement of the machine hinge is continuous and smooth, the impact of the slow speed section and the deceleration section of the mold opening is greatly reduced, the vibration of the machine can be effectively reduced, and the accuracy of the mold opening termination position can be improved by adjusting the throttle valve 700.
When the mold is quickly locked, the first electro-hydraulic directional valve 400 is controlled to act to enable a P1 interface to be communicated with an A1 interface, a B1 interface to be communicated with a T1 interface, the second electro-hydraulic directional valve 500 is controlled to act to enable a P2 interface to be communicated with a B2 interface and an A2 interface to be communicated with a T2 interface, the switch valve 600 is powered off and reset to disconnect the first oil return passage 310, the power oil source P flows in from the P1 interface through the oil supply passage 210 and flows out from the A1 interface, enters the rodless cavity 120 of the mold opening oil cylinder 100 through the second oil passage 300, the piston 130 is pushed to act along the mold locking direction, the piston 130 drives the piston rod 140 to start quick mold locking, at the moment, the piston 130 compresses the rod cavity 110, oil is discharged through the first oil passage 200, oil discharged from the rod cavity 110 flows out through the B1-T1-B2-P2 to join oil flowing out from the A1 to enter the rodless cavity 120, and the oil discharged from the rodless cavity 120 is, the speed of the mode locking action is accelerated, so that the power of the power source P is utilized to the maximum extent, the power does not need to be increased, and the resources and the cost are effectively saved.
Furthermore, the power of the first electro-hydraulic directional valve 400 and the second electro-hydraulic directional valve 500 utilizes the hydraulic power of the system, three-position four-way electromagnetic directional valves 800 are arranged between the two ends of the first electro-hydraulic directional valve 400 and the second electro-hydraulic directional valve 500 and between the power oil source P and the oil tank T, and the two three-position four-way electromagnetic directional valves 800 provide power for switching valve positions to the first electro-hydraulic directional valve 400 and the second electro-hydraulic directional valve 500 according to the control action of each stage without additionally arranging a hydraulic source.
During the test, the applicant applies the above technical solution to the high-speed machine K568L-X manufactured by the company, and installs the mold on the machine to simulate the normal production state, and adjusts the machine mold opening parameters to the following table:
| Parameter(s) | At a slow speed | Medium speed | Fast speed | Low pressure | High pressure |
| Pressure (bar) | 30 | 50 | 50 | 50 | 50 |
| Speed (m/s) | 20 | 50 | 60 | 65 | 50 |
| Position (mm) | 430. | 380. | 300. | 250. | 10.0 |
The mode locking parameters were adjusted to the table below:
| Parameter(s) | At a slow speed | Medium speed | Fast speed | Low pressure | High pressure |
| Pressure (bar) | 80 | 80 | 40 | 10 | 175 |
| Speed (m/s) | 70 | 70 | 50 | 10 | 70 |
| Position (mm) | 420. | 100. | 15.0 | 1.8 | 0.0 |
The machine mold opening and mold locking actions are stable in the test process, the vibration is greatly reduced compared with that before an oil way is not changed, the following table is a machine running position recording table, and the mold opening termination position (unit: mm) is recorded in detail:
| Serial number | Shooting glue E | Pressure maintaining device | melt E | Loosening E | Opening die E |
| 500 | 69.2 | 69.3 | 103.5 | 113.4 | 456.6 |
| 499 | 69.4 | 69.4 | 103.2 | 113.3 | 456.3 |
| 498 | 69.1 | 69.2 | 103.3 | 113.5 | 456.5 |
| 497 | 69.5 | 69.5 | 103.7 | 113.5 | 455.9 |
| 496 | 69.5 | 69.5 | 103.4 | 113.8 | 457.1 |
| 495 | 69.5 | 69.5 | 103.5 | 113.1 | 455.7 |
| 494 | 69.4 | 69.4 | 103.5 | 113.3 | 456.3 |
| 493 | 69.3 | 69.3 | 103.4 | 114.1 | 456.2 |
| 492 | 69.2 | 69.5 | 103.0 | 113.4 | 454.8 |
| 491 | 69.6 | 69.6 | 103.4 | 113.3 | 455.8 |
It is obvious from the table above that the die sinking termination position is accurate, reaches the precision of +/-1.5 mm deviation, and accords with the use standard of a manipulator.
in conclusion, the improved die opening hydraulic control system can be applied to research and development or modification design of an injection molding machine, and has the effects of stabilizing the die opening level and improving the accuracy of the die opening termination position.
The above description is only the preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should be included in the protection scope of the present invention as long as the present invention is achieved by any of the same or similar means.
Claims (5)
1. The utility model provides an injection molding machine die sinking hydraulic control system, includes die sinking hydro-cylinder (100), first oil circuit (200) of being connected with the pole chamber (110) of die sinking hydro-cylinder (100) and second oil circuit (300) of being connected with the no pole chamber (120) of die sinking hydro-cylinder (100), its characterized in that: the hydraulic control system is characterized by further comprising a first electro-hydraulic directional valve (400) and a second electro-hydraulic directional valve (500), wherein an A1 interface of the first electro-hydraulic directional valve (400) is connected with a P2 interface of a second oil way (300) and the second electro-hydraulic directional valve (500), a B1 interface is connected with the first oil way (200), a P1 interface is connected with a power oil source (P) through an oil supply way (210), a T1 interface is connected with a B2 interface of the second electro-hydraulic directional valve (500), an A2 interface and a T2 interface of the second electro-hydraulic directional valve (500) are connected with an oil tank (T), a first oil return way (310) is further connected between the second oil way (300) and the oil tank (T), and a switch valve (600) and a throttle valve (700) are installed on the first oil return way.
2. The hydraulic control system for mold opening of an injection molding machine according to claim 1, characterized in that: the switching valve (600) adopts a two-position four-way electromagnetic reversing valve, an A3 interface and a P3 interface of the switching valve are both connected with a first oil return oil way (310) on one side of a second oil way (300), and a B3 interface and a T3 interface of the switching valve are both connected with the first oil return oil way (310) on one side of an oil tank (T).
3. The hydraulic control system for mold opening of an injection molding machine according to claim 1, characterized in that: and the A2 interface and the T2 interface of the second electro-hydraulic directional valve (500) are connected to the oil tank (T) through a second oil return channel (320).
4. the hydraulic control system for mold opening of an injection molding machine according to any one of claims 1 to 3, characterized in that: the power of the first electro-hydraulic directional valve (400) and the second electro-hydraulic directional valve (500) utilizes the hydraulic power of the system.
5. The hydraulic control system for mold opening of an injection molding machine according to claim 4, wherein: and three-position four-way electromagnetic reversing valves (800) are arranged between the two ends of the first electro-hydraulic directional valve (400) and the second electro-hydraulic directional valve (500) and the power oil source (P) and the oil tank (T).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920142319.6U CN209738222U (en) | 2019-01-25 | 2019-01-25 | Die sinking hydraulic control system of injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920142319.6U CN209738222U (en) | 2019-01-25 | 2019-01-25 | Die sinking hydraulic control system of injection molding machine |
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| CN209738222U true CN209738222U (en) | 2019-12-06 |
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| CN201920142319.6U Active CN209738222U (en) | 2019-01-25 | 2019-01-25 | Die sinking hydraulic control system of injection molding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123725A (en) * | 2020-07-16 | 2020-12-25 | 浙江工业大学 | Injection molding machine die-casting electro-hydraulic system and control method thereof |
| CN115071082A (en) * | 2022-04-29 | 2022-09-20 | 宁波长飞亚塑料机械制造有限公司 | Micro-mold opening system for realizing correlation injection molding machine and control method thereof |
-
2019
- 2019-01-25 CN CN201920142319.6U patent/CN209738222U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123725A (en) * | 2020-07-16 | 2020-12-25 | 浙江工业大学 | Injection molding machine die-casting electro-hydraulic system and control method thereof |
| CN115071082A (en) * | 2022-04-29 | 2022-09-20 | 宁波长飞亚塑料机械制造有限公司 | Micro-mold opening system for realizing correlation injection molding machine and control method thereof |
| CN115071082B (en) * | 2022-04-29 | 2023-09-19 | 宁波长飞亚塑料机械制造有限公司 | Micro-die opening system for realizing correlation injection molding machine and control method thereof |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right | ||
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Effective date of registration: 20200903 Address after: 529728 Industrial West Zone, Gonghe Town, Jiangmen, Guangdong, Heshan Patentee after: GUANGDONG ZHUDE INDUSTRIAL Co.,Ltd. Address before: 528308 No. 3 Xingye Middle Road, Lun Jiao first industrial zone, Shunde District, Foshan, Guangdong. Patentee before: GUANGDONG TEKWELL INTELLIGENT EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210304 Address after: No.3, Xingye Middle Road, Lunjiao No.1 Industrial Zone, Shunde District, Foshan City, Guangdong Province, 528308 Patentee after: GUANGDONG TEKWELL INTELLIGENT EQUIPMENT Co.,Ltd. Address before: 529728 industrial West District, Gonghe Town, Heshan City, Jiangmen City, Guangdong Province Patentee before: GUANGDONG ZHUDE INDUSTRIAL Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
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Address after: Building F, 328 Gongjian Road, Gonghe Town, Heshan City, Jiangmen City, Guangdong Province 529700 Patentee after: GUANGDONG TEKWELL INTELLIGENT EQUIPMENT Co.,Ltd. Address before: No.3, Xingye Middle Road, Lunjiao No.1 Industrial Zone, Shunde District, Foshan City, Guangdong Province, 528308 Patentee before: GUANGDONG TEKWELL INTELLIGENT EQUIPMENT Co.,Ltd. |