CN201800214U - External control loop of injection molding machine with servo system - Google Patents
External control loop of injection molding machine with servo system Download PDFInfo
- Publication number
- CN201800214U CN201800214U CN2010205289104U CN201020528910U CN201800214U CN 201800214 U CN201800214 U CN 201800214U CN 2010205289104 U CN2010205289104 U CN 2010205289104U CN 201020528910 U CN201020528910 U CN 201020528910U CN 201800214 U CN201800214 U CN 201800214U
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- external control
- oil
- oil pump
- valve
- loop
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Abstract
The utility model discloses an external control loop of an injection molding machine with a servo system, which comprises a system work loop, an external control loop and an oil tank (1), wherein the external control loop comprises an external control oil pump (8) which is taken as an external control oil source; an oil outlet of the external control oil pump (8) is connected with one input port of a shuttle valve (10), an oil inlet of a bypass strainer (12) and an inlet of an external control oil pump relief valve (13); an oil inlet of the external control oil pump (8) is connected with the oil tank (1) through an oil inlet pipe; the oil outlets of the external control oil pump relief valve (13) and the bypass strainer (12) are connected with the oil tank (1); the oil outlet of the external control oil pump (8) is connected with a pressure gage (11); anther input port of the shuttle valve (10) is connected with the pressure end of the system work loop, namely, an oil outlet of a system oil pump (3); and an output port of the shuttle valve (10) is connected with elements needing to be controlled externally in the system.
Description
Technical field
The utility model relates to a kind of servo-drive system injection machine external control loop.
Background technology
Large-tonnage fluid pressure type injection machine, the general electro-hydraulic reversing valve or the inserted valve of big latus rectum of adopting controlled the action of machine, and the control fluid that all needs certain pressure under these two kinds of a lot of situations of valve could guarantee its operate as normal, in the Constant Pump System or variable plunger pump system that former asynchronous machine drives, because the two is to pressure controlled characteristics, even if hydraulic system all needs the base pressure that keeps certain during the machine attonity, therefore external control fluid can directly be taken from system, but this system energy consumption height, the production cost height; And in the hydraulic system of servomotor control, during the machine attonity, servomotor stops operating fully, and system can't continue to provide control fluid to relevant fuel tap again, can cause faults such as fuel tap stroke defect or low-response like this, leaning on into the servo-drive system injection machine can't operate as normal.
The utility model content
The technical problems to be solved in the utility model is, provides that a kind of energy consumption is low, production cost is low, the fuel tap response speed is fast, the reliable servo-drive system injection machine of system works external control loop.
For addressing the above problem, servo-drive system injection machine external control of the present utility model loop includes: the system works loop, external control loop and fuel tank, the system works loop comprises the system's oil pump by department's clothes motor-driven control, the oil-out of system's oil pump is connected on the working cell of servo-drive system injection machine, and on the oil-out of system's oil pump, be connected with Pressure gauge respectively, pressure sensor and system's overflow valve, the port of export of system's overflow valve is connected with fuel tank by pipeline, the oil-in of system's oil pump is connected with fuel tank by oil inlet pipe, and is provided with the fluid filter on oil inlet pipe; The external control loop includes an external control oil pump as the external control oil sources, be connected with one of them input port of shuttle valve, the oiler and the import of external control oil pump overflow valve of bypass strainer respectively on the oil-out of external control oil pump, its pressure is regulated by external control oil pump overflow valve; The oiler of external control oil pump is connected with fuel tank by going into oil pipe.The oil-out of external control oil pump overflow valve and bypass strainer is connected with fuel tank, and on the oil-out of external control oil pump, be connected to Pressure gauge, the another one input port of shuttle valve and the pressure end in system works loop are that the oil-out of system's oil pump is connected, the delivery outlet of shuttle valve then with in the system needs the element of external control (as electro-hydraulic reversing valve, servo valve, the control cover plate of inserted valve, safety valve) connect, provide these elements operate as normal under some occasion necessary control fluid.
Adopt servo-drive system injection machine external control of the present utility model loop, have that energy consumption is low, production cost is low, the fuel tap response speed is fast, the reliable advantage of system works.
Description of drawings
Fig. 1 is the structural representation in servo-drive system injection machine external control of the present utility model loop.
The specific embodiment
In conjunction with the accompanying drawings the utility model is described in further detail down.
As shown in Figure 1, servo-drive system injection machine external control of the present utility model loop includes: the system works loop, external control loop and fuel tank 1, the system works loop comprises the system's oil pump 3 that is driven control by servomotor 2, the oil-out of system's oil pump 3 is connected on the working cell of servo-drive system injection machine, and on the oil-out of system's oil pump 3, be connected with Pressure gauge 4 respectively, pressure sensor 5 and system's overflow valve 6, the port of export of system's overflow valve 6 is connected with fuel tank 1 by pipeline, the oil-in of system's oil pump 3 is connected with fuel tank 1 by oil inlet pipe, and is provided with fluid filter 7 on oil inlet pipe; The external control loop includes an external control oil pump 8 as the external control oil sources, and external control oil pump 8 is a float amount constant displacement pump, and it is driven by a common asynchronous moter 9; Be connected with one of them input port of shuttle valve 10, the oiler and 13 imports of external control oil pump overflow valve of bypass strainer 12 respectively on the oil-out of external control oil pump 8, its pressure is regulated by external control oil pump overflow valve 13; The oiler of external control oil pump 8 is connected with fuel tank 1 by going into oil pipe.The oil-out of external control oil pump overflow valve 13 and bypass strainer 12 is connected with fuel tank 1, and on the oil-out of external control oil pump 8, be connected to Pressure gauge 11, the another one input port of shuttle valve 10 and the pressure end in system works loop are that the oil-out of system's oil pump 3 is connected, the delivery outlet of shuttle valve 10 then with in the system needs the element of external control (as electro-hydraulic reversing valve, servo valve, the control cover plate of inserted valve, safety valve) connect, provide these elements operate as normal under some occasion necessary control fluid.
In the present embodiment, the use of shuttle valve is crucial.Because if directly supply with external control fluid by the external control oil pump separately, the setting meeting of its pressure size is difficulty quite, is provided with lowly, and when system acting requires high pressure, external control fluid will not have due effect; Be provided with too high, in the time of can causing system acting pressure low again the impact of fuel tap big, can cause the waste of energy simultaneously.In the present embodiment, two input ports of shuttle valve are connect the pressure end in external control oil pump and system works loop respectively, the overflow valve of external control oil pump is set up a lower pressure (0.5-1.0MPa), when system's attonity, control fluid is provided by the external control oil pump, guarantee that each valve can reliably cut out, thereby and respectively control oil pipe and be full of the sensitivity that fluid guarantees each fuel tap action; When system works pressure was higher than the pressure of external control oil pump, control fluid was provided by system, can guarantee that like this control fluid of enough pressure removes to control each fuel tap.Simultaneously, the oil-out of external control oil pump connects bypass strainer, allows the fluid of a part pass through the bypass strainer oil sump tank, makes full use of energy, guarantees the cleaning of fluid simultaneously.Set pressure owing to the external control oil pump is very low in addition, so energy consumption is very low.
Claims (1)
1. servo-drive system injection machine external control loop, include: the system works loop, external control loop and fuel tank (1), the system works loop comprises the system's oil pump (3) that is driven control by department's clothes motors (2), the oil-out of system's oil pump (3) is connected on the working cell of servo-drive system injection machine, it is characterized in that: described external control loop includes one as the external control oil pump (8) of external control oil sources, on the oil-out of external control oil pump (8) respectively with one of them input port of shuttle valve (10), the import of the oiler of bypass strainer (12) and external control oil pump overflow valve (13) connects; The oiler of external control oil pump (8) is connected with fuel tank (1) by going into oil pipe; The oil-out of external control oil pump overflow valve (13) and bypass strainer (12) is connected with fuel tank (1), the another one input port of shuttle valve (10) and the pressure end in system works loop are that the oil-out of system's oil pump (3) is connected, the delivery outlet of shuttle valve (10) then with in the system needs the element of external control (as electro-hydraulic reversing valve, servo valve, the control cover plate of inserted valve, safety valve) connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205289104U CN201800214U (en) | 2010-09-15 | 2010-09-15 | External control loop of injection molding machine with servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205289104U CN201800214U (en) | 2010-09-15 | 2010-09-15 | External control loop of injection molding machine with servo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201800214U true CN201800214U (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205289104U Expired - Fee Related CN201800214U (en) | 2010-09-15 | 2010-09-15 | External control loop of injection molding machine with servo system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201800214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235392A (en) * | 2011-05-20 | 2011-11-09 | 上海光塑机械制造有限公司 | Control device for pilot oil of cartridge valve |
| CN112659505A (en) * | 2020-12-23 | 2021-04-16 | 富强鑫(宁波)精密科技股份有限公司 | Hydraulic circuit of injection molding machine and control method |
-
2010
- 2010-09-15 CN CN2010205289104U patent/CN201800214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235392A (en) * | 2011-05-20 | 2011-11-09 | 上海光塑机械制造有限公司 | Control device for pilot oil of cartridge valve |
| CN112659505A (en) * | 2020-12-23 | 2021-04-16 | 富强鑫(宁波)精密科技股份有限公司 | Hydraulic circuit of injection molding machine and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20140915 |
|
| EXPY | Termination of patent right or utility model |