CN202764155U - Servo valve control injection oil path system of large injection molding machine - Google Patents
Servo valve control injection oil path system of large injection molding machine Download PDFInfo
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- CN202764155U CN202764155U CN 201220026586 CN201220026586U CN202764155U CN 202764155 U CN202764155 U CN 202764155U CN 201220026586 CN201220026586 CN 201220026586 CN 201220026586 U CN201220026586 U CN 201220026586U CN 202764155 U CN202764155 U CN 202764155U
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- valve
- injection
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- servo valve
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Abstract
The utility model relates to a servo valve control injection oil path system of a large injection molding machine. According to the technical scheme provided by the utility model, the servo valve control injection oil path system mainly comprises an injection oil cylinder, a pressure sensor, a closed-loop control servo valve, a one-way valve, a high-pressure filter, an inserting valve, a reversing valve, a melting motor and a passing pipeline which are connected. An oil path is compact and simple in structure. Through the injection oil path system, the closed-loop injection control and the closed-loop melting backpressure control can be achieved, the servo valve is quick in response, the repeated position control precision is high and reaches 0.1 mm, the shape and size control precision of products is improved, and the waste of high weight of single product is avoided.
Description
Technical field
The utility model relates to a kind of servo valve control oil system of injection of large size plastic jetting-moulding device.
Background technology
The closed loop injection structure of injection machine, what routine adopted is subbase mounted servo valve, and this servo valve maximum diameter only has the D35 latus rectum, be only applicable to medium and small type injection machine, commonly used also is in the D25 latus rectum, and the board-like servo valve cost of D35 latus rectum is very expensive, and it is large to take up room, so that it is very large that oily making sheet design needs, the inflow-rate of water turbine of valve is again little simultaneously.And the injection machine dynamical system flow of large scale computer is quite large, and the inflow-rate of water turbine of original board-like servo valve can't meet the demands at all.To such an extent as to be badly in need of exploring the oil system of injection of large flow servo injection control.
Summary of the invention
The utility model to solve Shortcomings in the prior art technical problem: for the large size plastic jetting-moulding device of large flow servo injection control provides a kind of oil channel structures compact, simple, realize simultaneously closed-loop control injection and smelting glue back pressure, reduction cost and improve the oil system of injection of injection control accuracy.
The utility model provides the technical scheme that overcomes Shortcomings in the prior art: a kind of servo valve control oil system of injection of large size plastic jetting-moulding device, and its main it comprises injection cylinder (1), pressure sensor (2), servo valve (3), the solenoid directional control valve that the injection oil return is used (4), check valve (5), high pressure filter (6), the inserted valve that the injection oil return is used (7), the inserted valve that melten gel is used (8), pine moves back the inserted valve (9) of usefulness, the solenoid directional control valve that melten gel is used (10), pine moves back the solenoid directional control valve (11) of usefulness, melten gel motor (12) reaches and is formed by connecting by pipeline; The oil inlet end of system links by P mouth and the inserted valve (8) that melten gel is used and the A chamber that pine moves back the inserted valve (9) of usefulness of pipeline and servo valve (3), the A mouth of servo valve (3) directly is connected with the injecting cavity of injection cylinder (1), the T mouth of servo valve (3) communicates with oil return, and pressure sensor (2) directly is contained in the injecting cavity of injection cylinder (1); The pine that the B mouth of the inserted valve that the injection oil return is used (7) connects injection cylinder (1) moves back the chamber, and the A mouth communicates with oil return; The B mouth of the inserted valve that melten gel is used (8) directly is connected with the oil-in of melten gel motor (12), and the T mouth of melten gel motor (12) communicates with oil return; The B mouth that pine moves back the inserted valve (9) of usefulness moves back the chamber with the pine of injection cylinder (1) and is connected; The B mouth of check valve (5) connects the control oil pocket of servo valve (3), and the outlet of the A mouth of check valve (5) and high pressure filter (6) links, and the oil-in of high pressure filter (6) communicates with oil-feed; The solenoid directional control valve that the injection oil return is used (4) is contained on the control cover plate of the inserted valve (7) that the injection oil return uses, the solenoid directional control valve that melten gel is used (10) is contained on the control cover plate of the inserted valve (8) that melten gel uses, and the solenoid directional control valve (11) that pine moves back usefulness is contained on the control cover plate of the inserted valve (9) that pine moves back usefulness.
Described servo valve (3) is threeway plug-in servo valve, this servo valve energy closed-loop control injection and smelting glue back pressure; Described check valve (5) is contained on the external control liquefaction chamber of servo valve (3); Described high pressure filter (6) is the high-pressure and high-precision filter, is furnished with simultaneously the clogging automatic alarm device, is contained on the external control liquefaction chamber of servo valve (3), and controls oil and pass through first high pressure filter, then just passes through check valve (5); The inserted valve (7) that described injection oil return is used, the inserted valve (8) that melten gel is used are the reversing inserted valve with the inserted valve (9) that pine moves back usefulness; The solenoid directional control valve (4) that described injection oil return is used, the solenoid directional control valve (10) that melten gel is used are inserted valve corresponding to independent control with the solenoid directional control valve (11) that pine moves back usefulness.
Description of drawings
Fig. 1 is the servo valve control injection asphalt principle figure of a kind of large size plastic jetting-moulding device of the present utility model.
The inserted valve that the solenoid directional control valve that 1-injection cylinder, 2-pressure sensor, 3-servo valve, the oil return of 4-injection are used among the figure, 5-check valve, 6-high pressure filter, the oil return of 7-injection are used, the inserted valve that the 8-melten gel is used, the inserted valve that the 9-pine moves back usefulness, the solenoid directional control valve that the 10-melten gel is used, solenoid directional control valve, the 12-melten gel motor that the 11-pine moves back usefulness.
The specific embodiment
As shown in Figure 1, a kind of servo valve control oil system of injection of large size plastic jetting-moulding device, the inserted valve (7) that its main it solenoid directional control valve (4), check valve (5), high pressure filter (6), injection oil return that comprises that injection cylinder (1), pressure sensor (2), servo valve (3), injection oil return are used is used, the inserted valve (8) that melten gel is used, the inserted valve (9) that pine moves back usefulness, the solenoid directional control valve (10) that melten gel is used, solenoid directional control valve (11), the melten gel motor (12) that pine moves back usefulness; Described servo valve (3) is threeway plug-in servo valve, this servo valve energy closed-loop control injection and smelting glue back pressure; Described check valve (5) is contained on the external control liquefaction chamber of servo valve (3); Described high pressure filter (6) is the high-pressure and high-precision filter, is furnished with simultaneously the clogging automatic alarm device, is contained on the external control liquefaction chamber of servo valve (3), and controls oil and pass through first high pressure filter, then just passes through check valve (5); The inserted valve (7) that described injection oil return is used, the inserted valve (8) that melten gel is used are the reversing inserted valve with the inserted valve (9) that pine moves back usefulness; The solenoid directional control valve (4) that described injection oil return is used, the solenoid directional control valve (10) that melten gel is used are inserted valve corresponding to independent control with the solenoid directional control valve (11) that pine moves back usefulness.
Operation principle
The servo valve control oil system of injection of a kind of large size plastic jetting-moulding device of the present utility model, its operation principle is:
As shown in Figure 1: when action of injection, hydraulic oil is through the P mouth of servo valve (3), enter the oil suction chamber of injection cylinder (1) by the A mouth, and the A mouth oil sump tank of the inserted valve (7) that the loose hydraulic oil that moves back the chamber is used by the injection oil return, pass through simultaneously the pressure feedback of pressure sensor (2), servo valve is controlled, thereby realizes the injection closed-loop control; When loose deactuate was done, hydraulic oil moved back the chamber through the pine that the loose B mouth that moves back the inserted valve (9) of usefulness enters injection cylinder (1), and the hydraulic oil of injecting cavity is by the T mouth oil sump tank of servo valve (3); When melten gel moves, the B mouth of the inserted valve (8) that hydraulic oil process melten gel is used enters into the P mouth of melten gel motor, and the direct oil sump tank of melten gel oil return, the oil sump tank speed of simultaneously servo valve (3) control injecting cavity hydraulic oil, pressure feedback by pressure sensor (2), servo valve is controlled, thereby realizes the smelting glue back pressure closed-loop control.
Claims (2)
1. the servo valve control oil system of injection of a large size plastic jetting-moulding device, the inserted valve (7) that it solenoid directional control valve (4), check valve (5), high pressure filter (6), injection oil return that comprises that injection cylinder (1), pressure sensor (2), servo valve (3), injection oil return are used is used, the inserted valve (8) that melten gel is used, inserted valve (9) that pine moves back usefulness, solenoid directional control valve (10) that melten gel is used, solenoid directional control valve (11), melten gel motor (12) that pine moves back usefulness and be formed by connecting by pipeline; It is characterized in that: the oil inlet end of system links by P mouth and the inserted valve (8) that melten gel is used and the A chamber that pine moves back the inserted valve (9) of usefulness of pipeline and servo valve (3), the A mouth of servo valve (3) directly is connected with the injecting cavity of injection cylinder (1), the T mouth of servo valve (3) communicates with oil return, and pressure sensor (2) directly is contained in the injecting cavity of injection cylinder (1); The pine that the B mouth of the inserted valve that the injection oil return is used (7) connects injection cylinder (1) moves back the chamber, and the A mouth communicates with oil return; The B mouth of the inserted valve that melten gel is used (8) directly is connected with the oil-in of melten gel motor (12), and the T mouth of melten gel motor (12) communicates with oil return; The B mouth that pine moves back the inserted valve (9) of usefulness moves back the chamber with the pine of injection cylinder (1) and is connected; The B mouth of check valve (5) connects the control oil pocket of servo valve (3), and the outlet of the A mouth of check valve (5) and high pressure filter (6) links, and the oil-in of high pressure filter (6) communicates with oil-feed; The solenoid directional control valve that the injection oil return is used (4) is contained on the control cover plate of the inserted valve (7) that the injection oil return uses, the solenoid directional control valve that melten gel is used (10) is contained on the control cover plate of the inserted valve (8) that melten gel uses, and the solenoid directional control valve (11) that pine moves back usefulness is contained on the control cover plate of the inserted valve (9) that pine moves back usefulness.
2. the servo valve control oil system of injection of a kind of large size plastic jetting-moulding device as claimed in claim 1, it is characterized in that: described servo valve (3) is threeway plug-in servo valve, this servo valve can closed-loop control injection and smelting glue back pressure; Described check valve (5) is contained on the external control liquefaction chamber of servo valve (3); Described high pressure filter (6) is the high-pressure and high-precision filter, is furnished with simultaneously the clogging automatic alarm device, is contained on the external control liquefaction chamber of servo valve (3), and controls oil and pass through first high pressure filter, then just passes through check valve (5); The inserted valve (7) that described injection oil return is used, the inserted valve (8) that melten gel is used are the reversing inserted valve with the inserted valve (9) that pine moves back usefulness; The solenoid directional control valve (4) that described injection oil return is used, the solenoid directional control valve (10) that melten gel is used are inserted valve corresponding to independent control with the solenoid directional control valve (11) that pine moves back usefulness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220026586 CN202764155U (en) | 2012-01-11 | 2012-01-11 | Servo valve control injection oil path system of large injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220026586 CN202764155U (en) | 2012-01-11 | 2012-01-11 | Servo valve control injection oil path system of large injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202764155U true CN202764155U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220026586 Expired - Fee Related CN202764155U (en) | 2012-01-11 | 2012-01-11 | Servo valve control injection oil path system of large injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202764155U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476234A (en) * | 2015-08-25 | 2017-03-08 | 宁波优诺姆机械有限公司 | A kind of hydraulic circuit structure |
| CN111559060A (en) * | 2020-05-20 | 2020-08-21 | 宁波华美达机械制造有限公司 | Zero back pressure injection oil piping system |
| CN113843996A (en) * | 2021-10-28 | 2021-12-28 | 佛山市宝捷精密机械有限公司 | High-response injection hydraulic circuit of injection molding machine and pilot control method |
-
2012
- 2012-01-11 CN CN 201220026586 patent/CN202764155U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476234A (en) * | 2015-08-25 | 2017-03-08 | 宁波优诺姆机械有限公司 | A kind of hydraulic circuit structure |
| CN111559060A (en) * | 2020-05-20 | 2020-08-21 | 宁波华美达机械制造有限公司 | Zero back pressure injection oil piping system |
| CN113843996A (en) * | 2021-10-28 | 2021-12-28 | 佛山市宝捷精密机械有限公司 | High-response injection hydraulic circuit of injection molding machine and pilot control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20140111 |