CN203543048U - Mold opening and closing backpressure circuit for injection molding machine clamping mechanism - Google Patents
Mold opening and closing backpressure circuit for injection molding machine clamping mechanism Download PDFInfo
- Publication number
- CN203543048U CN203543048U CN201320626564.7U CN201320626564U CN203543048U CN 203543048 U CN203543048 U CN 203543048U CN 201320626564 U CN201320626564 U CN 201320626564U CN 203543048 U CN203543048 U CN 203543048U
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- China
- Prior art keywords
- valve
- closing
- mold opening
- folding mould
- backpressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 10
- 239000002828 fuel tank Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a mold opening and closing backpressure circuit for an injection molding machine clamping mechanism. The mold opening and closing backpressure circuit comprises a hydraulic cylinder, a mold opening and closing valve and an oil tank, wherein a rod cavity and a rodless cavity in the hydraulic cylinder are respectively communicated with a working port in the mold opening and closing valve. The mold opening and closing backpressure circuit is characterized by also comprising a mold opening and closing backpressure changeover valve, a mold opening overflow valve and a mold closing overflow valve, wherein a pressure oil port of the mold opening and closing backpressure changeover valve is communicated with an oil return opening of the mold opening and closing valve; one end of the mold opening overflow valve and one end of the mold closing overflow valve are respectively communicated with the working port of the mold opening and closing backpressure changeover valve; an oil return opening of the mold opening and closing backpressure changeover valve is communicated with the oil tank; the other end of the mold opening overflow valve and the other end of the mold closing overflow valve are respectively communicated with the oil tank. The mold opening and closing backpressure circuit has the advantages that a backpressure loop is additionally arranged to control the mold opening and closing, and inertia force generated by a mobile template in the mold opening and closing processes is counteracted, so that the mold opening and closing speeds are stable, movement is stable, the mold opening and closing overshoot can be reduced, and the mold opening and closing positions are more accurate.
Description
Technical field
The utility model relates to the hydraulic control system in injection machine, relates in particular to a kind of folding mould backpressure circuit for injection molding machine mold clamping mechanism.
Background technology
At present; the clamping mechanism of a lot of injection machines adopts hydraulic system to control opening/closing of mould; and stop the stopping time at HYDRAULIC CONTROL SYSTEM folding mould; and in high speed processes, end suddenly or during power-off, moving die plate all can produce very large inertia, makes frame shake severe; folding mould moves unstable; and the speed of folding mould is also unstable, and can produce the overshoot of folding mould, cause folding mould position inaccuracy.
Summary of the invention
Technical problem to be solved in the utility model is to provide the stable folding mould backpressure circuit for injection molding machine mold clamping mechanism of a kind of folding mould.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of folding mould backpressure circuit for injection molding machine mold clamping mechanism, comprise hydraulic cylinder, folding mould valve, folding mould back pressure transfer valve, die sinking overflow valve, matched moulds overflow valve and fuel tank, rod chamber in described hydraulic cylinder and rodless cavity are communicated with the actuator port in described folding mould valve respectively, the pressure hydraulic fluid port of described folding mould back pressure transfer valve is connected with the oil return opening of described folding mould valve, one end of one end of described die sinking overflow valve and described matched moulds overflow valve is connected with the actuator port of described folding mould back pressure transfer valve respectively, the oil return opening of described folding mould back pressure transfer valve is connected with described fuel tank, the other end of the other end of described die sinking overflow valve and described matched moulds overflow valve is connected with described fuel tank respectively.
Between the oil return opening of described folding mould valve and the pressure hydraulic fluid port of described folding mould back pressure transfer valve, be serially connected with pressure valve, described pressure valve is connected with described fuel tank, and the other end of the other end of described die sinking overflow valve and described matched moulds overflow valve is connected with described pressure valve respectively.
Compared with prior art, the utility model has the advantages that by increase this backpressure circuit in hydraulic control system and control folding mould, offset the inertia force that moving die plate produces when folding mould, make the velocity-stabilization of folding mould, mobile stable, and can reduce folding mould overshoot, make the position of folding mould more accurate.
Accompanying drawing explanation
Fig. 1 is the oil circuit schematic diagram of the utility model embodiment mono-;
Fig. 2 is the oil circuit schematic diagram of the utility model embodiment bis-.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
Embodiment mono-: as shown in the figure, a kind of folding mould backpressure circuit for injection molding machine mold clamping mechanism, comprise hydraulic cylinder 1, folding mould valve 2, folding mould back pressure transfer valve 5, die sinking overflow valve 6, matched moulds overflow valve 7 and fuel tank 4, rod chamber MO in hydraulic cylinder 1 and rodless cavity MC respectively with folding mould valve 2 in actuator port A, B is communicated with, the pressure hydraulic fluid port P of folding mould back pressure transfer valve 5 is connected with the oil return inlet T of folding mould valve 2, one end of one end of die sinking overflow valve 6 and matched moulds overflow valve 7 respectively with the actuator port A of folding mould back pressure transfer valve 5, B is connected, the oil return inlet T of folding mould back pressure transfer valve 5 is connected with fuel tank 4, the other end of the other end of die sinking overflow valve 6 and matched moulds overflow valve 7 is connected with fuel tank 4 respectively.
In above-described embodiment, the course of work of this folding mould backpressure circuit is: during die sinking, fluid flows in the rod chamber MO of hydraulic cylinder 1, now, the PB of folding mould valve 2 is logical, AT is logical, and the oil return inlet T of folding mould valve 2 is through folding mould back pressure transfer valve 5, die sinking overflow valve 6 and matched moulds overflow valve 7 oil return casees 4, when folding mould back pressure transfer valve 5 is not opened, the spool of folding mould back pressure transfer valve 5 is locked, when the left end of folding mould back pressure transfer valve 5 obtains electricly, by die sinking overflow valve 6, produces back pressure oil return casees; And matched moulds is identical with the operation principle of die sinking, obtaining of folding mould back pressure transfer valve 5 is electric contrary.
Embodiment bis-: as shown in the figure, a kind of folding mould backpressure circuit for injection molding machine mold clamping mechanism, comprise hydraulic cylinder 1, folding mould valve 2, pressure valve 3, fuel tank 4, folding mould back pressure transfer valve 5, die sinking overflow valve 6 and matched moulds overflow valve 7, rod chamber MO in hydraulic cylinder 1 and rodless cavity MC respectively with folding mould valve 2 in actuator port A, B is communicated with, the oil return inlet T of folding mould valve 2 is connected with pressure valve 3, pressure valve 3 is connected with fuel tank 4, the pressure hydraulic fluid port P of folding mould back pressure transfer valve 5 is connected with pressure valve 3, die sinking overflow valve 6 and matched moulds overflow valve 7 respectively with the actuator port A of folding mould back pressure transfer valve 5, B is connected, the oil return inlet T of folding mould back pressure transfer valve 5 is connected with fuel tank 4, die sinking overflow valve 6 and matched moulds overflow valve 7 are connected with pressure valve 3 respectively.
In above-described embodiment, the course of work of this folding mould backpressure circuit is: during die sinking, fluid flows in the rod chamber MO of hydraulic cylinder 1, now, the PB of folding mould valve 2 is logical, AT is logical, and the oil return inlet T of folding mould valve 2 is through pressure valve 3 oil return casees 4, when folding mould back pressure transfer valve 5 is not opened, the spool of pressure valve 3 is locked, and when the left end of folding mould back pressure transfer valve 5 obtains electricly, the pilot pressure of pressure valve 3 produces back pressure oil return casees by die sinking overflow valve 6; And matched moulds is identical with the operation principle of die sinking, obtaining of folding mould back pressure transfer valve 5 is electric contrary.
Claims (2)
1. the folding mould backpressure circuit for injection molding machine mold clamping mechanism, comprise hydraulic cylinder, folding mould valve and fuel tank, rod chamber in described hydraulic cylinder and rodless cavity are communicated with the actuator port in described folding mould valve respectively, it is characterized in that being also provided with folding mould back pressure transfer valve, die sinking overflow valve and matched moulds overflow valve, the pressure hydraulic fluid port of described folding mould back pressure transfer valve is connected with the oil return opening of described folding mould valve, one end of one end of described die sinking overflow valve and described matched moulds overflow valve is connected with the actuator port of described folding mould back pressure transfer valve respectively, the oil return opening of described folding mould back pressure transfer valve is connected with described fuel tank, the other end of the other end of described die sinking overflow valve and described matched moulds overflow valve is connected with described fuel tank respectively.
2. a kind of folding mould backpressure circuit for injection molding machine mold clamping mechanism as claimed in claim 1; between the pressure hydraulic fluid port of the oil return opening of the folding mould valve described in it is characterized in that and described folding mould back pressure transfer valve, be serially connected with pressure valve; described pressure valve is connected with described fuel tank, and the other end of the other end of described die sinking overflow valve and described matched moulds overflow valve is connected with described pressure valve respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626564.7U CN203543048U (en) | 2013-10-11 | 2013-10-11 | Mold opening and closing backpressure circuit for injection molding machine clamping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626564.7U CN203543048U (en) | 2013-10-11 | 2013-10-11 | Mold opening and closing backpressure circuit for injection molding machine clamping mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203543048U true CN203543048U (en) | 2014-04-16 |
Family
ID=50461214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320626564.7U Expired - Lifetime CN203543048U (en) | 2013-10-11 | 2013-10-11 | Mold opening and closing backpressure circuit for injection molding machine clamping mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203543048U (en) |
-
2013
- 2013-10-11 CN CN201320626564.7U patent/CN203543048U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315821 Jiangnan export processing trade zone, Beilun District, Ningbo City, Zhejiang Province Patentee after: Bole Intelligent Equipment Co.,Ltd. Address before: 315821 Jiangnan export processing trade zone, Beilun District, Ningbo City, Zhejiang Province Patentee before: NINGBO SHUANGMA MACHINERY INDUSTRY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 337000 Qingyuan Industrial Park, Anyuan Industrial Park, Anyuan District, Pingxiang City, Jiangxi Province Patentee after: Bole Intelligent Equipment Co.,Ltd. Address before: 315821 Jiangnan export processing trade zone, Beilun District, Ningbo City, Zhejiang Province Patentee before: Bole Intelligent Equipment Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
|
| CX01 | Expiry of patent term |