CN202668939U - Mold locking circuit for injection mold machine - Google Patents
Mold locking circuit for injection mold machine Download PDFInfo
- Publication number
- CN202668939U CN202668939U CN 201220399820 CN201220399820U CN202668939U CN 202668939 U CN202668939 U CN 202668939U CN 201220399820 CN201220399820 CN 201220399820 CN 201220399820 U CN201220399820 U CN 201220399820U CN 202668939 U CN202668939 U CN 202668939U
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- China
- Prior art keywords
- oil
- valve
- controlled check
- pilot controlled
- hydraulic control
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- Expired - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model provides a mold locking circuit for an injection mold machine, which comprises an oil tank, a mold assembly oil cylinder, a three-position reversal valve, a first pilot controlled check valve, a second pilot controlled check valve and an oil pump, wherein the mold assembly oil cylinder is provided with a back cavity and a front cavity separated by a piston; a high-pressure oil outlet of the oil pump is communicated with an oil inlet of the first pilot controlled check valve through the three-position reversal valve; an oil outlet of the first pilot controlled check valve is connected with the back cavity of the mold assembly oil cylinder; the front cavity of the mold assembly oil cylinder is connected with an oil outlet of the second pilot controlled check valve; and an oil inlet of the second pilot controlled check valve is communicated with the oil tank through the three-position reversal valve. According to the mold locking circuit for the injection mold machine, each pilot controlled check valve is mounted at each of two oil ports of the mold assembly oil cylinder; when the reversal valve is in a middle position, controlling oil of the two pilot controlled check valves is communicated with the oil tank directly, so that the controlling pressure disappears immediately; the pilot controlled check valves are not communicated reversely; a hydraulic cylinder is locked as the oil in the two cavities is sealed; in addition, the pump is unloaded; the pilot controlled check valves are good in reversal sealability; and the locking is reliable.
Description
Technical field
The utility model relates to a kind of injection moulding machine mode-locking loop.
Background technology
Injection machine be with the particular plastics heat fused to flow regime, inject die cavity with high-voltage high-speed, can be used to make complex contour, size accurately or with the plastic products of metal insert.In use find: when carrying out slow injection, the mould distending produces gap, thereby causes plastic products to produce " limit of overflowing " phenomenon.Injection machine is in injection process, and molten plastic often injects die cavity with the high pressure of 4～15MPa, and this just requires clamping to have enough large mold clamping force, fits tightly to guarantee moving platen and solid plate.For this reason, in the situation of the oversize and hypertonia that does not make the closing liquid cylinder pressure, adopt hydraulic pressure one mechanical booster clamping to realize matched moulds and locked mode.Drive the closing cylinder of dynamic model piece motion after finishing the matched moulds process, utilize the locking loop that fluid is carried out locking, make mould under the synergy of oil liquid pressure and linkage, realize locked mode.The kind in locking loop has multiple, the most simply is the locking loop of adopting such as common three position directional valve Median Function 0 type, but because the internal leakage between spool and the valve body, locking effect is relatively poor.
The utility model content
The technical problem that (one) will solve
The technical problems to be solved in the utility model provides the stable injection moulding machine mode-locking loop of a kind of locked mode.
(2) technical scheme
For solving the problems of the technologies described above; the utility model provides a kind of injection moulding machine mode-locking loop; comprise fuel tank; also comprise die cylinder 1; three position directional valve 4; the first hydraulic control one-way valve 2; the second hydraulic control one-way valve 3 and oil pump 6; described die cylinder 1 has back cavity 11 and the ante-chamber 12 that is divided into by piston; the high pressure oil-out of described oil pump 6 connects the first oil-in D2 of described three position directional valve 4; the first oil-out C2 of described three position directional valve 4 connects the oil-in B2 of described the first hydraulic control one-way valve 2; the oil-out A2 of described the first hydraulic control one-way valve 2 connects the oil-in of described back cavity 11; the oil-in of described ante-chamber 12 connects the oil-out A1 of described the second hydraulic control one-way valve 3; the oil-in B1 of described the second hydraulic control one-way valve 3 connects the second oil-out C1 of described three position directional valve 4, and the second oil-in D1 of described three position directional valve 4 connects described fuel tank.
Further, described three position directional valve 4 is the 3-position 4-way solenoid directional control valve.
(3) beneficial effect
The utility model injection moulding machine mode-locking loop; two oil ports at die cylinder are respectively installed a hydraulic control one-way valve; when reversal valve place meta; the control oil of two hydraulic control one-way valves is logical fuel tank directly, therefore controlled pressure disappears immediately, hydraulic control one-way valve is reverse-conducting no longer; hydraulic cylinder closes because of the two cavity oil fluid-tight and is locked; make simultaneously the pump off-load, the reverse good airproof performance of hydraulic control one-way valve, so reliable lock.
Description of drawings
Fig. 1 is the connection diagram in the utility model injection moulding machine mode-locking loop.
The specific embodiment
Consult Fig. 1; the utility model provides a kind of injection moulding machine mode-locking loop; comprise fuel tank; also comprise die cylinder 1; three position directional valve 4; the first hydraulic control one-way valve 2; the second hydraulic control one-way valve 3 and oil pump 6; die cylinder 1 has back cavity 11 and the ante-chamber 12 that is divided into by piston; the high pressure oil-out of oil pump 6 connects the first oil-in D2 of three position directional valve 4; the first oil-out C2 of three position directional valve 4 connects the oil-in B2 of the first hydraulic control one-way valve 2; the oil-out A2 of the first hydraulic control one-way valve 2 connects the oil-in of back cavity 11; the oil-in of ante-chamber 12 connects the oil-out A1 of the second hydraulic control one-way valve 3; the oil-in B1 of the second hydraulic control one-way valve 3 connects the second oil-out C1 of three position directional valve 4, and the second oil-in D1 of three position directional valve 4 connects described fuel tank.In the present embodiment, three position directional valve 4 adopts the 3-position 4-way solenoid directional control valve of H type for Median Function.Add an overflow valve 5 at three position directional valve 4 oil return opening places and play the back pressure effect.The utility model injection moulding machine mode-locking loop; two oil ports at die cylinder are respectively installed a hydraulic control one-way valve; when reversal valve place meta, because the employing of reversal valve Median Function is the H type, the control oil of two hydraulic control one-way valves is logical fuel tank directly; therefore controlled pressure disappears immediately; hydraulic control one-way valve is reverse-conducting no longer, and hydraulic cylinder closes because of the two cavity oil fluid-tight and is locked, and makes simultaneously the pump off-load; the reverse good airproof performance of hydraulic control one-way valve, so reliable lock
The above only is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (2)
1. injection moulding machine mode-locking loop; comprise fuel tank; it is characterized in that: also comprise die cylinder (1); three position directional valve (4); the first hydraulic control one-way valve (2); the second hydraulic control one-way valve (3) and oil pump (6); described die cylinder (1) has back cavity (11) and the ante-chamber (12) that is divided into by piston; the high pressure oil-out of described oil pump (6) connects first oil-in (D2) of described three position directional valve (4); first oil-out (C2) of described three position directional valve (4) connects the oil-in (B2) of described the first hydraulic control one-way valve (2); the oil-out (A2) of described the first hydraulic control one-way valve (2) connects the oil-in of described back cavity (11); the oil-in of described ante-chamber (12) connects the oil-out (A1) of described the second hydraulic control one-way valve (3); the oil-in (B1) of described the second hydraulic control one-way valve (3) connects second oil-out (C1) of described three position directional valve (4), and second oil-in (D1) of described three position directional valve (4) connects described fuel tank.
2. injection moulding machine mode-locking as claimed in claim 1 loop, it is characterized in that: described three position directional valve (4) is the 3-position 4-way solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220399820 CN202668939U (en) | 2012-08-13 | 2012-08-13 | Mold locking circuit for injection mold machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220399820 CN202668939U (en) | 2012-08-13 | 2012-08-13 | Mold locking circuit for injection mold machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202668939U true CN202668939U (en) | 2013-01-16 |
Family
ID=47489870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220399820 Expired - Fee Related CN202668939U (en) | 2012-08-13 | 2012-08-13 | Mold locking circuit for injection mold machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202668939U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573751A (en) * | 2013-11-21 | 2014-02-12 | 无锡市蓝力机床有限公司 | Locking circuit for vertically arranged oil cylinder lower cavity of hydraulic machine |
| CN104712607A (en) * | 2015-01-29 | 2015-06-17 | 成都绿迪科技有限公司 | Hydraulic control system of rubber sealing strip corner connecting machine |
| CN105538624A (en) * | 2016-01-25 | 2016-05-04 | 海天塑机集团有限公司 | Mould clamping system for injection molding machine and oil way control method for mould clamping system for injection molding machine |
| CN107859665A (en) * | 2017-11-24 | 2018-03-30 | *** | A kind of fluid control pressure valve group |
-
2012
- 2012-08-13 CN CN 201220399820 patent/CN202668939U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573751A (en) * | 2013-11-21 | 2014-02-12 | 无锡市蓝力机床有限公司 | Locking circuit for vertically arranged oil cylinder lower cavity of hydraulic machine |
| CN104712607A (en) * | 2015-01-29 | 2015-06-17 | 成都绿迪科技有限公司 | Hydraulic control system of rubber sealing strip corner connecting machine |
| CN105538624A (en) * | 2016-01-25 | 2016-05-04 | 海天塑机集团有限公司 | Mould clamping system for injection molding machine and oil way control method for mould clamping system for injection molding machine |
| CN107859665A (en) * | 2017-11-24 | 2018-03-30 | *** | A kind of fluid control pressure valve group |
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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: 20130116 Termination date: 20150813 |
|
| EXPY | Termination of patent right or utility model |