CN202357400U - Open-close die hydraulic loop of injection molding machine - Google Patents
Open-close die hydraulic loop of injection molding machine Download PDFInfo
- Publication number
- CN202357400U CN202357400U CN2011205049919U CN201120504991U CN202357400U CN 202357400 U CN202357400 U CN 202357400U CN 2011205049919 U CN2011205049919 U CN 2011205049919U CN 201120504991 U CN201120504991 U CN 201120504991U CN 202357400 U CN202357400 U CN 202357400U
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- China
- Prior art keywords
- valve
- open
- close die
- folding mould
- safety
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- Expired - Lifetime
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Abstract
The utility model discloses an open-close die hydraulic loop of an injection molding machine. The open-close die hydraulic loop comprises an open-close die directional valve, a close die safety valve with detection, a hydraulic oil cylinder, a proportional throttle valve and an open-close die oil returning valve; wherein the hydraulic safety valve is connected with the proportional throttle valve in parallel and then is communicated with a die-closing cavity of the hydraulic oil cylinder; the safety valve oil inlet cavity is connected with a working cavity of the open-close die valve, an oil inlet cavity of the proportional throttle valve is connected with an oil returning cavity of the open-close die cavity; the safety valve is interlocked with the safety door; when the power is failed in the process of opening the door, the connection between the open-close die valve and the oil cylinder die closing cavity is cut off. The open-close die hydraulic loop of the injection molding machine is high in precision, good in stability and appropriate in price.
Description
Technical field
The utility model relates to the folding mould hydraulic circuit of injection machine.
Background technology
Present domestic injection machine folding mould hydraulic pressure main valve uses two kinds on conventional direction valve and proportion directional valve usually.Have for conventional direction valve folding mould advantage: low price; Shortcoming has: 1) can only be used in and split the less demanding operating mode of closing precision.2) the differential commentaries on classics low pressure molding of matched moulds is protected and is impacted greatly.3) die sinking stationarity is poor.For proportion directional valve folding mould advantage: 1) die sinking precision and repeatable accuracy are high.2) the folding mold process is steady.Shortcoming has: price is high.
Along with to the improving constantly of product required precision, the injection machine of many conventional direction valve folding moulds is fewer and feweri to product that it is suitable for, and is restricted because of proportion directional valve fancy price makes to use again.
Summary of the invention
The utility model provides a kind of folding mould hydraulic circuit of injection machine to the existing state of the art, make that its precision is higher, stationarity better and moderate.
The folding mould hydraulic circuit of injection machine; Comprise that folding mould direction valve, band detect matched moulds safety valve, hydraulic jack, proportional throttle valve, folding mould oil return valve; Communicate with hydraulic jack matched moulds chamber after deadweight safety valve and the proportional throttle valve parallel connection; The safety valve oil suction chamber links to each other with folding mould valve working chamber, and the proportional throttle valve oil suction chamber links to each other with folding mould valve oil back chamber; Wherein safety valve and safety door are interlocked, and dead electricity when opening the door is cut off folding mould valve and oil cylinder matched moulds chamber.
In the injection machine operate as normal, during die sinking, the safety valve dead electricity, hydraulic jack die sinking oil return makes its oil return flow controlled through proportional throttle valve, thereby improves die sinking precision and die sinking stationarity.During matched moulds, system's fluid gets into the matched moulds chamber through folding mould valve, safety valve, and its flow pressure is controlled; Select when differential, differential fluid gets into hydraulic jack through folding mould valve, proportional throttle valve, and its differential fluid flow is controlled, thereby improves closing precision, reduces and impacts.
The utility model is through the combination of all kinds of valves, and its advantage has: 1) die sinking oil return flow proportional is controlled, has improved the die sinking precision.2) impact is little among the differential commentaries on classics low pressure molding guarantor of matched moulds, improves closing precision.3) price advantage is obvious.Though a little more than conventional direction valve, far below the proportion directional valve.4) safer.Under the door opening state, safety valve cuts off the matched moulds oil circuit, and monitors its spool position in real time, prevents unexpected matched moulds.But can allow operator's die sinking pickup.
Description of drawings
Fig. 1 is the hydraulic schematic diagram of the utility model embodiment.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, C1 is the folding mould oil cylinder, and V25 is a deadweight safety valve, and V26 is a proportional throttle valve, and V27 is conventional folding mould direction valve, and V29 is a different valve, and V30 is a folding mould oil return valve.Deadweight safety valve V25 is a binary channels, the band position probing, under the door opening state when the die sinking this valve dead electricity, in working at ordinary times always.
During die sinking; The D21 action; Fluid gets into folding mould oil cylinder C1 die sinking chamber through folding mould direction valve V27, thus the time deadweight safety valve V25 dead electricity, the die sinking oil return can only passing ratio choke valve V26, folding mould oil return valve V30 oil sump tank; So die sinking oil return flow is controlled by the V26 ratio, thereby improve die sinking precision and die sinking stationarity.
During matched moulds, D20 action, this moment deadweight safety valve V25 get electric, so system's fluid classical prescription is to valve V27, deadweight safety valve V2 entering folding mould oil cylinder C1 matched moulds chamber.During differential matched moulds, D24 gets electric, and folding mould oil return valve V30 closes; Differential fluid gets into folding mould oil cylinder C1 matched moulds chamber through V27, proportional throttle valve V26; Controlled because of differential fluid flow proportional, system oil hydraulic coupling flow is controlled by system's ratio, so; Can significantly reduce when the differential commentaries on classics low pressure molding of matched moulds is protected and impact, improve closing precision.
Whether under the door opening state, deadweight safety valve V25 dead electricity has been cut off matched moulds valve and folding mould oil cylinder passage, because of V25 band position detecting function, can detect spool in real time and close, thereby avoid under the door opening state, prevents unexpected matched moulds, but can allow client's die sinking pickup.
Wherein V25, V26, V29, V30 can select for use the valve with said function or similar functions to make up each other, like side valve type direction valve, inserted valve etc. according to actual conditions.
Claims (1)
1. the folding mould hydraulic circuit of injection machine; It is characterized in that: comprise that folding mould direction valve, band detect matched moulds safety valve, hydraulic jack, proportional throttle valve, folding mould oil return valve; Communicate with hydraulic jack matched moulds chamber after deadweight safety valve and the proportional throttle valve parallel connection; The safety valve oil suction chamber links to each other with folding mould valve working chamber, and the proportional throttle valve oil suction chamber links to each other with folding mould valve oil back chamber; Wherein safety valve and safety door are interlocked, and dead electricity when opening the door is cut off folding mould valve and oil cylinder matched moulds chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205049919U CN202357400U (en) | 2011-12-07 | 2011-12-07 | Open-close die hydraulic loop of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205049919U CN202357400U (en) | 2011-12-07 | 2011-12-07 | Open-close die hydraulic loop of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202357400U true CN202357400U (en) | 2012-08-01 |
Family
ID=46568613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205049919U Expired - Lifetime CN202357400U (en) | 2011-12-07 | 2011-12-07 | Open-close die hydraulic loop of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202357400U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909838A (en) * | 2012-10-24 | 2013-02-06 | 昌盛达机械(浙江)有限公司 | Double-cylinder differential fast-opening and fast-closing hydraulic system of direct-pressure injection molding machine |
| CN104552857A (en) * | 2015-01-18 | 2015-04-29 | 宁波工程学院 | Hydraulic system for relevant safety control of front and back doors of injection molding machine |
| CN108468663A (en) * | 2018-05-31 | 2018-08-31 | 中石化四机石油机械有限公司 | A kind of Operating Pressure lift controlling system |
-
2011
- 2011-12-07 CN CN2011205049919U patent/CN202357400U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909838A (en) * | 2012-10-24 | 2013-02-06 | 昌盛达机械(浙江)有限公司 | Double-cylinder differential fast-opening and fast-closing hydraulic system of direct-pressure injection molding machine |
| CN102909838B (en) * | 2012-10-24 | 2015-09-23 | 昌盛达机械(浙江)有限公司 | The differential rapid mould opening-closing hydraulic system of direct press type injection moulding machine twin-tub |
| CN104552857A (en) * | 2015-01-18 | 2015-04-29 | 宁波工程学院 | Hydraulic system for relevant safety control of front and back doors of injection molding machine |
| CN108468663A (en) * | 2018-05-31 | 2018-08-31 | 中石化四机石油机械有限公司 | A kind of Operating Pressure lift controlling system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |