CN211968331U - A locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little - Google Patents
A locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little Download PDFInfo
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- CN211968331U CN211968331U CN201922062347.XU CN201922062347U CN211968331U CN 211968331 U CN211968331 U CN 211968331U CN 201922062347 U CN201922062347 U CN 201922062347U CN 211968331 U CN211968331 U CN 211968331U
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Abstract
The utility model discloses a material storage screw locking oil circuit that moves back for special injection molding machine of little foaming, it sets up on the injection oil circuit of injection molding machine standard, it includes cartridge valve and two-position four-way solenoid valve, the characteristics are that this material storage screw locking oil circuit that moves back still includes the shuttle valve, the first entry of shuttle valve and the injection cylinder in the injection molding machine are penetrated and move back the chamber and are communicated, the second entry of shuttle valve and the guide oil pocket of energy storage ware in the injection molding machine communicate, the export of shuttle valve and a port of two-position four-way solenoid valve communicate, another port of two-position four-way solenoid valve communicates with the control port of cartridge valve, the first hydraulic fluid port of cartridge valve and the oil circuit of injection molding machine standard communicate, the second hydraulic fluid port of cartridge valve and the injection cylinder in the injection; the advantage is that it has avoided effectively that the phenomenon that the case of cartridge valve can't normally close that causes when the pressure oil pressure of pressure oil in the penetrating and retreating intracavity of injection cylinder is not enough or the pressure of pilot oil in the pilot oil intracavity of energy storage ware is not enough.
Description
Technical Field
The utility model relates to a special injection molding machine of foaming a little especially relates to a locking oil circuit that moves back of storage screw rod for special injection molding machine of foaming a little.
Background
The micro-foaming injection molding process is an innovative precise injection molding technology. The micro-foaming injection molding process can remarkably reduce the weight of a finished piece, shorten the molding period, greatly improve the buckling deformation and the dimensional stability of the finished piece, and has extremely wide application in the automobile industry. At present, the T-series micro-foaming system of the American Trexel company is mostly applied, and the injection molding machine applying the micro-foaming system needs to be matched with a screw anti-loosening oil circuit so as to generate stable back pressure in an injection cavity of an injection oil cylinder and prevent the screw from retreating during material storage. At present, two types of internally-controlled screw anti-loosening oil passages and externally-controlled screw anti-loosening oil passages are mainly applied.
As shown in figure 1, a cartridge valve V13 and a two-position four-way solenoid valve V14 for introducing pressure oil from an injection cavity of an injection cylinder are newly added on a standard injection oil path of an injection molding machine, a cartridge valve V13 and a two-position four-way solenoid valve V14 form an internally-controlled screw anti-loosening oil path, an oil port B of a cartridge valve V13 is communicated with the injection cavity of the injection cylinder, an oil port A of a cartridge valve V13 is communicated with a cartridge valve V7 in an oil return path, a control port K of a cartridge valve V13 is communicated with one port of a two-position four-way solenoid valve V14, the other port of the two-position four-way solenoid valve V14 is communicated with the injection cavity of the injection cylinder, when a micro-foaming injection molding process is normally used, the two-position back pressure of the injection cavity of the injection cylinder is required to prevent the screw from backing up when the screw is subjected to storage molding, an electromagnet D6 of the two-position four-way solenoid valve V14 is electrified, the valve core of the cartridge valve V13 is closed, and the oil port B of the cartridge valve V13 is not communicated with the oil port A, so that the screw is prevented from backing; according to the screw rod anti-loosening oil circuit, because the pressure oil of the two-position four-way electromagnetic valve V14 is led from the injection and retraction cavity of the injection oil cylinder, when the pressure oil in the injection and retraction cavity is unstable, the spool of the cartridge valve V13 is easy to be unstable and cannot be normally closed, so that the screw rod can retreat by several millimeters, and the product is poor.
As shown in figure 2, a cartridge valve V13 and a two-position four-way solenoid valve V14 for leading in pilot oil from a pilot oil cavity of an accumulator are newly added on a standard injection oil way of an injection molding machine, a cartridge valve V13 and a two-position four-way solenoid valve V14 form an externally-controlled screw anti-loosening oil way, an oil port A of a cartridge valve V13 is communicated with an injection and retraction cavity of an injection oil cylinder, an oil port B of a cartridge valve V13 is communicated with a cartridge valve V7 in an oil return way, a control port K of a cartridge valve V13 is communicated with one port of a two-position four-way solenoid valve V14, the other port of the two-position four-way solenoid valve V14 is communicated with the pilot oil cavity of the accumulator, when a micro-foaming injection molding process is used under normal conditions, the two-position back pressure of the injection cavity of the injection oil cylinder is required to prevent the screw from retracting, an electromagnet D6 of the two-position four-way solenoid valve V14 is electrified, the, the valve core of the cartridge valve V13 is closed, and the oil port A and the oil port B of the cartridge valve V13 are not communicated, so that the screw is prevented from backing; according to the screw rod anti-loosening oil way, because the pressure oil of the two-position four-way electromagnetic valve V14 is guided from the pilot oil cavity of the energy accumulator, when the pressure of the pilot oil of the energy accumulator is insufficient or the oil pressure is unstable, the spool of the cartridge valve V13 is easy to be unstable and cannot be normally closed, so that the screw rod can retreat by several millimeters, and the product is poor.
Disclosure of Invention
The utility model aims to solve the technical problem that a locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little is provided, its phenomenon that the case of cartridge valve that has avoided injection cylinder's penetrating to move back that the pressure oil pressure of intracavity is not enough or the guide oil pressure of the guide oil intracavity of energy storage ware causes when not enough effectively.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little, its setting is on the injection oil circuit of injection molding machine standard, and it includes cartridge valve and two four-way solenoid valve, its characterized in that: the anti-loosening oil return path of the storage screw further comprises a shuttle valve, a first inlet of the shuttle valve is communicated with an ejection chamber of an injection oil cylinder in the injection molding machine, a second inlet of the shuttle valve is communicated with a pilot oil chamber of an energy accumulator in the injection molding machine, an outlet of the shuttle valve is communicated with a port of a two-position four-way solenoid valve, another port of the two-position four-way solenoid valve is communicated with a control port of a cartridge valve, a first oil port of the cartridge valve is communicated with a standard oil return path of the injection molding machine, and a second oil port of the cartridge valve is communicated with the ejection chamber of the injection oil cylinder in the injection molding machine.
When the pressure of pressure oil in the ejection cavity of the injection oil cylinder in the injection molding machine is greater than the pressure of pressure oil in the guide oil cavity of the energy accumulator in the injection molding machine, the two-position four-way electromagnetic valve is introduced into the pressure oil in the ejection cavity of the injection oil cylinder in the injection molding machine through the shuttle valve after the electromagnet of the two-position four-way electromagnetic valve is electrified; when the pressure of the pilot oil in the pilot oil cavity of the energy accumulator in the injection molding machine is greater than the pressure of the pressure oil in the injection and retraction cavity of the injection oil cylinder in the injection molding machine, the two-position four-way electromagnetic valve is introduced into the pilot oil in the pilot oil cavity of the energy accumulator in the injection molding machine through the shuttle valve after the electromagnet of the two-position four-way electromagnetic valve is electrified.
Compared with the prior art, the utility model has the advantages of:
1) by adding a new shuttle valve, the first inlet of the shuttle valve is communicated with the injection and retraction cavity of the injection oil cylinder in the injection molding machine, the second inlet of the shuttle valve is communicated with the pilot oil cavity of the energy accumulator in the injection molding machine, the outlet of the shuttle valve is communicated with one port of the two-position four-way electromagnetic valve, the shuttle valve can judge whether the pressure of the pressure oil in the injection and retraction cavity of the injection oil cylinder in the injection molding machine is high or the pressure of the pilot oil in the pilot oil cavity of the energy accumulator in the injection molding machine is high, and the pressure oil or the pilot oil with higher pressure is introduced into the two-position four-way electromagnetic valve, so that the pressure oil or the pressure of the pilot oil introduced into the two-position four-way electromagnetic valve is insufficient or unstable, the valve core of the cartridge valve is not unstable, the valve core of the cartridge valve can be normally closed, the retraction is ensured, and the yield of products is.
2) The working reliability and stability of the hydraulic system of the injection molding machine are effectively improved only on the basis of adding one shuttle valve.
Drawings
FIG. 1 is a schematic diagram of an application of a conventional internal control screw anti-loosening oil passage;
FIG. 2 is a schematic diagram of an application of a conventional externally controlled anti-loosening oil passage of a screw;
fig. 3 is the utility model discloses a locking application schematic diagram that moves back the oil circuit of storage screw.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The utility model provides a locking oil circuit that moves back of storage screw rod for micro-foaming special injection molding machine, as shown in fig. 3, it sets up on the injection oil circuit of injection molding machine standard, it includes cartridge valve V13, two four-way solenoid valve V14, shuttle valve V15, shuttle valve V15 ' S first entry and injection cylinder ' S in the injection molding machine chamber S1 intercommunication that moves back, shuttle valve V15 ' S second entry and the leading oil pocket X1 intercommunication of energy storage ware in the injection molding machine, shuttle valve V15 ' S export and two four-way solenoid valve V14 ' S a port intercommunication, another port of two four-way solenoid valve V14 and cartridge valve V13 ' S control mouth K intercommunication, cartridge valve V13 ' S first hydraulic fluid port A and one hydraulic fluid port intercommunication of one cartridge valve V7 in the oil circuit of injection molding machine standard, cartridge valve V13 ' S second hydraulic fluid port B and injection cylinder ' S in the injection molding machine chamber S1 intercommunication that moves back.
When the micro-foaming injection molding process is used under normal conditions, when the screw performs pre-molding and storing, the injection cavity of the injection cylinder needs to generate stable back pressure to prevent the screw from retreating, at the moment, the anti-loosening oil return path of the storing screw is enabled to work, namely, the electromagnet D6 of the two-position four-way electromagnetic valve V14 is electrified, the shuttle valve V15 judges whether the pressure of the pressure oil in the ejection cavity S1 of the injection cylinder in the injection molding machine is high or the pressure of the pilot oil in the pilot oil cavity X1 of the energy accumulator in the injection molding machine is high, when the pressure of the pressure oil in the ejection cavity S1 of the injection cylinder in the injection molding machine is higher than the pressure of the pilot oil in the pilot oil cavity X1 of the energy accumulator in the injection molding machine, the two-position four-way electromagnetic valve 14 is introduced into the ejection cavity S1 of the injection cylinder in the injection molding machine through the shuttle valve V15, the valve V13 is normally closed under stable oil pressure, and the first oil port A and the second, the screw is ensured not to retreat when storing materials; when the pressure of the pilot oil in the pilot oil cavity X1 of the energy accumulator in the injection molding machine is greater than the pressure of the pressure oil in the injection and retraction cavity S1 of the injection cylinder in the injection molding machine, the two-position four-way solenoid valve V14 introduces the pilot oil in the pilot oil cavity X1 of the energy accumulator in the injection molding machine through the shuttle valve V15, the valve core of the cartridge valve V13 is normally closed under stable oil pressure, the first oil port A and the second oil port B of the cartridge valve V13 are not communicated, and the screw is ensured not to retract during storage.
In fig. 3, P1 represents the entry of pilot oil in a pilot oil chamber X1 of an accumulator in an injection molding machine, P2 represents the entry of pressure oil of a main system, F1 represents a pressure sensor, B1 represents a pressure gauge, M1 represents a hydraulic motor, V1, V2, V3 and V10 each represent a two-position four-way solenoid valve, V4, V5, V6, V7 and V9 each represent a cartridge valve, V8 represents a proportional pressure valve, V11 represents a check valve, and V12 represents a shuttle valve.
Claims (2)
1. The utility model provides a locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little, its setting is on the injection oil circuit of injection molding machine standard, and it includes cartridge valve and two four-way solenoid valve, its characterized in that: the anti-loosening oil return path of the storage screw further comprises a shuttle valve, a first inlet of the shuttle valve is communicated with an ejection chamber of an injection oil cylinder in the injection molding machine, a second inlet of the shuttle valve is communicated with a pilot oil chamber of an energy accumulator in the injection molding machine, an outlet of the shuttle valve is communicated with a port of a two-position four-way solenoid valve, another port of the two-position four-way solenoid valve is communicated with a control port of a cartridge valve, a first oil port of the cartridge valve is communicated with a standard oil return path of the injection molding machine, and a second oil port of the cartridge valve is communicated with the ejection chamber of the injection oil cylinder in the injection molding machine.
2. The anti-loosening oil way for the storage screw of the special micro-foaming injection molding machine according to claim 1, is characterized in that: when the pressure of pressure oil in the ejection cavity of the injection oil cylinder in the injection molding machine is greater than the pressure of pressure oil in the guide oil cavity of the energy accumulator in the injection molding machine, the two-position four-way electromagnetic valve is introduced into the pressure oil in the ejection cavity of the injection oil cylinder in the injection molding machine through the shuttle valve after the electromagnet of the two-position four-way electromagnetic valve is electrified; when the pressure of the pilot oil in the pilot oil cavity of the energy accumulator in the injection molding machine is greater than the pressure of the pressure oil in the injection and retraction cavity of the injection oil cylinder in the injection molding machine, the two-position four-way electromagnetic valve is introduced into the pilot oil in the pilot oil cavity of the energy accumulator in the injection molding machine through the shuttle valve after the electromagnet of the two-position four-way electromagnetic valve is electrified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062347.XU CN211968331U (en) | 2019-11-26 | 2019-11-26 | A locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062347.XU CN211968331U (en) | 2019-11-26 | 2019-11-26 | A locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little |
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| CN211968331U true CN211968331U (en) | 2020-11-20 |
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| CN201922062347.XU Active CN211968331U (en) | 2019-11-26 | 2019-11-26 | A locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001059A (en) * | 2021-08-25 | 2022-02-01 | 海天塑机集团有限公司 | V-shaped injection hydraulic oil way of injection molding machine |
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2019
- 2019-11-26 CN CN201922062347.XU patent/CN211968331U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001059A (en) * | 2021-08-25 | 2022-02-01 | 海天塑机集团有限公司 | V-shaped injection hydraulic oil way of injection molding machine |
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