CN215434875U - Oil way buffering device for opening and closing die - Google Patents
Oil way buffering device for opening and closing die Download PDFInfo
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- CN215434875U CN215434875U CN202122248115.0U CN202122248115U CN215434875U CN 215434875 U CN215434875 U CN 215434875U CN 202122248115 U CN202122248115 U CN 202122248115U CN 215434875 U CN215434875 U CN 215434875U
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Abstract
The utility model relates to a die opening and closing oil circuit buffering device which comprises an oil tank, an oil supply unit, an overflow valve, an electro-hydraulic reversing valve, a die locking one-way valve, a die opening one-way valve and a die opening and locking oil cylinder, wherein the oil tank is connected with the oil supply unit through the overflow valve; the input end of the oil supply unit is connected with the output end of the oil tank, and the output end of the oil supply unit is connected with the input end of the overflow valve; the electro-hydraulic reversing valve comprises a main valve element and a control valve; the output end of the oil supply unit is connected with an oil port P1 of the main valve core; an oil port A1 of the main valve core (51) is respectively connected with the output end of the mold locking one-way valve and a mold locking oil cavity of the mold unlocking oil cylinder. According to the utility model, the mold opening one-way valve and the mold locking one-way valve are adopted, so that hydraulic oil can be rapidly supplemented into the mold opening oil cavity or the mold locking oil cavity, and the problem that the service life of the injection molding machine is shortened due to the fact that pressure vibration is easily caused in the mold opening and mold locking processes can be solved.
Description
Technical Field
The utility model relates to the technical field of an open-close die oil way, in particular to an open-close die oil way buffering device.
Background
With the high-speed development of the Chinese industry, the high-speed injection molding machine also becomes the dominant force of the current injection molding machine, so that the requirement of working personnel on the operation balance of mold opening and mold locking of the injection molding machine is higher and higher.
When the traditional injection molding machine is used for mold opening and mold locking, the control system has large impact and is not stable in operation. When the mold locking is operated, the hydraulic lock in the mold opening oil cavity is quickly lost, so that hydraulic oil in the pipeline is cut off, and the phenomenon of pressure vibration is caused due to the fact that the pipeline in the pipeline is in an air or vacuum state.
When the mold is opened, the hydraulic lock in the mold locking oil cavity is quickly lost, so that the pressure difference of the mold locking oil cavity is smaller than the pressure difference of the hydraulic oil return tank, pressure vibration is easily caused, and the service life of the injection molding machine is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a die opening and closing oil path buffering device, which adopts a die opening one-way valve and a die locking one-way valve to quickly supplement hydraulic oil into a die opening oil cavity or a die locking oil cavity, so that the problem that the service life of an injection molding machine is shortened due to the fact that pressure vibration is easily caused in the die opening and die locking processes can be solved.
In order to achieve the purpose, the utility model provides the following technical scheme:
a die opening and closing oil circuit buffering device comprises an oil tank, an oil supply unit, an overflow valve, an electro-hydraulic reversing valve, a die locking one-way valve, a die opening one-way valve and a die opening and locking oil cylinder;
the input end of the oil supply unit is connected with the output end of the oil tank, and the output end of the oil supply unit is connected with the input end of the overflow valve;
the electro-hydraulic reversing valve comprises a main valve element and a control valve;
the output end of the oil supply unit is connected with an oil port P1 of the main valve core; an oil port A1 of the main valve core is respectively connected with the output end of the mode locking one-way valve and a mode locking oil cavity of the unlocking mode oil cylinder; an oil port B1 of the main valve core is respectively connected with the output end of the mold opening check valve and a mold opening oil cavity of the mold opening and locking oil cylinder; an oil port T1 of the main valve core is respectively connected with the input end of the mode locking one-way valve, the output end of the overflow valve and the input end of the die opening one-way valve 7 and then connected with the output end of an oil tank;
the oil port A2 of the control valve is connected with a control port of the main valve core, which is close to the oil port B1, and the oil port B2 of the control valve is connected with a control port of the main valve core, which is close to the oil port A1; the oil port P2 of the control valve is connected with the output end of the oil supply unit; and the oil port T2 of the control valve is connected with the input end of the oil tank.
Optionally, an unlocking mold piston is slidably connected to an inner wall of the unlocking mold cylinder, the unlocking mold piston divides the unlocking mold cylinder into the mold opening oil cavity and the mold locking oil cavity, and the unlocking mold piston moves back and forth in the unlocking mold cylinder to complete mold opening and mold locking actions;
and one side surface of the unlocking die piston, which faces the opening die oil cavity, is connected with an unlocking die piston rod, and the axial direction of the unlocking die piston rod is the same as that of the unlocking die oil cylinder.
Optionally, a mold locking tail plate is arranged on the outer side of one end part of the mold opening oil cavity, which is close to the mold opening oil cylinder, of the mold opening oil cylinder, and one end, which is far away from the mold opening piston, of the mold opening piston penetrates out of the mold opening oil cavity and the mold locking tail plate.
Optionally, the oil supply unit includes a motor and a hydraulic oil pump;
the output end of the motor is connected with a hydraulic oil pump, the input end of the hydraulic oil pump is connected with the oil tank through a pipeline, and the output end of the hydraulic oil pump is respectively connected with the oil port P1 of the main valve core, the oil port P2 of the control valve and the input end of the overflow valve.
Optionally, the oil supply unit further comprises a pressure gauge, and the pressure gauge is arranged at the output end of the hydraulic oil pump.
Optionally, the type of the overflow valve is EGB-06.
Optionally, the model of the mold opening check valve and the model of the mold locking check valve are both CRG-06.
Optionally, the main valve core is model D25.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects:
1. the unlocking die oil cylinder and the oil supply unit are communicated through the electro-hydraulic reversing valve, an oil way is reversed, and the die opening or die locking action of the unlocking die oil cylinder can be controlled. In addition, the overflow valve can control the pressure in the pipeline, so that the hydraulic oil circuit can run safely. Because the pressure difference in the pipeline is smaller than the pressure difference of the mold opening one-way valve or the mold locking one-way valve, hydraulic oil can be quickly supplemented into a mold locking oil cavity and a mold opening oil cavity in the mold opening oil cylinder, and the problems that the pressure vibration and the unstable operation are caused due to the large difference between the pressure difference of the mold opening oil cavity and the pressure difference of the mold locking oil cavity when the mold opening or the mold locking is carried out can be solved.
Drawings
Fig. 1 is a hydraulic schematic diagram of an oil circuit buffering device for an open-close mold according to an embodiment of the present invention;
FIG. 2 is an enlarged view of an electro-hydraulic directional valve in an opening and closing oil path buffering device according to an embodiment of the utility model;
wherein, 1, a motor; 2. a hydraulic oil pump; 3. a pressure gauge; 4. an overflow valve; 5. an electro-hydraulic directional valve; 51. a main valve element; 52. a control valve; 6. a mode locking one-way valve; 7. opening the mold one-way valve; 8. unlocking a mold oil cylinder; 9. unlocking the mold piston; 10. locking the mold tail plate; 11. and unlocking the mold piston rod.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An opening/closing mode oil circuit buffer device according to an embodiment of the present invention is described below with reference to fig. 1 to 2.
A die opening and closing oil circuit buffering device comprises an oil tank, an oil supply unit, an overflow valve 4, an electro-hydraulic reversing valve 5, a die locking one-way valve 6, a die opening one-way valve 7 and a die opening and locking oil cylinder 8. The input end of the oil supply unit is connected with the output end of the oil tank, and the output end of the oil supply unit is connected with the input end of the overflow valve 4. The electro-hydraulic directional valve 5 includes a main spool 51 and a control valve 52.
The output end of the oil supply unit is connected with a port P1 of the main valve core 51; an oil port A1 of the main valve core 51 is respectively connected with the output end of the mold locking one-way valve 6 and the mold locking oil cavity of the mold unlocking oil cylinder 8; an oil port B1 of the main valve core 51 is respectively connected with the output end of the mold opening one-way valve 7 and a mold opening oil cavity of the mold opening oil cylinder 8; an oil port T1 of the main valve core 51 is connected with the input end of the mode locking one-way valve 6, the output end of the overflow valve 4 and the input end of the mode opening one-way valve 7 respectively and then is connected with the output end of an oil tank.
The port A2 of the control valve 52 is connected with a control port of the main valve core 51 close to the port B1, and the port B2 of the control valve 52 is connected with a control port of the main valve core 51 close to the port A1; the oil port P2 of the control valve 52 is connected with the output end of the oil supply unit; the port T2 of the control valve 52 is connected to the tank input.
The oil circuit buffer device for the mold opening and closing in the scheme is communicated with the mold opening and closing oil cylinder 8 and the oil supply unit through the electro-hydraulic reversing valve 5, the oil circuit is reversed, and the mold opening or mold locking action of the mold opening and closing oil cylinder 8 can be controlled. In addition, the overflow valve 4 can control the pressure in the pipeline, so that the hydraulic oil circuit can be operated safely. The electro-hydraulic reversing valve 5 is provided with a main valve core 51 and a control valve 52 to control an oil path, so that hydraulic oil can be quickly supplemented into a mold locking oil cavity and a mold opening oil cavity in the mold opening and locking oil cylinder 8, and the problems of pressure vibration and unstable operation caused by large difference between the pressure difference of the mold opening oil cavity and the pressure difference of the mold locking oil cavity during mold opening or mold locking can be solved. The working principle is as follows:
when the mold locking operation of the mold unlocking cylinder 8 is required, the oil port P2 of the control valve 52 is communicated with the oil port a2, so that the control valve 52 can be connected with the control port of the main valve core 51 close to the oil port B1, the oil port P1 is communicated with the oil port a1, and the oil port B1 is communicated with the oil port T1.
The oil supply unit delivers hydraulic oil to the oil port P1 of the main valve core 51, and the hydraulic oil can be transported into the mold locking oil chamber through the oil port a1 due to the communication between the oil port P1 and the oil port a 1. And a large amount of hydraulic oil is conveyed into the mold locking oil cavity and extrudes the mold opening oil cavity, so that the mold locking action is completed. At this time, the port B1 of the main valve body 51 communicates with the port T1, and the hydraulic oil of the mold opening oil chamber flows through the oil passage communicating the port B1 of the main valve body 51 with the port T1 and flows back into the oil tank.
Because the hydraulic oil in the mould opening oil cavity runs off rapidly, the hydraulic oil in the pipeline is easy to break off, and the phenomenon of oil air or vacuum in the pipeline is formed, thereby generating the phenomenon of pressure vibration. At this moment, because pressure vibrations cause the pressure in the mould opening oil cavity to be less than the pressure of hydraulic fluid port T1, only need open mould opening check valve 7, the hydraulic oil of the output of overflow valve 4 and the hydraulic oil of hydraulic fluid port T1 can be based on above-mentioned pressure difference through mould opening check valve 7 fast, supply in the pipeline of mould opening oil cavity to hydraulic oil cutout and the pipeline in can having eliminated the pipeline contains air or vacuum phenomenon, eliminate pressure vibrations phenomenon simultaneously, make the mode locking action more steady.
When the mold opening operation of the mold opening cylinder 8 needs to be performed, the oil port P2 of the control valve 52 is communicated with the oil port B2, so that the control valve 52 can be connected with the control port of the main valve core 51 close to the oil port a1, the oil port P1 is communicated with the oil port B1, and the oil port a1 is communicated with the oil port T1.
The oil supply unit delivers hydraulic oil to the oil port P1 of the main valve core 51, and then the oil port P1 is communicated with the oil port B1, so that the hydraulic oil can be transported into the mold opening oil chamber through the oil port B1. And a large amount of hydraulic oil is conveyed into the mold opening oil cavity and extrudes the mold locking oil cavity, so that the mold opening action is completed. At the moment, the main valve core oil port A1 is communicated with the oil port T1, and hydraulic oil in the mold locking oil chamber flows back to the oil tank through the main valve core A1 and the main valve core T1.
The phenomenon that pressure vibration, mold opening noise are large and a mold is easy to damage is easily caused due to the fact that hydraulic oil in the mold locking oil cavity is released instantly by mechanical force. At this moment, because pressure vibrations cause the pressure in the mode locking oil cavity to be less than the pressure of hydraulic fluid port T1, only need open mode locking check valve 6, hydraulic oil of the output of overflow valve 4 and hydraulic oil that hydraulic fluid port T1 exported can pass through mode locking check valve 6 fast based on above-mentioned pressure differential, supply in the pipeline of mode locking oil cavity, thereby hydraulic oil cutout and the contained air or the vacuum phenomenon in the pipeline in can having eliminated the pipeline, eliminate pressure vibrations simultaneously, the mould opening noise is big and damage the phenomenon of mould easily, make the die sinking action more steady.
In addition, the overflow valve 4 is mainly used for maintaining the pressure in the pipeline and improving the stability of the pressure of the hydraulic oil in the pipeline. When the hydraulic oil delivered by the oil supply unit is too much, the pressure in the pipeline is larger and exceeds the preset range, and part of the hydraulic oil can flow back to the oil tank through the overflow valve 4, so that the flow in the pipeline is reduced, the pressure in the pipeline is ensured to be within the specified range, and the safety of the pipeline is improved.
Compared with an electromagnetic reversing valve, the electro-hydraulic reversing valve 5 has the characteristics of small volume, simple structure, no leakage, low cost, stable reversing and the like, can realize reversing buffering, can control large-flow liquid flow by using a small electromagnet, can be suitable for a high-pressure and large-flow hydraulic system, thereby conveniently realizing automatic control and playing a certain role in oil circuit buffering.
The electromagnetic directional valve mainly replaces the action of human hands by the force of an electromagnet to move the valve core relative to the valve sleeve, thereby realizing remote control. The electro-hydraulic directional valve 5 moves the valve core of the main valve core 51 by the force of the electromagnet, and guides the oil liquid of the control oil path to drive the valve core of the main valve to move relative to the valve sleeve, so that the direction of the main oil path is changed, and the electro-hydraulic directional valve can be controlled remotely, and can change the direction of a large-size slide valve by means of the oil pressure during oil path control.
The inner wall of the mold opening and locking oil cylinder 8 is slidably connected with a mold opening and locking piston 9, the mold opening and locking piston 9 divides the mold opening and locking oil cylinder 8 into a mold opening oil cavity and a mold locking oil cavity, and the mold opening and locking piston 9 moves back and forth in the mold opening and locking oil cylinder 8 to complete the mold opening and locking actions.
And one side surface of the unlocking die piston 9 facing the opening die oil cavity is connected with an unlocking die piston rod 11, and the axial direction of the unlocking die piston rod 11 is the same as that of the unlocking die oil cylinder 8.
It is worth to be noted that when the mold locking action is performed, the oil supply unit conveys the hydraulic oil to the electro-hydraulic directional valve 5, and the electro-hydraulic directional valve 5 conveys the hydraulic oil to the mold locking oil cavity of the mold opening and locking oil cylinder 8. Because a large amount of hydraulic oil is conveyed into the mold locking oil cavity, the hydraulic oil in the mold locking oil cavity extrudes the mold opening locking piston 9 towards the direction of the mold opening oil cavity, and the mold opening locking piston 9 drives the mold opening locking piston rod 11 to move in the mold opening locking oil cylinder 8, so that the mold locking action is completed.
When the mold opening action is carried out, the oil supply unit conveys hydraulic oil to the electro-hydraulic reversing valve 5, and the electro-hydraulic reversing valve 5 conveys the hydraulic oil to the mold opening oil cavity of the mold opening and locking oil cylinder 8. Because a large amount of hydraulic oil is conveyed into the die opening oil cavity, the hydraulic oil in the die opening oil cavity extrudes the unlocking die piston 9 towards the direction of the die locking oil cavity, and the unlocking die piston 9 drives the unlocking die piston rod 11 to move in the unlocking die oil cylinder 8, so that the die opening action is completed.
And a mold locking tail plate 10 is arranged on the outer side of one end part of the mold opening oil cavity, which is close to the mold opening oil cylinder 8, and one end of the mold opening piston rod 11, which is far away from the mold opening piston 9, penetrates out of the mold opening oil cavity and the mold locking tail plate 10.
The mode locking tail plate 10 is installed at the end of the mode unlocking oil cylinder 8, and a closed oil cavity is formed by the mode locking tail plate and the mode unlocking oil cylinder 8, so that the leakage of hydraulic oil from the end of the mode locking tail plate 10 is reduced. In addition, the mold clamping tail plate also plays a guiding role for the mold clamping piston rod 11.
The oil supply unit includes a motor 1 and a hydraulic oil pump 2. The output end of the motor 1 is connected with the hydraulic oil pump 2, the input end of the hydraulic oil pump 2 is connected with the oil tank through a pipeline, and the output end of the hydraulic oil pump 2 is respectively connected with the oil port P1 of the main valve core 51, the oil port P2 of the control valve 52 and the input end of the overflow valve 4. The oil supply unit further comprises a pressure gauge 3, and the pressure gauge 3 is arranged at the output end of the hydraulic oil pump 2.
When the motor 1 is started, the hydraulic oil pump 2 starts to work to provide hydraulic oil for the electro-hydraulic directional valve 5. The hydraulic oil pressure at the output end of the hydraulic oil pump 2 can be detected by the pressure gauge 3. When the pressure of the hydraulic oil in the pipeline is overlarge, the overflow valve 4 is opened, so that part of the hydraulic oil flows back to the oil tank from the overflow valve 4, the pressure of the hydraulic oil in the pipeline can be adjusted, and the pressure of the hydraulic oil in the pipeline is always kept in a safety range.
The overflow valve 4 is EGB-06 in model. The model of the mould opening one-way valve 7 and the model of the mould locking one-way valve 6 are both CRG-06. The main valve element 51 is D25.
In addition, the overflow valve 4 with the model of EGB-06, the die opening one-way valve 7 and the die locking one-way valve 6 with the model of CRG-06 and the main valve element 51 with the model of D25 are all commercially available products, and when the overflow valve 4, the one-way valve and the main valve element 51 have faults, a worker can purchase and replace the overflow valve 4, the one-way valve and the main valve element in time, so that the service life of the whole die opening and closing oil path buffering device can be prolonged.
Other configurations and operations of an open-close mode oil circuit buffer device according to an embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The die opening and closing oil circuit buffering device is characterized by comprising an oil tank, an oil supply unit, an overflow valve, an electro-hydraulic reversing valve, a die locking one-way valve, a die opening one-way valve and a die opening and locking oil cylinder;
the input end of the oil supply unit is connected with the output end of the oil tank, and the output end of the oil supply unit is connected with the input end of the overflow valve;
the electro-hydraulic reversing valve comprises a main valve element and a control valve;
the output end of the oil supply unit is connected with an oil port P1 of the main valve core; an oil port A1 of the main valve core 51 is respectively connected with the output end of the mode locking one-way valve and a mode locking oil cavity of the unlocking mode cylinder; an oil port B1 of the main valve core is respectively connected with the output end of the mold opening check valve and a mold opening oil cavity of the mold opening and locking oil cylinder; an oil port T1 of the main valve core is connected with the input end of the mode locking one-way valve, the output end of the overflow valve and the input end of the mode opening one-way valve respectively and then is connected with the output end of an oil tank;
the oil port A2 of the control valve is connected with a control port of the main valve core, which is close to the oil port B1, and the oil port B2 of the control valve is connected with a control port of the main valve core, which is close to the oil port A1; the oil port P2 of the control valve is connected with the output end of the oil supply unit; and the oil port T2 of the control valve is connected with the input end of the oil tank.
2. The die opening and closing oil path buffering device as claimed in claim 1, wherein an unlocking die piston is slidably connected to an inner wall of the die opening and closing oil cylinder, the unlocking die piston divides the die opening and closing oil cylinder into the die opening oil chamber and the die locking oil chamber, and the unlocking die piston moves back and forth in the die opening and closing oil cylinder to complete die opening and die locking actions;
and one side surface of the unlocking die piston, which faces the opening die oil cavity, is connected with an unlocking die piston rod, and the axial direction of the unlocking die piston rod is the same as that of the unlocking die oil cylinder.
3. The oil path buffering device for mold opening and closing according to claim 2, wherein a mold locking tail plate is disposed outside an end portion of the mold opening oil cylinder close to the mold opening oil chamber, and an end of the mold opening locking piston rod away from the mold opening locking piston penetrates through the mold opening oil chamber and the mold locking tail plate.
4. The opening-closing die oil circuit buffering device as claimed in claim 1, wherein the oil supply unit comprises a motor and a hydraulic oil pump;
the output end of the motor is connected with a hydraulic oil pump, the input end of the hydraulic oil pump is connected with the oil tank through a pipeline, and the output end of the hydraulic oil pump is respectively connected with the oil port P1 of the main valve core, the oil port P2 of the control valve and the input end of the overflow valve.
5. The die opening and closing oil circuit buffering device as claimed in claim 4, wherein the oil supply unit further comprises a pressure gauge, and the pressure gauge is arranged at an output end of the hydraulic oil pump.
6. The open-close die oil circuit buffering device as claimed in claim 1, wherein the overflow valve is of type EGB-06.
7. The opening-closing mold oil circuit buffering device as claimed in claim 1, wherein the model of the opening mold check valve and the model of the locking mold check valve are both CRG-06.
8. The open-close die oil circuit buffering device as claimed in claim 1, wherein the main valve core is D25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122248115.0U CN215434875U (en) | 2021-09-16 | 2021-09-16 | Oil way buffering device for opening and closing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122248115.0U CN215434875U (en) | 2021-09-16 | 2021-09-16 | Oil way buffering device for opening and closing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215434875U true CN215434875U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122248115.0U Active CN215434875U (en) | 2021-09-16 | 2021-09-16 | Oil way buffering device for opening and closing die |
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| Country | Link |
|---|---|
| CN (1) | CN215434875U (en) |
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2021
- 2021-09-16 CN CN202122248115.0U patent/CN215434875U/en active Active
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