CN215661712U - Anti-rebound control oil way of injection molding machine - Google Patents
Anti-rebound control oil way of injection molding machine Download PDFInfo
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- CN215661712U CN215661712U CN202122384984.6U CN202122384984U CN215661712U CN 215661712 U CN215661712 U CN 215661712U CN 202122384984 U CN202122384984 U CN 202122384984U CN 215661712 U CN215661712 U CN 215661712U
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Abstract
The application relates to an injection molding machine technical field especially relates to an anti-rebound control oil circuit of injection molding machine, include: the hydraulic cylinder, the die opening and closing control valve, the die opening back pressure control valve, the oil storage component and the one-way valve; the hydraulic cylinder, the die opening and closing control valve, the die opening back pressure control valve and the oil storage component are communicated in sequence to form a die opening and closing control oil way; the rod cavity of the hydraulic cylinder is communicated with the oil storage component through a one-way valve and is used for controlling the one-way transmission of the oil liquid to the rod cavity of the hydraulic cylinder through the oil storage component. A supplementary oil path is added to a rod cavity of a hydraulic cylinder in the anti-rebound control oil path of the injection molding machine, so that the mold opening stability is effectively improved, the rebound of a template during quick mold opening is effectively solved, the phenomenon of oil cylinder suction during quick mold opening is effectively solved, the damage of cavitation to the oil cylinder and a sealing element thereof is prevented, meanwhile, the reverse stress of an oil pump during quick mold opening braking is also effectively reduced, and the service life of the oil pump is prolonged.
Description
Technical Field
The application relates to the technical field of injection molding machines, in particular to an anti-rebound control oil way of an injection molding machine.
Background
At present, along with the development of economy and the progress of society, the improvement of the operation stability of the injection molding machine is more and more emphasized. The injection molding machine is used as an important manufacturing device in the plastic industry, and high-efficiency and stable operation can bring higher economic benefit to customers.
In the process of opening the mold of the injection molding machine, if the mold opening and closing speed needs to be increased, the mold opening speed reaches a certain numerical value, and when the mold opening is finished, the mold plate rebounds under the action of inertia force, specifically, the mold plate continues to move towards the direction of opening the mold due to the action of the inertia force, and touches other structures of the injection molding machine, so that the mold plate turns to move towards the direction of closing the mold, and the rebounding phenomenon occurs.
In addition, in the mold opening process of the injection molding machine, a rod cavity of the hydraulic cylinder is filled with oil, and a rodless cavity of the hydraulic cylinder is filled with oil, so that the mold opening operation is realized, when the mold opening is finished, an oil pump of a system oil circuit is reversed, hydraulic oil in the rod cavity of the hydraulic cylinder is quickly pumped out, the pressure is reduced to zero, a piston rod of the hydraulic cylinder stops moving, and further the mold plate stops moving, so that the mold opening operation is completed.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a bounce-back control oil circuit is prevented to injection molding machine, when having solved the quick die sinking of injection molding machine that exists among the prior art to a certain extent, the phenomenon of template bounce-back appears extremely easily, causes the die sinking action uncontrolled, influences the technical problem of die sinking stability and motion cycle.
The application provides an injection molding machine prevents control oil circuit that rebounds, includes: the hydraulic cylinder, the die opening and closing control valve, the die opening back pressure control valve, the one-way valve and the oil storage component are arranged on the hydraulic cylinder; the hydraulic cylinder, the mold opening and closing control valve, the mold opening back pressure control valve and the oil storage component are communicated in sequence to form a mold opening and closing control oil path;
and the rod cavity of the hydraulic cylinder is communicated with the oil storage component through the one-way valve and is used for controlling the one-way transmission of oil to the rod cavity of the hydraulic cylinder through the oil storage component.
In the above technical solution, further, the check valve is communicated with the rod chamber of the hydraulic cylinder through a first pipeline, and a part of the first pipeline close to the rod chamber of the hydraulic cylinder is formed as a high pressure resistant hose, and the highest pressure that the high pressure resistant hose can bear is 350 bar.
In any one of the above technical solutions, further, the rod cavity of the hydraulic cylinder is communicated with the first working oil port of the mold opening and closing control valve through a second pipeline, a part of the second pipeline close to the rod cavity of the hydraulic cylinder is formed into a high pressure resistant hose, and the highest pressure which the high pressure resistant hose can bear is 350 bar.
In any of the above technical solutions, further, the high pressure resistant hose portion of the first pipeline and the high pressure resistant hose portion of the second pipeline are formed into an integrated structure.
In any of the above technical solutions, further, the rodless cavity of the hydraulic cylinder is communicated with the second working oil port of the mold opening and closing control valve through a third pipeline, a part of the third pipeline close to the rodless cavity of the hydraulic cylinder is formed into a high pressure resistant hose, and the highest pressure that the high pressure resistant hose can bear is 350 bar.
In any of the above technical solutions, further, the mold opening and closing control valve is a three-position four-way valve.
In any of the above technical solutions, further, the rod cavity and the rodless cavity of the hydraulic cylinder are respectively communicated with the first working oil ports and the second working oil ports of the die opening and closing control valves, which are in one-to-one correspondence;
an oil return port of the mold opening and closing control valve is communicated with the oil storage component through the mold opening back pressure control valve; and a pressure oil port of the mold opening and closing control valve is communicated with a hydraulic oil supply source through a hydraulic pump.
In any one of the above technical solutions, further, the hydraulic oil supply source is the oil storage member.
In any one of the above technical solutions, further, the die opening back pressure control valve includes a pilot valve and a plug-in main valve, and the pilot valve is connected with the plug-in main valve.
In any one of the above technical solutions, further, the oil storage member is an oil storage tank.
Compared with the prior art, the beneficial effect of this application is:
in the anti-rebound control oil circuit of the injection molding machine, a supplement oil circuit is added, namely the oil circuit that the rod cavity of the hydraulic cylinder is communicated with the oil storage component through the check valve is added, the check valve is utilized to supplement oil to the rod cavity of the hydraulic cylinder when the mold opening is braked, namely the mold opening is finished, so that the pressure of the rod cavity of the hydraulic cylinder is maintained in a pressure state larger than zero, the pressure of the rod cavity of the hydraulic cylinder is larger than the pressure of the rodless cavity of the hydraulic cylinder at the moment, a piston rod of the hydraulic cylinder is pushed to move towards the mold opening direction, and the mold plate is driven to move towards the mold opening direction, in addition, the rebound phenomenon specifically refers to the direction movement of turning to mold closing when the mold plate is in the advancing process, so that two movement trends can be abutted, the rebound problem of the mold plate during rapid mold opening is effectively solved, the mold opening action is more controllable, and the mold opening stability is increased, reduce the movement period and improve the production efficiency.
In addition, by adopting the measure of supplementing oil to the rod cavity of the hydraulic cylinder, the problem that the rod cavity of the hydraulic cylinder is sucked and also vacuumized when the mold is opened quickly can be effectively solved, and the damage of cavitation to the hydraulic cylinder and the sealing piece thereof is prevented.
In addition, by adopting the measure of supplementing oil to the rod cavity of the hydraulic cylinder, the reverse stress of the oil pump during rapid die opening and braking can be effectively reduced, and the service life of the oil pump is prolonged.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of an anti-rebound control oil circuit of an injection molding machine provided in an embodiment of the present application.
Reference numerals:
1-hydraulic cylinder, 11-rod cavity, 12-rodless cavity, 13-piston rod, 2-mold opening and closing control valve, 3-mold opening and closing back pressure control valve, 31-pilot valve, 32-plug-in main valve, 4-oil storage component, 5-one-way valve, 6-first pipeline, 7-second pipeline, 8-third pipeline and 9-high pressure resistant hose.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, an anti-bounce control oil circuit of an injection molding machine according to some embodiments of the present application will be described.
Referring to fig. 1, an embodiment of the present application provides an anti-bounce control oil circuit for an injection molding machine, including: the mold opening and closing control valve 2, the mold opening back pressure control valve 3, the check valve 5 and the oil storage component 4 are arranged on the hydraulic cylinder 1; the hydraulic cylinder 1, the mold opening and closing control valve 2, the mold opening back pressure control valve 3 and the oil storage component 4 are communicated in sequence to form a mold opening and closing control oil path;
the rod cavity 11 of the hydraulic cylinder 1 is communicated with the oil storage component 4 through the one-way valve 5 and is used for controlling the one-way transmission of the oil to the rod cavity 11 of the hydraulic cylinder 1 through the oil storage component 4.
Based on the above description, it can be known that a supplementary oil path is added, that is, the oil path "the rod cavity 11 of the hydraulic cylinder 1 is communicated with the oil storage component 4 via the check valve 5" is added, the check valve 5 is utilized to supplement oil to the rod cavity 11 of the hydraulic cylinder 1 when the mold is opened and braked, that is, when the mold is opened, so that the pressure of the rod cavity 11 of the hydraulic cylinder 1 is maintained in a pressure state larger than zero, and then the pressure of the rod cavity 11 of the hydraulic cylinder 1 is larger than the pressure of the rod-free cavity 12 of the hydraulic cylinder 1, so as to push the piston rod 13 of the hydraulic cylinder 1 to move towards the mold opening direction, and further drive the mold to move towards the mold opening direction, in addition, the rebound phenomenon specifically refers to the direction movement of turning to mold closing when the mold encounters an obstacle in the process of mold advancing, and thus, two movement trends can abut against each other, effectively solve the rebound problem of the mold during rapid mold opening, and the mold opening action is more controllable, the stability of die sinking is increased, the motion cycle is reduced, and the production efficiency is improved.
In addition, by adopting the measure of supplementing the oil to the rod cavity 11 of the hydraulic cylinder 1, the problem that the rod cavity 11 of the hydraulic cylinder 1 is sucked and vacuumized when the mold is opened quickly can be effectively solved, and the damage of cavitation to the hydraulic cylinder 1 and the sealing piece thereof is prevented.
In addition, adopt above-mentioned measure of mending oil to the pole chamber 11 of pneumatic cylinder 1, the oil pump reversal atress when still can effectively reduce quick die sinking brake (because the template appears rebounding, total control system receives triggering, must control the oil pump and make synchronous change, leads to the oil pump to change repeatedly, influences its performance and life), improves oil pump life.
Certainly, for utilizing the check valve 5 to supplement oil to the rod cavity 11 of the hydraulic cylinder 1 during mold opening and braking, the pressure of the rod cavity 11 of the hydraulic cylinder 1 can be maintained to be equal to zero, although the rebound of the template cannot be completely eliminated, the rebound of the template cannot be aggravated at least, and the stability of the mold opening after the mold opening is finished is also facilitated to be improved, or for some processes of non-rapid mold closing, because the speed of the template is not fast, the inertia force is not large, and the obvious rebound cannot occur, then only the rebound needs to be ensured to be not added at this time, so the oil is supplemented to the rod cavity 11 of the hydraulic cylinder 1 through the check valve 5, and the pressure of the rod cavity 11 of the hydraulic cylinder 1 is maintained to be equal to zero.
In one embodiment of the present application, preferably, as shown in fig. 1, the check valve 5 communicates with the rod chamber 11 of the hydraulic cylinder 1 through the first pipe 6, and a portion of the first pipe 6 adjacent to the rod chamber 11 of the hydraulic cylinder 1 is structured as a high pressure resistant hose 9.
Wherein, the highest pressure that the high pressure resistant hose 9 can bear is preferably 350bar, because the working pressure in the general oil circuit is 210bar, the high pressure resistant hose 9 is selected to meet the requirement.
In this embodiment, since the hydraulic cylinder 1 is adjusted in position according to actual needs, the part of the first pipeline 6 close to the rod chamber 11 of the hydraulic cylinder 1 is designed as the high pressure resistant hose 9, so that hard connection is avoided, and adjustability is improved.
Preferably, the first pipeline 6, except for the hose portion, has a steel pipe structure, so that the structure is stable and not easy to damage, but not limited thereto.
In one embodiment of the present application, preferably, as shown in fig. 1, the rod chamber 11 of the hydraulic cylinder 1 is communicated with the first working port of the mold opening and closing control valve 2 through a second pipeline 7, and a part of the second pipeline 7 adjacent to the rod chamber 11 of the hydraulic cylinder 1 is structurally formed as a high pressure resistant hose 9.
In this embodiment, the reason why the part of the second pipeline 7 close to the rod chamber 11 of the hydraulic cylinder 1 is designed as the high pressure resistant hose 9 is the same as that described above, that is, because the hydraulic cylinder 1 can adjust the position according to the actual requirement, the part of the second pipeline 7 close to the rod chamber 11 of the hydraulic cylinder 1 is designed as the high pressure resistant hose 9, so that hard connection is avoided, the adjustability is improved, and the highest pressure which can be borne by the high pressure resistant hose 9 is 350bar, and because the working pressure in a general oil path is 210bar, the high pressure resistant hose 9 is selected to meet the requirement.
In one embodiment of the present application, preferably, as shown in fig. 1, the high pressure resistant hose portion of the first pipeline 6 and the high pressure resistant hose portion of the second pipeline 7 are formed as an integral structure.
In this embodiment, the high-pressure-resistant hose portion of the first pipeline 6 and the high-pressure-resistant hose portion of the second pipeline 7 are designed into a whole, that is, partial structures of the two pipelines coincide with each other, so that the pipeline saving effect is achieved, the cost is reduced, and meanwhile, messy and non-stretch caused by multiple pipelines, that is, the occupied space is excessively occupied.
In one embodiment of the present application, preferably, as shown in fig. 1, the rodless chamber 12 of the hydraulic cylinder 1 and the second working port of the mold opening and closing control valve 2 communicate with each other through a third pipeline 8, and a part of the third pipeline 8 adjacent to the rodless chamber 12 of the hydraulic cylinder 1 is structurally formed as a high pressure resistant hose 9.
In this embodiment, the reason why the part of the third pipeline 8 close to the rodless chamber 12 of the hydraulic cylinder 1 is designed as the high pressure resistant hose 9 is the same as that described above, that is, because the hydraulic cylinder 1 can adjust the position according to the actual need, the part of the third pipeline 8 close to the rodless chamber 12 of the hydraulic cylinder 1 is designed as the high pressure resistant hose 9, so that a hard connection is avoided, and the adjustability is improved.
Wherein, the highest pressure that the high pressure resistant hose can bear is 350bar, because the working pressure in the general oil circuit is 210bar, the high pressure resistant hose is selected to meet the requirement.
In one embodiment of the present application, the mold opening and closing control valve 2 is preferably a three-position four-way valve as shown in fig. 1.
Preferably, as shown in fig. 1, the rod chamber 11 and the rodless chamber 12 of the hydraulic cylinder 1 are respectively communicated with the first working oil port and the second working oil port of the mold opening and closing control valve 2, which correspond to each other one by one;
an oil return port of the mold opening and closing control valve 2 is communicated with an oil storage component 4 through a mold opening back pressure control valve 3;
and a pressure oil port of the mold opening and closing control valve 2 is communicated with a hydraulic oil supply source through a hydraulic pump.
In this embodiment, specifically, the three-position four-way valve includes a valve core, three adjusting positions are formed along a length direction of the valve core, and a first adjusting position, a second adjusting position and a third adjusting position are sequentially formed from left to right, when the valve core moves to the third adjusting position, that is, the first working oil port of the mold opening and closing control valve 2 is communicated with the pressure oil port, the second working oil port of the mold opening and closing control valve 2 is communicated with the oil return port, so that the rodless cavity 12 of the hydraulic cylinder 1 is filled with oil, the rod cavity 11 of the hydraulic cylinder 1 is filled with oil, and the injection molding machine performs mold closing operation;
when the valve core moves to the first adjusting position, the first working oil port and the oil return port of the mold opening and closing control valve 2 are communicated at the moment, the second working oil port and the pressure oil port of the mold opening and closing control valve 2 are communicated, so that the rod cavity 11 of the hydraulic cylinder 1 is fed with oil, the rodless cavity 12 of the hydraulic cylinder 1 is fed with oil, and the injection molding machine executes the mold opening operation.
In the process of opening and closing the dies, the die opening back pressure control valve 3 keeps the pressure required in the oil path under the condition that the pressure in the oil path is unstable, so that the stability of the die opening and closing process is ensured.
Wherein, preferably, as shown in fig. 1, the hydraulic oil supply source is the oil storage member 4.
In this embodiment, the oil storage member 4 can be used as both a source for supplying oil and a place for containing return oil, so that recycling is achieved, a hydraulic oil supply source does not need to be separately arranged, and energy and space investment are saved.
In one embodiment of the present application, as shown in fig. 1, the open-die back pressure control valve 3 preferably includes a pilot valve 31 and an inserted main valve 32, the pilot valve 31 is connected to the inserted main valve 32, the pilot valve 31 belongs to a control mechanism, and the open or close of the inserted main valve 32 is controlled by using the pilot valve 31.
In this embodiment, the open-die backpressure control valve 3 belongs to a pilot backpressure valve, and has high reaction speed and convenient use.
In one embodiment of the present application, preferably, as shown in fig. 1, the oil storage member 4 is an oil storage tank, and wherein, preferably, the oil storage tank may be a rectangular box body, which has strong oil storage capacity, a firm structure and an opening at the top end thereof, and an oil pipeline may directly extend into the box body from the opening.
To sum up, a supplementary oil path is added to the rod cavity 11 of the hydraulic cylinder 1 in the anti-rebound control oil path of the injection molding machine, and the injection molding machine further has the following advantages:
firstly, the die sinking stability is effectively improved;
secondly, the rebound of the template during rapid die opening is effectively solved;
thirdly, the phenomenon of oil cylinder suction during rapid die opening is effectively solved, and the damage of cavitation to the oil cylinder and a sealing element thereof is prevented;
fourthly, the reverse rotation stress of the oil pump is effectively reduced when the brake is quickly opened, and the service life of the oil pump is prolonged.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The utility model provides an injection molding machine prevents bounce-back control oil circuit which characterized in that includes: the hydraulic cylinder, the die opening and closing control valve, the die opening back pressure control valve, the oil storage component and the one-way valve; the hydraulic cylinder, the mold opening and closing control valve, the mold opening back pressure control valve and the oil storage component are communicated in sequence to form a mold opening and closing control oil path;
and the rod cavity of the hydraulic cylinder is communicated with the oil storage component through the one-way valve and is used for controlling the one-way transmission of oil to the rod cavity of the hydraulic cylinder through the oil storage component.
2. The injection molding machine anti-bounce control oil circuit according to claim 1, wherein the check valve is communicated with the rod cavity of the hydraulic cylinder through a first pipeline, and a part of the first pipeline close to the rod cavity of the hydraulic cylinder is structurally formed into a high pressure resistant hose, and the highest pressure which the high pressure resistant hose can bear is 350 bar.
3. The anti-rebound control oil circuit of the injection molding machine as claimed in claim 2, wherein the rod cavity of the hydraulic cylinder is communicated with the first working oil port of the mold opening and closing control valve through a second pipeline, and a part of the second pipeline close to the rod cavity of the hydraulic cylinder is structurally formed into a high pressure resistant hose, and the highest pressure which the high pressure resistant hose can bear is 350 bar.
4. The anti-bounce control oil circuit of an injection molding machine according to claim 3, wherein the high pressure resistant hose portion of the first pipeline and the high pressure resistant hose portion of the second pipeline are formed as a unitary structure.
5. The injection molding machine anti-rebound control oil circuit as claimed in claim 1, wherein the rodless cavity of the hydraulic cylinder is communicated with the second working oil port of the mold opening and closing control valve through a third pipeline, and a part of the third pipeline close to the rodless cavity of the hydraulic cylinder is structurally formed into a high pressure resistant hose, and the highest pressure which the high pressure resistant hose can bear is 350 bar.
6. The anti-bounce control oil circuit of an injection molding machine according to claim 1, wherein the mold opening and closing control valve is a three-position four-way valve.
7. The anti-rebound control oil circuit of the injection molding machine as claimed in claim 6, wherein the rod chamber and the rodless chamber of the hydraulic cylinder are respectively communicated with the first working oil port and the second working oil port of the mold opening and closing control valve which correspond one to one;
an oil return port of the mold opening and closing control valve is communicated with the oil storage component through the mold opening back pressure control valve; and a pressure oil port of the mold opening and closing control valve is communicated with a hydraulic oil supply source through a hydraulic pump.
8. The anti-bounce control oil circuit of an injection molding machine according to claim 7, wherein the hydraulic oil supply source is the oil storage member.
9. The anti-bounce control oil circuit of an injection molding machine according to claim 1, wherein the mold opening back pressure control valve comprises a pilot valve and a cartridge main valve, and the pilot valve is connected with the cartridge main valve.
10. The injection molding machine anti-bounce control oil circuit according to any one of claims 1 to 9, wherein the oil storage member is an oil storage tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122384984.6U CN215661712U (en) | 2021-09-29 | 2021-09-29 | Anti-rebound control oil way of injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122384984.6U CN215661712U (en) | 2021-09-29 | 2021-09-29 | Anti-rebound control oil way of injection molding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115846614A (en) * | 2023-03-02 | 2023-03-28 | 宁波力劲科技有限公司 | Automatic oil return die casting machine knockout system and control method |
| CN115889731A (en) * | 2023-02-27 | 2023-04-04 | 宁波力劲科技有限公司 | Knockout control method and knockout system of large die casting machine |
-
2021
- 2021-09-29 CN CN202122384984.6U patent/CN215661712U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115889731A (en) * | 2023-02-27 | 2023-04-04 | 宁波力劲科技有限公司 | Knockout control method and knockout system of large die casting machine |
| CN115846614A (en) * | 2023-03-02 | 2023-03-28 | 宁波力劲科技有限公司 | Automatic oil return die casting machine knockout system and control method |
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