CN118082134A - Hydraulic system and special logistics machine for injection molding machine - Google Patents
Hydraulic system and special logistics machine for injection molding machine Download PDFInfo
- Publication number
- CN118082134A CN118082134A CN202410464975.3A CN202410464975A CN118082134A CN 118082134 A CN118082134 A CN 118082134A CN 202410464975 A CN202410464975 A CN 202410464975A CN 118082134 A CN118082134 A CN 118082134A
- Authority
- CN
- China
- Prior art keywords
- valve
- electromagnetic directional
- cartridge
- loop
- directional valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 22
- 239000003292 glue Substances 0.000 claims abstract description 66
- 238000002347 injection Methods 0.000 claims abstract description 66
- 239000007924 injection Substances 0.000 claims abstract description 66
- 230000009471 action Effects 0.000 claims abstract description 23
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 17
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 7
- 239000004831 Hot glue Substances 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The application relates to the technical field of hydraulic pressure, and discloses a hydraulic system and a special logistics machine of an injection molding machine, wherein the hydraulic system comprises: the device comprises a direct and fast mold locking loop, a high-pressure mold locking loop, a glue injection loop, a nozzle loop, a thimble core pulling loop and a pump station loop, wherein the direct and fast mold locking loop is arranged to control the speed of opening and closing a mold; the high-pressure mold locking loop is used for locking the mold at a preset pressure and maintaining the pressure; the glue injection loop is arranged for adjusting the glue injection speed and the glue melting density through glue injection back pressure and glue melting back pressure; the nozzle loop is arranged to adopt a self-locking nozzle; the ejector pin core-pulling loop is arranged to eject the product while performing a mold opening action; and the pump station loop is respectively communicated with the direct-speed mold locking loop, the high-pressure mold locking loop, the glue injection loop and the ejector pin core pulling loop and is used for supplying oil to the direct-speed mold locking loop, the high-pressure mold locking loop, the glue injection loop and the ejector pin core pulling loop.
Description
Technical Field
The application relates to the technical field of hydraulic pressure, in particular to a hydraulic system and a special logistics machine of an injection molding machine.
Background
With the development of manufacturing technology, production efficiency improves, because injection molding machine commodity circulation special plane can improve the degree of automation of plastic products greatly, reduces manufacturing cost, improves production efficiency, reduces workman's intensity of labour simultaneously, and the application of injection molding machine commodity circulation special plane expands gradually. The hydraulic system which is stable and can realize various working conditions is particularly critical in the process of producing and manufacturing products by the special logistics machine.
At present, a hydraulic system specially applied to an injection molding machine logistics special machine is lacking.
Disclosure of Invention
The application mainly aims to provide a hydraulic system and an injection molding machine logistics special machine, so as to solve the technical problem that the hydraulic system specially applied to the injection molding machine logistics special machine is lacked in the prior art.
According to one aspect of the present application, there is provided a hydraulic system applied to an injection molding machine logistics special machine, comprising: the device comprises a direct and fast mold locking loop, a high-pressure mold locking loop, a glue injection loop, a nozzle loop, a thimble core pulling loop and a pump station loop, wherein the direct and fast mold locking loop is arranged to control the speed of opening and closing a mold; the high-pressure mold locking loop is used for locking the mold at a preset pressure and maintaining the pressure; the glue injection loop is arranged for adjusting the glue injection speed and the glue melting density through glue injection back pressure and glue melting back pressure; the nozzle loop is arranged to adopt a self-locking nozzle; the ejector pin core-pulling loop is arranged to eject the product while performing a mold opening action; and the pump station loop is respectively communicated with the direct-speed mold locking loop, the high-pressure mold locking loop, the glue injection loop and the ejector pin core pulling loop and is used for supplying oil to the direct-speed mold locking loop, the high-pressure mold locking loop, the glue injection loop and the ejector pin core pulling loop.
Optionally, the direct fast mode locking loop includes: the system comprises a first overflow valve, a second overflow valve, a first electromagnetic directional valve, a second electromagnetic directional valve, a third electromagnetic directional valve, a first cartridge valve, a second cartridge valve, a third cartridge valve, a fourth cartridge valve, an electrohydraulic proportional directional valve, a first lifting valve and a second lifting valve, wherein the second electromagnetic directional valve is a pilot control valve of the third cartridge valve, the first electromagnetic directional valve is a pilot control valve of the first cartridge valve, and the third electromagnetic directional valve is a pilot control valve of the fourth cartridge valve; the third cartridge valve is connected with the first cartridge valve and the second cartridge valve respectively, the first overflow valve is connected with the first electromagnetic directional valve and the second overflow valve respectively, and the electro-hydraulic proportional directional valve is connected with the fourth cartridge valve, the third cartridge valve and the oil cylinder respectively.
Optionally, when the electro-hydraulic proportional reversing valve is positioned at the left position and the third electromagnetic reversing valve is positioned at the right position, oil enters a rod cavity of the oil cylinder through the fourth cartridge valve, the piston is pushed to perform a die assembly action, and the oil in the rod cavity returns to the oil tank through the third cartridge valve; when the first electromagnetic reversing valve is positioned at the right position, the first cartridge valve is opened, and oil returns to the oil tank through the first cartridge valve and the third cartridge valve at the same time; when the die is close to the end position, the first electromagnetic directional valve is switched to the left position, and the action of the first cartridge valve is controlled by the electro-hydraulic proportional directional valve so as to improve the cycle period of the machine; when the electro-hydraulic proportional reversing valve is positioned at the right position and the third electromagnetic reversing valve is positioned at the right position, oil enters a rodless cavity of the oil cylinder to push the piston to finish the die opening action; oil liquid with a rod cavity enters the rodless cavity through a second cartridge valve; when the second electromagnetic reversing valve is positioned at the right position, the third cartridge valve is closed to form a differential connection speed increasing loop, so that the die opening speed is increased.
Optionally, the high-voltage mode-locking circuit comprises: the system comprises a third overflow valve, a third lifting valve, a fourth lifting valve, a fifth cartridge valve, a sixth cartridge valve, a seventh cartridge valve, an eighth cartridge valve, a ninth cartridge valve, a first shuttle valve, a first energy accumulator, a fourth electromagnetic directional valve, a fifth electromagnetic directional valve, a sixth electromagnetic directional valve, a seventh electromagnetic directional valve and a needle valve, wherein the fourth lifting valve is a pilot control valve of the fifth cartridge valve, the fourth electromagnetic directional valve is a pilot control valve of the sixth cartridge valve, the fifth electromagnetic directional valve is a pilot control valve of the seventh cartridge valve, the seventh electromagnetic directional valve is a pilot control valve of the ninth cartridge valve, and the sixth electromagnetic directional valve is a pilot control valve of the eighth cartridge valve; the seventh cartridge valve is connected with the sixth cartridge valve and the ninth cartridge valve respectively; the fourth electromagnetic directional valve, the fifth electromagnetic directional valve, the seventh electromagnetic directional valve and the sixth electromagnetic directional valve are connected with each other.
Optionally, when the fourth electromagnetic directional valve, the fifth electromagnetic directional valve, the sixth electromagnetic directional valve and the seventh electromagnetic directional valve are positioned at the right position, oil enters a rod cavity of the oil cylinder through the seventh cartridge valve and the fifth cartridge valve, the mold locking oil cylinder locks the mold, and the oil without the rod cavity returns to the oil tank through the eighth cartridge valve; when the fourth lifting valve and the sixth electromagnetic directional valve are positioned at the right position and the fourth electromagnetic directional valve and the fifth electromagnetic directional valve are positioned at the left position, the mold locking oil cylinder is depressurized; the first energy accumulator is arranged for maintaining pressure of the mold locking oil cylinder; the third lifting valve is arranged to discharge the gas in the mold locking oil cylinder before the machine adjustment; and a needle valve arranged to shut off the oil passage of the first accumulator.
Optionally, the glue injection circuit includes: the hydraulic system comprises a second energy accumulator, a hydraulic lock, an eighth electromagnetic directional valve, a ninth electromagnetic directional valve, a tenth electromagnetic directional valve, an eleventh electromagnetic directional valve, a twelfth electromagnetic directional valve, a tenth cartridge valve, an eleventh cartridge valve, a twelfth cartridge valve, a thirteenth cartridge valve, a fourth overflow valve and a proportional overflow valve, wherein the twelfth electromagnetic directional valve is a pilot control valve of the tenth cartridge valve, and the proportional overflow valve, the tenth electromagnetic directional valve, the ninth electromagnetic directional valve and the fourth overflow valve are multistage regulation pilot control valves of the thirteenth cartridge valve; the hydraulic lock is connected with an eighth electromagnetic directional valve, the eleventh electromagnetic directional valve is connected with an eleventh cartridge valve and a twelfth cartridge valve respectively, the ninth electromagnetic directional valve is connected with a proportional overflow valve, the tenth cartridge valve is connected with the eleventh cartridge valve, the eleventh cartridge valve is connected with the twelfth cartridge valve, and the twelfth cartridge valve is connected with the thirteenth cartridge valve.
Optionally, when the eighth electromagnetic directional valve is located at the middle position, the hydraulic lock does not pass through oil, and the injection oil cylinder is locked; when the eighth electromagnetic directional valve is positioned at the left position, oil enters the rodless cavity, and the injection seat advances; when the eighth electromagnetic directional valve is positioned at the right position, oil enters the rod cavity, and the injection seat retreats; when the ninth electromagnetic reversing valve is positioned at the right position, the back pressure of the melt adhesive can be adjusted in a stepless manner through the proportional overflow valve; when the ninth electromagnetic reversing valve is positioned at the left position, zero back pressure of the melt adhesive is realized; when the ninth electromagnetic reversing valve is positioned at the middle position, glue injection pressure maintaining is realized; when the eleventh electromagnetic directional valve and the twelfth electromagnetic directional valve are positioned at the right position, the tenth cartridge valve and the twelfth cartridge valve are opened, oil enters a rod cavity of the incident rubber cylinder, a piston rod is pushed to advance, and rubber injection is executed; when the eleventh electromagnetic directional valve is positioned at the left position and the ninth electromagnetic directional valve is positioned at the right position, the eleventh cartridge valve is opened, oil enters a rodless cavity of the incident rubber cylinder, a piston rod is pushed to retreat, and the shooting and retreating actions are executed; after the glue injection is finished, the ninth electromagnetic reversing valve is positioned at the left position, and pressure maintaining is started; when the tenth electromagnetic reversing valve is positioned at the right position, the glue injection cylinder is depressurized; and the second energy accumulator is used for adjusting pressure fluctuation generated during glue injection.
Optionally, the pump station circuit comprises: the system comprises a fifth lifting valve, a sixth lifting valve, a fifth overflow valve, a fourteenth cartridge valve, a second shuttle valve, a first pump, a second pump, a third pump, a fourth pump and a fifth pump, wherein the sixth lifting valve is a pilot control valve of the fourteenth cartridge valve, and the second shuttle valve is respectively connected with the sixth lifting valve and the fourteenth cartridge valve; a fifth poppet valve provided to exhaust gas; the first pump, the second pump and the third pump are respectively communicated with the direct and fast mode locking loop, the high-pressure mode locking loop and the glue injection loop, and the fourth pump and the fifth pump are respectively communicated with the thimble core pulling loop.
Optionally, the pump station circuit further comprises: the device comprises a first oil cooling pump set and a second oil cooling pump set, wherein the first oil cooling pump set is used for cooling hot melt adhesive; the second oil cooling pump group is arranged for cooling by the hydraulic system.
According to another aspect of the application, there is also provided an injection molding machine dedicated logistics machine, comprising the hydraulic system of any of the above embodiments.
In the present application, there is provided a hydraulic system applied to an injection molding machine logistics special machine, comprising: the device comprises a direct and fast mold locking loop, a high-pressure mold locking loop, a glue injection loop, a nozzle loop, a thimble core pulling loop and a pump station loop, wherein the direct and fast mold locking loop is arranged to control the speed of opening and closing a mold; the high-pressure mold locking loop is used for locking the mold at a preset pressure and maintaining the pressure; the glue injection loop is arranged for adjusting the glue injection speed and the glue melting density through glue injection back pressure and glue melting back pressure; the nozzle loop is arranged to adopt a self-locking nozzle; the ejector pin core-pulling loop is arranged to eject the product while performing a mold opening action; and the pump station loop is respectively communicated with the direct-speed mold locking loop, the high-pressure mold locking loop, the glue injection loop and the ejector pin core pulling loop and is used for supplying oil to the direct-speed mold locking loop, the high-pressure mold locking loop, the glue injection loop and the ejector pin core pulling loop. The technical effects of improving the die sinking precision of the special logistics machine of the injection molding machine, accelerating the response speed of the system, improving the yield of plastic products and reducing the production and maintenance cost are achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a block diagram of a hydraulic system according to an embodiment of the present disclosure;
FIG. 2 is a hydraulic schematic of a direct fast mode locking circuit according to an embodiment of the present application;
FIG. 3 is a hydraulic schematic of a high pressure mode locking circuit according to an embodiment of the present application;
FIG. 4 is a hydraulic schematic of a glue injection circuit according to an embodiment of the application;
FIG. 5 is a hydraulic schematic of a nozzle circuit according to an embodiment of the application;
FIG. 6 is a hydraulic schematic diagram of a thimble core-pulling circuit according to an embodiment of the present application;
FIG. 7 is a hydraulic schematic of a pump station circuit according to an embodiment of the application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 is a block diagram of a hydraulic system according to an embodiment of the present application, which is applied to a special logistics machine of an injection molding machine, as shown in fig. 1, and includes: a direct and fast mode locking loop 1, a high-pressure mode locking loop 2, a glue injection loop 3, a nozzle loop 4, a thimble core-pulling loop 5 and a pump station loop 6, wherein,
The direct and fast mold locking loop 1 is arranged to control the speed of opening and closing the mold;
The high-pressure mold locking loop 2 is arranged to lock and hold the mold at a preset pressure;
The glue injection loop 3 is arranged to adjust the glue injection speed and the glue melting density through glue injection back pressure and glue melting back pressure;
The nozzle loop 4 is arranged to adopt a self-locking nozzle;
The ejector pin core-pulling loop 5 is arranged to eject the product while performing a mold opening action;
And the pump station loop 6 is respectively communicated with the straight fast mold locking loop 1, the high-pressure mold locking loop 2, the glue injection loop 3 and the thimble core pulling loop 5 and is used for supplying oil to the straight fast mold locking loop 1, the high-pressure mold locking loop 2, the glue injection loop 3 and the thimble core pulling loop 5.
Through the device, the technical effects of improving the die sinking precision of the special logistics machine of the injection molding machine, accelerating the response speed of the system, improving the yield of plastic products and reducing the production and maintenance cost are realized.
Fig. 2 is a hydraulic schematic diagram of a direct fast mode locking circuit according to an embodiment of the present application, and as shown in fig. 2, the direct fast mode locking circuit 1 includes: a first relief valve 101, a second relief valve 112, a first electromagnetic directional valve 102, a second electromagnetic directional valve 106, a third electromagnetic directional valve 110, a first cartridge valve 103, a second cartridge valve 104, a third cartridge valve 105, a fourth cartridge valve 111, an electro-hydraulic proportional directional valve 107, a first poppet valve 108, and a second poppet valve 109, wherein,
The second electromagnetic directional valve 106 is a pilot control valve of the third cartridge valve 105, the first electromagnetic directional valve 102 is a pilot control valve of the first cartridge valve 103, and the third electromagnetic directional valve 110 is a pilot control valve of the fourth cartridge valve 111; the third cartridge valve 105 is connected with the first cartridge valve 103 and the second cartridge valve 104 respectively, the first overflow valve 101 is connected with the first electromagnetic directional valve 102 and the second overflow valve 112 respectively, and the electro-hydraulic proportional directional valve 107 is connected with the fourth cartridge valve 111, the third cartridge valve 105 and the oil cylinder respectively.
The port B of the electro-hydraulic proportional directional valve 107 is connected to the fourth cartridge valve 111, the port a is connected to the cylinder, and the port T is connected to the third cartridge valve 105.
According to an alternative embodiment of the application, when the electro-hydraulic proportional directional valve 107 is positioned at the left position and the third electromagnetic directional valve 110 is positioned at the right position, oil enters a rod cavity of the oil cylinder through the fourth cartridge valve 111, the piston is pushed to perform a die assembly action, and the oil in the rodless cavity returns to the oil tank through the third cartridge valve 105; when the first electromagnetic directional valve 102 is located at the right position, the first cartridge valve 103 is opened, oil returns to the oil tank through the first cartridge valve 103 and the third cartridge valve 105 at the same time, oil return flow is increased, and die assembly speed is increased.
When the die closing approaches to the end position, the first electromagnetic directional valve 102 is switched to the left position, and the action of the first cartridge valve 103 is controlled by the electro-hydraulic proportional directional valve 107 to improve the cycle period of the machine.
When the first electromagnetic directional valve 102 is switched to the left position, the first cartridge valve 103 is closed, the whole loop is buffered through the electro-hydraulic proportional directional valve 107, and the position accuracy of die assembly is controlled.
When the electro-hydraulic proportional reversing valve 107 is positioned at the right position and the third electromagnetic reversing valve 110 is positioned at the right position, oil enters a rodless cavity of the oil cylinder to push the piston to finish the die opening action; oil with a rod cavity enters the rodless cavity through the second cartridge valve 104; when the second electromagnetic directional valve 106 is positioned at the right position, the third cartridge valve 105 is closed, a differential connection speed increasing loop is formed, and the die opening speed is increased.
Fig. 3 is a hydraulic schematic diagram of a high-pressure mode-locking circuit according to an embodiment of the present application, and as shown in fig. 3, the high-pressure mode-locking circuit 2 includes: a third relief valve 201, a third poppet valve 202, a fourth poppet valve 203, a fifth cartridge valve 204, a sixth cartridge valve 210, a seventh cartridge valve 211, an eighth cartridge valve 214, a ninth cartridge valve 215, a first shuttle valve 205, a first accumulator 206, a fourth electromagnetic directional valve 207, a fifth electromagnetic directional valve 208, a sixth electromagnetic directional valve 212, a seventh electromagnetic directional valve 213, and a needle valve 209, wherein,
The fourth poppet valve 203 is a pilot control valve of the fifth cartridge valve 204, the fourth electromagnetic directional valve 207 is a pilot control valve of the sixth cartridge valve 210, the fifth electromagnetic directional valve 208 is a pilot control valve of the seventh cartridge valve 211, the seventh electromagnetic directional valve 213 is a pilot control valve of the ninth cartridge valve 215, and the sixth electromagnetic directional valve 212 is a pilot control valve of the eighth cartridge valve 214; the seventh cartridge valve 211 is connected to the sixth cartridge valve 210 and the ninth cartridge valve 215, respectively; the fourth electromagnetic directional valve 207, the fifth electromagnetic directional valve 208, the seventh electromagnetic directional valve 213, and the sixth electromagnetic directional valve 212 are connected to each other.
According to an alternative embodiment of the present application, when the fourth electromagnetic directional valve 207, the fifth electromagnetic directional valve 208, the sixth electromagnetic directional valve 212 and the seventh electromagnetic directional valve 213 are located at the right position, the oil enters the other three cylinders with rod cavities of the upper left cylinder through the seventh cartridge valve 211 and the fifth cartridge valve 204, and the mold locking cylinder is pressurized to lock the mold, and the oil without rod cavities returns to the oil tank through the eighth cartridge valve 214.
When the fourth and sixth electromagnetic directional valves 203, 212 are positioned at the right position and the fourth and fifth electromagnetic directional valves 207, 208 are positioned at the left position, the die lock cylinder is depressurized.
The first accumulator 206 is configured to hold pressure on the mold-locking cylinder. The first accumulator 206 is used as a control oil source of the cartridge valve, and provides a path of stable control oil which is not affected by load change through the accumulator, so that the cartridge valve is ensured not to be opened or uncontrolled to cause misoperation due to the change of external load, and the control stability of the machine is improved.
Third poppet 202 is provided to vent gas from the mold cylinder before trimming. Before the machine is adjusted, the third poppet valve 202 is switched to the right position, so that air in the cylinder can be rapidly exhausted through one-time mold opening action, and the time required by repeated mold opening and closing of the existing machine is greatly reduced.
A needle valve 209 is provided to shut off the oil passage of the first accumulator 206. When the machine is maintained, the needle valve 209 is closed, so that the oil way of the energy accumulator can be cut off, the oil can not be sprayed out, and the maintenance of the machine is facilitated.
Fig. 4 is a hydraulic schematic diagram of a glue injection circuit according to an embodiment of the present application, and as shown in fig. 4, the glue injection circuit 3 includes: a second accumulator 301, a hydraulic lock 302, an eighth electromagnetic directional valve 303, a ninth electromagnetic directional valve 309, a tenth electromagnetic directional valve 310, an eleventh electromagnetic directional valve 312, a twelfth electromagnetic directional valve 313, a tenth cartridge valve 304, an eleventh cartridge valve 305, a twelfth cartridge valve 306, a thirteenth cartridge valve 307, a fourth overflow valve 308, and a proportional overflow valve 311, wherein,
The twelfth electromagnetic directional valve 313 is a pilot control valve of the tenth cartridge valve 304, and the proportional overflow valve 311, the tenth electromagnetic directional valve 310, the ninth electromagnetic directional valve 309, and the fourth overflow valve 308 are multistage regulating pilot control valves of the thirteenth cartridge valve 307; the hydraulic lock 302 is connected to the eighth electromagnetic directional valve 303, the eleventh electromagnetic directional valve 312 is connected to the eleventh cartridge valve 305 and the twelfth cartridge valve 306, respectively, the ninth electromagnetic directional valve 309 is connected to the proportional overflow valve 311, the tenth cartridge valve 304 is connected to the eleventh cartridge valve 305, the eleventh cartridge valve 305 is connected to the twelfth cartridge valve 306, and the twelfth cartridge valve 306 is connected to the thirteenth cartridge valve 307.
According to an alternative embodiment of the present application, when the eighth electromagnetic directional valve 303 is located at the middle position, the hydraulic lock 302 does not have oil passing through, and the injection cylinder is locked; when the eighth electromagnetic directional valve 303 is positioned at the left position, oil enters the rodless cavity, and the injection seat advances; when the eighth electromagnetic directional valve 303 is positioned at the right position, oil enters the rod cavity, and the injection seat retreats.
When the ninth electromagnetic directional valve 309 is positioned at the right position, the back pressure of the melt adhesive can be adjusted in a stepless way through the proportional overflow valve 311; when the ninth electromagnetic directional valve 309 is in the left position, zero back pressure of the melt adhesive is achieved; when the ninth electromagnetic directional valve 309 is located at the middle position, the glue injection pressure maintaining is realized.
When the eleventh electromagnetic directional valve 312 and the twelfth electromagnetic directional valve 313 are positioned at the right position, the tenth cartridge valve 304 and the twelfth cartridge valve 306 are opened, and the oil enters the rod cavity of the incident glue cylinder to push the piston rod to advance, so as to execute the glue injection action.
When the eleventh electromagnetic directional valve 312 is positioned at the left position and the ninth electromagnetic directional valve 309 is positioned at the right position, the eleventh cartridge valve 305 is opened, oil enters the rodless cavity of the incident rubber cylinder, and pushes the piston rod to retreat, so as to execute the injection and retreat actions.
After the glue injection is finished, the ninth electromagnetic directional valve 309 is positioned at the left position, and pressure maintaining is started; when the tenth electromagnetic directional valve 310 is positioned at the right position, the glue injection cylinder is depressurized. The second accumulator 301 is configured to regulate pressure fluctuations generated during glue injection.
The accumulator and needle valve function in this circuit is the same as in the high pressure mode locking circuit.
Fig. 5 is a hydraulic schematic diagram of a nozzle loop according to an embodiment of the present application, and as shown in fig. 5, the hydraulic system provided in the embodiment of the present application adopts a design of a self-locking nozzle, so that a cold material can be prevented from being formed by flowing out of the melt adhesive from the nozzle, a glue extraction action is omitted, and a product quality is improved.
FIG. 6 is a hydraulic schematic diagram of a core-pulling loop of a thimble according to an embodiment of the present application, as shown in FIG. 6, the core-pulling loop of the thimble adopts a design of synchronous ejection, so that a product can be ejected while performing a mold opening action, thereby improving a cycle period of a machine and improving production efficiency.
Fig. 7 is a hydraulic schematic of a pump station circuit according to an embodiment of the application, as shown in fig. 7, the pump station circuit 6 comprising: fifth poppet 601, sixth poppet 603, fifth relief valve 602, fourteenth cartridge 604, second shuttle valve 605, first pump 606, second pump 607, third pump 608, fourth pump 609, and fifth pump 610, wherein sixth poppet 603 is a pilot control valve for fourteenth cartridge 604, and second shuttle valve 605 is connected to sixth poppet 603 and fourteenth cartridge 604, respectively.
The fifth poppet 601 sets up to the exhaust, and the fifth poppet 601 plays the exhaust effect, can discharge the interior air of pump fast when opening, compares with prior art, and this design can effectively prevent that fluid from flowing backward, improves the life of pump.
The first pump 606, the second pump 607 and the third pump 608 are respectively communicated with the direct mold locking circuit 1, the high-pressure mold locking circuit 2 and the glue injection circuit 3, and the fourth pump 609 and the fifth pump 610 are respectively communicated with the thimble core pulling circuit 5. When a circuit needs to perform a fast action, the sixth poppet 603 is opened and five pumps can simultaneously supply oil to the circuit.
According to an alternative embodiment of the application, the pump station circuit 6 further comprises: a first oil cooling pump unit 611 and a second oil cooling pump unit 612, wherein the first oil cooling pump unit 611 is configured to cool the hot melt adhesive; a second oil cooling pump unit 612 is arranged to cool the hydraulic system.
The hydraulic system provided by the embodiment of the application can realize zero back pressure to adjust the glue melting density of the material. After the mode locking, an energy accumulator can be used for maintaining pressure when the system pressure is insufficient. The energy accumulator can be used for balancing pressure when pressure fluctuation is generated in the injection molding process, and pressure impact generated during instantaneous start-stop of the hydraulic cylinder is absorbed, so that damage to systems and equipment is reduced.
The hydraulic system can optimize the structure of the system, improves the working efficiency of the special logistics machine of the injection molding machine, reduces the production cost and the maintenance cost, and has the advantages of good universality, multiple applicable working conditions, high response speed and the like.
The hydraulic system is provided with an energy accumulator at the glue injection pressure part, and is used for adjusting pressure fluctuation generated during glue injection and balancing pressure; and an energy accumulator is arranged at the mode locking oil path part, when pressure maintaining is needed after injection is finished, if the system pressure is insufficient, the system can automatically form internal feedback, and then the energy accumulator is used for maintaining the pressure of the mode locking oil cylinder, so that the production quality of products is improved, and the rejection rate is reduced. The air in the system can be discharged out quickly before the operation, so that the system can be operated quickly compared with the hydraulic systems of other injection molding machines, and the efficiency is improved. A lifting valve is arranged at the part of the direct and quick mode locking oil path, so that the direct and quick oil cylinder can be subjected to pressure compensation and quick pressure relief. The system is provided with independent cooling, and has better cooling performance and higher cooling efficiency. Synchronous ejection can be realized at the thimble oil way, and ejection is performed while mould opening, so that the efficiency is improved. The design of the system can make all the elements replaced by localization, and the design of partial oil ways can make up for the performance deficiency of the domestic elements, thereby achieving the same effect of foreign imported elements and reducing the influence caused by foreign monopoly.
On the other hand, the embodiment of the application also provides a special logistics machine for the injection molding machine, which comprises the hydraulic system, so that the special logistics machine for the injection molding machine comprises all the technical effects of the hydraulic system. Since the technical effects of the hydraulic system have been described in detail in the foregoing, a detailed description thereof will be omitted.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a hydraulic system, its characterized in that, this hydraulic system is applied to injection molding machine commodity circulation special plane, includes: a direct and fast mode locking loop (1), a high-pressure mode locking loop (2), a glue injection loop (3), a nozzle loop (4), a thimble core-pulling loop (5) and a pump station loop (6), wherein,
The straight and fast mold locking loop (1) is arranged to control the speed of opening and closing the mold;
The high-pressure mold locking loop (2) is used for locking and maintaining the pressure of the mold at a preset pressure;
The glue injection loop (3) is used for adjusting the glue injection speed and the glue melting density through glue injection back pressure and glue melting back pressure;
the nozzle loop (4) is arranged to adopt a self-locking nozzle;
The ejector pin core-pulling loop (5) is arranged to eject the product while performing a mold opening action;
The pump station loop (6) is respectively communicated with the direct fast mode locking loop (1), the high-pressure mode locking loop (2), the glue injection loop (3) and the thimble core pulling loop (5) and is arranged for supplying oil to the direct fast mode locking loop (1), the high-pressure mode locking loop (2), the glue injection loop (3) and the thimble core pulling loop (5).
2. Hydraulic system according to claim 1, characterized in that said direct fast mode locking circuit (1) comprises: a first overflow valve (101), a second overflow valve (112), a first electromagnetic directional valve (102), a second electromagnetic directional valve (106), a third electromagnetic directional valve (110), a first cartridge valve (103), a second cartridge valve (104), a third cartridge valve (105), a fourth cartridge valve (111), an electrohydraulic proportional directional valve (107), a first lifting valve (108) and a second lifting valve (109), wherein,
The second electromagnetic directional valve (106) is a pilot control valve of the third cartridge valve (105), the first electromagnetic directional valve (102) is a pilot control valve of the first cartridge valve (103), and the third electromagnetic directional valve (110) is a pilot control valve of the fourth cartridge valve (111);
The third cartridge valve (105) is respectively connected with the first cartridge valve (103) and the second cartridge valve (104), the first overflow valve (101) is respectively connected with the first electromagnetic directional valve (102) and the second overflow valve (112), and the electro-hydraulic proportional directional valve (107) is respectively connected with the fourth cartridge valve (111), the third cartridge valve (105) and the oil cylinder.
3. The hydraulic system of claim 2, wherein the hydraulic system is configured to,
When the electro-hydraulic proportional reversing valve (107) is positioned at the left position and the third electromagnetic reversing valve (110) is positioned at the right position, oil enters a rod cavity of the oil cylinder through the fourth cartridge valve (111), the piston is pushed to perform a die assembly action, and the oil in the rodless cavity returns to the oil tank through the third cartridge valve (105);
when the first electromagnetic directional valve (102) is positioned at the right position, the first cartridge valve (103) is opened, and oil returns to the oil tank through the first cartridge valve (103) and the third cartridge valve (105) at the same time;
when the die assembly approaches to the end position, the first electromagnetic directional valve (102) is switched to the left position, and the action of the first cartridge valve (103) is controlled by the electro-hydraulic proportional directional valve (107) so as to improve the cycle period of the machine;
When the electro-hydraulic proportional reversing valve (107) is positioned at the right position and the third electromagnetic reversing valve (110) is positioned at the right position, oil enters a rodless cavity of the oil cylinder to push the piston to finish the die opening action;
oil with a rod cavity enters the rodless cavity through the second cartridge valve (104);
When the second electromagnetic directional valve (106) is positioned at the right position, the third cartridge valve (105) is closed to form a differential connection speed increasing loop, so that the die opening speed is increased.
4. Hydraulic system according to claim 1, characterized in that the high-pressure mode-locking circuit (2) comprises: a third relief valve (201), a third poppet valve (202), a fourth poppet valve (203), a fifth cartridge valve (204), a sixth cartridge valve (210), a seventh cartridge valve (211), an eighth cartridge valve (214), a ninth cartridge valve (215), a first shuttle valve (205), a first accumulator (206), a fourth electromagnetic directional valve (207), a fifth electromagnetic directional valve (208), a sixth electromagnetic directional valve (212), a seventh electromagnetic directional valve (213), and a needle valve (209), wherein,
The fourth poppet valve (203) is a pilot control valve of the fifth cartridge valve (204), the fourth electromagnetic directional valve (207) is a pilot control valve of a sixth cartridge valve (210), the fifth electromagnetic directional valve (208) is a pilot control valve of the seventh cartridge valve (211), the seventh electromagnetic directional valve (213) is a pilot control valve of the ninth cartridge valve (215), and the sixth electromagnetic directional valve (212) is a pilot control valve of the eighth cartridge valve (214);
The seventh cartridge valve (211) is connected with the sixth cartridge valve (210) and the ninth cartridge valve (215) respectively;
The fourth electromagnetic directional valve (207), the fifth electromagnetic directional valve (208), the seventh electromagnetic directional valve (213), and the sixth electromagnetic directional valve (212) are connected to each other.
5. The hydraulic system of claim 4, wherein the hydraulic system is configured to,
When the fourth electromagnetic directional valve (207), the fifth electromagnetic directional valve (208), the sixth electromagnetic directional valve (212) and the seventh electromagnetic directional valve (213) are positioned at the right position, oil enters a rod cavity of an oil cylinder through the seventh cartridge valve (211) and the fifth cartridge valve (204), the mold locking oil cylinder locks the mold, and the oil in the rodless cavity returns to the oil tank through the eighth cartridge valve (214);
when the fourth lifting valve (203) and the sixth electromagnetic directional valve (212) are positioned at the right position, and the fourth electromagnetic directional valve (207) and the fifth electromagnetic directional valve (208) are positioned at the left position, the die locking oil cylinder is depressurized;
The first energy accumulator (206) is used for maintaining pressure of the mold locking oil cylinder;
The third lifting valve (202) is arranged to discharge gas in the mold locking oil cylinder before the machine adjustment;
The needle valve (209) is configured to shut off an oil passage of the first accumulator (206).
6. Hydraulic system according to claim 1, characterized in that the glue injection circuit (3) comprises: a second accumulator (301), a hydraulic lock (302), an eighth electromagnetic directional valve (303), a ninth electromagnetic directional valve (309), a tenth electromagnetic directional valve (310), an eleventh electromagnetic directional valve (312), a twelfth electromagnetic directional valve (313), a tenth cartridge valve (304), an eleventh cartridge valve (305), a twelfth cartridge valve (306), a thirteenth cartridge valve (307), a fourth overflow valve (308), and a proportional overflow valve (311), wherein,
The twelfth electromagnetic directional valve (313) is a pilot control valve of the tenth cartridge valve (304), and the proportional overflow valve (311), the tenth electromagnetic directional valve (310), the ninth electromagnetic directional valve (309) and the fourth overflow valve (308) are multistage regulating pilot control valves of the thirteenth cartridge valve (307);
The hydraulic lock (302) is connected with the eighth electromagnetic directional valve (303), the eleventh electromagnetic directional valve (312) is respectively connected with the eleventh cartridge valve (305) and the twelfth cartridge valve (306), the ninth electromagnetic directional valve (309) is connected with the proportional overflow valve (311), the tenth cartridge valve (304) is connected with the eleventh cartridge valve (305), the eleventh cartridge valve (305) is connected with the twelfth cartridge valve (306), and the twelfth cartridge valve (306) is connected with the thirteenth cartridge valve (307).
7. The hydraulic system of claim 6, wherein the hydraulic system is configured to,
When the eighth electromagnetic directional valve (303) is positioned in the middle position, the hydraulic lock (302) does not pass through oil, and the injection oil cylinder is locked; when the eighth electromagnetic directional valve (303) is positioned at the left position, oil enters the rodless cavity, and the injection seat advances; when the eighth electromagnetic directional valve (303) is positioned at the right position, oil enters a rod cavity, and the injection seat retreats;
when the ninth electromagnetic directional valve (309) is positioned at the right position, the back pressure of the melt adhesive can be adjusted in an electrodeless manner through the proportional overflow valve (311); when the ninth electromagnetic directional valve (309) is positioned at the left position, zero back pressure of the melt adhesive is realized; when the ninth electromagnetic reversing valve (309) is positioned in the middle position, glue injection pressure maintaining is realized;
When the eleventh electromagnetic directional valve (312) and the twelfth electromagnetic directional valve (313) are positioned at the right position, the tenth cartridge valve (304) and the twelfth cartridge valve (306) are opened, oil enters a rod cavity of an incident rubber cylinder, a piston rod is pushed to advance, and a rubber injection action is executed;
When the eleventh electromagnetic directional valve (312) is positioned at the left position and the ninth electromagnetic directional valve (309) is positioned at the right position, the eleventh cartridge valve (305) is opened, oil enters a rodless cavity of the incident rubber cylinder, and pushes a piston rod to retreat, so that the jet-backing action is executed;
after the glue injection is finished, the ninth electromagnetic reversing valve (309) is positioned at the left position, and pressure maintaining is started;
when the tenth electromagnetic directional valve (310) is positioned at the right position, the glue injection cylinder is depressurized;
the second accumulator (301) is configured to regulate pressure fluctuations generated during glue injection.
8. The hydraulic system according to claim 1, characterized in that the pump station circuit (6) comprises: a fifth poppet (601), a sixth poppet (603), a fifth relief valve (602), a fourteenth cartridge (604), a second shuttle valve (605), a first pump (606), a second pump (607), a third pump (608), a fourth pump (609), and a fifth pump (610), wherein,
The sixth poppet valve (603) is a pilot control valve of the fourteenth cartridge valve (604), and the second shuttle valve (605) is connected with the sixth poppet valve (603) and the fourteenth cartridge valve (604) respectively;
The fifth poppet (601) is configured to exhaust gas;
The first pump (606), the second pump (607) and the third pump (608) are respectively communicated with the direct fast mode locking loop (1), the high-pressure mode locking loop (2) and the glue injection loop (3), and the fourth pump (609) and the fifth pump (610) are respectively communicated with the thimble core pulling loop (5).
9. The hydraulic system according to claim 8, wherein the pump station circuit (6) further comprises: a first oil cooling pump set (611) and a second oil cooling pump set (612), wherein,
The first oil cooling pump set (611) is configured to cool the hot melt adhesive;
The second oil cooling pump set (612) is configured to cool the hydraulic system.
10. An injection molding machine special logistics machine comprising a hydraulic system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410464975.3A CN118082134A (en) | 2024-04-18 | 2024-04-18 | Hydraulic system and special logistics machine for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410464975.3A CN118082134A (en) | 2024-04-18 | 2024-04-18 | Hydraulic system and special logistics machine for injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118082134A true CN118082134A (en) | 2024-05-28 |
Family
ID=91156485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410464975.3A Pending CN118082134A (en) | 2024-04-18 | 2024-04-18 | Hydraulic system and special logistics machine for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118082134A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09267373A (en) * | 1996-04-01 | 1997-10-14 | Meiki Co Ltd | Booster ram type mold-clamping apparatus and method for injection compression molding using booster ram type mold clamping apparatus |
| CN200963900Y (en) * | 2006-11-03 | 2007-10-24 | 广东佳明机器有限公司 | Die sinking, preplasticizing and pushing out synchronization movement circuit for injection molding machine |
| CN102001167A (en) * | 2010-09-07 | 2011-04-06 | 华南理工大学 | Plunger pump type hydraulic injection moulding machine system driven by servo motor and control method thereof |
| KR20150091643A (en) * | 2014-02-03 | 2015-08-12 | 엘에스엠트론 주식회사 | Half-nut clamping device with variable velocity for injection molding machine |
| CN105538626A (en) * | 2016-01-25 | 2016-05-04 | 海天塑机集团有限公司 | Injection molding machine micro mould opening system and oil way control method thereof |
| CN208232272U (en) * | 2017-09-14 | 2018-12-14 | 广东科仕特精密机械有限公司 | A kind of hydraulic control device that novel injection moulding machine unlocking mold is synchronous with melten gel |
| CN109466035A (en) * | 2017-09-07 | 2019-03-15 | 海天塑机集团有限公司 | Injection molding machine open mold hydraulic control system and injection molding machine |
| WO2020015383A1 (en) * | 2018-07-17 | 2020-01-23 | 扬力集团股份有限公司 | Oil-electric hybrid driving environment-friendly energy-saving servo hydraulic press machine |
| CN110757751A (en) * | 2019-09-29 | 2020-02-07 | 宁波力劲机械有限公司 | Oil circuit system of direct and fast clamping mechanism of two-plate injection molding machine for spring mold |
| CN113771320A (en) * | 2021-08-17 | 2021-12-10 | 宁波长飞亚塑料机械制造有限公司 | Differential mode locking pressure relief oil way for two-plate injection molding machine |
-
2024
- 2024-04-18 CN CN202410464975.3A patent/CN118082134A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09267373A (en) * | 1996-04-01 | 1997-10-14 | Meiki Co Ltd | Booster ram type mold-clamping apparatus and method for injection compression molding using booster ram type mold clamping apparatus |
| CN200963900Y (en) * | 2006-11-03 | 2007-10-24 | 广东佳明机器有限公司 | Die sinking, preplasticizing and pushing out synchronization movement circuit for injection molding machine |
| CN102001167A (en) * | 2010-09-07 | 2011-04-06 | 华南理工大学 | Plunger pump type hydraulic injection moulding machine system driven by servo motor and control method thereof |
| KR20150091643A (en) * | 2014-02-03 | 2015-08-12 | 엘에스엠트론 주식회사 | Half-nut clamping device with variable velocity for injection molding machine |
| CN105538626A (en) * | 2016-01-25 | 2016-05-04 | 海天塑机集团有限公司 | Injection molding machine micro mould opening system and oil way control method thereof |
| CN109466035A (en) * | 2017-09-07 | 2019-03-15 | 海天塑机集团有限公司 | Injection molding machine open mold hydraulic control system and injection molding machine |
| CN208232272U (en) * | 2017-09-14 | 2018-12-14 | 广东科仕特精密机械有限公司 | A kind of hydraulic control device that novel injection moulding machine unlocking mold is synchronous with melten gel |
| WO2020015383A1 (en) * | 2018-07-17 | 2020-01-23 | 扬力集团股份有限公司 | Oil-electric hybrid driving environment-friendly energy-saving servo hydraulic press machine |
| CN110757751A (en) * | 2019-09-29 | 2020-02-07 | 宁波力劲机械有限公司 | Oil circuit system of direct and fast clamping mechanism of two-plate injection molding machine for spring mold |
| CN113771320A (en) * | 2021-08-17 | 2021-12-10 | 宁波长飞亚塑料机械制造有限公司 | Differential mode locking pressure relief oil way for two-plate injection molding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111442001B (en) | Oil circuit structure for double closed-loop control of injection speed and injection force and control mode | |
| CN105538625B (en) | A kind of injection machine synchronization system and its oil circuit control method | |
| CN108150468B (en) | Hydraulic press hydraulic system capable of quickly and stably realizing local loading | |
| CN100999129A (en) | Water moulding water-fluid pressure ratio system | |
| CN105415731B (en) | A kind of hydraulic system suitable for water hydraulic die casting machine | |
| CN115889731B (en) | Material beating control method and material beating system of large die casting machine | |
| US7004224B2 (en) | Diecasting machine | |
| CN105538623B (en) | A kind of crack modular system of improved type injection molding machine and its oil circuit control method | |
| CN118082134A (en) | Hydraulic system and special logistics machine for injection molding machine | |
| CN103042667A (en) | High-speed mould opening-closing hydraulic loop system | |
| CN111251566B (en) | High-speed high-precision injection molding machine hydraulic control loop and method | |
| CN209738222U (en) | Die sinking hydraulic control system of injection molding machine | |
| CN105538624A (en) | Mould clamping system for injection molding machine and oil way control method for mould clamping system for injection molding machine | |
| CN210880725U (en) | Unlocking die hydraulic control system and compression molding equipment | |
| CN105538626A (en) | Injection molding machine micro mould opening system and oil way control method thereof | |
| CN205522359U (en) | Injection molding machine synchronization system | |
| CN205255553U (en) | Water hydraulic pressure die casting machine and hydraulic system thereof | |
| CN111070598A (en) | Multi-mode locking hydraulic oil way structure of injection molding machine and multi-mode locking steps thereof | |
| CN211968331U (en) | A locking oil circuit that moves back of storage screw rod for foaming special injection molding machine a little | |
| CN211891837U (en) | Multiple mode locking hydraulic oil circuit structure of injection molding machine | |
| CN210705967U (en) | Oil circuit control system of injection blow molding machine mould clamping mechanism | |
| CN202151893U (en) | Constant-pressure water-assisted injection molding equipment | |
| CN213198666U (en) | Differential hydraulic system for mold opening of injection molding machine | |
| CN219076444U (en) | Novel synchronous regulation reset loop of die clamping pull rod of injection molding machine | |
| CN215661711U (en) | Mold opening backpressure control loop of injection molding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |