CN218477086U - Mould opening and closing hydraulic system of injection molding machine - Google Patents
Mould opening and closing hydraulic system of injection molding machine Download PDFInfo
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- CN218477086U CN218477086U CN202220894913.2U CN202220894913U CN218477086U CN 218477086 U CN218477086 U CN 218477086U CN 202220894913 U CN202220894913 U CN 202220894913U CN 218477086 U CN218477086 U CN 218477086U
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Abstract
The utility model discloses an injection molding machine mold opening and closing hydraulic system, which comprises a mold moving oil cylinder, a three-position four-way directional valve, a two-way cartridge valve, a proportional overflow valve, a main oil inlet and a main oil return port; a first working oil port of the three-position four-way directional valve is communicated with a rod cavity of the mold moving oil cylinder, a second working oil port of the three-position four-way directional valve is communicated with a rodless cavity of the mold moving oil cylinder, and an oil inlet of the three-position four-way directional valve is communicated with a main oil inlet; an oil inlet of the two-way cartridge valve is communicated with an oil outlet of the three-position four-way directional valve, and the oil outlet of the two-way cartridge valve is communicated with an oil return port; the oil inlet of the proportional overflow valve is communicated with the control oil port of the two-way cartridge valve, the oil outlet of the proportional overflow valve is communicated with the oil return port, and the proportional overflow valve is used for controlling the pressure of the two-way cartridge valve. It can reduce cost and can do benefit to enterprise's expanded production.
Description
Technical Field
The utility model relates to an injection molding machine technical field especially relates to an injection molding machine mould hydraulic system that opens and shuts.
Background
The injection molding machine mold opening and closing hydraulic system is a structure for controlling the mold opening and closing action of the injection molding machine, and meanwhile, a high-speed ratio proportional direction valve is arranged in the injection molding machine mold opening and closing hydraulic system to control the mold transfer to be accurately stopped when the movement needs to be stopped, namely the mold transfer is braked.
However, the high-speed proportional control valve is expensive, the supply period is long, the high-speed proportional control valve is not beneficial to cost reduction and production expansion of enterprises, the oil cavity of the mold moving oil cylinder is divided into a rod cavity and a rodless cavity by a piston, the difference between the oil inlet amount and the oil outlet amount of the rod cavity and the rodless cavity is large, and the oil inlet-return ratio of the high-speed proportional control valve is 1:1, need to carry out the structural transformation to the proportional control valve, complex operation, the degree of difficulty is big moreover, has further increased the cost.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an injection molding machine mould opening and closing hydraulic system, which can reduce the cost and can be beneficial to the enterprise to enlarge the production.
The purpose of the utility model is realized by adopting the following technical scheme:
the mold opening and closing hydraulic system of the injection molding machine comprises a mold moving oil cylinder, a three-position four-way directional valve, a two-way cartridge valve, a proportional overflow valve, a main oil inlet and a main oil return port;
a first working oil port of the three-position four-way directional valve is communicated with a rod cavity of the mold moving oil cylinder, a second working oil port of the three-position four-way directional valve is communicated with a rodless cavity of the mold moving oil cylinder, and an oil inlet of the three-position four-way directional valve is communicated with the main oil inlet;
an oil inlet of the two-way cartridge valve is communicated with an oil outlet of the three-position four-way directional valve, and an oil outlet of the two-way cartridge valve is communicated with the oil return port;
the oil inlet of the proportional overflow valve is communicated with the control oil port of the two-way cartridge valve, the oil outlet of the proportional overflow valve is communicated with the oil return port, and the proportional overflow valve is used for controlling the pressure of the two-way cartridge valve.
Further, the three-position four-way directional valve is a hydraulic control valve.
Furthermore, the three-position four-way directional valve is an electromagnetic valve or a pneumatic valve.
Further, the two-way cartridge valve is an electromagnetic valve.
Further, the two-way cartridge valve is a hydraulic control valve or a pneumatic valve.
Further, the proportional overflow valve is an electromagnetic valve.
Further, the proportional overflow valve is a hydraulic control valve or a pneumatic valve.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses an injection molding machine mould hydraulic system that opens and shuts, through set up cartridge valve and proportion overflow valve between the oil-out and the total oil return opening at three-position four-way direction valve, also set up cartridge valve and proportion overflow valve on this hydraulic system's oil return main road and act as the brake valve group, in the mould in-process that opens and shuts, pressure through proportion overflow valve control cartridge valve can realize providing oil return backpressure pressure for this hydraulic system, also realize providing inertial motion's resistance for the mould moving hydro-cylinder, make the mould moving hydro-cylinder stop action as early as possible, reach the purpose of quick steady brake, in this structure, backpressure pressure is controlled through the proportion overflow valve, one comes proportion overflow valve response fast, two comes backpressure pressure adjustable and programmable, make backpressure pressure can be by little to big, make the resistance that is used in on the mould moving hydro-cylinder gradually change effect, the action is more steady, avoid resistance coming to cause the mould moving action impact suddenly, pause, reducible vibration, simultaneously, this structure accessible adjustment backpressure pressure and cartridge valve through-path can be applicable to different tonnages, the locking mechanism that different flow rate required, and the scope of application is wide, and the cost of the simple high-rate of the cost of the simple structure of the cost of the combination of the simple overflow valve that also can be reduced of the high pressure of the cost of the whole system that does benefit to the cost of the enterprise, therefore, the cost of the whole cost of the high cost of the simple delivery system is reduced simultaneously, thereby, the cost of the enterprise is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the mold opening and closing hydraulic system of the injection molding machine of the present invention.
In the figure: 10. a mould moving oil cylinder; 20. a three-position four-way directional valve; 30. a two-way cartridge valve; 40. a proportional relief valve; 50. a main oil inlet; 60. a total oil return port.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
Referring to fig. 1, a mold opening and closing hydraulic system of an injection molding machine according to a preferred embodiment of the present invention is shown, including a mold-moving cylinder 10, a three-position four-way directional valve 20, a two-way cartridge valve 30, a proportional overflow valve 40, a main oil inlet 50 and a main oil return port 60; a first working oil port of the three-position four-way directional valve 20 is communicated with a rod cavity of the mold moving oil cylinder 10, a second working oil port of the three-position four-way directional valve 20 is communicated with a rodless cavity of the mold moving oil cylinder 10, and an oil inlet of the three-position four-way directional valve 20 is communicated with a main oil inlet 50; an oil inlet of the two-way cartridge valve 30 is communicated with an oil outlet of the three-position four-way directional valve 20, and an oil outlet of the two-way cartridge valve 30 is communicated with an oil return port; an oil inlet of the proportional overflow valve 40 is communicated with a control oil port of the two-way cartridge valve 30, an oil outlet of the proportional overflow valve 40 is communicated with an oil return port, and the proportional overflow valve 40 is used for controlling the pressure of the two-way cartridge valve 30.
The utility model discloses a mould hydraulic system opens and shuts of injection molding machine, through set up cartridge valve and proportional overflow valve 40 between the oil-out of tribit four-way directional valve 20 and total oil return 60, also set up cartridge valve and proportional overflow valve 40 on this hydraulic system's oil return main road and act as the brake valve group, in the mould process of opening and shutting, can realize providing oil return backpressure pressure for this hydraulic system through the pressure of proportional overflow valve 40 control cartridge valve, also realize providing the resistance of inertial motion for moving mould hydro-cylinder 10, make moving mould hydro-cylinder 10 stop the action as soon as possible, reach the purpose of quick steady brake, in this structure, backpressure pressure is controlled through proportional overflow valve 40, first proportional overflow valve 40 responds fast, second comes backpressure pressure adjustable and programmable, make backpressure pressure can be by little big for the resistance that is used in on the mould moving hydro-cylinder 10 is the gradual change effect, the action is more steady, avoid the resistance to come suddenly cause the mould moving action impact, pause and pause, thereby reducible vibration, and simultaneously, this structure accessible adjustment backpressure pressure and cartridge valve latus rectum can be applicable to different tonnages, the clamping mechanism of different flow speed requirements, application scope is wider, and the adjustment degree of difficulty is low, in addition, cartridge valve and proportion overflow valve 40's combination sets up the cost and is lower than high speed ratio example direction valve, delivery cycle is also shorter, therefore reducible cost and make things convenient for the enterprise to enlarge production, in addition, this hydraulic system overall structure is simple, do benefit to further reduce cost, and simultaneously, good operational reliability has.
Like fig. 1, make total oil inlet 50 and outside oil feeding system intercommunication, make total oil return 60 and outside oil tank intercommunication, the utility model discloses an injection molding machine mould hydraulic system that opens and shuts's theory of operation as follows:
opening the die:
the right electromagnet of the three-position four-way directional valve 20 is electrified, an oil inlet (namely, an opening a of the cartridge valve) and an oil outlet (namely, an opening B of the cartridge valve) of the cartridge valve are communicated, oil provided by the end 50 of the main oil inlet enters a first working oil port (namely, an opening A of the three-position four-way directional valve 20) of the three-position four-way directional valve 20 through an oil inlet (namely, an opening P of the three-position four-way directional valve 20) of the three-position four-way directional valve 20 and then enters a rod cavity of the mold moving oil cylinder 10 to push a piston rod of the moving oil cylinder to jack back, and then oil in a rodless cavity of the mold moving oil cylinder 10 is pushed to enter an oil outlet (namely, a opening T of the three-position four-way directional valve 20) of the three-position four-way directional valve 20 from a second working oil port (namely, an opening B of the three-position four-way directional valve 20), and then flows back to the oil tank through the cartridge valve to complete the mold opening action;
die assembly:
the electromagnet on the left side of the three-position four-way directional valve 20 is electrified, an oil inlet (i.e., the port a of the cartridge valve) and an oil outlet (i.e., the port B of the cartridge valve) of the cartridge valve are communicated, oil provided by the end 50 of the main oil inlet enters a second working oil port (i.e., the port B of the three-position four-way directional valve 20) of the three-position four-way directional valve 20 through an oil inlet (i.e., the port P of the three-position four-way directional valve 20) of the three-position four-way directional valve 20 and then enters a rodless cavity of the mold moving oil cylinder 10 to push a piston rod of the moving oil cylinder to jack, so that the oil in a rod cavity of the mold moving oil cylinder 10 is pushed to enter the oil outlet (i.e., the port T of the three-position four-way directional valve 20) of the three-position four-way directional valve 20 from a first working oil port (i.e., the port a of the three-position four-way directional valve 20), and then returns to the oil tank through the cartridge valve to complete the mold closing action.
The oil return of the die opening action and the die closing action, namely the oil return of the three-position four-way directional valve 20 passes through the cartridge valve from the oil inlet to the oil outlet of the plug-in valve and then returns to the oil tank, the opening pressure of the cartridge valve is controlled by the proportional overflow valve 40, the control oil return enters the damping hole in the valve core of the cartridge valve from the oil inlet of the cartridge valve and then enters the proportional overflow valve 40 from the control oil port of the cartridge valve, and the overflow pressure of the proportional overflow valve 40 is the opening pressure of the cartridge valve.
In this embodiment, the three-position, four-way directional valve 20 is a pilot operated valve. Of course, in other embodiments, the three-position, four-way directional valve 20 is a solenoid or pneumatic valve.
In the present embodiment, the two-way cartridge valve 30 is a solenoid valve. In other embodiments, the two-way cartridge valve 30 is a pilot operated valve or a pneumatic valve.
In the present embodiment, the proportional relief valve 40 is an electromagnetic valve. In other embodiments, proportional relief valve 40 is a pilot operated or pneumatic valve.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.
Claims (7)
1. The mold opening and closing hydraulic system of the injection molding machine is characterized by comprising a mold moving oil cylinder, a three-position four-way directional valve, a two-way cartridge valve, a proportional overflow valve, a main oil inlet and a main oil return port;
a first working oil port of the three-position four-way directional valve is communicated with a rod cavity of the mold moving oil cylinder, a second working oil port of the three-position four-way directional valve is communicated with a rodless cavity of the mold moving oil cylinder, and an oil inlet of the three-position four-way directional valve is communicated with the main oil inlet;
an oil inlet of the two-way cartridge valve is communicated with an oil outlet of the three-position four-way directional valve, and an oil outlet of the two-way cartridge valve is communicated with the oil return port;
the oil inlet of the proportional overflow valve is communicated with the control oil port of the two-way cartridge valve, the oil outlet of the proportional overflow valve is communicated with the oil return port, and the proportional overflow valve is used for controlling the pressure of the two-way cartridge valve.
2. The mold opening and closing hydraulic system of an injection molding machine as claimed in claim 1, wherein said three-position, four-way directional valve is a pilot operated valve.
3. The hydraulic open-close die system for an injection molding machine as claimed in claim 1, wherein said three-position, four-way directional valve is a solenoid valve or a pneumatic valve.
4. The hydraulic open-close die system of an injection molding machine as claimed in claim 1, wherein said two-way cartridge valve is a solenoid valve.
5. The open-close die hydraulic system for an injection molding machine as claimed in claim 1, wherein said two-way cartridge valve is a pilot operated valve or a pneumatic valve.
6. The hydraulic open-close die system of an injection molding machine as claimed in claim 1, wherein said proportional relief valve is a solenoid valve.
7. The mold opening and closing hydraulic system of an injection molding machine as claimed in claim 1, wherein the proportional relief valve is a pilot operated valve or a pneumatic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220894913.2U CN218477086U (en) | 2022-04-18 | 2022-04-18 | Mould opening and closing hydraulic system of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220894913.2U CN218477086U (en) | 2022-04-18 | 2022-04-18 | Mould opening and closing hydraulic system of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218477086U true CN218477086U (en) | 2023-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220894913.2U Active CN218477086U (en) | 2022-04-18 | 2022-04-18 | Mould opening and closing hydraulic system of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218477086U (en) |
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2022
- 2022-04-18 CN CN202220894913.2U patent/CN218477086U/en active Active
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