CN210705967U - Oil circuit control system of injection blow molding machine mould clamping mechanism - Google Patents
Oil circuit control system of injection blow molding machine mould clamping mechanism Download PDFInfo
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- CN210705967U CN210705967U CN201721877656.7U CN201721877656U CN210705967U CN 210705967 U CN210705967 U CN 210705967U CN 201721877656 U CN201721877656 U CN 201721877656U CN 210705967 U CN210705967 U CN 210705967U
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Abstract
The utility model discloses an oil circuit control system of a mold clamping mechanism of an injection blowing machine, which comprises an oil tank, a liquid pump, a servo motor for controlling the liquid pump, a mold locking oil cylinder, a plunger oil cylinder and a liquid filling valve, wherein a rod cavity of the mold locking oil cylinder is an A cavity, a rodless cavity of the mold locking oil cylinder is a B cavity, the plunger oil cylinder takes a piston rod of the mold locking oil cylinder as a cylinder body, a piston rod of the plunger oil cylinder is arranged towards the B cavity of the mold locking oil cylinder, a plunger cavity for the piston rod of the plunger oil cylinder to stretch is arranged inside the piston rod of the mold locking oil cylinder, a first oil circuit is arranged between the oil tank and the plunger cavity, a second oil circuit is arranged between the oil tank and the A cavity, the first oil circuit and the second oil circuit form, the oil circuit control system of the injection blowing machine die assembly mechanism directly absorbs oil from the oil tank by utilizing the pressure difference generated when the oil cylinder moves, and the speed is far higher than that of the direct oil filling of an oil pump motor.
Description
Technical Field
The utility model relates to an annotate and blow the machine field, more specifically say, it relates to annotate oil circuit control system who blows quick-witted locking mechanism.
Background
In the field of injection blow molding machines, mold closing power of a vertical injection blow molding machine is basically provided by a mold locking oil cylinder with large volume, and mold closing force is equal to thrust generated by an oil cylinder piston rod and is equal to system pressure multiplied by sectional area of an oil cylinder body. The existing mode locking oil cylinder basically adopts a common piston oil cylinder, namely, rodless cavity oil is filled to push a piston to drive the piston to act.
The existing mold locking oil cylinder is arranged, if a large mold locking force needs to be obtained, under the condition that the system pressure is difficult to lift, the sectional area of the oil cylinder can be increased, and therefore the volume of the oil cylinder is increased. Because the power of a servo motor of the liquid pump is limited, the larger the volume of the oil cylinder is, the slower the oil filling speed is, the lower the mold opening and mold closing speed of the machine is caused, and if the mold opening and mold closing speed of the injection blowing machine is too low, the production efficiency is reduced, and the production performance of the machine is directly influenced; meanwhile, due to the double-station characteristic of the injection blowing machine, if the time for station conversion engineering is long, the bottle blank is cooled, the production process is influenced, and the product is flawed or even cannot obtain a complete product.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists above-mentioned, the utility model aims at: an oil circuit control system of a die assembly mechanism of an injection molding machine is provided, which utilizes the pressure difference generated by the movement of an oil cylinder to quickly fill and assemble the die.
In order to achieve the above purpose, the utility model provides a new technical scheme: the oil circuit control system of the mold clamping mechanism of the injection blowing machine comprises an oil tank, a liquid pumping pump, a servo motor for controlling the liquid pumping pump, a mold locking oil cylinder, a plunger oil cylinder and a liquid filling valve, wherein a rod cavity of the mold locking oil cylinder is an A cavity, a rodless cavity of the mold locking oil cylinder is a B cavity, the plunger cylinder takes a piston rod of the mold locking cylinder as a cylinder body, the piston rod of the plunger cylinder is arranged towards the cavity B of the mold locking cylinder, a plunger cavity for the piston rod of the plunger cylinder to stretch is arranged inside the piston rod of the mold locking cylinder, a first oil way is arranged between the oil tank and the plunger cavity, a second oil way is arranged between the oil tank and the cavity A, the first oil way and the second oil way form a die assembly oil way, a mold locking oil way and an oil return oil way are arranged between the oil tank and the cavity B, and a liquid pump, a servo motor, a left position 1YA of a three-position four-way electromagnetic reversing valve and a hydraulic control one-way valve are sequentially connected between the first oil way and the plunger cavity from the oil tank; the second oil path is connected with the right position 2YA of the three-position four-way electromagnetic reversing valve, the balance valve and the liquid filling valve in sequence from the oil tank to the cavity A, when the left position 1YA of the three-position four-way electromagnetic reversing valve is electrified, the first oil path is connected, pressure oil enters the plunger cavity, the piston rod of the mode locking oil cylinder rapidly descends, the cavity B of the mode locking oil cylinder forms negative pressure, the liquid filling valve is opened, hydraulic oil in the oil tank rapidly enters the cavity B of the mode locking oil cylinder along with the second oil path, and the mode locking oil cylinder is rapidly closed.
According to the technical scheme: the mould clamping mechanism of the existing injection blowing machine adopts a single oil cylinder, and because the mould locking oil cylinder of the injection blowing machine only needs to provide larger power during mould locking, the utility model discloses a form of master-slave oil cylinder is formed by adding a plunger oil cylinder into the piston rod of the mould locking oil cylinder, in the mould locking process, the force borne by the mould locking oil cylinder is smaller, the piston rod of the mould locking oil cylinder and the injection blowing machine can be directly driven by the plunger oil cylinder to move, so that a faster mould locking speed can be realized, because the moving speed of the plunger oil cylinder is far greater than that of the mould locking oil cylinder, a liquid filling valve is added at the oil inlet of the cavity B of the mould locking oil cylinder, the piston rod of the mould locking oil cylinder descends rapidly, the cavity B of the mould locking oil cylinder forms negative pressure, the liquid filling valve is opened, hydraulic oil in the oil tank enters the cavity B of the mould locking oil cylinder rapidly along with a second oil line, the oil is directly absorbed from the oil tank, and the speed is far higher than that of the direct oil filling of an oil pump motor.
The utility model discloses a further set up to: the mode locking oil circuit has connected gradually oil tank, drawing liquid pump, servo motor, tribit four-way electromagnetic directional valve's left position 1YA and two-way electromagnetic directional valve II from the oil tank to between the B chamber, and when two-way electromagnetic directional valve II got electric, the mode locking oil circuit was put through, and hydraulic oil flowed in the B chamber and carried out the pressure boost, provides required clamping force for locking die mechanism.
According to the technical scheme: this setting can cooperate the compound die oil circuit to realize the mode locking fast.
The utility model discloses a further set up to: the oil return oil way is sequentially connected with an oil tank, a three-position four-way electromagnetic directional valve right position 2YA, a hydraulic control one-way valve and a two-position two-way electromagnetic directional valve II from the oil tank to a cavity B, when the right position 2YA of the three-position four-way electromagnetic directional valve is electrified, pressure oil enters the cavity A of the mold locking oil cylinder through a balance valve, a liquid filling valve is opened under pressure, hydraulic oil in the cavity B is quickly discharged back to the oil tank, and the hydraulic oil in the plunger cavity is discharged back to the oil tank along with the reduction of the hydraulic oil in the cavity B of the mold locking.
According to the technical scheme: the liquid filling valve is arranged to realize quick liquid filling, and meanwhile, hydraulic oil in the cavity B can be returned to the oil tank after being opened under the action of oil pressure of the cavity B during mold opening, and the hydraulic oil in the plunger cavity is returned to the oil tank due to the fact that a piston rod of the mold locking oil cylinder rises along with the removal of the hydraulic oil in the cavity B.
The utility model discloses a further set up to: be provided with accuse pressure system on the mode locking hydro-cylinder, this accuse pressure system includes the mode locking manometer, is provided with mode locking pressure sensor between mode locking hydro-cylinder and mode locking manometer, still is connected with two-way solenoid directional valve I that are used for the pressure release on the mode locking hydro-cylinder.
According to the technical scheme: the mould locking manometer is implemented and is monitored the pressure of mode locking hydro-cylinder, and two settings of leading to solenoid directional valve I are used for the pressure release, and before the die sinking, mould locking hydro-cylinder internal pressure is big, and the mould sinking impact can effectively be reduced at the die sinking to earlier the pressure release.
The utility model discloses a further set up to: and a system safety overflow valve is arranged on an oil path between the three-position four-way electromagnetic directional valve and the oil tank.
According to the technical scheme: the system overflow valve is used as a hydraulic pressure control valve, and plays the roles of constant pressure overflow, pressure stabilization, system unloading and safety protection in a hydraulic system.
The utility model discloses a further set up to: an air filter is arranged in the oil tank.
According to the technical scheme: effectively filter the air and remove the particulate impurities in the air.
The utility model discloses a further set up to: and a liquid level meter is arranged in the oil tank.
According to the technical scheme: the device is used for detecting the oil storage amount in the oil tank in real time.
The utility model discloses compare in prior art's advantage do: the plunger oil cylinder is added into a piston rod of the mold locking oil cylinder to form a master-slave oil cylinder, in the mold closing process, the force borne by the mold locking oil cylinder is small, the piston rod of the mold locking oil cylinder and the injection blowing machine can be directly driven by the plunger oil cylinder to move, so that the rapid mold closing speed can be realized, the moving speed of the plunger oil cylinder is far higher than that of the mold locking oil cylinder, a liquid filling valve is added at an oil inlet of a cavity B of the mold locking oil cylinder, the piston rod of the mold locking oil cylinder rapidly descends, the cavity B of the mold locking oil cylinder forms negative pressure, the liquid filling valve is opened, hydraulic oil in the oil tank rapidly enters the cavity B of the mold locking oil cylinder along with a second oil path, so that the mold locking oil cylinder rapidly closes the mold, the liquid filling valve is arranged to realize rapid liquid filling, the hydraulic oil opened in the cavity B can flow back to the oil tank under the action of the oil pressure, the oil way control system of the die assembly mechanism of the injection blowing machine directly absorbs oil from the oil tank by utilizing the pressure difference generated when the oil cylinder moves, and the speed is far higher than that of the direct oil filling of an oil pump motor.
Drawings
FIG. 1 is a schematic view of an oil path control system of a clamping mechanism of an injection blow molding machine according to the present embodiment;
fig. 2 is a sectional view of the mold-locking cylinder and the plunger cylinder in the present embodiment.
In the figure: 1. a liquid charging valve; 2. a mold locking pressure sensor; 3. a mode locking pressure gauge; 4. a two-position two-way electromagnetic directional valve I; 5. a balancing valve; 6. a mold locking oil cylinder; 601. a cavity A; 602. a cavity B; 7. a plunger cylinder; 701. a plunger cavity; 8. a two-position two-way electromagnetic directional valve II; 9. a hydraulic control check valve; 10. a three-position four-way electromagnetic directional valve; 11. a system safety overflow valve; 12. an oil absorption filter; 13. an oil return cooler; 14. an air cleaner; 15. a liquid level meter; 16. a servo motor; 17. a liquid pump; 18. and an oil tank.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.
Examples
An oil path control system of a mold clamping mechanism of an injection blowing machine comprises an oil tank 18, a liquid pumping pump 17, a servo motor 16 for controlling the liquid pumping pump 17, a mold locking oil cylinder 6, a plunger oil cylinder 7 and a liquid filling valve 1, wherein a rod cavity of the mold locking oil cylinder 6 is an A cavity 601, a rodless cavity of the mold locking oil cylinder 6 is a B cavity 602, a piston rod of the plunger oil cylinder 7 is used as a cylinder body, a piston rod of the plunger oil cylinder 7 is arranged towards the B cavity 602 of the mold locking oil cylinder 6, a plunger cavity 701 for the piston rod of the plunger oil cylinder 7 to stretch is arranged inside the piston rod of the mold locking oil cylinder 6, a first oil path is arranged between the oil tank 18 and the plunger cavity 701, a second oil path is arranged between the oil tank 18 and the A cavity 601, the first oil path and the second oil path form a mold clamping oil path, a mold clamping oil path and an oil path are arranged between the oil tank 18 and the B, The left position 1YA of the three-position four-way electromagnetic reversing valve 10 and the hydraulic control one-way valve 9; the second oil path is sequentially connected with the right position 2YA of the three-position four-way electromagnetic directional valve 10, the balance valve 5 and the liquid charging valve 1 from the oil tank 18 to the cavity A601; an oil tank 18, a liquid pump 17, a servo motor 16, a left position 1YA of the three-position four-way electromagnetic directional valve 10 and a two-position two-way electromagnetic directional valve II 8 are sequentially connected between the mode locking oil way from the oil tank 18 to the cavity B602; an oil tank 18, a right position 2YA of the three-position four-way electromagnetic directional valve 10, a hydraulic control one-way valve 9 and a two-position two-way electromagnetic directional valve II 8 are sequentially connected between the oil tank 18 and the cavity B602 of the oil return oil path.
Be provided with accuse pressure system on mode locking hydro-cylinder 6, this accuse pressure system includes mode locking manometer 3, is provided with mode locking pressure sensor 2 between mode locking hydro-cylinder 6 and mode locking manometer 3, still is connected with two solenoid directional valves I4 that are used for the pressure release on mode locking hydro-cylinder 6.
An air filter 14 and a liquid level meter 15 are arranged in an oil tank 18, an oil return cooler 13 is arranged between the oil tank 18 of the mode locking oil way and the right position 2YA of the three-position four-way electromagnetic directional valve 10, and the oil return cooler 13 is used for maintaining the heat balance of the hydraulic system.
And a system safety overflow valve 11 is arranged on an oil path between the three-position four-way electromagnetic directional valve 10 and the oil tank 18. The system safety overflow valve is used as a hydraulic pressure control valve and plays the roles of constant pressure overflow, pressure stabilization, system unloading and safety protection in a hydraulic system.
When the mold is closed, the servo motor 16 outputs pressure and flow, the left position 1YA of the three-position four-way electromagnetic directional valve 10 is electrified, the first oil path is communicated, the liquid pump 17 pumps pressure oil of the oil tank 18 to enter the plunger cavity 701 of the plunger oil cylinder 7 through the hydraulic control one-way valve 9, the pressure of the plunger cavity 701 is increased, the piston rod of the mold locking oil cylinder 6 rapidly descends, at the moment, the cavity B602 of the mold locking oil cylinder 6 forms negative pressure, the liquid filling valve 1 is opened, hydraulic oil in the oil tank 18 sequentially passes through the right position 2YA of the three-position four-way electromagnetic directional valve 10, the balance valve 5 and the liquid filling valve 1 to rapidly enter the cavity B602 of the mold locking oil cylinder 6 along with the second oil path, so that the mold locking oil cylinder 6 is rapidly closed, when the mold is closed to the right position, the two-position two-way electromagnetic directional valve II 8 is electrified, the mold locking oil path is communicated, the hydraulic oil flows into the cavity B602 from the, and providing required clamping force for the clamping mechanism.
Before the die opening, the two-position two-way electromagnetic directional valve I4 is electrified to release pressure, so that the die opening impact is reduced.
When the mold is opened, the right position 2YA of the three-position four-way electromagnetic directional valve 10 is electrified, pressure oil enters the cavity a 601 of the mold locking oil cylinder 6 through the balance valve 5, at the moment, the pressure oil in the cavity B602 of the mold locking oil cylinder 6 acts on the pilot oil of the liquid filling valve 1 to open the liquid filling valve 1, hydraulic oil in the cavity B602 of the mold locking oil cylinder 6 is quickly discharged back to the oil tank 18, and along with the reduction of the hydraulic oil in the cavity B602 of the mold locking oil cylinder 6, the piston rod of the mold locking oil cylinder 6 rises to enable the hydraulic oil in the plunger cavity 701 of the plunger oil cylinder 7 to return to the oil tank 18 through the right position 2YA of the three-position.
Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.
Claims (7)
1. The oil circuit control system of the mold clamping mechanism of the injection blowing machine comprises an oil tank (18), a liquid pumping pump (17) and a servo motor (16) for controlling the liquid pumping pump (17), and is characterized by further comprising a mold locking oil cylinder (6), a plunger oil cylinder (7) and a liquid filling valve (1), wherein a rod cavity of the mold locking oil cylinder (6) is an A cavity (601), a rodless cavity of the mold locking oil cylinder (6) is a B cavity (602), a piston rod of the mold locking oil cylinder (6) is taken as a cylinder body by the plunger oil cylinder (7), the piston rod of the plunger oil cylinder (7) is arranged towards the B cavity (602) of the mold locking oil cylinder (6), and a plunger cavity (701) for the piston rod of the plunger oil cylinder (7) to stretch and retract is arranged inside the piston rod; a first oil way is arranged between the oil tank (18) and the plunger cavity (701), a second oil way is arranged between the oil tank (18) and the cavity A (601), the first oil way and the second oil way form a die assembly oil way, and a die locking oil way and an oil return oil way are arranged between the oil tank (18) and the cavity B (602); a liquid pump (17), a servo motor (16), a left position 1YA of the three-position four-way electromagnetic directional valve (10) and a hydraulic control one-way valve (9) are sequentially connected between the first oil path from the oil tank (18) to the plunger cavity (701); the second oil path is from right position 2YA, balance valve (5) and prefill valve (1) that connect gradually three-position four-way electromagnetic directional valve (10) between oil tank (18) to A chamber (601), when the left position 1YA of three-position four-way electromagnetic directional valve (10) gets electric, first oil path switch-on, pressure oil gets into plunger chamber (701), the piston rod of mode locking hydro-cylinder (6) descends fast, B chamber (602) of mode locking hydro-cylinder (6) form the negative pressure, prefill valve (1) are opened, hydraulic oil in oil tank (18) enters into B chamber (602) of mode locking hydro-cylinder (6) fast along with the second oil path, make mode locking hydro-cylinder (6) fast compound die.
2. The oil circuit control system of the mold clamping mechanism of the injection blow molding machine according to claim 1, wherein the mold locking oil circuit is sequentially connected with an oil tank (18), a liquid pump (17), a servo motor (16), a left position 1YA of the three-position four-way electromagnetic directional valve (10) and a two-position two-way electromagnetic directional valve ii (8) from the oil tank (18) to the cavity B (602), when the two-position two-way electromagnetic directional valve ii (8) is powered on, the mold locking oil circuit is connected, hydraulic oil flows into the cavity B (602) to be pressurized, and a required mold locking force is provided for the mold clamping mechanism.
3. The oil circuit control system of the mold clamping mechanism of the injection blow molding machine according to claim 1, characterized in that the oil return circuit is sequentially connected with an oil tank (18), a right 2YA of the three-position four-way electromagnetic directional valve (10), a hydraulic control one-way valve (9) and a two-position two-way electromagnetic directional valve II (8) from the oil tank (18) to the cavity B (602), when the right 2YA of the three-position four-way electromagnetic directional valve (10) is powered, pressure oil enters the cavity A (601) of the mold locking oil cylinder (6) through the balance valve (5), the liquid filling valve (1) is opened under pressure, hydraulic oil in the cavity B (602) is quickly discharged back to the oil tank (18), and along with the reduction of the hydraulic oil in the cavity B (602) of the mold locking oil cylinder (6), the hydraulic oil in the plunger cavity (701) is discharged back to the oil.
4. The oil circuit control system of the mold clamping mechanism of the injection blow molding machine according to any one of claims 1 to 3, characterized in that a pressure control system is arranged on the mold locking oil cylinder (6), the pressure control system comprises a mold locking pressure gauge (3), a mold locking pressure sensor (2) is arranged between the mold locking oil cylinder (6) and the mold locking pressure gauge (3), and a two-position two-way electromagnetic directional valve I (4) for pressure relief is further connected to the mold locking oil cylinder (6).
5. The oil circuit control system of the mold clamping mechanism of the injection blow molding machine according to claim 4, characterized in that a system safety overflow valve (11) is arranged on an oil circuit between the three-position four-way electromagnetic directional valve (10) and the oil tank (18).
6. The oil circuit control system of the mold clamping mechanism of the injection blow molding machine according to claim 5, characterized in that an air filter (14) is arranged in the oil tank (18).
7. The oil circuit control system of the mold clamping mechanism of the injection blow molding machine according to claim 6, characterized in that a liquid level meter (15) is arranged in the oil tank (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721877656.7U CN210705967U (en) | 2017-12-28 | 2017-12-28 | Oil circuit control system of injection blow molding machine mould clamping mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721877656.7U CN210705967U (en) | 2017-12-28 | 2017-12-28 | Oil circuit control system of injection blow molding machine mould clamping mechanism |
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| CN210705967U true CN210705967U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721877656.7U Active CN210705967U (en) | 2017-12-28 | 2017-12-28 | Oil circuit control system of injection blow molding machine mould clamping mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474630A (en) * | 2022-02-11 | 2022-05-13 | 伯乐智能装备股份有限公司宁波分公司 | Injection molding equipment |
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2017
- 2017-12-28 CN CN201721877656.7U patent/CN210705967U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474630A (en) * | 2022-02-11 | 2022-05-13 | 伯乐智能装备股份有限公司宁波分公司 | Injection molding equipment |
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