CN-224210480-U - Mold opening and closing oil way and injection molding machine

CN224210480UCN 224210480 UCN224210480 UCN 224210480UCN-224210480-U

Abstract

The utility model discloses an opening and closing die oil path and an injection molding machine, and relates to the technical field of injection molding equipment, wherein the opening and closing die oil path comprises an oil supply device, an oil tank, a die locking oil cylinder, a main valve, a pilot direction valve, a speed reducing one-way valve and a damping screw, the main valve comprises a main valve body, a main valve core, a first side end cover and a second side end cover, a reset spring is arranged between the main valve core and the first side end cover and between the main valve core and the second side end cover, the main valve body comprises a first oil inlet, a first oil outlet, a first working oil port and a second working oil port, the speed reducing one-way valve and the damping screw are arranged in an oil path between the first side end cover of the main valve and the oil supply device, and the speed reducing one-way valve and the damping screw control the pressure of a first side chamber of the main valve during die opening braking buffering. The technical scheme provided by the utility model can realize the braking and decelerating functions in the mold opening process, and simultaneously effectively reduces the cost.

Inventors

HU JUN
YU YUE
WANG MING
WU MAOXING
JIANG XIAOJUN

Assignees

广东伊之密精密注压科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250427

Claims (10)

1. The mold opening and closing oil way for mold opening and braking buffering is characterized by comprising an oil supply device, an oil tank, a mold locking oil cylinder, a main valve, a pilot direction valve, a speed reducing one-way valve and a damping screw, wherein, The main valve comprises a main valve body, a main valve core, a first side end cover and a second side end cover, and a reset spring is arranged between the main valve core and the first side end cover and between the main valve core and the second side end cover; The main valve body comprises a first oil inlet, a first oil outlet, a first working oil port and a second working oil port, the first oil inlet is communicated with the oil supply device, the first oil outlet is communicated with the oil tank, the first working oil port is communicated with a rodless cavity of the mold locking oil cylinder, and the second working oil port is communicated with a rod cavity of the mold locking oil cylinder; The pilot direction valve comprises a second oil inlet, a second oil outlet, a third working oil port and a fourth working oil port, the second oil inlet is communicated with the oil supply device, the second oil outlet is communicated with the oil tank, and the third working oil port and the fourth working oil port are respectively communicated with the first side end cover and the second side end cover of the main valve; The speed reducing one-way valve and the damping screw are arranged on an oil way between the first side end cover of the main valve and the oil supply device, and the speed reducing one-way valve and the damping screw control the pressure of the first side cavity of the main valve when the die opening brake is buffered.
2. The mold opening/closing oil passage according to claim 1, wherein a flow direction of said speed reducing check valve is set to a direction from said first side end cover of said main valve to said oil supply device.
3. The mold opening and closing oil passage as set forth in claim 2, wherein said deceleration check valve includes a deceleration spring and a deceleration ball connected, said deceleration spring being located on a side of said deceleration ball adjacent to said damper screw.
4. The mold opening and closing oil passage according to claim 1, wherein the damper screw is installed in the oil passage between the first side end cover and the oil supply device, the damper screw is provided with a flow hole for the oil to flow through, and the flow hole has a smaller diameter than the passage hole of the oil passage.
5. The open-close hydraulic circuit according to claim 1 to 4, wherein the main valve is a hydraulic reversing valve.
6. The mold opening/closing oil passage according to any one of claims 1 to 4, wherein the pilot direction valve is provided as an electromagnetic directional valve.
7. The mold opening and closing oil passage according to claim 6, wherein the pilot direction valve includes a pilot spool and electromagnets located on both sides of the pilot spool, the electromagnets being configured to push the pilot spool to displace.
8. The mold opening/closing oil passage according to claim 1, further comprising a pilot check valve provided in an oil passage between the pilot direction valve and the oil supply device, wherein a flow direction of the pilot check valve is set in a direction from the oil supply device to the pilot direction valve.
9. The mold opening/closing oil passage according to claim 1, wherein the speed reducing check valve and the damper screw are further provided in an oil passage between the second side end cap of the main valve and the oil supply device, and the speed reducing check valve and the damper screw control the pressure of the second side chamber of the main valve when the mold is closed and braked.
10. An injection molding machine, characterized in that the injection molding machine comprises the mold opening/closing oil passage according to any one of claims 1 to 9.

Description

Mold opening and closing oil way and injection molding machine Technical Field The utility model relates to the technical field of injection molding equipment, in particular to a mold opening and closing oil way and an injection molding machine. Background At present, the opening and closing operation of the injection molding machine is generally controlled by adopting a hydraulic oil way, and the opening and closing positioning precision is required to be high, the cost is low, and the like. Therefore, how to design a cheap and useful mold opening and closing control scheme in consideration of the performance, cost and other requirements of mold opening and closing control is one of the key points and difficulties of hydraulic oil path design. In the prior art, one control scheme adopts a common hydraulic direction valve for mold opening and closing control, but the mold opening process can not realize a brake deceleration function, so that the mold opening deceleration time is long, the positioning precision is poor and the like, and the other control scheme adopts a proportional valve for mold opening and closing control, and the brake deceleration function in the mold opening process can be realized, but the cost of the proportional valve is higher. It should be noted that the foregoing is only used to assist in understanding the technical solution of the present utility model, and does not represent an admission that the foregoing is prior art. Disclosure of utility model The utility model mainly aims to provide an opening and closing oil way and an injection molding machine, which aim to realize a braking and decelerating function in the mold opening process and effectively reduce the cost. In order to achieve the above object, the present utility model provides a mold opening and closing oil path comprising an oil supply device, an oil tank, a mold locking oil cylinder, a main valve, a pilot directional valve, a speed reducing check valve and a damping screw, wherein, The main valve comprises a main valve body, a main valve core, a first side end cover and a second side end cover, and a reset spring is arranged between the main valve core and the first side end cover and between the main valve core and the second side end cover; The main valve body comprises a first oil inlet, a first oil outlet, a first working oil port and a second working oil port, the first oil inlet is communicated with the oil supply device, the first oil outlet is communicated with the oil tank, the first working oil port is communicated with a rodless cavity of the mold locking oil cylinder, and the second working oil port is communicated with a rod cavity of the mold locking oil cylinder; The pilot direction valve comprises a second oil inlet, a second oil outlet, a third working oil port and a fourth working oil port, the second oil inlet is communicated with the oil supply device, the second oil outlet is communicated with the oil tank, and the third working oil port and the fourth working oil port are respectively communicated with the first side end cover and the second side end cover of the main valve; The speed reducing one-way valve and the damping screw are arranged on an oil way between the first side end cover of the main valve and the oil supply device, and the speed reducing one-way valve and the damping screw control the pressure of the first side cavity of the main valve when the die opening brake is buffered. Optionally, the flow direction of the speed reducing check valve is set to be the direction from the first side end cover of the main valve to the oil supply device. Optionally, the speed reducing check valve comprises a speed reducing spring and a speed reducing ball body which are connected, and the speed reducing spring is positioned on one side of the speed reducing ball body, which is close to the damping screw. Optionally, the damping screw is installed in the first side end cover with inside the oil circuit between the oil feeding unit, the damping screw is equipped with the circulation hole that is used for the oil body to circulate, the aperture of circulation hole is less than the passageway aperture of oil circuit. Optionally, the main valve is configured as a hydraulically operated directional valve. Optionally, the pilot direction valve is provided as an electromagnetic directional valve. Optionally, the pilot direction valve comprises a pilot valve core and electromagnets positioned at the left side and the right side of the pilot valve core, and the electromagnets are used for pushing the pilot valve core to displace. Optionally, the die opening and closing oil path further comprises a pilot one-way valve, wherein the pilot one-way valve is arranged in an oil path between the pilot direction valve and the oil supply device, and the circulation direction of the pilot one-way valve is the direction from the oil supply device to the pilot direction valve. Optionally, the speed reducing check v