TWM638226U - Non-return direct-pull type die clamp device - Google Patents

Abstract

This creation is to design a non-reverse straight-pull mold clamp, which includes a cylinder body with a piston hole and a valve hole; a piston is arranged in the piston hole, and the piston hole is divided into a working chamber and a reset Cavity; an axis, connected with the piston, for performing the clamping function; a hydraulic control check valve is arranged in the valve hole, and is arranged on the cylinder body, and the hydraulic control check valve has an oil outlet, One oil inlet and one control port. When the hydraulic oil enters the working chamber through the oil outlet, the piston can be pushed to generate clamping force, and the channel from the oil outlet to the oil inlet is closed at this time; when the hydraulic oil enters the reset chamber through the control port, the oil inlet and outlet Open at the same time, can drive the piston and the shaft center to quickly reset. And when the oil pipe of the external oil circuit of the clamp is damaged, the joint leaks, etc., because the passage of the oil inlet and the oil outlet is closed, the hydraulic oil in the solid working chamber will not flow out, and the clamping force of the clamp can be maintained. It will not be affected, which improves the safety during the use of the clamp. This creation uses oil pressure check and reset, which makes the assembly of the mold clamp easier and the work efficiency is improved.

Description

Non-reverse Straight Pull Clamp

This creation is a non-reverse type straight-pull mold clamp, especially a clamp that uses hydraulic pressure as the source of clamping force.

The quick mold change system is mainly used in the quick change of molds used in punch presses, injection molding machines, die-casting machines and various automation machines. The quick mold change system can greatly save mold change time, reduce equipment idle time and increase production capacity through automatic mold clamping. The simple operation method can reduce the configuration of production line personnel, thereby reducing labor intensity and labor costs. Among them, the straight-pull mold clamp is an indispensable part of the quick mold change system. It mainly uses high-pressure oil as the power source and is clamped at the U-shaped groove along the mold edge. This mold clamp has the advantage of saving space.

However, the common straight-pull mold clamps currently on the market are spring-return single-acting hydraulic cylinder structures. The hydraulic oil pushes the piston to provide the clamping force for clamping the mold. When it is necessary to change the mold, it uses the return spring. Assists in piston reset. Above-mentioned structure has following shortcoming in fact:

(1) When in use, the oil pressure may drop due to pipeline leakage caused by loose joints, oil pipe rupture, etc., resulting in insufficient clamping force of the mold clamp, which will cause the machine to fail to work normally, and even cause the mold to overturn or fall off and other production safety accidents.

(2) The reset spring is used to reset the piston, and the reset speed is relatively slow, and after a period of use, the spring may become fatigued due to the elasticity of the spring, resulting in a decrease in the reset speed of the piston, or even a problem that the piston cannot be completely reset.

This creation is to improve the shortcomings of the above-mentioned conventional knowledge. The main technology and purpose are: to design a clamp. When the clamp is clamped, the pressure drop of the external pipeline will not cause the clamping force of the clamp. Influence. The main system includes a non-reverse straight-pull mold clamp, including a cylinder body, a piston set in the cylinder body, and an axis connected to the piston for performing the clamping function. The cylinder body is equipped with a hydraulic control check valve. The oil outlet of the control check valve communicates with the working chamber on one side of the piston.

The hydraulic control check valve is a valve that can reverse the flow of the check valve by controlling the fluid pressure. The difference between the hydraulic control check valve and the ordinary check valve is that there is one more control port. When the control port is not connected to the hydraulic oil, the hydraulic control check valve works like a normal check valve, and the hydraulic oil only comes from the oil inlet. The port flows to the oil outlet, and cannot flow in the opposite direction. When the hydraulic oil is injected into the control port, the valve core is displaced under the action of the hydraulic oil, the one-way valve is opened, and the oil inlet and outlet are connected. If the pressure of the oil outlet is greater than that of the oil inlet, the oil can flow in the opposite direction.

In this creation, the hydraulic control check valve is directly installed on the cylinder of the clamp, which becomes an important part of the clamp. When the hydraulic oil enters the working chamber through the oil outlet, it can push the piston to generate clamping force. The passage from the oil outlet to the oil inlet is closed; when the hydraulic oil enters the reset chamber through the control port, the oil inlet and outlet are opened at the same time, which can drive the piston and the shaft to reset quickly. And when the oil pipe of the external oil circuit of the clamp is damaged, the joint leaks, etc., because the passage of the oil inlet and the oil outlet is closed, the hydraulic oil in the solid working chamber will not flow out, and the clamping force of the clamp can be maintained. It will not be affected, which improves the safety during the use of the clamp. This creation uses oil pressure check and reset, which makes the assembly of the mold clamp easier and the work efficiency is improved.

10: Cylinder

11: Working cavity

12: Reset cavity

13: The first runner

14: Second runner

15: cylinder head

16: steel ball

20: Piston

30: axis

40: hydraulic control check valve

41:Oil outlet

42: Oil inlet

43: Control port

44: Spool

51: First connector

52: Second connector

The first picture is a schematic diagram of the three-dimensional structure of this creation

Figure 2 The side view of this creation

The third picture is the schematic diagram of the hydraulic system in this creation

Please refer to Figures 1 to 3, a non-return type straight-pull mold clamp includes a cylinder 10 with a piston hole and a valve hole; a piston 20 is arranged in the piston hole, and the piston 20 is placed in the piston hole The center can move in the axial direction, and the piston hole is divided into upper and lower chambers by the O-ring combination, which is a working chamber 11 and a reset chamber 12; the cylinder 10 is provided with a through hole concentric with the piston hole , an axis 30 passes through the through hole and is threadedly connected with the piston 20 for performing the clamping function; a cylinder head 15 can be screwed on the cylinder body 10; a hydraulic control check valve 40 is located on the In the valve hole, it is connected with the cylinder body 10 through threads, and the combination of the O-ring sealing ring that comes with the hydraulic control check valve 40 is used to prevent internal and external leakage. The hydraulic control check valve 40 has an oil outlet 41 and an oil inlet. 42 . A control port 43 and a valve core 44 are arranged on the cylinder body 10 , and the oil outlet 41 communicates with the working chamber 11 . When the hydraulic oil enters through the oil inlet 42 of the hydraulic control check valve 40, it flows from the oil outlet 41 to the working chamber 11 on one side of the piston, so that the piston 20 and the shaft center 30 can be driven to linearly displace in one direction. The core 30 will clamp the mould.

Wherein, the cylinder body 10, the cylinder head 15, and the piston 20 are all provided with grooves for placing O-shaped sealing ring combinations, which are mainly used to prevent the hydraulic oil in the clamp from leaking out.

And the control port 43 of the hydraulic control check valve 40 communicates with the reset chamber 12 on one side of the piston 20 . When the hydraulic oil is injected into the control port 43, the spool 44 is displaced downward under the action of the hydraulic oil. At this time, the oil outlet 41 is connected to the oil inlet 42. At the same time, the hydraulic oil is injected into the reset chamber 12 to make the piston 20 and the shaft The core 30 resets quickly, and the working oil in the working chamber 11 flows out of the mold clamp through the connected oil inlet 42 and the oil outlet 41.

In addition, a first joint 51 and a second joint 52 can be set on the cylinder 10 of the present invention; the first and second joints 51, 52 are connected to the cylinder 10 through threads, wherein the first joint 51 is connected to the hydraulic control The control port 43 of the one-way valve 40 communicates, and the second joint 52 communicates with the oil inlet 42 of the hydraulically controlled one-way valve 40 . The first joint 51 and the second joint 52 can switch between the working oil and the oil return, that is, the connection mode between the first joint 51 and the second joint 52 and the working oil port and the oil return port can be: the first joint 51 and the working oil The oil port is connected, and the second joint 52 is connected with the oil return port; the first joint 51 is connected with the oil return port, and the second joint 52 is connected with the working oil port. The switch of this connection mode can adopt a solenoid valve, and the solenoid valve is arranged on the oil circuit between the first joint 51, the second joint 52, the working oil port and the oil return port.

Please refer to the second and third figures again. When the second joint 52 is connected to the working oil port and the first joint 51 is connected to the return oil port, the hydraulic oil flows into the oil inlet 42 of the hydraulic control check valve 40 through the second joint 52 , when the pressure of the oil inlet 42 exceeds the opening pressure of the hydraulic control check valve 40, the oil inlet 42 communicates with the oil outlet 41, and the hydraulic oil enters the working chamber 11 of the cylinder body through the oil outlet 41, pushing the piston 20 to drive the shaft The core 30 moves toward the direction close to the cylinder head 15, and the mold clamp realizes the mold clamping action. At this time, in the reverse direction, the channel from the oil outlet 41 to the oil inlet 42 of the hydraulic control check valve 40 is closed, that is, even if the hydraulic oil leaks outside the mold clamp, the hydraulic pressure in the cylinder working chamber 11 will be closed. Oil does not flow out, so the clamping force does not decrease and the mold does not loosen.

When the first joint 51 is connected to the working oil port and the second joint 52 is connected to the return oil port, the hydraulic oil enters the control port 43 of the hydraulic control check valve 40 and the reset chamber 12 of the cylinder 10 through the first joint 51. When the control port When the oil pressure at 43 reaches 1/3 of the oil pressure at the oil outlet 41, the spool of the hydraulic control check valve 40 opens, the oil inlet 42 communicates with the oil outlet 41, and the hydraulic oil in the working chamber 11 of the cylinder 10 passes through the inlet Port 42 flows back to tank. Simultaneously, the oil pressure of the cylinder reset chamber 12 pushes the piston 20 to drive the axis 30 to move away from the cylinder head 15, so that the mold clamp can quickly release the mold.

The control port 43 of the hydraulic control check valve 40 communicates with the reset chamber 12 through a first flow passage 13 ; the oil outlet 41 communicates with the working chamber 11 through a second flow passage 14 . Ends of the first flow channel 13 and the second flow channel 14 can be blocked by steel balls 16 .

According to above-mentioned structure, can obtain following effect, advantage:

(1) This creation integrates the clamp and the hydraulic control check valve into an integrated structure, so that even if the oil pipe of the external oil circuit of the clamp is damaged or the joint leaks, the clamping of the clamp will not be affected power effect. It greatly improves the safety during the use of the mold clamp, ensures the personal safety of the on-site staff, and avoids safety accidents and property losses caused by problems such as mold falling off.

(2) Improve the single-acting spring-return type clamp in the prior art to become a double-acting clamp with oil pressure check and oil pressure reset. The change of the structure of the clamp makes its assembly easier, The assembly efficiency and work efficiency are improved.

To sum up, this creation does have a breakthrough structure, and has improved design and creation content, and at the same time can achieve industrial utilization and advancement, and this creation has not been seen in any information that can be known to the public. If it is novel, it should comply with the provisions of the Patent Law and regulations. I would like to file a patent application for a new model according to the law, and I sincerely ask the noble review committee of the Jun Bureau to grant a legal patent right. I am grateful for it.

Only the above-mentioned ones are only one of the preferred embodiments of this creation, and the scope of implementation of this creation cannot be limited accordingly; that is, all equal changes and modifications created according to the scope of the patent application for this creation should still be covered by this creation patent scope.

10: Cylinder

11: Working cavity

12: Reset cavity

13: The first runner

14: Second runner

15: cylinder head

16: steel ball

20: Piston

30: axis

40: hydraulic control check valve

41:Oil outlet

42: Oil inlet

43: Control port

44: Spool

Claims (5)

A non-reverse straight-pull mold clamp includes: 1. Cylinder body with piston hole and valve hole; A piston is arranged in the piston hole, and the piston hole is divided into a working chamber and a reset chamber; an axis, connected to the piston, for performing the clamping function; A hydraulically controlled one-way valve is arranged in the valve hole, has an oil outlet, an oil inlet, and a control port, and is arranged on the cylinder body. The oil outlet communicates with the working chamber. The non-reverse straight-pull mold clamp according to Claim 1, wherein the control port communicates with the reset cavity. The non-reverse straight-pull mold clamp as described in claim 2, which further includes: a first joint communicated with the control port; A second joint communicated with the oil inlet; The first and second joints can be switched between working oil and return oil. The non-reverse straight-pull mold clamp as described in claim 2, wherein the control port and the reset chamber are connected by a first flow channel; The oil outlet communicates with the working chamber through a second flow channel. The non-reverse straight-pull mold clamp according to claim 4, wherein the ends of the first runner and the second runner can be blocked by steel balls.

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