Simple safety door protection valve plate device of injection molding machine

Abstract

The utility model discloses a simple safety door protection valve plate device of an injection molding machine, which comprises a mold opening and closing oil cylinder, a mold opening and closing direction valve, a safety door and a hydraulic safety lock, the hydraulic safety lock comprises a control device and a controlled device, the control device comprises a wheel type reversing valve and a valve plate, and the controlled device comprises a safety protection valve plate; the wheel type reversing valve is matched with the safety door pressing strip, the wheel type reversing valve is a three-position four-way valve, the wheel type reversing valve is provided with a wheel type reversing valve hole A, a wheel type reversing valve hole B, a wheel type reversing valve hole P and a wheel type reversing valve hole T, and the wheel type reversing valve hole T is communicated with an oil tank. The safety protection device is linked with the safety door, is simple in structure and can improve the safety protection performance of the injection molding machine during mold opening and closing.

Description

Technical Field

[0001] The utility model relates to the technical field of safety protection devices for injection molding machines, in particular to a simple safety door protection valve plate device for an injection molding machine. Background Art

[0002] During the injection molding production process, if the safety door is not closed when the injection molding machine opens and closes the mold, accidents are likely to occur. Therefore, making the closing of the safety door one of the prerequisites for the opening and closing of the injection molding machine can achieve better safety protection. Utility Model Content

[0003] The utility model aims to increase the safety of an injection molding machine during the process of opening and closing the mold, and provides a simple safety door protection valve plate device for an injection molding machine which is linked with a safety door and has a simple structure and can improve the safety protection performance of the injection molding machine during the process of opening and closing the mold.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A simple safety door protection valve plate device for an injection molding machine, comprising a mold opening and closing oil cylinder, a mold opening and closing directional valve, a safety door, and a hydraulic safety lock, wherein the safety door is provided with a pressure strip; the hydraulic safety lock comprises a control device and a controlled device, wherein the control device comprises a wheel-type reversing valve and a valve plate, and the controlled device comprises a safety protection valve plate; the wheel-type reversing valve is arranged in cooperation with the safety door pressure strip, wherein the wheel-type reversing valve is a three-position four-way valve, wherein the wheel-type reversing valve is provided with a wheel-type reversing valve valve hole A, a wheel-type reversing valve valve hole B, a wheel-type reversing valve valve hole P, and a wheel-type reversing valve valve hole T, wherein the wheel-type reversing valve valve hole T is connected to an oil tank; the valve plate is provided with a valve hole X1 and a valve hole X2, wherein a one-way valve and a first pipe connected to the valve hole X1 and the valve hole X2 are provided in the valve plate The one-way valve is arranged on the second pipeline connected with the valve hole X2, the valve hole X1 is connected with the wheel-type reversing valve valve hole P pipeline, and the valve hole X2 is connected with the wheel-type reversing valve valve hole B pipeline; the safety protection valve plate is arranged between the mold opening and closing directional valve and the valve plate, the mold opening and closing directional valve is provided with directional valve valve hole A, directional valve valve hole B, directional valve valve hole P, directional valve valve hole T, the safety protection valve plate is provided with a third pipeline connected with the directional valve valve hole A and the rod cavity of the mold opening and closing cylinder, the safety protection valve plate is also provided with a fourth pipeline connected with the directional valve valve hole B and the rodless cavity of the mold opening and closing cylinder, and the fourth pipeline is also connected with the first pipeline and the second pipeline in the valve plate; the one-way valve allows pressure oil to enter the wheel-type reversing valve valve hole B in one direction.

[0006] As a preferred solution of the utility model, the safety protection valve plate is integrally arranged with the valve plate.

[0007] As a preferred solution of the utility model, the valve hole A of the wheel-type reversing valve is provided with a detachable plug.

[0008] As a preferred solution of the utility model, the wheel-type reversing valve is a DCG-02-2B2S-Y-32 type reversing valve.

[0009] As a preferred solution of the utility model, the valve hole X1 is connected to the valve hole P of the wheel type reversing valve through a hard pipe, and the valve hole X2 is connected to the valve hole B of the wheel type reversing valve through a hard pipe.

[0010] As a preferred solution of the utility model, the valve hole A of the wheel reversing valve and the valve hole B of the wheel reversing valve are connected by a pipeline in the valve plate, and a plug is provided on the valve hole A of the wheel reversing valve or the valve hole B of the wheel reversing valve.

[0011] This solution is to close or connect the travel switch through the safety door, open and close the mold opening and closing directional valve through the computer, and use the safety door mechanical pressure strip to press down and release the pulley of the safety switch controllable valve (i.e., wheel-type reversing valve) to close the hydraulic oil circuit for safety protection.

[0012] When the safety door is closed, the travel switch is turned on, and through the computer, the mold opening and closing directional valve works, PB and TA are turned on, and the hydraulic oil passes through PB to the X1 end of the valve plate, through the hard pipe to the safety door switch controllable superimposed valve plate, to the safety door switch controllable valve P end to the A end (the A end is a removable plug) blind hole; the hydraulic oil at the X2 end of the valve plate passes through the hard pipe to the controllable superimposed valve plate to the B end of the safety door switch controllable valve, to the T end oil tank; since there is no pressure at the X2 end of the one-way valve, the hydraulic oil passes through the one-way valve to the mold closing cylinder and starts to close the mold. At this time, if the safety door is opened, the travel switch loses power, and the mold opening and closing directional valve stops working; Assume: the safety door has been opened, but the travel switch is damaged and connected, at this time the hydraulic oil passes through PB to the X1 end of the protection valve plate, and since the valve wheel has been pressed down, the hydraulic oil passes through the safety door switch controllable valve PB to the X2 end, and the one-way valve is blocked, and the mold closing hydraulic oil passing through the one-way valve stops working, achieving a safety protection effect.

[0013] If the safety door switch controllable valve requires the valve wheel to be pressed down to work, release the protection, controllable valve stacking valve plate, remove the A end plug, and plug it on the B end. The A end and B1 end of the controllable valve stacking valve plate are connected inside the valve plate).

[0014] This device is more reliable and safer than the electric safety door using the travel switch as the instruction, and it has low manufacturing cost, simple structure and is very convenient to install. It is easy to judge the fault and convenient to maintain. It can be used for electromagnetic mold opening and closing valves with a diameter of 10 mm. The B cavity (rodless cavity) of the mold opening and closing cylinder is used for all hydraulic systems of mold closing. It can be directly superimposed without changing the original hydraulic system and circuit system; if the mold is opened and closed, the A cavity (rod cavity) of the mold opening and closing cylinder is used for mold closing, and the mold closing cylinder oil pipe and electromagnetic reversing valve must be reversed. Those with differential valves cannot be used. The superimposed oil circuit is simple and reliable, does not require debugging, and does not affect the original appearance.

[0015] Compared with the prior art, the utility model has the beneficial effects of being linked with the safety door, having a simple structure, and being able to improve the safety protection performance of the injection molding machine when opening and closing the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the valve plate and the safety protection valve plate of the utility model.

[0018] In the figure: 1. Opening and closing mold cylinder 2. Opening and closing mold directional valve 3. Safety door

[0019] 4. Wheel type reversing valve 5. Valve plate 6. Safety protection valve plate

[0020] 7. Oil tank 51. Valve hole X1 52. Valve hole X2 53. Check valve. DETAILED DESCRIPTION

[0021] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0024] For example, please refer to Figure 1-2 , the utility model provides a technical solution:

[0025] A simple safety door protection valve plate device for an injection molding machine comprises a mold opening and closing oil cylinder 1, a mold opening and closing directional valve 2, a safety door 3, and a hydraulic safety lock, wherein the safety door 3 is provided with a pressure strip; the hydraulic safety lock comprises a control device and a controlled device, wherein the control device comprises a wheel reversing valve 4 and a valve plate 5, and the controlled device comprises a safety protection valve plate 6; the wheel reversing valve 4 is arranged in cooperation with the pressure strip of the safety door 3, the wheel reversing valve 4 is a three-position four-way valve, the wheel reversing valve 4 is provided with a wheel reversing valve valve hole A, a wheel reversing valve valve hole B, a wheel reversing valve valve hole P, and a wheel reversing valve valve hole T, and the wheel reversing valve valve hole T is connected to an oil tank 7; the valve plate 5 is provided with a valve hole X1 51 and a valve hole X2 52, a one-way valve 53 and a first pipeline and a second pipeline respectively connected to the valve hole X1 51 and the valve hole X2 52 are arranged in the valve plate 5, the one-way valve 53 is arranged on the second pipeline connected to the valve hole X2 52, the valve hole X1 51 is connected with the valve hole P pipeline of the wheel-type reversing valve 4, and the valve hole X2 52 is connected with the valve hole B pipeline of the wheel-type reversing valve; the safety protection valve plate 6 is arranged between the mold opening and closing directional valve 2 and the valve plate 5, and the mold opening and closing directional valve 6 is provided with a directional valve valve hole A, a directional valve valve hole B, a directional valve valve hole P, and a directional valve valve hole T. The safety protection valve plate 6 is provided with a third pipeline connected with the directional valve valve hole A and the rod cavity of the mold opening and closing cylinder 1. The safety protection valve plate 6 is also provided with a fourth pipeline connected with the directional valve valve hole B and the rodless cavity of the mold opening and closing cylinder 1. The fourth pipeline is also connected with the first pipeline and the second pipeline in the valve plate 5; the one-way valve 53 allows the pressure oil to enter the valve hole B of the wheel-type reversing valve 4 in one direction.

[0026] The safety protection valve plate 6 is integrally arranged with the valve plate 5 .

[0027] The valve hole A of the wheel-type reversing valve 4 is provided with a removable plug.

[0028] The wheel type reversing valve 4 is a DCG-02-2B2S-Y-32 type reversing valve.

[0029] The valve hole X1 51 is connected to the valve hole P pipeline of the wheel type reversing valve 4 by a hard pipe, and the valve hole X2 52 is connected to the valve hole B pipeline of the wheel type reversing valve 4 by a hard pipe.

[0030] The valve hole A of the wheel reversing valve 4 and the valve hole B of the wheel reversing valve 4 are connected by a pipeline in the valve plate 5, and a plug is provided on the valve hole A of the wheel reversing valve 4 or the valve hole B of the wheel reversing valve 4.

[0031] The working process of the utility model is as follows: when the safety door 3 is closed, the travel switch is turned on, and through the computer, the mold opening and closing directional valve 2 works, PB and TA are turned on, and the hydraulic oil passes through PB to the valve hole X1 51 end of the valve plate 5, to the wheel reversing valve valve hole P of the wheel reversing valve 4 to the wheel reversing valve valve hole A (the A end is a detachable plug) blind hole; the hydraulic oil of the valve hole X2 52 of the valve plate 5 passes through a hard pipe to the wheel reversing valve valve hole B, to the oil tank at the wheel reversing valve valve hole T end; because there is no pressure at the X2 end of the one-way valve 53, the hydraulic oil passes through the one-way valve 53 to the mold opening and closing cylinder 1, and the mold closing starts. At this time, if the safety door 3 is opened, the travel switch loses power, and the wheel reversing valve 4 stops working; Assume: the safety door 3 has been opened, but the travel switch is damaged and connected. At this time, the hydraulic oil passes through PB of the mold opening and closing directional valve 2 to the valve hole X1 of the valve plate 5 At end 51, since the valve wheel has been pressed down, the hydraulic oil passes through PB of the wheel reversing valve 4 of the safety door 3 to the valve hole X2 52 of the valve plate 5, blocking the one-way valve 53, and the mold clamping hydraulic oil passing through the one-way valve 53 stops working, achieving a safety protection effect.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A simple safety door protection valve plate device for an injection molding machine, comprising a mold opening and closing oil cylinder, a mold opening and closing directional valve, and a safety door, characterized in that: It also includes a hydraulic safety lock, and the safety door is provided with a pressure strip; The hydraulic safety lock includes a control device and a controlled device, wherein the control device includes a wheel-type reversing valve and a valve plate, and the controlled device includes a safety protection valve plate; The wheel reversing valve is arranged in cooperation with the safety door pressure strip, the wheel reversing valve is a three-position four-way valve, the wheel reversing valve is provided with a wheel reversing valve valve hole A, a wheel reversing valve valve hole B, a wheel reversing valve valve hole P, and a wheel reversing valve valve hole T, and the wheel reversing valve valve hole T is connected to the oil tank; The valve plate is provided with a valve hole X1 and a valve hole X2, and a one-way valve and a first pipeline and a second pipeline respectively connected to the valve hole X1 and the valve hole X2 are provided in the valve plate, the one-way valve is provided on the second pipeline connected to the valve hole X2, the valve hole X1 is connected to the valve hole P pipeline of the wheel type reversing valve, and the valve hole X2 is connected to the valve hole B pipeline of the wheel type reversing valve; The safety protection valve plate is arranged between the mold opening and closing directional valve and the valve plate. The mold opening and closing directional valve is provided with a directional valve hole A, a directional valve hole B, a directional valve hole P, and a directional valve hole T. The safety protection valve plate is provided with a third pipeline connected with the directional valve hole A and the rod cavity of the mold opening and closing oil cylinder. The safety protection valve plate is also provided with a fourth pipeline connected with the directional valve hole B and the rodless cavity of the mold opening and closing oil cylinder. The fourth pipeline is also connected with the first pipeline and the second pipeline in the valve plate. The one-way valve allows the pressure oil to enter the valve hole B of the wheel-type reversing valve in one direction.

2. The simple safety door protection valve plate device for an injection molding machine according to claim 1, characterized in that: The safety protection valve plate is arranged integrally with the valve plate.

3. The simple safety door protection valve plate device for an injection molding machine according to claim 1, characterized in that: The valve hole A of the wheel-type reversing valve is provided with a detachable plug.

4. The simple safety door protection valve plate device for an injection molding machine according to claim 1, characterized in that: The wheel type reversing valve is a DCG-02-2B2S-Y-32 type reversing valve.

5. The simple safety door protection valve plate device for an injection molding machine according to claim 1, characterized in that: The valve hole X1 is connected to the valve hole P of the wheel type reversing valve through a pipeline using a hard pipe, and the valve hole X2 is connected to the valve hole B of the wheel type reversing valve through a pipeline using a hard pipe.

6. The simple safety door protection valve plate device for an injection molding machine according to claim 4, characterized in that: The valve hole A of the wheel type reversing valve and the valve hole B of the wheel type reversing valve are connected by a pipeline in the valve plate, and a plug is provided on the valve hole A of the wheel type reversing valve or the valve hole B of the wheel type reversing valve.

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