Automatic resetting mechanism for top plate of injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold top plate automatic reset mechanism which comprises a male mold plate fixedly connected to the upper end of a positioning plate and used for positioning, the lower end of the positioning plate is connected with a connecting plate used for fixing through a bolt, and the upper end of the connecting plate is connected with a bearing plate used for lifting in a clamped mode. The upper end of the bearing plate is fixedly connected with an ejector pin used for positioning, the outer surface of the ejector pin is sleeved with a spring used for buffering, and the lower end of the bearing plate is in threaded connection with a motor used for providing power. According to the automatic resetting mechanism for the ejection plate of the injection mold, the bearing plate, the ejector pin and the spring are arranged in a matched manner, so that the ejector pin can be limited when the ejector pin is reset, and the situation that materials in a male mold plate are damaged and inconvenience is caused due to reset deviation of the ejector pin is avoided; and the ejector pin can be more stable when being ejected or reset, so that the problem of shaking of the ejector pin is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and specifically relates to an automatic reset mechanism for the top plate of an injection mold. Background Art

[0002] During the mold opening process of an injection mold, the ejector pin needs to be driven by the top plate to eject the molded plastic part from the mold core. After the mold opening action is completed, the top plate needs to be reset to drive the ejector pin to reset. In an injection mold, a return spring is often used to ensure the reset of the top plate.

[0003] Chinese Patent Publication No. CN206796459U discloses an external top plate prior reset device for an injection mold, including a plug rod, a guide block, a push rod and a rotating shaft. The plug rod adopted in the utility model is in the shape of a rectangular rod. The guide block is provided with a guide groove, and the guide groove is provided with a converging inclined surface and a diverging inclined surface. The push rod is provided with a push inclined surface, a contact inclined surface and a rotating shaft hole; the lower end of the plug rod faces downward, and the upper end of the plug rod is fixed on the outer side surface of the stationary mold; the guide groove of the guide block corresponds to the plug rod, and the guide block is fixedly connected to the outer side surface of the moving mold; the upper ends of two spaced and juxtaposed push rods face upward, corresponding to the guide groove of the guide block, and the lower ends of the push rods are rotatably connected to the side surface of the top plate through a rotating shaft. During the mold closing operation, the plug rod pushes the push rod to drive the top plate to be reset first, so that the prior reset mechanism of the top plate of the injection mold achieves the purpose of reducing costs and reliable operation.

[0004] However, when this utility model is actually used, the following problems exist:

[0005] 1. In the existing device, after injection molding is completed, when the ejector pin is reset, it is relatively easy to deviate, which easily causes problems with the molded product.

[0006] 2. When the existing device is in use, it is relatively easy to have the ejector pin overtravel, and it is not convenient to limit the position where the ejector pin ejects, resulting in low practicability of the device. Summary of the Utility Model

[0007] (1) Technical Problems to be Solved

[0008] In order to overcome the above-mentioned defects of the prior art, the utility model provides an automatic reset mechanism for the top plate of an injection mold, which solves the problems that in the existing device after injection molding is completed, when the ejector pin is reset, it is relatively easy to deviate, which easily causes problems with the molded product, and when the existing device is in use, it is relatively easy to have the ejector pin overtravel, and it is not convenient to limit the position where the ejector pin ejects, resulting in low practicability of the device as mentioned in the above background art.

[0009] (2) Technical Solutions

[0010] To achieve the above object, the utility model is realized by the following technical solutions: An automatic reset mechanism for the top plate of an injection mold, including a male template for positioning fixedly connected to the upper end of a positioning plate. The lower end of the positioning plate is connected with a connecting plate for fixing by bolts. The upper end of the connecting plate is clamped with a load-bearing plate for lifting. The upper end of the load-bearing plate is fixedly connected with a thimble for positioning. A spring for buffering is sleeved on the outer surface of the thimble. The lower end of the load-bearing plate is threadedly connected with a motor for providing power.

[0011] Optionally, a template groove for injection molding is provided at the upper end of the male template, and a retraction hole for positioning is provided at the inner bottom wall of the template groove.

[0012] Optionally, a connection hole for positioning is provided at the upper end of the male template, and a groove for exhausting air is provided at the upper end of the male template.

[0013] Optionally, a lower fixing plate for fixing is sleeved on the outer surface of the motor, and a clamping hole for connection is provided at the upper end of the lower fixing plate.

[0014] Optionally, a positioning pin for limiting is inserted into the upper surface of the positioning plate, and the positioning pin penetrates through one side of the positioning plate and is inserted into the interior of the load-bearing plate.

[0015] Optionally, an upper fixing plate for limiting is clamped at the upper end of the positioning plate, and an injection hole for limiting is provided at the upper end of the upper fixing plate.

[0016] Optionally, a template for limiting is fixedly connected to the lower end of the upper fixing plate, and a connecting column for positioning is fixedly connected to the lower end of the upper fixing plate.

[0017] Optionally, a fixing groove for limiting is provided at the upper end of the connecting plate, and a positioning hole for connection is provided at the upper end of the connecting plate.

[0018] (III) Beneficial effects

[0019] The utility model provides an automatic reset mechanism for the top plate of an injection mold, which has the following beneficial effects:

[0020] 1. For this automatic reset mechanism for the top plate of an injection mold, through the combined setting of the load-bearing plate, thimble and spring, it can limit the thimble during its reset process, avoiding deviation in its reset and causing damage to the material inside the male template, resulting in inconvenience. At the same time, with the combined setting of the connecting plate and the load-bearing plate, the thimble can be more stable when ejecting or resetting, avoiding the problem of shaking.

[0021] 2. The automatic reset mechanism of the ejector plate of this injection mold, through the cooperation of a spring and a connecting plate, can limit the ejection height of the ejector pin when the ejector pin pushes the finished product inside the male template, avoiding excessive ejection and damaging the finished product. At the same time, with the setting of the motor, the ejector pin can be ejected more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural view of the present invention;

[0023] Figure 2 is a schematic structural view of the male template of the present invention;

[0024] Figure 3 is a schematic structural view of the positioning plate of the present invention;

[0025] Figure 4 is a schematic structural view of the motor of the present invention;

[0026] Figure 5 is a schematic structural view of the connecting plate of the present invention;

[0027] Figure 6 is a schematic structural view of the fixed plate of the present invention.

[0028] In the figure: 1. Positioning plate; 2. Male template; 3. Connecting plate; 4. Load-bearing plate; 5. Ejector pin; 6. Spring; 7. Motor; 8. Template groove; 9. Retraction hole; 10. Connecting hole; 11. Groove; 12. Lower fixed plate; 13. Card hole; 14. Positioning pin; 15. Upper fixed plate; 16. Injection hole; 17. Template; 18. Connecting column; 19. Fixed groove; 20. Positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1;

[0031] Please refer to Figures 1 to 6, in order to more conveniently limit its injection molding material, the present utility model provides a technical solution: an automatic reset mechanism for the top plate of an injection mold, which includes a male mold plate 2 for positioning fixedly connected to the upper end of a positioning plate 1. There is a template groove 8 for injection molding at the upper end of the male mold plate 2. A retraction hole 9 for positioning is provided on the inner bottom wall of the template groove 8. A connection hole 10 for positioning is provided at the upper end of the male mold plate 2. A groove 11 for exhaust is provided at the upper end of the male mold plate 2. By means of the setting of the template groove 8, the injection molding material can be limited. Through the setting of the retraction hole 9, the ejector pin 5 can be limited. At the same time, by means of the setting of the connection hole 10, the template 17 can be connected and limited;

[0032] Embodiment Two;

[0033] Please refer to Figures 1 to 4 , in order to limit and fix the bearing plate 4 to prevent it from being misaligned, a connecting plate 3 for fixing is connected to the lower end of the positioning plate 1 by bolts. A fixing groove 19 for limiting is provided at the upper end of the connecting plate 3. A positioning hole 20 for connection is provided at the upper end of the connecting plate 3. A bearing plate 4 for lifting is clamped at the upper end of the connecting plate 3. A positioning pin 14 for limiting is inserted into the upper surface of the positioning plate 1. The positioning pin 14 penetrates through one side of the positioning plate 1 and is inserted into the interior of the bearing plate 4. An ejector pin 5 for positioning is fixedly connected to the upper end of the bearing plate 4. By means of the setting of the fixing groove 19, the bearing plate 4 can be limited and fixed to prevent it from being misaligned. By means of the setting of the positioning pin 14, the bearing plate 4 can be more conveniently connected to the positioning plate 1, making it more firm during use;

[0034] Embodiment Three;

[0035] Please refer to Figures 2 to 6 , in order to more conveniently protect the motor 7, a spring 6 for buffering is sleeved on the outer surface of the ejector pin 5. A motor 7 for providing power is threadedly connected to the lower end of the bearing plate 4. A lower fixing plate 12 for fixing is sleeved on the outer surface of the motor 7. A clamping hole 13 for connection is provided at the upper end of the lower fixing plate 12. An upper fixing plate 15 for limiting is clamped at the upper end of the positioning plate 1. An injection hole 16 for limiting is provided at the upper end of the upper fixing plate 15. A template 17 for limiting is fixedly connected to the lower end of the upper fixing plate 15. A connecting column 18 for positioning is fixedly connected to the lower end of the upper fixing plate 15. By means of the setting of the lower fixing plate 12, the motor 7 can be limited and protected, and at the same time, the whole can be supported. By means of the setting of the upper fixing plate 15, the template 17 can be more conveniently connected, enabling the staff to more quickly place the template 17 into the template groove 8 to press the material.

[0036] All the electrical components mentioned in this article are electrically connected to the external main controller and the 220V mains power supply, and the main controller can be a conventional known device such as a computer for control purposes.

[0037] In the present utility model, the working steps of the device are as follows:

[0038] First, the staff sends the material through the injection hole 16 to the inside of the template groove 8 inside the male template 2, presses it, and after the pressing is completed, opens the upper fixing plate 15 at the upper end of the male template 2, starts the motor 7, drives the bearing plate 4 to move upward through the motor 7, and uses the ejector pin 5 at the upper end of the bearing plate 4 to push out the finished product inside the template groove 8.

[0039] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic reset mechanism for the top plate of an injection mold, comprising a male mold plate (2) fixedly connected to the upper end of a positioning plate (1) for positioning, characterized in that: The lower end of the positioning plate (1) is connected by bolts to a connecting plate (3) for fixation. The upper end of the connecting plate (3) is snap-connected to a load-bearing plate (4) for lifting. The upper end of the load-bearing plate (4) is fixedly connected to a thimble (5) for positioning. A spring (6) for buffering is sleeved on the outer surface of the thimble (5). The lower end of the load-bearing plate (4) is threadedly connected to a motor (7) for providing power.

2. The automatic reset mechanism for the top plate of an injection mold according to claim 1, wherein: At the upper end of the male template (2), there is a template groove (8) for injection molding. A retraction hole (9) for positioning is opened on the inner bottom wall of the template groove (8).

3. An automatic reset mechanism for the top plate of an injection mold according to claim 1, characterized in that: At the upper end of the male template (2), a connection hole (10) for positioning is opened. At the upper end of the male template (2), a groove (11) for exhausting air is opened.

4. An automatic reset mechanism for the top plate of an injection mold according to claim 1, characterized in that: The outer surface of the motor (7) is sleeved with a lower fixing plate (12) for fixation. A clamping hole (13) for connection is opened at the upper end of the lower fixing plate (12).

5. An automatic reset mechanism for the top plate of an injection mold according to claim 1, characterized in that: A positioning pin (14) for limiting is inserted into the upper surface of the positioning plate (1). The positioning pin (14) penetrates through one side of the positioning plate (1) and is inserted into the interior of the load-bearing plate (4).

6. The automatic reset mechanism for the top plate of an injection mold according to claim 1, wherein: The upper end of the positioning plate (1) is snap-connected to an upper fixing plate (15) for limiting. An injection molding hole (16) for limiting is opened at the upper end of the upper fixing plate (15).

7. An automatic reset mechanism for the top plate of an injection mold according to claim 6, characterized in that: The lower end of the upper fixing plate (15) is fixedly connected to a template (17) for limiting. The lower end of the upper fixing plate (15) is fixedly connected to a connecting column (18) for positioning.

8. An automatic reset mechanism for the top plate of an injection mold according to claim 1, characterized in that: At the upper end of the connecting plate (3), a fixing groove (19) for limiting is opened. At the upper end of the connecting plate (3), a positioning hole (20) for connection is opened.

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