Counter shaft cap injection mold

Abstract

The utility model discloses a counter shaft cover injection mold which is simpler in structure, easy to demold and high in production efficiency. According to the technical scheme, the mold comprises an upper mold plate and a lower mold plate, the upper mold plate is provided with a set of cover plate cavities communicated through a runner, the lower mold plate is provided with a hook cavity and a buckle cavity which correspond to the cover plate cavities, the buckle cavity is composed of two movable cores and two positioning pins, and the two movable cores and the two positioning pins are arranged on the upper mold plate. A spring is arranged between the two movable cores, the bottoms of the two movable cores are rotatably connected with the lower mold plate through a rotating shaft, the positioning pins are fixed on the upper mold plate, and after the upper mold plate and the lower mold plate are closed, the positioning pins are in pin joint with the two sides of the movable cores.

Description

Technical Field

[0001] The utility model belongs to the field of injection molds, and in particular relates to an injection mold for a shaft cover of a counter. Background Art

[0002] The structure of the counter shaft cover is as follows Fig. 9 As shown, it includes a cover plate 22 and a hook 23 and an elastic buckle 24 integrally formed at the bottom of the cover plate 22. Since the elastic buckle 24 is composed of two half-axes with barbs, it cannot be directly ejected from the buckle cavity by an ejector after injection molding. Traditionally, a slider core-pulling structure is usually adopted. When demolding, the slider core-pulling is slid to both sides to facilitate the removal of the shaft cover. The disadvantages of using a slider core-pulling structure are: 1. The structure is complex, the volume is large, and it is easy to fail, which brings inconvenience to production; 2. Due to the large volume and the large space occupied, the traditional mold can usually only achieve a 1-out-2 production method, and the production efficiency is low. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a counter shaft cover injection mold with simpler structure, easy demoulding and high production efficiency.

[0004] In order to solve the above problems, the technical solution adopted by the utility model includes: an upper template and a lower template, the upper template is provided with a group of cover plate cavities connected through a flow channel, and the lower template is provided with a hook cavity and a buckle cavity corresponding to the cover plate cavity, characterized in that: the buckle cavity is composed of two movable cores and two locating pins, a spring is provided between the two movable cores, and the bottom is rotatably connected to the lower template through a rotating shaft, the locating pin is fixed on the upper template, and after the upper template and the lower template are molded together, the locating pin is connected to both sides of the movable core.

[0005] The injection mold for the counter shaft cover is characterized in that positioning grooves are provided on both sides of the movable core, and the lower mold plate is provided with positioning protrusions that are positioned and matched with the positioning grooves.

[0006] The injection mold for the shaft cover of the counter is characterized in that a stripping plate is provided below the lower mold plate, and an upper mold plate ejector, a waste ejector and a shaft cover ejector are provided on the stripping plate.

[0007] The injection mold for the counter shaft cover is characterized in that: the lower mold plate is provided with embedding grooves for embedding the positioning pins on both sides corresponding to the movable core, and the embedding grooves are embedded with pads.

[0008] The counter shaft cover injection mold is characterized in that a guide column is provided between the upper mold plate and the lower mold plate.

[0009] The injection mold for the counter shaft cover is characterized in that a first guiding inclined surface is provided on the side surface of the movable core, and a second guiding inclined surface is provided on the side surface of the positioning pin to cooperate with the first guiding inclined surface.

[0010] The advantages of the injection mold for the shaft cover of the counter of the utility model are as follows: 1. When the upper mold plate is opened, the positioning pin is driven away from the movable core, and the movable core is automatically opened under the action of the spring, so that the shaft cover can be smoothly taken out, and demolding is more convenient; 2. Due to the shedding structure, the structure is simple, the volume is small, and the space occupied by the mold is small, so that a production method of 1 out of 12 (or even more) can be achieved on the mold.

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of the injection mold of the shaft cover of the counter of the utility model;

[0013] Figure 2 yes Figure 1 AA cross-sectional view;

[0014] Figure 3 yes Figure 1 A cross-sectional view of BB;

[0015] Figure 4 It is a structural schematic diagram of the lower template, the hook cavity and the buckle cavity of the utility model;

[0016] Figure 5 It is a structural schematic diagram of the upper template of the utility model;

[0017] Figure 6 It is a structural schematic diagram of the lower template of the utility model;

[0018] Figure 7 It is a structural schematic diagram of the buckle cavity of the utility model;

[0019] Figure 8 It is an exploded view of the buckle cavity of the utility model;

[0020] Fig. 9 It is a structural schematic diagram of a shaft cover of a counter of the utility model. DETAILED DESCRIPTION

[0021] like Figures 1 to 9As shown, the injection mold of the shaft cover of the counter of the utility model comprises an upper mold plate 1 and a lower mold plate 2. The upper mold plate 1 is provided with a group of cover plate cavities 4 connected through a flow channel 3, and the lower mold plate 2 is provided with a hook cavity 5 and a buckle cavity 6 corresponding to the cover plate cavity 4. The buckle cavity 6 is composed of two movable cores 7 and two positioning pins 8. A spring 9 is provided between the two movable cores 7, and the bottom of the movable core 7 is rotatably connected to the lower mold plate 2 through a rotating shaft 10. The positioning pin 8 is fixed on the upper mold plate 1. When the upper mold plate 1 and the lower mold plate 2 are molded, the positioning pin 8 is pinned to the two sides of the movable core 7 to close the two movable cores 7. When the upper mold plate is opened, the positioning pin is driven away from the movable core, and the movable core automatically opens under the action of the spring.

[0022] Preferably, positioning grooves 11 are provided on both sides of the movable core 7, and the lower template 2 is provided with positioning protrusions 12 that are positioned and matched with the positioning grooves 11. The positioning protrusions 12 cooperate with the positioning grooves 11 to position the movable core 7 after closing to improve stability.

[0023] Preferably, a stripping plate 13 is provided below the lower mold plate 2, and an upper mold plate ejector pin 14, a waste ejector pin 15 and a shaft cover ejector pin 16 are provided on the stripping plate 13. During demoulding, the stripping plate 13 and the upper mold plate ejector pin 14, the waste ejector pin 15 and the shaft cover ejector pin 16 are pushed up by a cylinder, and the upper mold plate 1 is opened by the pushing up of the upper mold plate ejector pin 14, and the waste is ejected from the lower mold plate 2 by the pushing up of the waste ejector pin 15, and the counter shaft cover is ejected from the lower mold plate 2 by the shaft cover ejector pin 16, so that the counter shaft cover can be taken out more easily.

[0024] Preferably, the lower template 2 is provided with an embedding groove 17 for embedding the positioning pin 8 on both sides corresponding to the movable core 7, and a pad 18 is embedded in the embedding groove 17. When the upper template 1 and the lower template 2 are molded together, the top of the positioning pin 8 is embedded in the embedding groove 17, and the two sides are respectively positioned on the pad 18 and the movable core 7 to improve stability and thus improve injection molding accuracy.

[0025] Preferably, a guide column 19 is provided between the upper template 1 and the lower template 2 to improve the precision of opening and closing the upper template 1 and the lower template 2.

[0026] Preferably, the movable core 7 is provided with a first guide inclined surface 20 on its side, and the positioning pin 8 is provided with a second guide inclined surface 21 on its side to cooperate with the first guide inclined surface 20 , so that the positioning pin 8 can be accurately inserted into both sides of the movable core 7 .

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. An injection mold for a shaft cover of a counter, comprising an upper mold plate (1) and a lower mold plate (2), wherein the upper mold plate (1) is provided with a group of cover plate cavities (4) connected through a flow channel (3), and the lower mold plate (2) is provided with a hook cavity (5) and a buckle cavity (6) corresponding to the cover plate cavity (4), characterized in that: The buckle cavity (6) is composed of two movable cores (7) and two positioning pins (8). A spring (9) is provided between the two movable cores (7), and the bottom is rotatably connected to the lower mold plate (2) via a rotating shaft (10). The positioning pins (8) are fixed on the upper mold plate (1). After the upper mold plate (1) and the lower mold plate (2) are molded together, the positioning pins (8) are pinned to both sides of the movable core (7).

2. The counter shaft cover injection mold according to claim 1, characterized in that: Positioning grooves (11) are provided on both sides of the movable core (7), and a positioning protrusion (12) that is positioned and matched with the positioning grooves (11) is provided on the lower template (2).

3. The counter shaft cover injection mold according to claim 1, characterized in that: A stripping plate (13) is provided below the lower plate (2), and an upper plate ejector pin (14), a waste ejector pin (15) and a shaft cover ejector pin (16) are provided on the stripping plate (13).

4. The counter shaft cover injection mold according to claim 1, characterized in that: The lower template (2) is provided with embedding grooves (17) for embedding the positioning pins (8) on both sides corresponding to the movable core (7), and the embedding grooves (17) have pads (18) embedded therein.

5. The counter shaft cover injection mold according to claim 1, characterized in that: A guide column (19) is provided between the upper template (1) and the lower template (2).

6. The counter shaft cover injection mold according to claim 1, characterized in that: The movable core (7) has a first guiding inclined surface (20) on its side, and the positioning pin (8) has a second guiding inclined surface (21) on its side for guiding and matching with the first guiding inclined surface (20).

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