Plastic shell injection mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a plastic shell injection mold, a stepping motor can drive a disc to accurately rotate, and an annular control groove on the front side inclines downwards, so that the disc is automatically separated from an upper mold plate when a lower mold plate is positioned on the front side in the rotating process; the lower mold plates are combined with the upper mold plates when located on the side face and the rear side, the mold can cool a plurality of plastic shells at a time due to the distribution of the upper mold plates and the lower mold plates, and therefore the waiting time during mold cooling is shortened, meanwhile, the rotating shaft is driven by the stepping motor to rotate, the annular control groove and the control rod are matched, and the mold cooling efficiency is improved. The automatic opening and closing action of the mold is achieved, the operation process of the mold is simplified, manual intervention is reduced, the automation degree of production is improved, the production efficiency is greatly improved through the automatic operation mode, and the production period is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and particularly relates to an injection mold for a plastic shell. Background Art

[0002] In the production process of plastic products, injection molds play a crucial role. Especially for the production of plastic shells, the accuracy and production efficiency of injection molds directly affect the quality and production cost of products. However, traditional injection molds for plastic shells can only form one plastic part in one opening and closing process, and the entire production cycle is long due to the occupation of cooling time. This low-efficiency production method is difficult to meet large-scale production. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an injection mold for a plastic shell to solve the problems mentioned in the background art.

[0004] To achieve the above technical purpose, the technical scheme adopted by the utility model is as follows:

[0005] An injection mold for a plastic shell includes a base. A rotating shaft is vertically rotatably connected to the upper side of the base. A disc is concentrically fixed in the middle of the rotating shaft. A plurality of brackets are evenly hinged up and down on the lower side of the disc. A lower template is fixed on the outer side of the brackets. An upper template matching the lower template is fixed on the outer side of the disc. An injection port penetrating up and down is opened on the upper side of the upper template. An annular control groove fixedly connected to the base is installed on the outer side of the disc. A control rod matching the annular control groove is fixed on the outer side of the lower template. The annular control groove is horizontally inclined downward at the front side with the rear side horizontal. A stepping motor drivingly connected to the rotating shaft is installed on the upper side of the base.

[0006] Limit grooves are opened on the middle and adjacent sides of the upper template and the lower template. A chute penetrating up and down is vertically opened in the middle of the limit grooves. A ejector rod is slidably connected up and down in the middle of the limit grooves. A top plate matching the corresponding limit groove is respectively fixed on the adjacent sides of the two ejector rods. A top wheel is rotatably installed on the mutually remote sides of the two ejector rods. A return spring is sleeved on the outer side of the ejector rods. The upper and lower ends of the upper return spring are respectively fixedly connected to the upper side of the upper ejector rod and the upper side of the upper template. The upper and lower ends of the lower return spring are respectively fixedly connected to the lower side of the lower ejector rod and the lower side of the lower template. Trapezoidal blocks symmetrically distributed up and down are fixed on the front side of the annular control groove. The two trapezoidal blocks respectively match the top wheels at the corresponding upper and lower positions.

[0007] Two elastic telescopic rods are installed on the lower side of each bracket. The lower sides of the two elastic telescopic rods are jointly and rotatably connected to a runner. A C-shaped track that matches the runner and is fixed to the base is installed on the lower side of the rear part of the disc. Chamfers are provided on the upper sides of the left and right ends of the C-shaped track.

[0008] Four positioning rods are evenly fixed on the lower side of the upper template, and positioning grooves that match the positioning rods are provided on the upper side of the lower template.

[0009] Both the positioning rods and the positioning grooves are in a tapered shape that is wider at the top and narrower at the bottom.

[0010] The distribution of multiple upper templates and lower templates enables the mold to cool multiple plastic shells at one time, thus shortening the waiting time during mold cooling. At the same time, by driving the rotation of the rotating shaft by a stepper motor and cooperating with the design of the annular control groove and the control rod, the automatic opening and closing action of the mold is realized. This design simplifies the operation process of the mold, reduces manual intervention, and improves the automation degree of production. This automated operation method greatly improves production efficiency and shortens the production cycle. The setting of the ejector rod, the top plate, the limit groove, the top wheel, the trapezoidal block, and the return spring enables the top plate to automatically eject towards the middle when the upper template and the lower template are in the open and closed states, thereby preventing the cooled plastic shell from adhering to the mold and at the same time facilitating the staff to take out the processed plastic parts, improving the usability of the mold. The setting of the elastic telescopic rod, the runner, and the C-shaped track enables the runner to move on the upper side of the C-shaped track through the chamfer when the upper template and the lower template are combined and rotated, and provides a constant thrust for the lower template through the elastic telescopic rod, so that the closing between the lower template and the upper template is tighter, thereby improving the injection precision of the mold and the overall reliability of the mold. The cooperation between the positioning rod and the positioning groove enables the upper template and the lower template to be accurately aligned when combined, and at the same time, the setting of the positioning rod on the upper template makes it more convenient for the staff to take out the processed finished product from the lower template, further improving the usability of the equipment; the design of the positioning rod and the positioning groove body being wider at the top and narrower at the bottom enables the positioning rod to be more conveniently inserted into the inner side of the positioning groove, facilitating mold positioning and also making it have a certain self-adaptability to increase the precision and reliability of the mold. Description of the Drawings

[0011] The present utility model can be further illustrated by the non-limiting embodiments given in the drawings.

[0012] Figure 1 It is a schematic structural diagram of the present utility model.

[0013] Figure 2 It is a schematic partial structural diagram of the present utility model.

[0014] Figure 3 is Figure 2 an enlarged structural diagram of part A in

[0015] Figure 4 This is a schematic diagram of the partial structure of another angle of the utility model.

[0016] Figure 5 It is Figure 4 an enlarged schematic diagram of the structure at position B in

[0017] Base 1, rotating shaft 2, disc 3, bracket 4, lower template 5, upper template 6, injection port 7, annular control groove 8, control rod 9, stepper motor 10, limit groove 11, ejector rod 13, top plate 14, top wheel 15, return spring 16, trapezoidal block 17, elastic telescopic rod 18, runner 19, C-shaped track 20, inclined surface 21, positioning rod 22, positioning groove 23. Specific implementation mode

[0018] In order to enable those skilled in the art to better understand the present utility model, the technical solution of the present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] As Figures 1-5 shown, a plastic shell injection mold includes a base 1, a rotating shaft 2 is vertically rotatably connected to the upper side of the base 1, a disc 3 is concentrically fixed in the middle of the rotating shaft 2, a plurality of brackets 4 are evenly hinged up and down on the lower side of the disc 3, a lower template 5 is fixed on the outer side of the bracket 4, an upper template 6 matching the lower template 5 is fixed on the outer side of the disc 3, an injection port 7 penetrating up and down is opened on the upper side of the upper template 6, an annular control groove 8 fixedly connected to the base 1 is installed on the outer side of the disc 3, a control rod 9 matching the annular control groove 8 is fixed on the outer side of the lower template 5, the annular control groove 8 is integrally inclined downward at the front side and horizontally at the rear side, and a stepper motor 10 drivingly connected to the rotating shaft 2 is installed on the upper side of the base 1.

[0020] When the present utility model is in use, the stepper motor 10 can drive the disc 3 to rotate precisely. Since the annular control groove 8 on the front side is inclined downward, when the lower template 5 is on the front side during the rotation of the disc 3, it will automatically separate from the upper template 6, and when the lower template 5 is on the side and the rear side, it will merge with the upper template 6. The injection equipment is installed on the upper template 6 on the side of the disc 3 and is injected into the cavity formed by the upper template 6 and the lower template 5 through the injection port 7.

[0021] The distribution of multiple upper templates 6 and lower templates 5 enables the mold to cool multiple plastic shells at one time, thereby shortening the waiting time during mold cooling. At the same time, by driving the rotating shaft 2 to rotate by the stepper motor 10 and cooperating with the design of the annular control groove 8 and the control rod 9, the automatic opening and closing action of the mold is realized. This design simplifies the operation process of the mold, reduces manual intervention, improves the automation degree of production, and this automatic operation method greatly improves production efficiency and shortens the production cycle.

[0022] On the upper template 6 and the middle part of the lower template 5 near one side, limit slots 11 are provided. In the middle of the limit slots 11, vertical sliding slots penetrating up and down are provided. In the middle of the sliding slots, ejector rods 13 are slidably connected up and down. On the near sides of the two ejector rods 13, top plates 14 matching the corresponding limit slots 11 are respectively fixed. On the mutually remote sides of the two ejector rods 13, top wheels 15 are rotatably installed. On the outer sides of the ejector rods 13, return springs 16 are sleeved. The upper and lower ends of the upper return spring 16 are respectively fixedly connected to the upper side of the upper ejector rod 13 and the upper side of the upper template 6. The upper and lower ends of the lower return spring 16 are respectively fixedly connected to the lower side of the lower ejector rod 13 and the lower side of the lower template 5. On the front side of the annular control groove 8, trapezoidal blocks 17 symmetrically distributed up and down are fixed. The two trapezoidal blocks 17 respectively match the top wheels 15 at the corresponding upper and lower positions.

[0023] On the upper template 6 and the middle part of the lower template 5 near one side, limit slots 11 are provided to limit the movement range of the top plate 14. When the top wheel 15 does not contact the trapezoidal block 17 in cooperation with the return spring 16, the top plate 14 and the mold form a complete whole. The settings of the ejector rod 13, the top plate 14, the limit slot 11, the top wheel 15, the trapezoidal block 17, and the return spring 16 enable the top plate 14 to automatically eject towards the middle when the upper template 6 and the lower template 5 are in the open and closed states, thereby preventing the cooled plastic shell from adhering to the mold, and at the same time facilitating the staff to take out the processed plastic parts, improving the use convenience of the mold.

[0024] On the lower side of each support 4, two elastic telescopic rods 18 are installed. The lower sides of the two elastic telescopic rods 18 are jointly rotatably connected to a runner 19. On the lower side of the rear part of the disc 3, a C-shaped track 20 matching the runner 19 and fixed to the base 1 is installed. On the upper sides of the left and right ends of the C-shaped track 20, inclined surfaces 21 are provided.

[0025] The settings of the elastic telescopic rod 18, the runner 19, and the C-shaped track 20 enable the runner 19 to move on the upper side of the C-shaped track 20 through the inclined surface 21 when the upper template 6 and the lower template 5 are in the combined rotation state, and provide a constant thrust for the lower template 5 through the elastic telescopic rod 18, so that the lower template 5 and the upper template 6 are closed more tightly, thereby improving the injection precision of the mold and the overall reliability of the mold.

[0026] On the lower side of the upper template 6, four positioning rods 22 are uniformly fixed. On the upper side of the lower template 5, positioning slots 23 matching the positioning rods 22 are provided.

[0027] The positioning rods 22 and the positioning slots 23 as a whole are in a tapered shape with a wider upper part and a narrower lower part.

[0028] The cooperation between the positioning rod 22 and the positioning groove 23 enables the upper template 6 and the lower template 5 to be accurately aligned when they are combined, and at the same time, the positioning rod 22 is arranged on the upper template 6, which is more convenient for the staff to take out the processed finished product from the lower template 5, further improving the convenience of using the equipment; the positioning rod 22 and the positioning groove 23 are designed with a wider upper part and a narrower lower part, so that the positioning rod 22 can be more conveniently inserted into the inner side of the positioning groove 23, facilitating the positioning of the mold and at the same time making it have a certain self - adaptability to increase the accuracy and reliability of the mold.

[0029] The above - mentioned embodiments only exemplarily illustrate the principles and effects of the present invention, rather than being used to limit the present invention. Any person familiar with this technology can modify or change the above - mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A plastic housing injection mold, comprising a base, characterized in that: A rotating shaft is vertically rotatably connected to the upper side of the base, a disc is concentrically fixed to the middle of the rotating shaft, a plurality of brackets are evenly hinged up and down on the lower side of the disc, a lower template is fixed to the outer side of the bracket, an upper template matching the lower template is fixed to the outer side of the disc, an injection port penetrating up and down is opened on the upper side of the upper template, an annular control groove fixedly connected to the base is installed on the outer side of the disc, a control rod matching the annular control groove is fixed to the outer side of the lower template, the annular control groove as a whole is horizontal at the rear side and inclined downward at the front side, and a stepping motor transmission-connected to the rotating shaft is installed on the upper side of the base.

2. A plastic housing injection mold according to claim 1, characterized in that: The upper template and the lower template are both provided with a limiting groove on one side close to the middle part, and the limiting groove is vertically provided with a sliding groove running through the upper and lower parts in the middle part, and a push rod is slidably connected to the middle part of the sliding groove up and down, and a top plate matching the corresponding limiting groove is fixed on one side of the two push rods respectively, and a top wheel is rotatably installed on the side where the two push rods are away from each other, and a return spring is sleeved on the outer side of the push rod, and the upper and lower ends of the return spring on the upper side are respectively fixedly connected to the upper side of the upper push rod and the upper side of the upper template, and the upper and lower ends of the return spring on the lower side are respectively fixedly connected to the lower side of the lower push rod and the lower side of the lower template, and a trapezoidal block symmetrically distributed up and down is fixed on the front side of the annular control groove, and the two trapezoidal blocks are respectively matched with the top wheels at corresponding upper and lower positions.

3. The plastic housing injection mold according to claim 2, characterized in that: Two elastic telescopic rods are installed on the lower side of each bracket, and the lower sides of the two elastic telescopic rods are connected to a rotating wheel for common rotation. A C-shaped track matching the rotating wheel and fixed to the base is installed on the lower side of the rear part of the disc, and inclined surfaces are provided on the upper sides of the left and right ends of the C-shaped track.

4. The plastic housing injection mold according to claim 3, characterized in that: Four positioning rods are evenly fixed on the lower side of the upper template, and positioning grooves matching the positioning rods are opened on the upper side of the lower template.

5. The plastic housing injection mold according to claim 4, characterized in that: The positioning rod and the positioning groove are generally in a tapered shape that is wider at the top and narrower at the bottom.

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