Plastic top cover forming mold

Abstract

The utility model discloses a plastic top cover forming die which comprises an upper die forming plate and a lower die forming plate, the upper die forming plate and the lower die forming plate are overlapped up and down to form a forming assembly, two top cover forming die cavities are formed between the upper die forming plate and the lower die forming plate, the upper die forming plate is provided with a material channel, and the material channel is communicated with the two top cover forming die cavities. The two top cover forming die cavities are symmetrically distributed on the two sides of the material channel, the lower die forming plate is provided with a male die core, the male die core is provided with four vertex angles, the four vertex angles and the center of the male die core are each provided with a first needle hole, and a first ejector pin capable of moving in the axial direction of the needle hole is arranged in each first needle hole. The ejector pins are reasonably distributed, so that the top cover is uniformly stressed when being ejected out.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a plastic top cover forming mold. Background Art

[0002] The top cover of a water purifier is made of plastic and is typically manufactured using an injection mold. In existing injection molds, the ejector pins used to eject the top cover are poorly arranged. Specifically, the pins are unevenly arranged, resulting in uneven force during ejection and slight deformation of the outer surface. Therefore, improvements are needed to existing injection molds for water purifier top covers. Summary of the Invention

[0003] The utility model aims to provide a plastic top cover forming die, wherein the ejector pins in the forming assembly of the die are arranged reasonably, so that the ejector pins are evenly stressed during demoulding of the top cover and the forming quality of the ejector pins is improved.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a plastic top cover forming mold, comprising an upper mold forming plate and a lower mold forming plate, the upper mold forming plate and the lower mold forming plate are overlapped up and down to form a forming assembly, two top cover forming cavities are formed between the upper mold forming plate and the lower mold forming plate, the upper mold forming plate is provided with a material channel, the material channel is connected with the two top cover forming cavities, and the two top cover forming cavities are symmetrically distributed on both sides of the material channel, the lower mold forming plate is provided with a punch core, the punch core has four vertex corners, and the four vertex corners and the center of the punch core are provided with a first pinhole, and each of the first pinholes is provided with a first ejector that can move along the axial direction of the pinhole.

[0005] Compared to the prior art, the advantages of the present invention are that the mold, through its optimized design, ensures uniform force distribution during demolding, improving the molding quality of the top cover. Specifically, the mold comprises an upper mold plate and a lower mold plate, which are superimposed on each other to form a molding assembly, with two top cover molding cavities formed in the middle. This design not only improves mold utilization but also enables the simultaneous production of two top covers, enhancing production efficiency. The material channel provided on the upper mold plate is connected to the two top cover molding cavities, and the two cavities are symmetrically distributed on either side of the channel, ensuring balanced material flow and making the molding of the top cover more uniform and consistent. In particular, the punch provided on the lower mold plate has first pinholes at its four corners and center, and each pinhole is provided with a first ejector pin that can move axially along the pinhole. This evenly distributed ejector pin design ensures that the force applied to each part of the top cover during demolding is evenly distributed, avoiding deformation of the top cover caused by uneven force distribution. Therefore, the present invention's plastic top cover molding mold not only improves the molding quality of the top cover but also enhances production efficiency.

[0006] In some embodiments of the present invention, the punch core includes a bump and a groove disposed around the bump. The bump protrudes from the top surface of the groove. The first pinholes at the four corners are located in the groove, and the first pinhole at the center of the punch core is located in the bump. This design, by locating the first pinholes at the corners of the groove and at the center of the bump, ensures that the ejector pins can apply force evenly during demolding, avoiding deformation of the top cover due to uneven force during demolding and improving the quality of the finished top cover.

[0007] In some embodiments of the present invention, the protrusion is provided with a mold hole, a first core post is disposed within the mold hole, a molding gap is defined between the first core post and the mold hole, and the groove is further provided with a second pinhole, the second pinhole being located between the two first pinholes in the groove and directly opposite the first pinhole in the protrusion, with the first core post located between the first and second pinholes. This design ensures uniform distribution of the plastic material during the molding process through the molding gap between the first core post and the mold hole. Furthermore, the design of the second pinhole further optimizes the layout of the ejector pins, ensuring the stability of the top cover during demolding.

[0008] In some embodiments of the present invention, the upper mold forming plate is provided with a female mold core capable of engaging with the male mold core, and the female mold core is provided with a second core column that abuts the first core column. The cooperation between the female and male mold cores ensures a tight seal when the mold is closed, while the design of the second core column abutting the first core column ensures alignment accuracy when the mold is closed, further improving the molding quality of the top cover.

[0009] Some embodiments of the present invention further include a mold frame comprising an upper mold frame and a lower mold frame. The upper mold frame and the lower mold frame are combined to form a space therebetween for accommodating the molding assembly. The upper mold frame is connected to the upper molding plate, and the lower mold frame is connected to the lower molding plate. The mold frame design allows the various parts of the mold to be combined in an orderly manner, ensuring the stability and structural integrity of the mold and facilitating production and maintenance.

[0010] Some embodiments of the present invention further include a mold frame, wherein the upper mold frame is provided with a first water transport structure, and the lower mold frame is provided with a second water transport structure. The design of the first and second water transport structures facilitates cooling of the mold, ensuring temperature control during the molding process, and improving molding quality and production efficiency of the top cover.

[0011] In some embodiments of the present invention, the upper mold frame is connected to an upper mold plate, and the upper mold plate is provided with a feed port that is connected to the feed channel. The feed port is designed for injecting plastic material, and the connection between the feed port on the upper mold plate and the feed channel ensures that the material can flow smoothly into the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural diagram of the molding component;

[0013] Figure 2 It is a cross-sectional view of the molding component;

[0014] Figure 3 It is the three-dimensional structure diagram of the lower template;

[0015] Figure 4 It is the three-dimensional structure diagram of the upper template;

[0016] Figure 5 This is a cross-sectional view of the utility model;

[0017] Figure 6 It is a three-dimensional diagram of the utility model.

[0018] In the figure: 1. Upper die forming plate; 2. Lower die forming plate; 4. Top cover forming cavity; 5. Material channel; 6. Punch core; 8. First pinhole; 10. Bump; 11. Groove; 13. First core column; 14. Forming gap; 15. Second pinhole; 16. Die core; 17. Second core column; 19. Upper die frame; 20. Lower die frame; 21. First water transport structure; 22. Second water transport structure; 23. Upper die plate; 24. Material inlet. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0022] The terms "including" and "having" and any variations thereof in the description and claims of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0023] See also Figure 1-Figure 3 , a plastic top cover forming mold, including a forming assembly, the forming assembly includes an upper mold forming plate 1 and a lower mold forming plate 2, the upper mold forming plate 1 and the lower mold forming plate 2 are overlapped up and down and a seal is formed between the two; two top cover forming cavities 4 are formed between the upper mold forming plate 1 and the lower mold forming plate 2, the upper mold forming plate 1 is provided with a material channel 5, the material channel 5 is connected with the two top cover forming cavities 4, and the two top cover forming cavities 4 are symmetrically distributed on both sides of the material channel 5, and the molten material can be filled into the two cavities respectively through the material channel 5, thereby forming a top cover; the lower mold forming plate 2 is provided with a punch core 6, the punch core 6 has four vertex corners, and the four vertex corners and the center of the punch core 6 are all provided with a first pinhole 8, and each first pinhole 8 is provided with a first ejector which can move along the axial direction of the pinhole; the first ejector is connected to the ejector plate assembly in the mold, and when the ejector plate assembly moves, it drives the ejector pin to eject the formed top cover.

[0024] In the above structure: the mold ensures the uniformity of force on the top cover during demoulding through optimized design, thereby improving the molding quality of the top cover. Specifically, the mold includes an upper mold forming plate 1 and a lower mold forming plate 2, which are superimposed on each other to form a molding assembly, and two top cover molding cavities 4 are formed in the middle. This design not only improves the utilization rate of the mold, but also can produce two top covers at the same time, thereby improving production efficiency. The material channel 5 provided on the upper mold forming plate 1 is connected to the two top cover molding cavities 4, and the two cavities are symmetrically distributed on both sides of the material channel 5, ensuring the balance of material flow and making the molding of the top cover more uniform and consistent. In particular, the punch core 6 provided on the lower mold forming plate 2 is provided with a first pinhole 8 at its four top corners and the center, and a first ejector pin that can move along the axial direction of the pinhole is provided in each pinhole. This evenly distributed ejector pin design ensures that the force on each part of the top cover is evenly distributed during demoulding, thereby avoiding the problem of deformation of the top cover caused by uneven force. Therefore, the plastic top cover forming mold of the present invention not only improves the forming quality of the top cover, but also improves the production efficiency.

[0025] Specifically, the punch core 6 includes a bump 10 and a groove 11 disposed around the periphery of the bump 10. The groove 11 is disposed along the outer contour of the bump 10, and the bump 10 protrudes from the top surface of the groove 11. The first pinholes 8 at the four corners are all disposed on the grooves 11, and the first pinhole 8 at the center of the punch core 6 is located on the bump 10. This design, by locating the first pinholes 8 at the corners of the groove 11 and at the center of the bump 10, ensures that the ejector pins can apply force evenly during demolding, avoiding deformation of the top cover due to uneven force during demolding and improving the quality of the finished top cover.

[0026] Specifically, the bump 10 is provided with a mold hole, within which a first core column 13 is disposed. A molding gap 14 is defined between the first core column 13 and the mold hole, and the molding gap 14 is connected to the top cover molding cavity 4. The groove 11 is also provided with a second pinhole 15, which is located between the two first pinholes 8 in the groove 11 and directly opposite the first pinhole 8 in the bump 10. The first core column 13 is located between the first pinhole 8 and the second pinhole 15, and a first ejector pin is also disposed within the second pinhole 15. This design ensures that during the molding process, the molding gap 14 between the first core column 13 and the mold hole ensures uniform distribution of the plastic material. At the same time, the design of the second pinhole 15 further optimizes the layout of the ejector pins, ensuring the stability of the top cover during demolding.

[0027] Specifically, see Figure 4 The upper mold forming plate 1 is provided with a female mold core 16 that can be molded with the male mold core 6. The female mold core 16 is provided with a second core column 17 that abuts against the first core column 13. The cooperation between the female mold core 16 and the male mold core 6 ensures the sealing of the mold when it is closed, and the design of the second core column 17 abutting against the first core column 13 ensures the alignment accuracy of the mold when it is closed, further improving the molding quality of the top cover.

[0028] Specifically, see Figure 5-Figure 6 , further comprising a mold frame 18, which comprises an upper mold frame 19 and a lower mold frame 20. The upper mold frame 19 and the lower mold frame 20 are combined to form a space for placing the molding components. The upper mold frame 19 is connected to the upper mold forming plate 1, and the lower mold frame 20 is connected to the lower mold forming plate 2. The design of the mold frame 18 allows the various parts of the mold to be combined in an orderly manner, ensuring the stability and structural integrity of the mold, and facilitating production and maintenance.

[0029] Specifically, the mold frame 18 includes an upper mold frame 19 provided with a first water transport structure 21, and a lower mold frame 20 provided with a second water transport structure 22. The design of the first water transport structure 21 and the second water transport structure 22 facilitates cooling of the mold, ensuring temperature control during the molding process, and improving the molding quality and production efficiency of the top cover.

[0030] Specifically, the upper mold frame 19 is connected to the upper mold plate 23, and the upper mold plate 23 is provided with a material port 24, which is connected to the material channel 5. The material port 24 is designed for injecting plastic material. The connection between the material port 24 on the upper mold plate 23 and the material channel 5 ensures that the material can flow smoothly into the mold.

[0031] The above describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and description merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic top cover forming mold, comprising an upper mold forming plate and a lower mold forming plate, wherein the upper mold forming plate and the lower mold forming plate are superimposed on each other to form a forming assembly, wherein two top cover forming cavities are formed between the upper mold forming plate and the lower mold forming plate, wherein the upper mold forming plate is provided with a material channel, wherein the material channel is connected to the two top cover forming cavities, and the two top cover forming cavities are symmetrically distributed on both sides of the material channel, characterized in that: The lower mold forming plate is provided with a punch core, which has four vertices. The four vertices and the center of the punch core are all provided with first pinholes, and each of the first pinholes is provided with a first ejector that can move axially along the pinhole.

2. The plastic top cover forming mold according to claim 1, characterized in that: The punch core includes a convex block and a groove arranged on the periphery of the convex block, the convex block protrudes from the top surface of the groove, the first pinholes on the four top corners are all arranged on the groove, and the first pinhole on the center of the punch core is located on the convex block.

3. The plastic top cover forming mold according to claim 2, characterized in that: The convex block is provided with a mold hole, a first core column is provided in the mold hole, a molding gap is provided between the first core column and the mold hole, the groove is further provided with a second pinhole, the second pinhole is located between the two first pinholes on the groove, the second pinhole is opposite to the first pinhole on the convex block, and the first core column is located between the first pinhole and the second pinhole.

4. The plastic top cover forming mold according to claim 3, characterized in that: The upper mold forming plate is provided with a female mold core that can be molded with the male mold core, and the female mold core is provided with a second core column that abuts against the first core column.

5. The plastic top cover forming mold according to claim 4, characterized in that: It also includes a mold frame, which includes an upper mold frame and a lower mold frame. The upper mold frame is combined with the lower mold frame to form a space for placing the molding assembly. The upper mold frame is connected to the upper mold forming plate, and the lower mold frame is connected to the lower mold forming plate.

6. The plastic top cover forming mold according to claim 5, characterized in that: It also includes a mold frame, wherein the upper mold frame is provided with a first water transport structure, and the lower mold frame is provided with a second water transport structure.

7. The plastic top cover forming mold according to claim 5, characterized in that: The upper mold frame is connected to an upper mold plate, and the upper mold plate is provided with a material port, and the material port is communicated with the material channel.

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