A molding die for a top cover under a colloidal plastic part

Abstract

This utility model relates to an injection mold, specifically a molding mold for a top cover under a colloidal plastic part. The molding mold includes a lower mold base and an upper mold base mounted on the lower mold base. The lower mold base includes a bottom support and a lower mold core mounted above the bottom support. A molding assembly is fixed on the lower mold core. The molding assembly includes a center plate and edge plates respectively mounted at both ends of the center plate. Two symmetrically arranged extension plates are fixed on the center plate. Molding protrusions are provided on the center plate, edge plates, and extension plates. The upper mold base includes a top support and an upper mold core mounted below the top support. Multiple first molding blocks are provided on the lower end face of the upper mold core. Each first molding block contains a first molding block and a second molding block located on one side of the first molding block. This molding mold for a top cover under a colloidal plastic part ensures accurate positioning of the plastic part during molding, avoids irregular shapes, and improves the yield rate.

Description

Technical Field

[0001] This utility model relates to an injection mold, specifically a molding mold for a top cover under a colloidal plastic part. Background Technology

[0002] Plastic molding dies are tools used to process plastic products, enabling mass production by giving materials specific shapes and sizes.

[0003] Existing plastic part molding dies have complex structures and unreasonable designs. Their positioning mechanisms for the plastic parts are too simple and the modeling is too rough. Therefore, accurate positioning is not possible during the molding process of molten material, resulting in irregular shapes of the final molded plastic parts and reduced yield. Furthermore, molding dies typically only have one processing station for a single plastic part, meaning only one part can be processed at a time, leading to low production efficiency. Therefore, the inventors have improved the structure of the plastic part molding die. Utility Model Content

[0004] The purpose of this utility model is to provide a molding die for a plastic part under a top cover. This molding die has a simple structure and reasonable design, which keeps the plastic part in an accurate position during the molding process, avoids the problem of irregular shape of the plastic part after molding due to inaccurate positioning, improves the yield rate, can adapt to the processing of plastic parts with many through holes on the surface, and can mold at least two plastic parts in one operation, thus improving production efficiency and solving the problems mentioned in the above technical background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a molding die for a top cover under a colloidal plastic part, the molding die including a lower mold base and an upper mold base disposed on the lower mold base, the lower mold base including a bottom support and a lower mold core disposed above the bottom support, a molding assembly fixed on the lower mold core, the molding assembly including a center plate and edge plates respectively disposed at both ends of the center plate, two symmetrically arranged extension plates fixed on the center plate, and molding protrusions disposed on the center plate, edge plates and extension plates, the upper mold base including a top support and an upper mold core disposed below the top support. The mold core has multiple first molding blocks on its lower end face. Each first molding block contains a first molding block and a second molding block located on one side of the first molding block. Protrusions are fixed on the lower end faces of both the first and second molding blocks, and a groove is provided on the lower end face of the first molding block. A protrusion that enters the groove is provided on the product to be molded. An injection cavity is formed between the lower and upper mold cores. Molten material is injected into the injection cavity, and the molding of the plastic part under the top cover is achieved by pressing the lower mold base and the upper mold base together.

[0006] Preferably, there are two sets of molding components, and the two sets of molding components are symmetrical about the lower mold core. A lower injection tube is installed on the lower end face of the lower mold core, and multiple injection heads are provided on the lower injection tube. The multiple injection heads are respectively facing the two sets of molding components, so that the molten material can be injected into various positions on the molding components more evenly through the multiple injection heads.

[0007] Preferably, the center plate and the extension plate are provided with two rows of shaped protrusions, each row of shaped protrusions is arranged in a straight line, and the edge plate is provided with a row of shaped protrusions distributed in a straight line.

[0008] Preferably, multiple lower feed ports are fixed on the bottom support, and the multiple lower feed ports are distributed in a straight line on the bottom support. All of the multiple lower feed ports are connected to the lower injection pipe for injecting molten material into the lower injection pipe.

[0009] Preferably, four guide posts are fixed on the upper surface of the bottom support, and the four guide posts are distributed at the four corners of the bottom support.

[0010] Preferably, there are two of each of the first molding block and the second molding block. An upper injection pipe is also installed on the lower end face of the upper mold core. Multiple injection heads are provided on the upper injection pipe. The multiple injection heads are respectively directed toward the first molding block and the second molding block on both sides. The molten material is injected into the area on both sides through the upper injection pipe, so that the molten material is dispersed.

[0011] Preferably, four mounting holes are provided on the lower end face of the top support. The four mounting holes are distributed at the four corners of the top support, and the four guide pillars can run in the four mounting holes respectively, so that the upper mold base can smoothly open and close the mold.

[0012] Preferably, multiple upper glue inlets are fixed on the top support, and the multiple upper glue inlets are distributed in a straight line on the top support. The multiple upper glue inlets are connected to the upper injection pipe for injecting molten material into the upper injection pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a molding die for a plastic part under a top cover. The molding die includes a lower mold base and an upper mold base disposed on the lower mold base. The overall structure is simple and reasonably designed. The lower mold base includes a bottom support and a lower mold core disposed above the bottom support. A molding component is fixed on the lower mold core. The molding component includes a center plate and edge plates disposed at both ends of the center plate. Two symmetrically arranged extension plates are fixed on the center plate. Molding protrusions are provided on the center plate, edge plates, and extension plates. Two rows of molding protrusions are provided on the center plate and extension plates, and each row of molding protrusions is arranged in a straight line. One row of molding protrusions is provided on the edge plates. The basic position of the plastic part is determined by the center plate and the two edge plates. Then, the plastic part is positioned in multiple directions by the molding protrusions on the center plate and the edge plates. This ensures that the plastic part maintains accurate position during the molding process, avoids the problem of irregular shape of the molded plastic part due to inaccurate positioning, improves the yield rate, and is suitable for widespread use.

[0014] 2. The upper mold base of this utility model includes a top support and an upper mold core disposed below the top support. The lower end face of the upper mold core is provided with a plurality of first molding blocks. Each first molding block is fixed with a first molding block and a second molding block located on one side of the first molding block. A protrusion is fixed on the lower end face of the first molding block and the lower end face of the second molding block, and a groove is provided on the lower end face of the first molding block. A protrusion that enters the groove is provided on the product to be molded. An injection cavity is formed between the lower mold core and the upper mold core. Molten material is injected into the injection cavity, and the molding of the plastic part under the top cover is achieved by pressing the lower mold base and the upper mold base together. By using a plurality of molding protrusions in conjunction with the first molding block and the second molding block, it can adapt to the processing of plastic parts with many through holes on the surface. Moreover, the mold can mold at least two plastic parts in one operation, thereby improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present utility model; Figure 2 This is a schematic diagram of the lower mold base of this utility model; Figure 3 This utility model Figure 2 Enlarged view of A in the middle; Figure 4 This is a schematic diagram of the upper mold base of this utility model; Figure 5 This utility model Figure 4 Enlarged view of B in the middle; Figure 6 This is a schematic diagram of the product manufactured according to this utility model.

[0016] The reference numerals and names in the figure are as follows: 1. Lower mold base; 11. Bottom support; 12. Lower mold core; 13. Molding assembly; 131. Center plate; 132. Edge plate; 133. Extension plate; 134. Molding protrusion; 14. Lower injection tube; 15. Lower inlet; 16. Guide post; 2. Upper mold base; 21. Top support; 211. Mounting hole; 22. Upper mold core; 221. First molding block; 2211. Groove; 222. Second molding block; 223. Protrusion; 23. Upper injection tube; 24. Upper sprue; 3. Plastic part; 31. Hole; 4. Center protrusion; 41. First through hole; 5. Edge protrusion; 51. Second through hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0020] Please see Figure 1 One embodiment of this utility model is a molding die for a plastic part under a top cover. The molding die includes a lower mold base 1 and an upper mold base 2 disposed on the lower mold base 1.

[0021] Please see Figure 2 The lower mold base 1 includes a bottom support 11 and a lower mold core 12 disposed above the bottom support 11. A molding component 13 is fixed on the lower mold core 12. Multiple lower feed ports 15 are fixed on the bottom support 11. The multiple lower feed ports 15 are arranged in a straight line on the bottom support 11. Four guide pillars 16 are fixed on the upper end face of the bottom support 11. The four guide pillars 16 are distributed at the four corners of the bottom support 11.

[0022] Please see Figure 3 In this embodiment, two sets of molding components 13 are provided, and the two sets of molding components 13 are symmetrical about the lower mold core 12. A lower injection pipe 14 is installed on the lower end face of the lower mold core 12. Multiple lower inlets 15 are connected to the lower injection pipe 14 for injecting molten material into the lower injection pipe 14. Multiple injection heads are provided on the lower injection pipe 14, and the multiple injection heads are respectively facing the two sets of molding components 13, so as to inject the molten material into various positions on the molding components 13 relatively evenly through the multiple injection heads. The molding component 13 includes a center plate 131 and edge plates 132 respectively provided at both ends of the center plate 131. Two symmetrically arranged extension plates 133 are fixed on the center plate 131. Both the edge plate 132 and the extension plate 133 are provided with molding protrusions 134. The center plate 131 and the extension plate 133 are each provided with two rows of molding protrusions 134, and each row of molding protrusions 134 is arranged in a straight line. The edge plate 132 is provided with one row of molding protrusions 134 arranged in a straight line. The basic position of the plastic part is determined by the center plate 131 and the two edge plates 132. Then, the plastic part is positioned in multiple directions by the molding protrusions 134 provided on the center plate 131 and the edge plates 132. This ensures that the plastic part is accurately positioned during the molding process, avoids the problem of irregular shape of the molded plastic part due to inaccurate positioning, and improves the yield rate.

[0023] Please see Figure 4The upper mold base 2 includes a top support 21 and an upper mold core 22 disposed below the top support 21. The arrangement of the lower mold core 12 on the bottom support 11 and the arrangement of the upper mold core 22 on the top support 21 are both existing technologies. In addition, the working principle of the mold is also existing technology and will not be described in detail here. Multiple upper injection ports 24 are fixed on the top support 21. The multiple upper injection ports 24 are distributed in a straight line on the top support 21. Four mounting holes 211 are provided on the lower end face of the top support 21. The four mounting holes 211 are distributed at the four corners of the top support 21. The four guide pillars 16 can run in the four mounting holes 211 respectively, so that the upper mold base 2 can smoothly open and close the mold.

[0024] Please see Figure 5 The lower end face of the upper mold core 22 is provided with a plurality of first molding blocks 221. Each first molding block 221 contains a first molding block 221 and a second molding block 222 located on one side of the first molding block 221. In this embodiment, there are two of each first molding block 221 and second molding block 222. A protrusion 223 is fixed on the lower end face of both the first molding block 221 and the lower end face of the second molding block 222. A groove 2211 is provided on the lower end face of the first molding block 221. A protrusion that enters the groove 2211 is provided on the product to be molded. An injection cavity is formed between the lower mold core 12 and the upper mold core 22. Molten material is injected into the injection cavity and then passed through the lower mold base 1 and the upper mold base 2. The pressing process achieves the molding of the plastic part under the top cover. By using several molding protrusions 134 in conjunction with the first molding block 221 and the second molding block 222, it can adapt to the processing of plastic parts with many through holes on the surface. Moreover, the mold can mold at least two plastic parts in one operation, which improves the production efficiency. An upper injection pipe 23 is also installed on the lower end face of the upper mold core 22. Multiple upper injection ports 24 are connected to the upper injection pipe 23 for injecting molten material into the upper injection pipe 23. Multiple injection heads are provided on the upper injection pipe 23, and the multiple injection heads are respectively facing the first molding block 221 and the second molding block 222 on both sides. The molten material is injected into the area on both sides through the upper injection pipe 23, so that the molten material is dispersed.

[0025] Please see Figure 6 The product formed by this utility model is a plastic part 3, which is formed in the injection cavity between the lower mold core 12 and the upper mold core 22. A central protrusion 4 is provided at the center of the upper end face of the plastic part 3, and edge protrusions 5 are provided at both sides of the upper end face. Two hollow holes 31 are provided on the plastic part 3, and the two hollow holes 31 correspond to two protrusions 223 respectively. A first through hole 41 is provided through the central protrusion 4, and a second through hole 51 is provided through the edge protrusion 5. The inner diameter of the first through hole 41 is equal to the inner diameter of the second through hole 51. Both the first through hole 41 and the second through hole 51 correspond to the forming protrusion 134.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A molding die for a plastic part under a top cover, comprising a lower mold base (1) and an upper mold base (2) disposed on the lower mold base (1), characterized in that: The lower mold base (1) includes a bottom support (11) and a lower mold core (12) disposed above the bottom support (11). A forming component (13) is fixed on the lower mold core (12). The forming component (13) includes a center plate (131) and edge plates (132) respectively disposed at both ends of the center plate (131). Two symmetrically arranged extension plates (133) are fixed on the center plate (131). Forming protrusions (134) are disposed on the center plate (131), the edge plates (132), and the extension plates (133). The upper mold base ( 2) Includes a top support (21) and an upper mold core (22) disposed below the top support (21). The lower end face of the upper mold core (22) is provided with a plurality of first molding blocks (221). Each first molding block (221) is fixed with a first molding block (221) and a second molding block (222) located on one side of the first molding block (221). The lower end face of the first molding block (221) and the lower end face of the second molding block (222) are both fixed with protrusions (223), and the lower end face of the first molding block (221) is provided with a groove (2211).

2. The molding die for a colloidal plastic part under a top cover according to claim 1, characterized in that: The molding component (13) is provided in two sets, and the two sets of molding components (13) are symmetrical about the lower mold core (12). The lower end face of the lower mold core (12) is equipped with a lower injection tube (14), and the lower injection tube (14) is provided with multiple injection heads, which are respectively facing the two sets of molding components (13).

3. The molding die for a colloidal plastic part under a top cover according to claim 1, characterized in that: The center plate (131) and the extension plate (133) are each provided with two rows of shaped protrusions (134), and each row of shaped protrusions (134) is arranged in a straight line. The edge plate (132) is provided with a row of shaped protrusions (134) arranged in a straight line.

4. The forming mold for a top cover with adhesive plastic part according to claim 1, characterized in that: The bottom support (11) is fixed with a plurality of lower feed ports (15), which are arranged in a straight line on the bottom support (11).

5. The forming mold for a top cover with adhesive plastic part according to claim 1, wherein: Four guide posts (16) are fixed on the upper end face of the bottom support (11), and the four guide posts (16) are distributed at the four corners of the bottom support (11).

6. The molding die for a colloidal plastic part under a top cover according to claim 1, characterized in that: There are two of each of the first molding block (221) and the second molding block (222). The lower end face of the upper mold core (22) is also equipped with an upper injection tube (23). The upper injection tube (23) is equipped with multiple injection heads, which are respectively directed toward the first molding block (221) and the second molding block (222) on both sides.

7. The forming mold for a top cover and undermolded plastic part of claim 1, wherein: The lower end face of the top support (21) is provided with four mounting holes (211), which are distributed at the four corners of the top support (21).

8. The forming mold for a top cover and undermolded plastic part of claim 1, wherein: The top support (21) is fixed with a plurality of upper glue inlets (24), and the plurality of upper glue inlets (24) are distributed in a straight line on the top support (21).

9. The forming mold for a top cover and adhesive plastic part of claim 1, wherein: The product formed by this molding die is a plastic part (3), which is formed in the injection cavity between the lower mold core (12) and the upper mold core (22). A central protrusion (4) is provided at the center of the upper end face of the plastic part (3), and edge protrusions (5) are provided at both sides of the upper end face. Two hollow holes (31) are provided on the plastic part (3), and the two hollow holes (31) correspond to two protrusions (223) respectively. A first through hole (41) is provided through the central protrusion (4), and a second through hole (51) is provided through the edge protrusion (5). The inner diameter of the first through hole (41) is equal to the inner diameter of the second through hole (51). The first through hole (41) and the second through hole (51) are both corresponding to the molding protrusion (134).

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