Mold release structure for a multi-walled shell plastic article

Abstract

The utility model discloses a kind of mould stripping structures of porous shell plastic products, including fixed mould plate and the movable setting dynamic mould plate in fixed mould plate top surface, the fixed mould plate top surface is embedded with lower mould core, the dynamic mould plate bottom surface is embedded with upper mould core, the lower mould core one side mobile setting first dynamic mould, the lower mould core other side mobile setting has second dynamic mould, the upper mould core, lower mould core, first dynamic mould and second dynamic mould between form the cavity of injection molding with shell plastic piece, first insert that first dynamic mould is towards lower mould core one end and is movably connected with obliquely extending into shell plastic piece, second insert that second dynamic mould is towards lower mould core one end and is movably connected with obliquely extending into shell plastic piece, third insert that second dynamic mould is towards lower mould core one end and is connected with vertically extending into shell plastic piece.The utility model stripping step is less, stripping process is simple, mould concrete volume is small and compact, to reduce the manufacturing cost of mould, and maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a mold release structure for porous shell plastic products. Background Technology

[0002] Plastic shell-type products are widely used in daily life, such as the earcups of headphones. These products are usually made by injection molding, where material is injected into a mold to form the product, and then demolded after molding for easy removal. However, the structure of headphone shells is relatively complex. For example, the headphone shell has through-holes formed in multiple directions, and the formation of these through-holes depends on the fit between the through-hole inserts and the inner mold. Therefore, during demolding, the headphone shell needs to be opened in multiple directions manually or by a demolding mechanism to pull out the multiple through-hole inserts from the headphone shell in different directions, thus facilitating product removal.

[0003] However, the above demolding process is not only complicated and involves many steps, but also requires different moving mold sliding groups and other structures to be set in different directions of the mold. This will result in a larger mold volume, a more complex mold structure, higher manufacturing costs, and is also not conducive to later maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a mold demolding structure for porous shell plastic products. It has fewer demolding steps and a simple demolding process. It does not require different moving mold sliding groups or other structures in different directions of the mold. The mold is small and compact, thereby reducing the manufacturing cost of the mold and making maintenance convenient. This solves the problems of inconvenient demolding and high manufacturing cost of shell plastic product molds mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mold demolding structure for a porous shell plastic product includes a fixed template and a movable template movably disposed on the top surface of the fixed template. A lower core is embedded in the top surface of the fixed template, and an upper core is embedded in the bottom surface of the movable template. A first movable mold is movably disposed on one side of the lower core, and a second movable mold is movably disposed on the other side of the lower core. The upper core, lower core, first movable mold, and second movable mold together form a cavity for injection molding the shell plastic product. A first insert that is inclined and extends into the shell plastic product is movably connected to one end of the first movable mold facing the lower core. A second insert that is inclined and extends into the shell plastic product is movably connected to one end of the second movable mold facing the lower core. A third insert that vertically extends into the shell plastic product is connected to one end of the second movable mold facing the lower core.

[0007] Preferably, a lower punch is formed in the middle of the lower core, and an upper punch adapted to the lower punch is formed in the middle of the upper core; an installation groove is provided on one side of the lower core on the top surface of the fixed template, and a receiving groove is provided on the other side of the lower core on the top surface of the fixed template.

[0008] Preferably, the first moving mold includes a slide block and a first molding block. The slide block is movably disposed in the mounting groove. The first molding block is connected to one end of the slide block facing the lower core. One end face of the slide block has an L-shaped first right-angle groove. The first molding block has a first oblique hole penetrating both ends of its face. The first insert is L-shaped. One end of the first insert is embedded in the first right-angle groove, and the other end passes through the first oblique hole and extends obliquely into the housing plastic part.

[0009] Preferably, a first arc-shaped groove is formed on the end face of one end of the first molding block.

[0010] Preferably, the top surface of the slide block has a first sliding hole that slopes downward and extends to its bottom surface, and the moving template has a first lever that slopes downward and extends to one side of the upper core, and the first lever is movably inserted into the first sliding hole.

[0011] Preferably, the second moving mold includes a slider and a second molding block. The slider is movably disposed in the receiving groove, and the second molding block is connected to one end of the slider facing the lower core. One end face of the slider has an L-shaped second right-angle groove, and the second molding block has a second oblique hole penetrating both ends of its face. The second insert is L-shaped, with one end of the second insert embedded in the second right-angle groove and the other end extending obliquely into the housing plastic part through the second oblique hole.

[0012] Preferably, the third insert includes a mounting block and a plurality of push rods. The mounting block is embedded at one end of the second molding block, and one end of each of the plurality of push rods is connected to the mounting block, while the other end of each push rod passes through the second molding block and extends into the housing plastic part.

[0013] Preferably, a second arc-shaped groove is formed on the end face of one end of the second molding block.

[0014] Preferably, the top surface of the slider has a second sliding hole that slopes downward and extends to its bottom surface, and the moving template has a second lever that is inclinedly arranged on the side of the upper core away from the first lever, and the second lever is movably inserted into the second sliding hole.

[0015] Preferably, positioning posts are provided on the bottom wall of both the mounting groove and the receiving groove near the end of the fixed template.

[0016] Compared with the prior art, the advantages of this utility model are: only when the mold is opened, the first moving mold and the second moving mold open relative to the lower core, so that the first insert and the first insert are tilted out from the shell plastic part while the third insert is pulled out along the direction perpendicular to the outer periphery of the shell plastic part, thereby realizing the core pulling action in different directions at the same time; the demolding steps are few, the operation process is simple, there is no need to set different moving mold sliding groups or other structures in different directions of the mold, the mold volume is small and compact, thereby reducing the manufacturing cost of the mold, and when maintaining or repairing, only the first moving mold or the second moving mold needs to be replaced as a whole, or the first insert, the second insert or the third insert can be replaced separately, which is convenient for assembly and later maintenance. Attached Figure Description

[0017] Figure 1 This is a perspective view of the plastic shell part of this utility model;

[0018] Figure 2 This is a perspective view of the mold demolding structure for a porous shell plastic product according to this utility model;

[0019] Figure 3 This is a perspective view of the moving template of this utility model;

[0020] Figure 4 A perspective view of the template for this utility model;

[0021] Figure 5 An exploded view of the template for this utility model;

[0022] Figure 6 This is a perspective view of the lower core of this utility model;

[0023] Figure 7 This is an exploded view of the first moving model of this utility model;

[0024] Figure 8 This is an exploded view of the second moving model of this utility model;

[0025] Figure 9 This is a perspective view of the third insert of this utility model.

[0026] The corresponding reference numerals in the attached drawings are as follows: 1. Shell plastic part; 11. Main body; 12. Edge banding; 121. Through hole; 122. Perforation; 123. Small hole; 2. Fixed template; 21. Mounting groove; 22. Receiving groove; 23. Positioning post; 3. Moving template; 31. First lever; 32. Second lever; 4. Lower core; 41. Lower punch; 5. Upper core; 51. Upper punch; 6. First moving mold; 61. Slide block; 611. First right angle 612, First sliding hole; 613, Positioning groove; 62, First forming block; 621, First oblique hole; 622, First arc-shaped groove; 7, Second moving mold; 71, Slider; 711, Second right-angle groove; 712, Second sliding hole; 72, Second forming block; 721, Second oblique hole; 722, Second arc-shaped groove; 8, First insert; 9, Second insert; 10, Third insert; 101, Mounting block; 102, Ejector pin. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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 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 this utility model, "several" or "more than" means two or more, unless otherwise explicitly specified. In this utility model, 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 connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Please see Figure 1-9 A mold demolding structure for a porous shell plastic product includes a fixed template 2 and a movable template 3 movably disposed on the top surface of the fixed template 2. (See also...) Figure 3-5 The fixed template 2 has a lower core 4 embedded in its top surface, and the movable template 3 has an upper core 5 embedded in its bottom surface. A first movable mold 6 is movably positioned on one side of the lower core 4, and a second movable mold 7 is movably positioned on the other side of the lower core 4. The upper core 5, lower core 4, first movable mold 6, and second movable mold 7 together form a cavity for injection molding the shell plastic part 1. Please refer to [link / reference]. Figure 5 as well as Figure 7 The first moving mold 6 is movably connected to a first insert 8 that extends obliquely into the housing plastic part 1 at one end facing the lower core 4. Please refer to [link / reference]. Figure 5 as well as Figure 8 The second moving mold 7 is movably connected to a second insert 9 that extends obliquely into the housing plastic part 1 at one end facing the lower core 4, and a third insert 10 that extends vertically into the housing plastic part 1 at one end facing the lower core 4.

[0030] Please see Figure 1In this embodiment, the shell plastic part 1 includes a main body 11 and a rim 12 formed on the outer periphery of the main body 11. The rim 12 has through holes 121, perforations 122, and several small holes 123 formed at different circumferential positions. Please refer to [link / reference]. Figure 4 as well as Figure 6 The lower core 4 has a lower punch 41 formed in the middle. Please refer to [link / reference]. Figure 3 An upper punch 51, adapted to the lower punch 41, is formed in the middle of the upper core 5. The first moving mold 6, the second moving mold 7, the lower punch 41, and the upper punch 51 cooperate to form a cavity that accommodates the shell plastic part 1. Please refer to Figure 5 The first insert 8 cooperates with the lower punch 41 to injection mold the through hole 121, the second insert 9 cooperates with the lower punch 41 to injection mold the through hole 122, and the third insert 10 cooperates with the lower punch 41 to injection mold a plurality of small holes 123.

[0031] This invention only requires the first moving mold 6 and the second moving mold 7 to open relative to the lower core 4 during mold opening, so that the first insert 8 is pulled out from the shell plastic part 1 at an angle while the third insert 10 is pulled out along a direction perpendicular to the outer periphery of the shell plastic part 1, thereby simultaneously realizing the core pulling action in different directions. The demolding steps are few and the operation process is simple. There is no need to set different moving mold sliding groups or other structures in different directions of the mold. The mold volume is small and compact, thereby reducing the manufacturing cost of the mold. Moreover, during maintenance or repair, only the first moving mold 6 or the second moving mold 7 needs to be replaced as a whole, or the first insert 8, the second insert 9, or the third insert 10 can be replaced individually, which is convenient for assembly and later maintenance.

[0032] Please see Figure 5 The top surface of the template 2 has an installation groove 21 on one side of the lower core 4, and a receiving groove 22 on the other side of the top surface of the template 2. Please refer to [link / reference]. Figure 5 as well as Figure 7 The first moving mold 6 includes a slide block 61 and a first molding block 62. The slide block 61 is movably disposed in the mounting groove 21. The first molding block 62 is connected to one end of the slide block 61 facing the lower core 4. One end face of the slide block 61 has an L-shaped first right-angle groove 611. The first molding block 62 has a first oblique hole 621 penetrating both ends of its end face. The first insert 8 is L-shaped. One end of the first insert 8 is embedded in the first right-angle groove 611, and the other end passes through the first oblique hole 621 and extends obliquely into the through hole 121 of the housing plastic part 1. In this embodiment, the end face of the first molding block 62 facing the lower punch 41 forms a first arc-shaped groove 622. The first arc-shaped groove 622 cooperates with the lower punch 41 to injection mold half of the edge band 12.

[0033] Please see Figure 5After the shell plastic part 1 is injection molded, the moving template 3 moves upward relative to the fixed template 2 to open the mold; during the mold opening process, the slide 61 and the first molding block 62 move away from the shell plastic part 1, thereby driving the first insert 8 to be tilted out from the through hole 121 of the shell plastic part 1, thereby completing the demolding.

[0034] Please see Figure 5 as well as Figure 8 The second moving mold 7 includes a slider 71 and a second molding block 72. The slider 71 is movably disposed in the receiving groove 22. The second molding block 72 is connected to the end of the slider 71 facing the lower core 4. One end face of the slider 71 has an L-shaped second right-angle groove 711. The second molding block 72 has a second oblique hole 721 penetrating both ends of its end face. The second insert 9 is L-shaped. One end of the second insert 9 is embedded in the second right-angle groove 711, and the other end passes through the second oblique hole 721 and extends obliquely into the through hole 122 of the shell plastic part 1. The third insert 10 includes a mounting block 101 and a plurality of ejector rods 102. The mounting block 101 is embedded in one end of the second molding block 72. One end of each of the plurality of ejector rods 102 is connected to the mounting block 101, and the other end passes through the second molding block 72 and extends into the small hole 123 of the shell plastic part 1. In this embodiment, a second arc-shaped groove 722 is formed on the end face of the second molding block 72 facing the lower punch 41, and the second arc-shaped groove 722 cooperates with the lower punch 41 to injection mold the other half of the edge banding 12.

[0035] Please see Figure 5 During the mold opening process, the slider 71 and the second molding block 72 move away from the shell plastic part 1, thereby causing the second insert 9 to be tilted out of the through hole 121 of the shell plastic part 1, while simultaneously causing the ejector rod 102 of the third insert 10 to be straight out of the small hole 123 of the shell plastic part 1, thus completing the demolding.

[0036] Please refer to Figure 5 The top surface of the slide 61 has a first sliding hole 612 that slopes downward and extends to its bottom surface. Please refer to [link / reference]. Figure 3 The moving template 3 is provided with a first lever 31 extending downward at an incline on one side of the upper core 5. The first lever 31 is movably inserted into the first sliding hole 612. The top surface of the slider 71 is provided with a second sliding hole 712 that extends downward at an incline and penetrates to its bottom surface. The moving template 3 is provided with a second lever 32 at an incline on the side of the upper core 5 away from the first lever 31. The second lever 32 is movably inserted into the second sliding hole 712.

[0037] When the mold is opened, the first lever 31 presses the inner wall of the first sliding hole 612 with its bottom end as it rises, thereby causing the slide block 61 and the first molding block 62 to move horizontally to the right; the second lever 32 presses the inner wall of the second sliding hole 712 with its bottom end as it rises, thereby causing the slider 71 and the second molding block 72 to move horizontally to the left, thereby quickly completing the demolding.

[0038] Please see Figure 5 Positioning posts 23 are provided on the bottom walls of both the mounting groove 21 and the receiving groove 22 near the end of the fixed template 2. Positioning grooves 613 for the positioning posts 23 to abut on the lower sides of both the slide block 61 and the slider 71 are provided. In this embodiment, there are four positioning posts 23, respectively arranged opposite each other on both sides of the mounting groove 21 and the receiving groove 22. The number of positioning grooves 613 is the same as the number of positioning posts 23. The function of the positioning posts 23 is to limit the extreme movement distance of the slide block 61 and the slider 71, thus serving as a limiting device.

[0039] The working principle of the mold demolding structure for a porous shell plastic product of this utility model is as follows: During the process of the moving template 3 moving upward relative to the fixed template 2 to open the mold, the first lever 31 presses the inner wall of the first sliding hole 612 through its bottom end, causing the slide block 61 and the first molding block 62 to move horizontally to the right, thereby opening one side of the shell plastic part 1, and the first insert 8 is pulled out from the through hole 121 of the shell plastic part 1; at the same time, the second lever 32 presses the inner wall of the second sliding hole 712 through its bottom end, causing the slider 71 and the second molding block 72 to move horizontally to the left, thereby opening the other side of the shell plastic part 1, and the second insert 9 is pulled out at an angle from the through hole 121 of the shell plastic part 1, and the push rod 102 of the third insert 10 is pulled out straight from the small hole 123 of the shell plastic part 1, thereby completing the demolding process.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold demolding structure for a porous shell plastic product, comprising a fixed template (2) and a movable template (3) movably disposed on the top surface of the fixed template (2), wherein a lower core (4) is embedded on the top surface of the fixed template (2) and an upper core (5) is embedded on the bottom surface of the movable template (3), characterized in that: The lower core (4) is movably provided with a first moving mold (6) on one side and a second moving mold (7) on the other side. The upper core (5), lower core (4), first moving mold (6) and second moving mold (7) form a cavity for injection molding of a shell plastic part (1). The first moving mold (6) is movably connected to a first insert (8) that extends into the shell plastic part (1) at one end facing the lower core (4). The second moving mold (7) is movably connected to a second insert (9) that extends into the shell plastic part (1) at one end facing the lower core (4). The second moving mold (7) is connected to a third insert (10) that extends vertically into the shell plastic part (1) at one end facing the lower core (4).

2. The mold demolding structure for porous shell plastic products according to claim 1, characterized in that: The lower core (4) has a lower punch (41) in the middle, and the upper core (5) has an upper punch (51) adapted to the lower punch (41) in the middle; the top surface of the fixed template (2) has an installation groove (21) on one side of the lower core (4), and the top surface of the fixed template (2) has an accommodating groove (22) on the other side of the lower core (4).

3. The mold demolding structure for porous shell plastic products according to claim 2, characterized in that: The first moving mold (6) includes a slide (61) and a first molding block (62). The slide (61) is movably disposed in the mounting groove (21). The first molding block (62) is connected to one end of the slide (61) facing the lower core (4). One end face of the slide (61) is provided with a first right-angle groove (611) in the shape of an L. The first molding block (62) is provided with a first oblique hole (621) penetrating both ends of its face. The first insert (8) is L-shaped. One end of the first insert (8) is embedded in the first right-angle groove (611), and the other end passes through the first oblique hole (621) and extends obliquely into the housing plastic part (1).

4. The mold demolding structure for porous shell plastic products according to claim 3, characterized in that: A first arc-shaped groove (622) is formed on the end face of one end of the first molding block (62).

5. The mold demolding structure for porous shell plastic products according to claim 3, characterized in that: The top surface of the slide block (61) is provided with a first sliding hole (612) that is inclined downward and extends through to its bottom surface. The moving template (3) is provided with a first lever (31) that extends downward on one side of the upper core (5). The first lever (31) is movably inserted into the first sliding hole (612).

6. The mold demolding structure for porous shell plastic products according to claim 5, characterized in that: The second moving mold (7) includes a slider (71) and a second molding block (72). The slider (71) is movably disposed in the receiving groove (22). The second molding block (72) is connected to one end of the slider (71) facing the lower core (4). One end face of the slider (71) is provided with a second right-angle groove (711) in the shape of an L. The second molding block (72) is provided with a second oblique hole (721) penetrating both ends of its end face. The second insert (9) is L-shaped. One end of the second insert (9) is embedded in the second right-angle groove (711), and the other end passes through the second oblique hole (721) and extends obliquely into the shell plastic part (1).

7. The mold demolding structure for porous shell plastic products according to claim 6, characterized in that: The third insert (10) includes a mounting block (101) and a plurality of push rods (102). The mounting block (101) is embedded at one end of the second molding block (72). One end of each of the plurality of push rods (102) is connected to the mounting block (101), and the other end of each push rod passes through the second molding block (72) and extends into the housing plastic part (1).

8. The mold demolding structure for porous shell plastic products according to claim 7, characterized in that: A second arc-shaped groove (722) is formed on the end face of one end of the second molding block (72).

9. The mold demolding structure for porous shell plastic products according to claim 7, characterized in that: The top surface of the slider (71) is provided with a second sliding hole (712) that is inclined downward and extends to the bottom surface. The moving template (3) is provided with a second lever (32) on the side of the upper core (5) away from the first lever (31). The second lever (32) is movably inserted into the second sliding hole (712).

10. The mold demolding structure for porous shell plastic products according to any one of claims 2-9, characterized in that: Positioning posts (23) are provided on the bottom wall of the mounting groove (21) and the receiving groove (22) near the end of the fixed template (2).

Images