Earphone shell injection mold with high positioning precision

Abstract

The utility model discloses an earphone shell injection mold with high positioning precision. The earphone shell injection mold comprises a top seat, an upper mold seat, a lower mold seat, a base, a mold core insert, a mold cavity insert and a core pulling assembly, a forming cavity used for injection molding of an earphone shell product is formed between the mold core insert and the mold cavity insert, the mold core insert is formed by symmetrically splicing two movable inserts, insert sliding grooves are formed in the positions, at the side ends of the movable inserts, of the bottom of the upper mold base, and the core pulling assembly is connected with the movable inserts. And the core-pulling assembly is used for driving the movable inserts to move towards each other or away from each other along the insert chutes. According to the utility model, the mold core insert is formed by symmetrically splicing the two movable inserts, and the two movable inserts can move back to back during demolding, so that the friction force and obstruction between the molded earphone shell and the mold are reduced, and smooth demolding is facilitated; and when the mold core insert is abraded, a user can independently replace the mold core insert without replacing the whole mold, so that the maintenance cost is reduced, the positioning error is convenient to correct, and the machining precision of a product is improved.

Description

Technical Field

[0001] The utility model relates to the field of earphone shell molds, in particular to an earphone shell injection mold with high positioning accuracy. Background Art

[0002] With the rapid development of electronic products and the increasing demand of consumers for high-quality audio equipment, headphones are becoming more and more popular in modern life. As an important component of headphones, the production process and efficiency of headphone shells have a direct impact on the quality and cost of headphones. In the production process of headphone shells, they need to be injection molded through molds.

[0003] In the existing technology, since the earphone shell has a complex geometric shape and fine structural details, such as internal buckles, grooves and holes, these parts require high precision of the mold. Since the core inserts inside the traditional injection mold are fixed, they are prone to wear during the high-frequency molding process. This not only easily leads to positioning errors, affects the processing accuracy of the earphone shell size, and reduces product quality, but also increases the mold downtime for maintenance, affecting production efficiency.

[0004] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an earphone shell injection mold with high positioning accuracy which is easy to maintain and improves the production efficiency of the product.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: an earphone shell injection mold with high positioning accuracy, including a top seat, an upper mold seat, a lower mold seat, a base, a core insert, a cavity insert and a core pulling assembly;

[0007] The top seat is arranged on the top of the upper mold seat, the upper mold seat is arranged on the top of the lower mold seat, the core insert is arranged on the bottom of the upper mold seat, and the cavity insert is arranged on the top of the lower mold seat. A molding chamber for injection molding an earphone shell product is formed between the core insert and the cavity insert;

[0008] The core insert is formed by symmetrically splicing two movable inserts, and an insert chute is provided at the bottom of the upper mold base at the side end of the movable insert. The core pulling assembly is connected to the movable insert, and the core pulling assembly is used to drive the movable insert to move toward or away from each other along the insert chute;

[0009] The core pulling assembly includes a slide and an inclined top guide block, the slide is located in the insert slide, the slide is connected to the side end of the movable insert, the slide is provided with a positioning inclined groove, and the inclined top guide block is provided with a positioning slider adapted to be clamped in the positioning inclined groove;

[0010] The inclined top guide block is connected to the top seat, and is used to push the slide seat to move back and forth in the insert slide groove as the top seat moves up and down.

[0011] By adopting the above technical solution, the earphone shell injection mold with high positioning accuracy also includes a core fixing seat, which is arranged at the bottom of the upper mold seat, and the bottom of the core fixing seat is provided with a positioning groove for accommodating the core insert.

[0012] By adopting the above-mentioned technical solutions, the earphone shell injection mold with high positioning accuracy further includes a pin inserting assembly, which includes an upper pull rod, a side pressure block, a pin inserting body and a spring;

[0013] A limiting bevel groove is provided at the side end of the core fixing seat, the side pressure block is arranged in the limiting bevel groove, the inserting pin body is connected to the inner side end of the side pressure block, and a guide hole is provided on the limiting bevel groove for allowing the inserting pin body to partially extend into the molding chamber;

[0014] The outer end of the side pressure block is provided with a slope structure, the bottom of the upper pull rod abuts against the slope structure, the top of the upper pull rod is connected to the top seat, and the spring is provided between the limiting inclined groove and the side pressure block, and the spring is used to apply elastic force to the side pressure block to push it outward.

[0015] By adopting the above-mentioned technical solutions, in the earphone shell injection mold with high positioning accuracy, a positioning protrusion is provided on the side wall of the positioning slide, and a positioning groove adapted to be engaged with the positioning protrusion is provided on the movable insert.

[0016] By adopting the above-mentioned technical solutions, in the earphone shell injection mold with high positioning accuracy, the core pulling assembly also includes a pressure plate, which is arranged on both sides of the insert slide groove, and the pressure plate is used to limit the slide seat from slipping out of the insert slide groove.

[0017] By adopting the above-mentioned technical solutions, the earphone shell injection mold with high positioning accuracy also includes a cavity fixing seat, which is arranged on the top of the lower mold seat, and the top of the cavity fixing seat is provided with a receiving groove for placing the cavity insert.

[0018] By adopting the above-mentioned technical solutions, the earphone shell injection mold with high positioning accuracy also includes a cooling tube assembly, and the cooling tube assembly partially extends into the cavity fixing seat, and the cooling tube assembly is used to cool the shaped injection-molded earphone shell product.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The core insert of the utility model is composed of two movable inserts symmetrically spliced together, and the movable insert can move in the insert slide groove. During demolding, the two movable inserts can move back to back to reduce the friction and obstruction between the molded earphone shell and the mold, facilitate smooth demolding, and avoid deformation or damage of the product during the demolding process; and the setting of the movable insert can also avoid the problem of concentrated wear caused by the fixed setting of the core insert, thereby extending the service life of the mold. When the core insert is worn, the user can also replace the core insert separately without replacing the entire mold, thereby reducing maintenance costs, improving production efficiency, and facilitating the correction of positioning errors and improving the processing accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the separation structure of the upper die base and the lower die base of the utility model;

[0025] Figure 3 This is a schematic diagram of the bottom installation structure of the upper die base of the utility model;

[0026] Figure 4 This is a schematic diagram of the lower die base installation structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the installation structure of the core pulling component of the utility model;

[0028] Figure 6 This is a schematic diagram of the installation structure of the pin assembly of the present utility model;

[0029] Figure 7 This is a schematic diagram of the exploded structure of the pin inserting assembly of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0033] like Figures 1 to 7 As shown, an embodiment of the utility model provides an earphone shell injection mold with high positioning accuracy, including a top seat 1, an upper mold seat 2, a lower mold seat 3, a base 4, a core insert 5, a cavity insert 6 and a core pulling assembly 7. The top seat 1 is arranged at the top of the upper mold seat 2, the upper mold seat 2 is arranged at the top of the lower mold seat 3, the core insert 5 is arranged at the bottom of the upper mold seat 2, and the cavity insert 6 is arranged at the top of the lower mold seat 3. A molding cavity for injection molding an earphone shell product is formed between the core insert 5 and the cavity insert 6; when the upper mold seat 2 and the lower mold seat 3 are combined together, the core insert 5 and the cavity insert 6 cooperate with each other to obtain a molding cavity, and the shape of the molding cavity determines the shape of the earphone shell product.

[0034] The core insert 5 is formed by symmetrically splicing two movable inserts 50. The bottom of the upper mold base 2 at the side end of the movable insert 50 is provided with an insert chute 20. The core pulling assembly 7 is connected to the movable insert 50. The core pulling assembly 7 is used to drive the movable insert 50 to move toward or away from each other along the insert chute 20. Since the core insert 5 is formed by symmetrically splicing two movable inserts 50, and the movable insert 50 can move in the insert chute 20, the two movable inserts 50 can move away from each other during demoulding to reduce the risk of the molded earphone shell and the molded earphone shell. The friction and obstruction between the molds facilitate smooth demoulding, avoid deformation or damage of the product during the demoulding process, and ensure the integrity of the product shape; and, since the movable insert 50 can move during the demoulding process, the concentrated wear problem caused by the fixed setting of the core insert 5 is avoided, thereby extending the service life of the mold; when the core insert 5 is worn, the user can replace the core insert 5 alone without replacing the entire mold, thereby reducing maintenance costs, improving production efficiency, and facilitating the correction of positioning errors, thereby improving the processing accuracy of the product.

[0035] like Figure 3 、 Figure 5 and Figure 6 As shown, the core pulling assembly 7 includes a slide 71 and an inclined top guide block 72. The slide 71 is located in the insert slot 20. The slide 71 is connected to the side end of the movable insert 50. A positioning inclined slot 710 is provided on the slide 71. The inclined top guide block 72 is provided with a positioning slider 720 that is adapted to fit the positioning inclined slot 710. The inclined top guide block 72 is connected to the top seat 1. The inclined top guide block 72 is used to push the slide 71 to move back and forth in the insert slot 20 as the top seat 1 moves up and down. After the injection molding is completed, the mold begins to open. As the top seat 1 moves upward, the inclined top guide block 72 connected to the top seat 1 also moves upward. Since the positioning slider 720 on the inclined top guide block 72 cooperates with the slide 71 through the positioning inclined groove 710, the slide 71 is pushed to move in the insert slide 20. While the slide 71 moves in the insert slide 20, it also drives the movable insert 50 connected to it to move together. Since the movable insert 50 is symmetrically spliced, the movable insert 50 moves outward in opposite directions to leave the molding chamber, which facilitates the smooth demolding of the product. At this time, the earphone shell can be smoothly taken out of the mold.

[0036] like Figure 5 and Figure 6 As shown, further, it also includes a core fixing seat 51, which is arranged at the bottom of the upper mold base 2. The bottom of the core fixing seat 51 is provided with a positioning groove 510 for accommodating the core insert 5. Such a setting can prevent the core insert 5 from causing wear to the upper mold base 2 during high-frequency movement, and facilitates the maintenance and replacement of mold accessories.

[0037] Furthermore, the positioning groove 510 and the insert groove 20 are located on the same horizontal plane. Such an arrangement can increase the moving stroke of the core insert 5, so that the core insert 5 can move from the positioning groove 510 to the insert groove 20, which is convenient for rapid demoulding.

[0038] like Figure 6 and Figure 7 As shown, further, it also includes a pin inserting assembly 8, which includes an upper pull rod 81, a side pressure block 82, a pin inserting body 83 and a spring 84. The side end of the core fixing seat 51 is provided with a limiting bevel 511, and the side pressure block 82 is arranged in the limiting bevel 511. The pin inserting body 83 is connected to the inner end of the side pressure block 82, and the limiting bevel 511 is provided with a guide hole 512 for allowing the pin inserting body 83 to partially extend into the molding chamber. The outer end of the side pressure block 82 is provided with a slope structure 820, the bottom of the upper pull rod 81 abuts against the slope structure 820, and the top of the upper pull rod 81 is connected to the top seat 1, and the spring 84 is provided between the limiting bevel 511 and the side pressure block 82, and the spring 84 is used to apply an elastic force to push the side pressure block 82 toward the outside. During the injection molding process, the pin body 83 extends into the molding chamber to form the fine structures required on the earphone shell, such as small holes, grooves, buckles, or other shapes that require precise molding. When the injection molding is completed, the mold begins to be demolded. At this time, the top seat 1 and the upper pull rod 81 connected to it begin to rise. As the top seat 1 rises, the upper pull rod 81 also detaches from the inclined structure 820 of the side pressure block 82. The detachment of the upper pull rod 81 can release the pressure on the side pressure block 82. After the upper pull rod 81 detaches, the spring 84 releases its pre-compressed elastic force, pushing the side pressure block 82 outward, thereby driving the pin body 83 outward, so that the pin body 83 gradually withdraws from the molding chamber, preventing damage to the earphone shell product or leaving defects during demolding, thereby improving the injection molding accuracy of the product.

[0039] like Figure 5 As shown, further, a positioning protrusion 513 is provided on the side wall of the positioning slide 510, and a positioning groove 501 is provided on the movable insert 50 to be adapted to be engaged with the positioning protrusion 513. Such an arrangement can prevent the movable insert 50 from being displaced or deviated during the demolding movement.

[0040] like Figure 3 As shown, further, the core pulling assembly 7 also includes a pressure plate 73, and the pressure plate 73 is arranged on both sides of the insert slide 20. The pressure plate 73 is used to limit the slide 71 from slipping out of the insert slide 20, avoiding the slide 71 from deviating in the insert slide 20 due to external force or other factors, thereby improving the product molding accuracy.

[0041] like Figure 4 As shown, further, it also includes a cavity fixing seat 61, which is arranged on the top of the lower mold base 3. The top of the cavity fixing seat 61 is provided with a receiving groove for placing the cavity insert 6. Such a setting allows the operator to easily remove the cavity insert 6 from the receiving groove and replace it when the mold needs to replace or maintain it.

[0042] like Figure 4 As shown, the mold further includes a cooling tube assembly 9, which partially extends into the mold cavity holder 61 and is used to cool the injection-molded earphone housing product. The cooling tube assembly 9 allows for circulation of coolant to quickly remove heat from the mold, thereby accelerating the cooling and shaping process of the injection-molded earphone housing product, reducing the molding cycle time for each product, and thereby improving overall production efficiency.

[0043] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An earphone shell injection mold with high positioning accuracy, characterized in that: Including top seat, upper die seat, lower die seat, base, core insert, cavity insert and core pulling assembly; The top seat is arranged on the top of the upper mold seat, the upper mold seat is arranged on the top of the lower mold seat, the core insert is arranged on the bottom of the upper mold seat, and the cavity insert is arranged on the top of the lower mold seat. A molding chamber for injection molding an earphone shell product is formed between the core insert and the cavity insert; The core insert is formed by symmetrically splicing two movable inserts, and an insert chute is provided at the bottom of the upper mold base at the side end of the movable insert. The core pulling assembly is connected to the movable insert, and the core pulling assembly is used to drive the movable insert to move toward or away from each other along the insert chute; The core pulling assembly includes a slide and an inclined top guide block, the slide is located in the insert slide, the slide is connected to the side end of the movable insert, the slide is provided with a positioning inclined groove, and the inclined top guide block is provided with a positioning slider adapted to be clamped in the positioning inclined groove; The inclined top guide block is connected to the top seat, and is used to push the slide seat to move back and forth in the insert slide groove as the top seat moves up and down.

2. The earphone shell injection mold with high positioning accuracy according to claim 1, characterized in that: It also includes a core fixing seat, which is arranged at the bottom of the upper mold seat. The bottom of the core fixing seat is provided with a positioning groove for accommodating the core insert.

3. The earphone shell injection mold with high positioning accuracy according to claim 2, characterized in that: The positioning chute and the insert chute are located on the same horizontal plane.

4. The earphone shell injection mold with high positioning accuracy according to claim 3, characterized in that: Also included is a pin inserting assembly, which includes an upper pull rod, a side pressure block, a pin inserting body, and a spring; A limiting bevel groove is provided at the side end of the core fixing seat, the side pressure block is arranged in the limiting bevel groove, the inserting pin body is connected to the inner side end of the side pressure block, and a guide hole is provided on the limiting bevel groove for allowing the inserting pin body to partially extend into the molding chamber; The outer end of the side pressure block is provided with a slope structure, the bottom of the upper pull rod abuts against the slope structure, the top of the upper pull rod is connected to the top seat, and the spring is provided between the limiting inclined groove and the side pressure block, and the spring is used to apply elastic force to the side pressure block to push it outward.

5. The earphone shell injection mold with high positioning accuracy according to claim 3, characterized in that: A positioning protrusion is provided on the side wall of the positioning slide, and a positioning groove adapted to be engaged with the positioning protrusion is provided on the movable insert.

6. The earphone shell injection mold with high positioning accuracy according to claim 1, characterized in that: The core pulling assembly also includes a pressure plate, which is arranged on both sides of the insert chute and is used to limit the slide seat from slipping out of the insert chute.

7. The earphone shell injection mold with high positioning accuracy according to claim 1, characterized in that: It also includes a cavity fixing seat, which is arranged on the top of the lower mold seat. The top of the cavity fixing seat is provided with a receiving groove for placing the cavity insert.

8. The earphone shell injection mold with high positioning accuracy according to claim 7, characterized in that: It also includes a cooling tube assembly, which partially extends into the mold cavity fixing seat and is used to cool the molded injection-molded earphone shell product.

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