Loudspeaker shell injection mold with secondary ejector pin demolding structure

Abstract

The loudspeaker shell injection mold with the secondary ejector pin demolding structure comprises an upper mold and a lower mold, an ejector pin assembly comprises a sliding groove formed in the middle of the lower mold, a sliding ejector plate set is arranged in the sliding groove and comprises a first ejector plate and a second ejector plate, a plurality of mounting holes are formed in the first ejector plate, and the second ejector plate is arranged in the second ejector plate. A plurality of first grooves are formed in the upper end of the second ejector plate, through holes corresponding to the first grooves are formed in the first ejector plate, first springs are arranged in the first grooves, the other ends of the first springs are connected with second ejector pins penetrating through the through holes, and the first ejector pins and the second ejector pins penetrate through the lower mold. The first ejector pin and the second ejector pin jack the loudspeaker shell for the first time, the second ejector pin compresses the first spring, when the loudspeaker shell is separated from the lower mold, the first spring rebounds to enable the second ejector pin to jack the loudspeaker shell again, and through the arrangement of the ejector pin assembly, the loudspeaker shell is completely demolded.

Description

Technical Field

[0001] The utility model relates to an injection mold for a speaker housing with a secondary ejector pin demolding structure, and is applied to the field of mold manufacturing. Background Technique

[0002] The injection mold for a speaker housing is a special injection mold for manufacturing a speaker housing, and it plays an important role in the production of plastic products. The design and manufacturing quality of this mold directly affect the product quality, production efficiency and cost control of the speaker housing. When designing an injection mold for a speaker housing, multiple aspects need to be considered, including the basic structure and working principle of the mold. A complete set of injection mold for a speaker housing usually consists of a mold base, a mold plate, a gate system, an injection system, a clamping system, a cooling system and an exhaust system, etc. Its working principle is to heat and melt the plastic raw material in the injection cylinder, and then enter the mold cavity through the nozzle. Under the action of the clamping system, it maintains a certain pressure and temperature, so that the plastic is cooled and formed. Finally, the finished product is ejected from the mold through the ejection mechanism to complete the entire injection process.

[0003] The existing injection mold for a speaker has an ejector pin structure, but generally only has a single ejector pin. Some speaker mounting housings are strip-shaped, so it is difficult for a single ejector pin to completely separate the speaker mounting housing from the mold core. If rapid demolding is carried out, it may cause deformation of the speaker housing. Therefore, in view of the above problems, the utility model designs an injection mold for a speaker housing with a secondary ejector pin demolding structure. Summary of the Utility Model

[0004] The utility model provides an injection mold for a speaker housing with a secondary ejector pin demolding structure, which can effectively solve the above problems.

[0005] The utility model is realized as follows:

[0006] An injection mold for a speaker housing with a secondary ejector pin demolding structure, comprising:

[0007] A housing mold, including an upper mold and a lower mold corresponding to the upper mold. A plurality of injection cavities are arranged between the upper mold and the lower mold, and a speaker housing is arranged in the injection cavities;

[0008] The thimble assembly includes a sliding groove disposed in the middle of the lower mold and penetrating in its width direction. A top plate group that can slide up and down is disposed in the sliding groove. The top plate group includes a first top plate and a second top plate connected to the first top plate. A plurality of mounting holes are provided on the first top plate, and first thimbles are disposed in the mounting holes. A plurality of first grooves are provided at the upper end of the second top plate. The first top plate is provided with through holes corresponding to the first grooves. A first spring is disposed in the first groove, and the other end of the first spring is connected to a second thimble passing through the through hole. The first thimble and the second thimble penetrate the lower mold and communicate with the injection cavity.

[0009] When demolding is required, the first thimble and the second thimble abut against the lower end surface of the speaker housing. The upper mold is removed, so that the top plate group slides upward. The first thimble and the second thimble initially lift the speaker housing upward. The second thimble compresses the first spring. When the speaker housing is separated from the lower mold, the first spring rebounds, causing the second thimble to lift the speaker housing again.

[0010] As a further improvement, the upper mold includes a first housing. An injection port is provided at the top of the first housing. An upper mold core is installed in the first housing. A second groove is provided in the upper mold core. The lower mold includes a second housing. A lower mold core is provided in the second housing. The lower mold core is provided with an injection portion corresponding to the second groove. When the upper mold and the lower mold are clamped together, the second groove and the injection portion are clamped to form an injection cavity.

[0011] As a further improvement, a receiving cavity is provided on the lower mold core. An injection block is disposed in the receiving cavity. A circle of steps is provided on the outer periphery of the upper end surface of the injection block, so that an undercut is formed on the speaker housing. The second thimble abuts against the lower end surface of the injection block.

[0012] As a further improvement, a plurality of sliding shafts are vertically disposed in the sliding groove. A second spring is sleeved on the sliding shaft, and the lower end of the second spring abuts against the first top plate.

[0013] As a further improvement, the rigidity limit of the first spring is 3 - 4 N / cm, and the rigidity limit of the second spring is 5 - 8 N / cm.

[0014] As a further improvement, a plurality of positioning columns are provided on the upper end surface of the lower mold. The upper mold is provided with positioning holes corresponding to the positioning columns, and the positioning columns are disposed in the positioning holes.

[0015] The beneficial effect of the utility model is that when demolding is required, the first ejector pin and the second ejector pin are pressed against the lower end surface of the speaker housing, the upper mold is taken out, the ejector plate group slides upward, the first ejector pin and the second ejector pin initially lift the speaker housing upward, so that the speaker housing is initially separated from the lower mold, the second ejector pin compresses the first spring, and when the speaker housing is initially separated from the lower mold, the first spring rebounds, so that the second ejector pin lifts the speaker housing again, so that the speaker housing is completely separated from the upper mold. Through the arrangement of the ejector pin assembly, the first ejector pin and the second ejector pin first slowly eject the speaker housing to prevent deformation of the speaker housing due to rapid ejection. Since slow ejection may make the speaker housing unable to be completely demolded, the second ejector pin is used to eject the speaker housing again, so that the speaker housing is more convenient to demold, and it can be ensured that the speaker housing is not deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram provided by an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of a top view structure provided by an embodiment of the utility model.

[0019] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0020] Figure 4 It is a schematic diagram of the hidden first shell structure provided by an embodiment of the utility model.

[0021] The accompanying drawings are marked as follows:

[0022] 10. Shell mold; 11. Upper mold; 111. First shell; 1111. Injection port; 112. Upper mold core; 1121. Second groove; 12. Lower mold; 121. Second shell; 122. Lower mold core; 1221. Injection part; 1222. Accommodation cavity; 123. Positioning column; 13. Injection block; 131. Step;

[0023] 20. Thimble assembly; 21. Sliding groove; 22. Top plate group; 221. First top plate; 2211. Mounting hole; 2212. Through hole; 222. Second top plate; 2221. First groove; 23. First thimble; 24. First spring; 25. Second thimble; 26. Sliding shaft; 27. Second spring;

[0024] 30. Speaker housing. Detailed implementation mode

[0025] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0026] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0027] Refer to Figures 1 to 4 As shown, an injection mold for a speaker housing 30 with a secondary thimble demolding structure includes: a housing mold 10, including an upper mold 11 and a lower mold 12 corresponding to the upper mold 11. The upper mold 11 includes a first housing 111. An injection port 1111 is provided at the top of the first housing 111. An upper mold core 112 is installed in the first housing 111. A number of second grooves 1121 are provided in the upper mold core 112. In this embodiment, the number of the second grooves 1121 is 2. The lower mold 12 includes a second housing 121. A lower mold core 122 is provided in the second housing 121. An injection part 1221 corresponding to the second groove 1121 is provided on the lower mold core 122. When the upper mold 11 and the lower mold 12 are buckled, the second groove 1121 and the injection part 1221 are buckled to form an injection cavity. An injection cavity is provided between the upper mold 11 and the lower mold 12. The speaker housing 30 is provided in the injection cavity;

[0028] Refer to Figures 3 to 4As shown in the figure, the ejector pin assembly 20 includes a sliding groove 21 provided in the middle of the lower die 12 and penetrating along its width direction. A top plate group 22 that can slide up and down is provided in the sliding groove 21. The top plate group 22 includes a first top plate 221 and a second top plate 222 connected to the first top plate 221. A plurality of mounting holes 2211 are provided on the first top plate 221, and a first ejector pin 23 is provided in the mounting holes 2211. A plurality of first grooves 2221 are provided at the upper end of the second top plate 222. The first top plate 221 is provided with through holes 2212 corresponding to the first grooves 2221. A first spring 24 is provided in the first grooves 2221, and the other end of the first spring 24 is connected to a second ejector pin 25 passing through the through holes 2212. The first ejector pin 23 and the second ejector pin 25 penetrate the lower die 12 and communicate with the injection cavity;

[0029] Since the speaker housing 30 manufactured by this mold is a long strip-shaped housing, when demolding, it is difficult to demold the speaker housing 30 at one time using ordinary ejector pins. If demolding is too fast, the speaker housing 30 may be deformed. Therefore, the ejector pin assembly 20 of the present invention is designed.

[0030] The working principle of the present invention is as follows: When demolding is required, the first ejector pin 23 and the second ejector pin 25 abut against the lower surface of the speaker housing 30. The upper die 11 is removed, and the top plate group 22 slides upward. The first ejector pin 23 and the second ejector pin 25 initially lift the speaker housing 30 upward, so that the speaker housing 30 is initially separated from the lower die 12. The second ejector pin 25 compresses the first spring 24. When the speaker housing 30 is separated from the lower die 12, the first spring 24 rebounds, causing the second ejector pin 25 to lift the speaker housing 30 again, so that the speaker housing 30 is completely separated from the upper die. Through the setting of this ejector pin assembly 20, first, the first ejector pin 23 and the second ejector pin 25 slowly push the speaker housing 30 out initially to prevent the speaker housing 30 from being deformed due to rapid ejection. Since slow ejection may cause the speaker housing 30 to not be completely demolded, therefore, the second ejector pin 25 pushes the speaker housing 30 out again, making the demolding of the speaker housing 30 more convenient and ensuring that the speaker housing is not deformed.

[0031] Refer to Figure 3As shown, the lower mold core 122 is provided with a accommodating cavity 1222, and an injection block 13 is provided in the accommodating cavity 1222. The outer periphery of the upper end surface of the injection block 13 is provided with a circle of steps 131, so that the speaker housing 30 forms an undercut, and the undercut is used to install the speaker. Since the undercut is prone to deformation during the injection molding process, the second ejector 25 is used to abut the lower end surface of the injection block 13. When demolding, the second ejector 25 pushes the undercut of the speaker housing 30 upward, so that the speaker housing 30 can be demolded smoothly, thereby preventing the speaker housing 30 from being deformed and making it impossible to install the speaker.

[0032] Reference Figure 3 As shown, a plurality of sliding shafts 26 are vertically arranged in the sliding groove 21, and a second spring 27 is sleeved on the sliding shaft 26, and the lower end of the second spring 27 abuts the first top plate 221. The rigidity limit of the first spring 24 is 3-4N / cm, and the rigidity limit of the second spring is 5-8N / cm. In this embodiment, the rigidity limit of the first spring 24 is 3N / cm, and the rigidity limit of the second spring is 5N / cm. When the second spring 27 is compressed to make the first ejector 23 and the second ejector 25 push the speaker housing 30 upward, the first spring 24 can be compressed, and when the first ejector 23 and the second ejector 25 initially push the speaker housing 30 out, the first spring 24 can rebound and push the speaker housing 30 again, and the first spring 24 will not quickly push the second ejector 25 out, causing the speaker housing 30 to deform.

[0033] Reference Figure 4 As shown, the upper end surface of the lower mold 12 is provided with a plurality of positioning posts 123, and the upper mold 11 is provided with positioning holes corresponding to the positioning posts 123. The positioning posts 123 are arranged in the positioning holes, so that the upper mold 11 can be more stably pulled out when the upper mold 11 and the lower mold 12 are separated.

[0034] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A loudspeaker housing injection mold with a secondary ejector demoulding structure, characterized in that: include: A housing mold (10) comprises an upper mold (11) and a lower mold (12) corresponding to the upper mold (11), a plurality of injection molding cavities are arranged between the upper mold (11) and the lower mold (12), and a speaker housing (30) is arranged in the injection molding cavity; The ejector pin assembly (20) comprises a sliding groove (21) arranged in the middle of the lower mold (12) and extending along the width direction thereof, a top plate group (22) which can slide up and down is arranged in the sliding groove (21), the top plate group (22) comprises a first top plate (221) and a second top plate (222) connected to the first top plate (221), the first top plate (221) is provided with a plurality of mounting holes (2211), a first ejector pin (23) is arranged in the mounting hole (2211), and a second ejector pin (23) is arranged in the second top plate (222) connected to the first top plate (221). A plurality of first grooves (2221) are arranged at the upper ends of the second top plates (222); the first top plates (221) are provided with through holes (2212) corresponding to the first grooves (2221); a first spring (24) is arranged in the first groove (2221); the other end of the first spring (24) is connected to a second ejector pin (25) penetrating the through hole (2212); the first ejector pin (23) and the second ejector pin (25) penetrate the lower mold (12) and are connected to the injection molding cavity; When demoulding is required, the first ejector pin (23) and the second ejector pin (25) are pressed against the lower end surface of the speaker housing (30), the upper mold (11) is removed, and the ejector plate group (22) is slid upward, the first ejector pin (23) and the second ejector pin (25) initially lift the speaker housing (30) upward, the second ejector pin (25) compresses the first spring (24), and when the speaker housing (30) is separated from the lower mold (12), the first spring (24) rebounds, so that the second ejector pin (25) lifts the speaker housing (30) again.

2. The loudspeaker housing injection mold with a secondary ejector demoulding structure according to claim 1, characterized in that: The upper mold (11) comprises a first shell (111), the top of the first shell (111) is provided with an injection port (1111), an upper mold core (112) is installed in the first shell (111), a second groove (1121) is provided in the upper mold core (112), the lower mold (12) comprises a second shell (121), a lower mold core (122) is provided in the second shell (121), the lower mold core (122) is provided with an injection portion (1221) corresponding to the second groove (1121), and when the upper mold (11) is engaged with the lower mold (12), the second groove (1121) and the injection portion (1221) are engaged to form an injection cavity.

3. The loudspeaker housing injection mold with a secondary ejector demoulding structure according to claim 2, characterized in that: The lower mold core (122) is provided with a receiving cavity (1222), an injection molding block (13) is provided in the receiving cavity (1222), and a circle of steps (131) is provided on the outer periphery of the upper end surface of the injection molding block (13), so that the speaker housing (30) forms an undercut, and the second ejector pin (25) abuts against the lower end surface of the injection molding block (13).

4. The loudspeaker housing injection mold with a secondary ejector demoulding structure according to claim 1, characterized in that: A plurality of sliding shafts (26) are vertically arranged in the sliding groove (21), a second spring (27) is sleeved on the sliding shaft, and the lower end of the second spring (27) abuts against the first top plate (221).

5. The loudspeaker housing injection mold with a secondary ejector demoulding structure according to claim 4, characterized in that: The rigidity limit of the first spring (24) is 3 to 4 N / cm, and the rigidity limit of the second spring is 5 to 8 N / cm.

6. The loudspeaker housing injection mold with a secondary ejector demoulding structure according to claim 1, characterized in that: The upper end surface of the lower mold (12) is provided with a plurality of positioning columns (123), the upper mold (11) is provided with positioning holes corresponding to the positioning columns (123), and the positioning columns (123) are arranged in the positioning holes.

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