Earphone shell injection mold and injection molding machine

Abstract

The utility model relates to the technical field of injection molds, in particular to an earphone shell injection mold and an injection molding machine. The earphone shell injection mold comprises a first mold, a second mold and a core pulling module, and the first mold and the second mold can be closed together; the core-pulling module comprises a slide seat, a first core-pulling needle, a first pitched roof, a shifting block and a spring; the first core-pulling needle and the first pitched roof are arranged on the slide seat; the first pitched roof obliquely penetrates through the first core-pulling needle; the spring is arranged on the first pitched roof; the shifting block is arranged on the first mold; the slide seat is arranged on the second die in a sliding mode, and the inclined shifting rod on the shifting block can be inserted into the first hole in the slide seat. When the mold is opened, the shifting block drives the slide seat to move towards the outer side, the first core-pulling needle is firstly pulled away from the tunnel hole, the spring pushes the first pitched roof, and when the first core-pulling needle retreats by a certain distance, the first core-pulling needle and the first pitched roof continue to be pulled away from the tunnel hole together to realize demolding, so that the demolding structure is simpler, the working efficiency is higher, and the mold cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an earphone shell injection mold and an injection molding machine. Background Art

[0002] Headphone earmuffs typically consist of a headphone shell and other components, including a speaker housed within it. The headphone shell typically features a tunnel with holes in the sidewalls for installation and connection. After the headphone shell is molded and cooled, the core-pulling pins must be removed from the tunnel. Some molds use a step-by-step core-pulling process for demolding, which complicates the structure and increases mold cost.

[0003] For example, Chinese patent application number: CN201621495126.1 discloses a centripetal shrinkage and step-by-step core-pulling and demoulding device for an injection mold. Specifically disclosed is "a centripetal shrinkage and step-by-step core-pulling and demoulding device for an injection mold, comprising a core-pulling group, a cavity slider, a bearing slider, a base block, and an oil cylinder, characterized in that: the core-pulling group is composed of a straight core, an A oblique core, a B oblique core, and a C oblique core, wherein the straight core is a block-shaped steel component with a truncated cone on the left and a rectangular on the right, surrounding the center line of the straight core, a core for straight pulling and demoulding corresponding to the inverted shape of the product in the tube is provided at the left end thereof, which is called a straight core, and three oblique slide grooves are provided adjacent to the straight core, which respectively cooperate with the A oblique core, the B oblique core, and the C oblique core for inclined centripetal sliding." This structure is too complicated, which will lead to an increase in mold costs.

[0004] Another example is a two-stage core-pulling strong demoulding mechanism with a slider disclosed in Chinese patent application number CN201720396426.2, which also uses a distributed core-pulling demoulding method. Its structure is complex, which will lead to increased mold costs. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an earphone shell injection mold with synchronous core pulling, simple structure, and lower mold cost, thereby overcoming the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The present application provides an earphone shell injection mold, comprising a first mold, a second mold, and a core-pulling mold assembly, wherein the first mold and the second mold can be closed together;

[0008] The core pulling module includes a sliding seat, a first core pulling needle, a first inclined top, a shift block, and a spring. The first core pulling needle and the first inclined top are arranged on the sliding seat; the first inclined top obliquely penetrates the first core pulling needle; the spring is arranged on the first inclined top and can push the first inclined top to move on the first core pulling needle;

[0009] The shift block is arranged in the first mold; the slider seat is slidably arranged in the second mold, and the oblique shift rod on the shift block can be inserted into the first hole on the slider seat.

[0010] Preferably, the first mold includes a first template and a first mold core provided on the first template, the first mold core is provided with a cavity, and the shift block is provided on the first template;

[0011] The second mold includes a second template and a second mold core arranged on the second template. The second mold core is provided with a core, and the slide seat is slidably arranged on the second template.

[0012] Preferably, a slide insert is provided on the slide seat; the first end of the first core-pulling needle is fixed in the first mounting hole of the slide insert; the first end of the first inclined top is passed through the second mounting hole of the slide insert, and the spring pushes the first inclined top in the second mounting hole.

[0013] Preferably, an installation notch is provided on the outer wall of the first core-pulling needle; the latch penetrates the slide insert and is stuck in the installation notch.

[0014] Preferably, a first insert is provided on the slide insert, and the first insert can move toward the core.

[0015] Preferably, the second end of the first inclined top is exposed at the first core-pulling needle; and a groove is formed between the first inclined top and the second end of the first core-pulling needle.

[0016] Preferably, the first template is provided with two first mold cores, and the second template is provided with two second mold cores.

[0017] Preferably, the first mold is provided with a guide post, the second mold is provided with a guide post hole, and the guide post can be inserted into the guide post hole; the second mold plate is provided with a slide groove, and the sliding seat can slide in the slide groove.

[0018] The present application provides an injection molding machine, comprising the earphone shell injection mold, which is arranged on a machine platform.

[0019] Compared with the prior art, the present invention offers significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the first core-pulling pin and the first beveled ejector are disposed on the slider seat; the first beveled ejector obliquely penetrates the first core-pulling pin; and a spring is disposed on the first beveled ejector to push the first beveled ejector to move within the first core-pulling pin. Therefore, when the mold is opened, the beveled lever on the shift block withdraws from the first hole in the slider seat, causing the slider seat to move outward. At this point, the first core-pulling pin is first withdrawn from the tunnel hole (the first beveled ejector moves horizontally), and the spring pushes the first beveled ejector. When the first core-pulling pin has withdrawn a certain distance, the first core-pulling pin and the first beveled ejector continue to withdraw from the tunnel hole together, achieving demolding. The spring allows the first core-pulling pin and the first beveled ejector to return to their original position. This demolding structure is therefore simpler, more efficient, and reduces mold costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of mold opening of an embodiment of the present utility model.

[0021] Figure 2 This is an embodiment of the present invention Figure 1 Schematic diagram from another angle.

[0022] Figure 3 It is a partial structural decomposition diagram of an embodiment of the present utility model.

[0023] Figure 4 This is an embodiment of the present invention Figure 3 Schematic diagram from another angle.

[0024] Figure 5 Schematic diagram of an earphone shell according to an embodiment of the present invention.

[0025] Description of the accompanying drawings:

[0026] 10. First mold; 11. First template; 12. First mold core; 13. Gate plate; 14. Injection port; 15. Cavity; 20. Second mold; 21. Second template; 22. Second mold core; 23. Guide post hole; 24. Core; 30. Core-pulling module; 31. Slide seat; 32. Slide insert; 33. First core-pulling needle; 34. Mounting notch; 35. Latch; 36. First inclined top; 37. Spring; 38. First hole; 310. First insert; 311. Groove; 312. Shift block; 313. Inclined shift rod; 40. Earphone shell. DETAILED DESCRIPTION

[0027] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0028] Please refer to Figures 1 to 5 As shown, it shows the specific structure of the preferred embodiment of the present invention, which is an earphone shell injection mold.

[0029] The first core-pulling needle 33 and the first bevel 36 are mounted on the slider seat 31; the first bevel 36 extends diagonally through the first core-pulling needle 33; and a spring 37 is mounted on the first bevel 36. During demolding, the slider seat 31 moves outward, and the first core-pulling needle 33 is first withdrawn from the tunnel hole. Because the spring 37 pushes the first bevel 36, when the first core-pulling needle 33 withdraws a certain distance, the first core-pulling needle 33 and the first bevel 36 continue to withdraw from the tunnel hole, completing demolding. This demolding structure and procedure are simple, efficient, and provide more stable production efficiency.

[0030] The present application provides an injection mold for an earphone case 40, comprising a first mold 10, a second mold 20, and a core pulling module 30. The first mold 10 and the second mold 20 can be closed together. The core pulling module 30 includes a slider 31, a first core pulling pin 33, a first inclined ejector 36, a shift block 312, and a spring 37. The first core pulling pin 33 and the first inclined ejector 36 are disposed on the slider 31. The first inclined ejector 36 obliquely penetrates the first core pulling pin 33. A spring 37 is disposed on the first inclined ejector 36 and can push the first inclined ejector 36 to move within the first core pulling pin 33. The shift block 312 is disposed on the first mold 10. The slider 31 is slidably disposed on the second mold 20. The inclined shift rod 313 on the shift block 312 can be inserted into a first hole 38 on the slider 31. The spring 37 has a return function. The first core pulling pin 33 and the first inclined ejector 36 are assembled together. After the first mold 10 and the second mold 20 are closed, the injection molding material is injected from the injection port 14 into the mold cavity 15. When the mold is opened, the inclined lever 313 on the shift block 312 shifts the slider seat 31, so that the slider seat 31 is away from the cavity 15. At this time, the first core-pulling needle 33 will retreat a distance, and then the first core-pulling needle 33 and the first inclined top 36 will continue to move backward synchronously, so that the first core-pulling needle 33 and the first inclined top 36 can be smoothly pulled out of the tunnel hole. Then, the spring 37 resets the first core-pulling needle 33. Therefore, the structure of the entire core-pulling module 30 is very simple, the operation is stable, the efficiency is high, and the mold cost is also lower. When the mold is closed, the inclined lever 313 on the shift block 312 is inserted into the first hole 38 on the slider seat 31, and the slider seat 31 drives the first core-pulling needle 33 and the first inclined top 36 to insert into the core 24, which is also very simple.

[0031] Preferably, the first mold 10 includes a first template 11 and a first mold core 12 provided on the first template 11, a cavity 15 is provided on the first mold core 12, and the shift block 312 is provided on the first template 11; the second mold 20 includes a second template 21 and a second mold core 22 provided on the second template 21, a core 24 is provided on the second mold core 22, and a slider seat 31 is slidably provided on the second template 21. When the mold is closed, the first template 11 and the second template 21 are closed, the first mold core 12 and the second mold core 22 are closed, a sprue plate 13 is provided on the first template 11, and the injection molding material is injected into the cavity 15 from the injection port 14 on the sprue plate 13. The injection molding material is molded in the cavity 15. The movement trajectory of the slider seat 31 is limited by the limit seats on both sides, and the slider seat 31 slides in the channel formed between the two limit seats.

[0032] Preferably, the slider seat 31 is provided with a slider insert 32; the first end of a first core puller 33 is fixed in a first mounting hole of the slider insert 32; the first end of a first lifter 36 is inserted into a second mounting hole of the slider insert 32, and the spring 37 pushes the first lifter 36 in the second mounting hole. The slider insert 32 and the slider seat 31 are fixed together with screws. The elastic force of the spring 37 pushes the first lifter 36 in the second mounting hole. When the slider seat 31 moves, the first lifter 36 and the first core puller 33 move toward the core 24.

[0033] Preferably, the outer wall of the first core pulling needle 33 is provided with a mounting notch 34; the latch 35 penetrates the slide insert 32 and is locked in the mounting notch 34. The first core pulling needle 33 is inserted into the first mounting hole, and then the latch 35 penetrates the slide insert 32 and is locked in the mounting notch 34. In this way, the first core pulling needle 33 can be firmly fixed to the slide insert 32 without loosening. This assembly structure is very simple.

[0034] Preferably, a first insert 310 is provided on the slide insert 32, and the first insert 310 can move toward the core 24. The first insert 310 can move toward the core 24 along with the movement of the slide seat 31 to form a corresponding shape on the product.

[0035] Preferably, the second end of the first beveled top 36 is exposed at the first core-pulling needle 33; a groove 311 is formed between the first beveled top 36 and the second end of the first core-pulling needle 33. After the first beveled top 36 and the first core-pulling needle 33 are moved into place, the groove 311 corresponds to the hole 41 in the tunnel wall of the earphone housing 40, which facilitates the formation of the hole 41.

[0036] Preferably, the first mold plate 11 is provided with two first mold cores 12, and the second mold plate 21 is provided with two second mold cores 22. Of course, the number of first mold cores 12 and second mold cores 22 is not limited and can be set according to specific needs. Multiple first mold cores 12 and second mold cores 22 can be used together to produce multiple products at a time, thereby improving work efficiency.

[0037] Preferably, the first mold 10 is equipped with guide posts, and the second mold 20 is provided with guide post holes 23 into which the guide posts can be inserted. The second mold plate 21 is provided with a slide groove in which the slider seat 31 can slide. The guide posts and guide post holes 23 cooperate to ensure mold clamping accuracy. The slider seat 31 slides within the slide groove formed between the limit seats, ensuring movement accuracy.

[0038] The present application provides an injection molding machine, comprising the earphone shell 40 injection mold, and the earphone shell 40 injection mold is set on a machine platform.

[0039] In summary, the key design features of the present invention are that the first core-pulling needle 33 and the first inclined top 36 are disposed on the slide seat 31, with the first inclined top 36 obliquely extending through the first core-pulling needle 33; and the spring 37 is disposed on the first inclined top 36. This structure allows the first core-pulling needle 33 to be withdrawn from the tunnel hole first, and then the first core-pulling needle 33 and the first inclined top 36 to be withdrawn from the tunnel hole together to achieve demolding. This simplifies the demolding structure, improves work efficiency, and reduces mold costs.

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An earphone shell injection mold, characterized by: It includes a first mold, a second mold, and a core-pulling mold set, and the first mold and the second mold can be closed together; The core pulling module includes a sliding seat, a first core pulling needle, a first inclined top, a shift block, and a spring. The first core pulling needle and the first inclined top are arranged on the sliding seat; the first inclined top obliquely penetrates the first core pulling needle; the spring is arranged on the first inclined top and can push the first inclined top to move on the first core pulling needle; The shift block is arranged in the first mold; the slider seat is slidably arranged in the second mold, and the oblique shift rod on the shift block can be inserted into the first hole on the slider seat.

2. The earphone shell injection mold according to claim 1, characterized in that: The first mold includes a first template and a first mold core provided on the first template, the first mold core is provided with a cavity, and the shift block is provided on the first template; The second mold includes a second template and a second mold core arranged on the second template. The second mold core is provided with a core, and the slide seat is slidably arranged on the second template.

3. The earphone shell injection mold according to claim 2, characterized in that: A slide insert is provided on the slide seat; the first end of the first core-pulling needle is fixed in the first mounting hole of the slide insert; the first end of the first inclined top is passed through the second mounting hole of the slide insert, and the spring pushes the first inclined top in the second mounting hole.

4. The earphone shell injection mold according to claim 3, characterized in that: The outer wall of the first core-pulling needle is provided with a mounting notch; the latch penetrates the slide insert and is locked in the mounting notch.

5. The earphone shell injection mold according to claim 3, characterized in that: A first insert is provided on the slide insert, and the first insert can move toward the core.

6. The earphone shell injection mold according to claim 1, characterized in that: The second end of the first inclined top is exposed at the first core pulling needle; a groove is formed between the first inclined top and the second end of the first core pulling needle.

7. The earphone shell injection mold according to claim 3, characterized in that: The first template is provided with two first mold cores, and the second template is provided with two second mold cores.

8. The earphone shell injection mold according to claim 2, characterized in that: The first mold is provided with a guide post, and the second mold is provided with a guide post hole, into which the guide post can be inserted; the second mold plate is provided with a slide groove, and the sliding seat can slide in the slide groove.

9. An injection molding machine, characterized in that: The earphone shell injection mold comprises any one of claims 1-8, and the earphone shell injection mold is arranged on a machine platform.

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