CN212920242U

CN212920242U - Mould for manufacturing earphone plug

Info

Publication number: CN212920242U
Application number: CN202021444713.4U
Authority: CN
Inventors: 沈庆凯; 胡洪群
Original assignee: Guangdong Chaoyang Electronic Technology Co ltd
Current assignee: Guangdong Chaoyang Electronic Technology Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-04-09
Anticipated expiration: 2030-07-21

Abstract

The utility model relates to a mould for manufacturing an earphone plug, which comprises an inner mould forming mould, an SR button forming mould and an outer mould forming mould, wherein a first cavity of the inner mould forming mould is provided with a groove; the SR button forming die comprises a first upper die and a first lower die, the first lower die is provided with a first contact pin positioning groove and a first mounting hole penetrating through the upper end and the lower end of the first lower die, and a first exhaust insert is arranged in the first mounting hole; the second cavity comprises an SR buckle forming cavity and a placing groove, and the SR buckle forming cavity is formed on the first exhaust insert; the first contact pin positioning groove is provided with a first positioning column mounting hole, a second positioning column mounting hole and a third positioning column mounting hole, each positioning column mounting hole is internally provided with a positioning column, and the three positioning columns are arranged in a triangular shape to limit the contact pins; the SR button forming cavity is convenient to exhaust, disassemble, assemble and replace, and convenience is provided for mold taking; and, still realize spacing to the contact pin, guarantee that the displacement can not appear in the contact pin in the process of moulding plastics, improve injection moulding quality and efficiency.

Description

Mould for manufacturing earphone plug

Technical Field

The utility model belongs to the technical field of an earphone plug technique and specifically relates to indicate a mould of preparation earphone plug.

Background

The earphone is one of the indispensable accessories of the present portable electronic products (such as mobile phone, MP3 walkman, PDA, etc.), and its structure includes an earphone plug for receiving electronic signals and a speaker for converting the electronic signals into sound wave signals. Currently, the most common earphone plugs can be divided into three-section type and four-section type, wherein the three-section type is mainly used for a single-track earphone, and the four-section type is suitable for a stereo earphone. Each section on the earphone terminal is a signal interface, and electronic signals can be interactively transmitted with the electronic product through the earphone socket connected to the electronic product.

The existing mould for manufacturing the earphone plug has poor limiting effect on the contact pin, so that the injection molding quality is influenced due to the displacement of the contact pin in the injection molding process. In addition, an exhaust device is generally arranged for exhausting the mold, and the exhaust device has a single function, is often fixedly arranged on the mold and is not beneficial to replacement.

Therefore, in the present patent application, the applicant has elaborated a new technical solution to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the defects of the prior art, and mainly aims to provide a mould for manufacturing an earphone plug, which has better practicability, is convenient for disassembly and replacement while facilitating the exhaust of an SR button forming cavity, and also provides convenience for taking a mould; and, still improve the spacing effect to the contact pin, guarantee that the displacement can not appear in the contact pin in the process of moulding plastics, improve injection moulding quality and efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a mould for manufacturing an earphone plug comprises an inner mould forming mould, an SR button forming mould and an outer mould forming mould, wherein a first cavity is arranged in the inner mould forming mould, and a groove is concavely arranged on the inner wall surface of the first cavity;

the SR button forming die comprises a first upper die and a first lower die, and a first main runner penetrating through the upper end and the lower end of the first upper die is arranged on the first upper die; the upper end surface of the first lower die is downwards concavely provided with a second cavity, a first mounting hole, a first branch flow channel used for communicating with the first main flow channel in a die closing state, and a first wire positioning groove, a first pin positioning groove and a second branch flow channel which are respectively communicated with the second cavity, the first mounting hole penetrates through the lower end surface of the first lower die, and a first exhaust insert is detachably arranged in the first mounting hole;

the second cavity comprises an SR buckling cavity and a placing groove which is communicated with the SR buckling cavity and used for placing the contact pin wire assembly coated with the inner die, the SR buckling cavity is formed on the first exhaust insert and is respectively communicated with the first shunting channel and the first wire positioning groove, and the placing groove is communicated with the first contact pin positioning groove;

first reference column mounting hole, second reference column mounting hole and third reference column mounting hole have been seted up to the internal face of first contact pin constant head tank, first reference column has been installed in the first reference column mounting hole, second reference column has been installed in the second reference column mounting hole, third reference column has been installed in the third reference column mounting hole, the upper end of first reference column, second reference column and third reference column all stretches into in the first contact pin constant head tank, first reference column, second reference column and third reference column three are triangle-shaped and arrange in order spacing to the contact pin.

As a preferable scheme, a second sub-runner and a first positioning insert mounting groove are further arranged on the upper end surface of the first lower die in a downward concave manner, and the second sub-runner is communicated with the SR buckle forming cavity;

the positioning structure comprises a first positioning insert mounting groove, a second positioning insert mounting groove, a third sub-runner and a fourth sub-runner, wherein the first positioning insert mounting groove is internally provided with the first positioning insert, the side surface of the first positioning insert facing the second cavity is provided with the third sub-runner and the fourth sub-runner, the first sub-runner is communicated with the third sub-runner, the fourth sub-runner is communicated with the second sub-runner, the third sub-runner is communicated with the fourth sub-runner through an auxiliary runner, and the inner walls of the first positioning insert mounting groove and the.

As a preferred scheme, the two second sub-runners are symmetrically arranged on the left side and the right side of the SR buckle forming cavity respectively, and the two second sub-runners are communicated with the fourth sub-runner.

As a preferred scheme, the first positioning insert extends out of the first lower mold, an auxiliary positioning groove is formed in the first positioning insert, and the auxiliary positioning groove and the first wire positioning groove are located on the same axis.

As a preferred scheme, the upper end face of the first lower die is downwards concavely provided with a yielding groove, and the yielding groove is communicated with the auxiliary positioning groove.

As a preferable scheme, the external mold forming mold comprises a second upper mold and a second lower mold, and a second main runner penetrating through the upper end and the lower end of the second upper mold is arranged on the second upper mold;

the upper end face of the second lower die is provided with a third cavity, an outer die forming flow channel and a second positioning insert mounting groove in a downward concave mode, the third cavity is communicated with the outer die forming flow channel, a second positioning insert is arranged in the second positioning insert mounting groove and extends out of the second lower die, a second wire positioning groove is formed in the second positioning insert, and after the second upper die and the second lower die are closed, the second main flow channel is communicated with the outer die forming flow channel.

As a preferable scheme, the second lower die is provided with a second mounting hole and a third mounting hole which penetrate through the upper end and the lower end of the second lower die, a second exhaust insert is detachably arranged in the second mounting hole, and a third exhaust insert is detachably arranged in the third mounting hole;

the second exhaust insert is provided with an SR buckle positioning groove, a second exhaust hole facing the third cavity and communicated with the third cavity, and a third exhaust hole respectively communicated with the second exhaust hole and the outside air, the SR buckle positioning groove is communicated with the third cavity, and the SR buckle positioning groove and the second wire positioning groove are positioned on the same straight line;

and the third exhaust insert is provided with a second contact pin positioning groove, a fourth exhaust hole facing the third cavity and communicated with the third cavity, and a fifth exhaust hole respectively communicated with the fourth exhaust hole and the outside air, and the second contact pin positioning groove is communicated with the third cavity.

As a preferable scheme, the external molding runner is a T-shaped runner, and the external molding runner is provided with a transverse molding runner extending in the left-right direction and a longitudinal molding runner extending in the front-back direction;

after the second upper die and the second lower die are closed, the longitudinal forming runner is communicated with the second main runner; the two third cavities are arranged and are arranged in bilateral symmetry relative to the longitudinal forming runner respectively, and the transverse forming runner is communicated with the two third cavities respectively.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly: the first exhaust insert is detachably arranged in the first mounting hole, and the SR buckle forming cavity is designed on the first exhaust insert, so that the practicability is better, on one hand, the SR buckle forming cavity is convenient to exhaust and is convenient to disassemble and replace, and on the other hand, convenience is provided for mold taking; moreover, the first positioning column, the second positioning column and the third positioning column are arranged in a triangular shape, so that the limiting effect on the contact pin is improved, the contact pin is ensured not to be displaced in the injection molding process, and the injection molding quality and efficiency are improved;

secondly, the auxiliary positioning groove of the first positioning insert is matched with the first wire positioning groove, so that the wire is positioned conveniently, the wire is prevented from displacing in the injection molding process, and the injection molding quality and efficiency are further improved; particularly, the plurality of runners are arranged on the first positioning insert, so that the overall structure of the first lower die is compact, the occupied space is reduced, and the excessive waste materials can be cleaned in time after the first lower die is formed;

and through the matching of the second exhaust insert and the third exhaust insert, on one hand, the positioning of the part to be injection-molded is improved, on the other hand, the exhaust of the third cavity is facilitated, and the injection molding quality is further improved.

To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is an exploded view of a SR buckle forming mold according to a preferred embodiment of the present invention;

FIG. 2 is an exploded view of the outer mold according to the preferred embodiment of the present invention;

fig. 3 is an exploded view of an inner mold forming mold according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of a first lower mold structure according to a preferred embodiment of the present invention;

FIG. 5 is an exploded view of a second lower mold according to a preferred embodiment of the present invention;

FIG. 6 is a schematic diagram of the manufacturing process of the preferred embodiment of the present invention (step 5 is not included);

fig. 7 is a schematic structural view of the pin and wire assembly covered with the outer mold and the metal shell of the present invention without assembly.

The reference numbers illustrate:

10. SR button forming die

11. First upper die 111 and first main runner

12. First lower die 121 and placing groove

122. Second branch runner 123 and first positioning insert mounting groove

124. The abdicating groove 125 and the first wire positioning groove

126. First pin positioning groove 127 and first shunt channel

131. First positioning column mounting hole 132 and second positioning column mounting hole

133. Third positioning column mounting hole

141. First positioning column 142 and second positioning column

143. Third positioning column

15. First positioning insert 151 and auxiliary positioning groove

161. The third sub-flow passage 162 and the fourth sub-flow passage

171. First mounting hole 172 and first exhaust insert

173. SR buckle forming cavity

20. External mold forming die

21. Second upper die 211 and second main runner

22. Second lower die

221. Third cavity 222, outer mold molding runner

223. Second positioning insert mounting groove 224, second mounting hole

225. Third mounting hole

23. Second positioning insert 231 and second wire positioning groove

24. Positioning groove for second exhaust insert 241 and SR buckle

25. Third exhaust insert 251 and second pin positioning groove

30. Internal mold forming mold

31. Upper forming die 32 and lower forming die

321. Lower molding cavity 322 and groove

41. Pin 42 and wire

43. Inner die 431 and back-off

44. SR buckle 45 and outer die

50. Metal case 51, case main body

511. First inner cavity 512 and glue overflow groove

52. Spherical crown body 521 and second inner cavity

126a, a first pin positioning slot 131a, and a first positioning post mounting hole

132a, second positioning column mounting hole 133a, third positioning column mounting hole

141a, a first positioning column 142a, a second positioning column

143a, third positioning posts.

Detailed Description

As shown in fig. 1 to 7, a mold for manufacturing an earphone plug includes an inner mold 30, an SR button mold 10, and an outer mold 20, wherein:

as shown in fig. 3, a first cavity is provided in the inner mold forming mold 30, and a groove is recessed in an inner wall surface of the first cavity; preferably, the internal mold forming mold 30 has an upper mold 31 and a lower mold 32 for forming, the upper mold 31 for forming has an upper forming cavity, the lower mold 32 for forming has a lower forming cavity 321, the lower forming cavity 321 and the upper forming cavity form a first cavity, and the inner wall surface of the lower forming cavity 321 is concavely provided with the groove 322.

As shown in fig. 7, the metal shell 50 has a shell main body 51 and a spherical cap 52 integrally connected to a right end of the shell main body 51, the shell main body 51 has a first inner cavity 511 with a left end opening and a lower end opening, the left end opening of the first inner cavity 511 is communicated with the lower end opening, an overflow groove 512 is formed on an inner wall of the first inner cavity 511, and since glue needs to be dispensed on the inner mold 43 of the pin and wire assembly coated with the outer mold 45 in step 5, after the metal shell 50 and the pin and wire assembly coated with the outer mold 45 are assembled, the glue is also in contact with the first inner cavity 511 and the second inner cavity 521. Therefore, through the design of the glue overflow groove 512, glue can be prevented from overflowing to the surfaces of the metal shell 50 and the socket wire 42 assembly, and the neat appearance is ensured.

The spherical crown body 52 is larger than 1/2 balls, preferably the spherical crown body 52 is larger than 3/4 balls. The spherical cap body 52 is provided with a second inner cavity 521 with an opening at the left end, and the second inner cavity 521 is communicated with the first inner cavity 511;

in the present embodiment, as shown in fig. 1 and 4, the SR button forming die 10 includes a first upper die 11 and a first lower die 12, and the first upper die 11 is provided with a first main runner 111 penetrating through upper and lower ends thereof;

the upper end surface of the first lower die 12 is recessed downwards to form a second cavity, a second branch runner 122, a first positioning insert mounting groove 123, a relief groove 124, a first wire positioning groove 125, a first pin positioning groove 126 and a first branch runner 127 which are respectively communicated with the second cavity, and after the first upper die 11 and the first lower die 12 are closed, the first main runner 111 is communicated with the first branch runner 127;

a first positioning column mounting hole 131, a second positioning column mounting hole 132 and a third positioning column mounting hole 133 are formed in the inner wall surface of the first pin positioning groove 126, a first positioning column 141 is arranged in the first positioning column mounting hole 131, a second positioning column 142 is arranged in the second positioning column mounting hole 132, a third positioning column 143 is arranged in the third positioning column mounting hole 133, the first positioning column 141, the second positioning column 142 and the third positioning column 143 all extend into the first pin positioning groove 126, and the first positioning column 141, the second positioning column 142 and the third positioning column 143 are arranged in a triangular shape. Through the overall arrangement of first reference column 141, second reference column 142 and third reference column 143, can realize pressing from both sides tight location to the grafting end of contact pin 41, avoid contact pin 41 to appear the displacement at the process of moulding plastics.

The second branch runner 122 is communicated with the second cavity, and in this embodiment, the first positioning insert mounting groove 123 penetrates through the left and right ends of the first lower die 12. The wire positioning device is characterized in that a first positioning insert 15 is arranged in the first positioning insert mounting groove 123, the first positioning insert 15 extends out of the first lower die 12, the left end and the right end of the first positioning insert 15 extend out of the first lower die 12, an auxiliary positioning groove 151 used for assisting in positioning a wire 42 is arranged on the upper end face of the first positioning insert 15 in a downward concave mode, the auxiliary positioning groove 151 and the first wire positioning groove 125 are located on the same axis, and the abdicating groove 124 is communicated with the auxiliary positioning groove 151.

In this embodiment, the first lower mold 12 is provided with a first mounting hole 171 penetrating the upper and lower ends thereof, and a first exhaust insert 172 is installed in the first mounting hole 171;

the second cavity comprises an SR buckling cavity 173 and a placing groove 121 which is communicated with the SR buckling cavity 173 and used for placing the inserting needle and wire assembly coated with the inner mold 43, the SR buckling cavity 173 is formed on the first exhaust insert 172, the SR buckling cavity 173 is communicated with the second branch flow passage 122 and the first wire positioning groove 125 respectively, and the placing groove 121 is communicated with the first inserting needle positioning groove 126.

A third branched runner 161 and a fourth branched runner 162 are arranged on the side surface of the first positioning insert 15 facing the second cavity, the first branched runner 127 is communicated with the third branched runner 161, and the fourth branched runner 162 is communicated with the second branched runner 122; preferably, the second branch runners 122 are provided with two and symmetrically arranged at the left and right sides of the SR button forming cavity 173, and both the second branch runners 122 are communicated with the fourth branch runner 162. By arranging the two second branch runners 122, the forming efficiency of the SR buckle 44 can be increased, and the overall injection molding efficiency can be further improved.

The third sub-runner 161 is communicated with the fourth sub-runner 162 through an auxiliary runner, and the first positioning insert 15 and the inner wall of the first positioning insert mounting groove 123 form an auxiliary runner. The first branch flow channel 127 and the second branch flow channel 122 are both extended in the front-rear direction, the third branch flow channel 161 and the fourth branch flow channel 162 are both extended in the up-down direction, and the auxiliary flow channel is extended in the left-right direction.

As shown in fig. 2 and 5, the outer mold 20 includes a second upper mold 21 and a second lower mold 22, and a second main flow passage 211 penetrating upper and lower ends of the second upper mold 21 is provided;

the upper end surface of the second lower die 22 is provided with a third cavity 221, an outer molding runner 222 and a second positioning insert mounting groove 223 in a downward concave manner, the third cavity 221 is communicated with the outer molding runner 222, a second positioning insert 23 is installed in the second positioning insert mounting groove 223 and extends out of the second lower die 22, and in this embodiment, the second positioning insert mounting groove 223 penetrates through the left end and the right end of the first lower die 12. The second positioning insert 23 is provided with a second wire positioning groove 231, and after the second upper mold 21 and the second lower mold 22 are closed, the second main flow passage 211 is communicated with the outer mold forming flow passage 222.

The second lower die 22 is provided with a second mounting hole 224 and a third mounting hole 225 which penetrate through the upper end and the lower end of the second lower die, the second exhaust insert 24 is detachably arranged in the second mounting hole 224, and the third exhaust insert 25 is detachably arranged in the third mounting hole 225;

the second exhaust insert 24 is provided with an SR button positioning groove 241, a second exhaust hole facing the third cavity 221 and communicated with the third cavity 221, and a third exhaust hole respectively communicated with the second exhaust hole and the outside air, the SR button positioning groove 241 is communicated with the third cavity 221, and the SR button positioning groove 241 and the second wire positioning groove 231 are located on the same straight line;

the third exhaust insert 25 is provided with a second pin positioning groove 251, a fourth exhaust hole facing the third cavity 221 and communicated with the third cavity 221, and a fifth exhaust hole respectively communicated with the fourth exhaust hole and the outside air, wherein the second pin positioning groove 251 is communicated with the third cavity 221. Through the design of the second exhaust hole and the fifth exhaust hole, gas can be exhausted from the second exhaust hole and the fifth exhaust hole to the outside, and molten plastic cannot pass through, so that the exhaust effect of the third cavity 221 is stable.

In this embodiment, two third cavities 221 are symmetrically arranged, and each third cavity 221 is provided with a second degassing insert 24 and a third degassing insert 25; the overmold channel 222 is a T-shaped channel having a transverse molding channel extending in the left-right direction and a longitudinal molding channel extending in the front-rear direction;

after the second upper die 21 and the second lower die 22 are closed, the longitudinal molding runner is communicated with a second main runner 211; the third cavities 221 are provided with two transverse molding channels, and the two transverse molding channels are respectively communicated with the two third cavities 221.

It should be noted that the second lower die 22 is also provided with a first pin positioning groove 126a, an inner wall surface of the first pin positioning groove 126a is provided with a first positioning column mounting hole 131a, a second positioning column mounting hole 132a and a third positioning column mounting hole 133a, the first positioning column 141a is installed in the first positioning column mounting hole 131a, the second positioning column 142a is installed in the second positioning column mounting hole 132a, the third positioning column 143a is installed in the third positioning column mounting hole 133a, the first positioning column 141a, the second positioning column 142a and the third positioning column 143a all extend into the first pin positioning groove 126a, and the first positioning column 141a, the second positioning column 142a and the third positioning column 143a are arranged in a triangle.

As shown in fig. 6 and 7, a mold for manufacturing an earphone plug includes the following steps:

(1) preparing a metal shell 50, a pin 41, a wire 42, the inner mold forming die 30, the SR button forming die 10 and the outer mold forming die 20;

(2) firstly, electrically connecting the wire 42 to the pin 41 to form a pin wire component, then placing the pin wire component into the inner mold forming mold 30, and performing first injection molding, so that the electric connection part of the pin 41 and the wire 42 is coated and positioned with the inner mold 43, and the groove 322 is utilized to form the back-off 431 on the inner mold 43; preferably, the inner mold 43 is a PP inner mold;

(3) placing the pin wire assembly coated with the inner mold 43 into the SR button forming mold 10, performing a second injection molding, and coating and positioning an SR button 44 on the ends of the inner mold 43 and the wire 42 close to the inner mold 43, wherein the SR button 44 is preferably an SR button 44 made of TPE;

(4) placing the pin wire assembly coated with the SR buckle 44 into the outer mold forming mold 20 for third injection molding, wherein an outer mold 45 is coated and positioned at the end of the inner mold 43 and the SR buckle 44 close to the inner mold 43; preferably, the outer mold 45 is a TPE outer mold;

(5) glue is dispensed on the inner die 43 of the pin and wire assembly coated with the outer die 45, and then the pin and wire assembly is assembled with the metal shell 50 from left to right, the inner die 43 and the outer die 45 jointly extend into the second inner cavity 521 from the first inner cavity 511, the reverse buckle 431 is adapted to the glue overflow groove 512, the left end of the reverse buckle 431 is abutted against the left side wall of the glue overflow groove 512, and the spherical cap body 52 is circumferentially limited on the inner die 43 and the outer die 45.

The utility model relates to a main points lie in, compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly: the first exhaust insert is detachably arranged in the first mounting hole, and the SR buckle forming cavity is designed on the first exhaust insert, so that the practicability is better, on one hand, the SR buckle forming cavity is convenient to exhaust and is convenient to disassemble and replace, and on the other hand, convenience is provided for mold taking; moreover, the first positioning column, the second positioning column and the third positioning column are arranged in a triangular shape, so that the limiting effect on the contact pin is improved, the contact pin is ensured not to be displaced in the injection molding process, and the injection molding quality and efficiency are improved;

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a mould of preparation earphone plug which characterized in that: the forming die comprises an inner die forming die, an SR button forming die and an outer die forming die, wherein a first cavity is arranged in the inner die forming die, and a groove is concavely arranged on the inner wall surface of the first cavity;

2. The mold for manufacturing a headphone plug according to claim 1, wherein: a second sub-runner and a first positioning insert mounting groove are further arranged on the upper end surface of the first lower die in a downward concave mode, and the second sub-runner is communicated with the SR buckle forming cavity;

3. The mold for manufacturing a headphone plug according to claim 2, wherein: the two second sub-runners are symmetrically arranged on the left side and the right side of the SR buckle forming cavity respectively, and the two second sub-runners are communicated with the fourth sub-runners.

4. The mold for manufacturing a headphone plug according to claim 2, wherein: the first positioning insert extends out of the first lower die, an auxiliary positioning groove is formed in the first positioning insert, and the auxiliary positioning groove and the first wire positioning groove are located on the same axis.

5. The mold for manufacturing a headphone plug according to claim 4, wherein: the upper end face of the first lower die is downwards concavely provided with a yielding groove, and the yielding groove is communicated with the auxiliary positioning groove.

6. The mold for manufacturing a headphone plug according to claim 1, wherein: the outer die forming die comprises a second upper die and a second lower die, and a second main runner penetrating through the upper end and the lower end of the second upper die is arranged on the second upper die;

7. The mold for manufacturing a headphone plug according to claim 6, wherein: the second lower die is provided with a second mounting hole and a third mounting hole which penetrate through the upper end and the lower end of the second lower die, a second exhaust insert is detachably arranged in the second mounting hole, and a third exhaust insert is detachably arranged in the third mounting hole;

8. The mold for manufacturing a headphone plug according to claim 6, wherein: the external mold molding runner is a T-shaped runner and is provided with a transverse molding runner extending in the left-right direction and a longitudinal molding runner extending in the front-back direction;