CN111873306B - Method for manufacturing ear-hanging earphone wire - Google Patents
Method for manufacturing ear-hanging earphone wire Download PDFInfo
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- CN111873306B CN111873306B CN202010732252.9A CN202010732252A CN111873306B CN 111873306 B CN111873306 B CN 111873306B CN 202010732252 A CN202010732252 A CN 202010732252A CN 111873306 B CN111873306 B CN 111873306B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001746 injection moulding Methods 0.000 claims abstract description 44
- 239000003292 glue Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14622—Lining the inner or outer surface of tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
- B29C45/2606—Guiding or centering means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2725—Manifolds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3431—Telephones, Earphones
Abstract
The invention relates to a method for manufacturing an ear-hanging earphone wire, which comprises the following steps: preparing a core wire, a hollow sleeve, a contact pin and an outer mold forming mold; then the contact pin penetrates through the hollow sleeve to form a first hollow sleeve assembly; then the first hollow sleeve pipe assembly is placed into an external mold forming mold for injection molding, so that an external mold is coated and positioned on the outer surface of the hollow sleeve pipe; then the contact pin is drawn out of the hollow sleeve to form the hollow sleeve coated with the outer mold; finally, the core wire penetrates through the hollow sleeve coated with the outer die to form a second hollow sleeve assembly; the outer mold is formed after the contact pin penetrates through the hollow sleeve, and the rigidity of the hollow sleeve containing the contact pin is enhanced, so that the outer mold formed on the outer surface of the hollow sleeve is good in uniformity and flatness, the problems of bubbles and poor adhesion of the outer mold are solved, and the injection molding quality is effectively improved.
Description
Technical Field
The invention relates to the technical field of an ear-hung earphone, in particular to a method for manufacturing an ear-hung earphone wire.
Background
The earphone is a common device in daily life, the ear-hang earphone is produced for improving the wearing comfort and the convenience, the ear-hang earphone is integrated with the connecting wire, the earphone body is connected to the end part of the ear-hang earphone body, the ear-hang earphone body is hung on the ear during use, and the earphone body is just positioned in the ear cavity and is convenient to use.
The existing ear-hang has two main flow structures, one is that an ear-hang sleeve is made by thermal shrinkage shaping of a hollow elastic shrinkage hose, a connecting line is arranged in the ear-hang sleeve in a penetrating way, and finally the two are integrally shaped into an auricle shape; the other method is to directly injection mold a longer external mold on the core wire, so that the external mold containing air bubbles and poor in adhesion is easily obtained, and the normal use of the earphone is influenced.
Therefore, in the present patent application, the applicant has elaborated a new technical solution to solve the above-mentioned problems.
Disclosure of Invention
The invention aims at the defects of the prior art, and mainly aims to provide a method for manufacturing an ear-hanging type earphone wire, so that the uniformity and the flatness of an outer die are better, the problems of bubbles and poor adhesiveness of the outer die are avoided, and the injection molding quality is effectively improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for manufacturing an ear-hanging earphone wire comprises the following steps:
(1) the preparation method comprises the following steps: preparing a core wire, a hollow sleeve, a contact pin and an external mold forming mold, wherein the outer diameter of the contact pin and the outer diameter of the core wire are smaller than the radius of the hollow sleeve;
(2) a needle threading step: penetrating a contact pin through the hollow sleeve to form a first hollow sleeve assembly;
(3) and (3) outer mold forming: placing the first hollow sleeve assembly into an external mold forming mold for injection molding, so that an external mold is coated and positioned on the outer surface of the hollow sleeve;
(4) needle drawing step: extracting the contact pin of the first hollow sleeve assembly coated with the outer mold to the outside of the hollow sleeve to form the hollow sleeve coated with the outer mold;
(5) a core wire threading step: and (3) passing the core wire through the hollow sleeve coated with the outer die to form a second hollow sleeve assembly.
Preferably, in the step of molding the outer mold, a first outer mold is first formed by injection molding on the outer surface of the circumferential half portion of the hollow sleeve, and then a second outer mold is formed by injection molding on the outer surface of the circumferential half portion of the hollow sleeve, wherein the second outer mold is connected with the first outer mold to form the outer mold.
As a preferable scheme, the external mold forming die comprises a first movable die, a second movable die and a fixed die capable of selectively closing the first movable die and the second movable die, and the step (3) further comprises the following steps:
first injection molding: firstly, placing a first hollow sleeve pipe assembly on a first movable mould, and then closing the fixed mould and the first movable mould for injection moulding to ensure that a first outer mould is coated and moulded on the outer surface of the circumferential half part of the hollow sleeve pipe; opening the mold after the first outer mold is cooled, and positioning the first hollow sleeve assembly coated with the first outer mold on the fixed mold;
and (3) second injection molding: and closing the fixed die and the second movable die for injection molding, so that the outer surface of the other circumferential half part of the hollow sleeve is coated with a second outer die.
Preferably, during the first injection molding, the glue position of the first outer mold is stuck on the fixed mold through a water gap and a jig.
As a preferred scheme, the fixed die is fixed in position, after the first hollow sleeve assembly is placed on the first movable die, the first movable die is translated to the lower part of the fixed die, and then is moved upwards to be matched with the fixed die to perform first injection molding, so that a first outer die is obtained, and the first outer die is coated on the outer surface of the upper half part of the hollow sleeve in the circumferential direction; after the first injection molding is finished, the first movable die moves downwards and then moves horizontally to be far away from the fixed die; and then, the second movable die is translated to the lower part of the fixed die, and then is moved upwards to be matched with the fixed die to perform second injection molding to obtain a second outer die, and the second outer die is coated on the outer surface of the lower half part of the hollow sleeve in the circumferential direction.
As a preferable scheme, the method further comprises the following steps: (6) a tail buckle forming step: and placing the second hollow sleeve assembly into a tail buckle forming die for injection molding, and coating and positioning the tail buckle at the tail end of the outer die.
As a preferable scheme, the first movable mold is provided with a first positioning groove, and the second movable mold is provided with a second positioning groove and a second cavity which is further recessed inwards on the inner wall surface of the second positioning groove;
the fixed die is provided with a third positioning groove, a pouring gate, a main runner, a first sub-runner, a second sub-runner and a first cavity which is further arranged on the inner wall surface of the third positioning groove in a concave mode, the main runner can be selectively communicated with the first sub-runner and the second sub-runner, and the first sub-runner is communicated with the first cavity; and the second sub-runner is communicated with the second cavity in the state that the fixed die and the second movable die are closed.
As a preferable scheme, the fixed die is provided with a first mounting hole and a second mounting hole, the first mounting hole is respectively communicated with the main flow passage and the first branch flow passage, the first mounting hole is internally provided with a first stop member for blocking or opening the main flow passage to be communicated with the first branch flow passage, and the second mounting hole is internally provided with a second stop member for blocking or opening the main flow passage to be communicated with the second branch flow passage.
As a preferred scheme, the first movable die is connected with a first positioning jig, the first positioning jig is provided with a first auxiliary positioning groove, and the first auxiliary positioning groove and the first positioning groove are located on the same axis;
the fixed die is connected with a second positioning jig, a second auxiliary positioning groove is formed in the first positioning jig, and the second auxiliary positioning groove and the second positioning groove are located on the same axis;
the first positioning jig is detachably connected to the second positioning jig, and the first auxiliary positioning groove and the second auxiliary positioning groove form an auxiliary positioning groove for positioning the first hollow sleeve assembly.
As a preferred scheme, one of the first positioning jig and the second positioning jig has a clamping protrusion, and the other has a clamping groove, the first positioning jig is connected with the second positioning jig, and the clamping protrusion is adapted in the clamping groove.
Compared with the prior art, the invention has obvious advantages and beneficial effects, particularly: the outer mold is formed after the contact pin penetrates through the hollow sleeve, and the rigidity of the hollow sleeve containing the contact pin is enhanced, so that the outer mold formed on the outer surface of the hollow sleeve is good in uniformity and flatness, the problems of bubbles and poor adhesion of the outer mold are avoided, and the injection molding quality is effectively improved;
secondly, the fixed die is matched with the first movable die and the second movable die respectively, so that the injection molding can be carried out on the periphery of the hollow sleeve twice, the phenomenon of glue shortage in the process of injecting a longer outer die can be prevented, and the production efficiency and quality of the outer die are further ensured;
the whole manufacturing steps are simple, the production and the manufacture are convenient, and the popularization is facilitated; meanwhile, the outer mold forming mold is provided with corresponding positioning grooves, so that the hollow sleeve can be conveniently positioned, and the stability and reliability of the whole manufacturing process are ensured.
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 a schematic diagram of the distribution structure of an external molding die and a tail buckle molding die according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a stationary mold assembly according to a preferred embodiment of the present invention;
FIG. 3 is a schematic illustration of a stationary mold exploded view of the preferred embodiment of the present invention;
FIG. 4 is a schematic view of a first movable mold structure according to a preferred embodiment of the present invention;
FIG. 5 is a schematic view of a second movable mold structure according to the preferred embodiment of the present invention;
FIG. 6 is a flow chart of the general overmolding process of the preferred embodiment of the invention;
FIG. 7 is a cross-sectional view of a second hollow tube assembly in accordance with a preferred embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a manufacturing process (step 6 is not shown) according to a preferred embodiment of the present invention.
The reference numbers illustrate:
10. first movable mold
11. First positioning groove 12 and first cooling system
20. The second movable mold 21 and the second positioning groove
22. Second cavity 23, second cooling system
30. Fixed mould
31. Third cooling system 32, heating system
33. Third positioning groove 34, gate
35. Main runner 361 and first branch runner
362. Second branch runner 37 and first cavity
38. Transition chamber 391, first mounting hole
392. Second mounting hole 393, first stopper
394. Second stop member
40. Tail buckle forming die
51. Hollow sleeve 52, insert pin
53. Core wire
541. First outer die 542 and second outer die
61. First positioning fixture
611. First auxiliary positioning groove 612 and clamping groove
62. Second positioning fixture
621. A second auxiliary positioning groove 622 and a locking protrusion.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
As shown in fig. 1 to 8, a method for manufacturing an ear-hook type earphone wire includes the following steps:
(1) the preparation method comprises the following steps: preparing a core wire 53, a hollow sleeve 51, a contact pin 52, an external mold forming die and a tail buckle forming die 40, wherein the outer diameter of the contact pin 52 and the outer diameter of the core wire 53 are smaller than the radius of the hollow sleeve 51; preferably, the hollow sleeve 51 is an extruded TPE hollow sleeve, but may be a hollow sleeve made of other materials, which is not limited herein.
(2) A needle threading step: passing the pin 52 through the hollow sleeve 51 to form a first hollow sleeve assembly;
(3) an outer mold forming step: placing the first hollow sleeve assembly into an external mold forming mold for injection molding, so that an external mold is positioned on the outer surface of the hollow sleeve 51 in a covering manner, preferably, the external mold is a transparent TPE external mold, and the length of the external mold is approximately 70 mm;
(5) needle drawing step: extracting the inserting needle 52 of the first hollow sleeve assembly coated with the external mold to the outside of the hollow sleeve 51 to form the hollow sleeve 51 coated with the external mold;
(5) a core wire threading step: the core wire 53 passes through the hollow sleeve 51 coated with the outer die in a needle threading mode to form a second hollow sleeve assembly;
(6) a tail buckle forming step: and placing the second hollow sleeve assembly into a tail buckle forming die 40 for injection molding, and coating and positioning a tail buckle at the tail end of the outer die and the connecting part of the tail end of the outer die and the hollow sleeve 51.
In the present embodiment, the external molding die is located in front of the tail-tab molding die 40, and the external molding die includes a first movable die 10, a second movable die 20, and a fixed die 30 that can be selectively clamped with the first movable die 10 and the second movable die 20, wherein:
preferably, the fixed mold 30 is located above the first movable mold 10, the first movable mold 10 and the second movable mold 20 are arranged in parallel at a left-right distance, and both the first movable mold 10 and the second movable mold 20 can be mounted on a conveying device (not shown) to switch the mold clamping of one of the first movable mold and the second movable mold with the fixed mold 30 after the mold opening of the other one of the first movable mold and the second movable mold; preferably, the conveying device is a three-axis manipulator, but may have other structures, and is not limited herein.
The first movable die 10 is provided with a first positioning groove 11, the second movable die 20 is provided with a second positioning groove 21 and a second cavity 22 which is further inwards recessed on the inner wall surface of the second positioning groove 21, and the first positioning groove 11 and the second positioning groove 21 are both used for positioning a first hollow sleeve assembly; the first movable die 10 is provided with a first cooling system 12, the second movable die 20 is provided with a second cooling system 23, and the fixed die 30 is provided with a third cooling system 31 and a heating system 32.
The fixed mold 30 is provided with a third positioning groove 33, a gate 34, a main flow channel 35, a first branch flow channel 361, a second branch flow channel 362 and a first cavity 37 which is further inwards recessed from the inner wall surface of the third positioning groove 33, the main flow channel 35 can be selectively communicated with the first branch flow channel 361 and the second branch flow channel 362, and the first branch flow channel 361 is communicated with the first cavity 37; in a state in which the fixed mold 30 and the second movable mold 20 are clamped, the second branch flow passage 362 communicates with the second cavity 22 through the corresponding transition cavity 38.
The fixed mold 30 is provided with a first mounting hole 391 and a second mounting hole 392, the first mounting hole 391 is respectively communicated with the main flow passage 35 and the first sub-flow passage 361, a first stopper 393 is arranged in the first mounting hole 391 to block or open the main flow passage 35 to be communicated with the first sub-flow passage 361, and a second stopper 394 is arranged in the second mounting hole 392 to block or open the main flow passage 35 to be communicated with the second sub-flow passage 362.
The first movable die 10 is connected with a first positioning jig 61, a first auxiliary positioning groove 611 is arranged on the first positioning jig 61, and the first auxiliary positioning groove 611 and the first positioning groove 1111 are located on the same axis;
the fixed die 30 is connected with a second positioning jig 62, a second auxiliary positioning groove 621 is arranged on the first positioning jig 61, and the second auxiliary positioning groove 621 and the second positioning groove 21 are located on the same axis;
the first positioning jig 61 is detachably connected to the second positioning jig 62, preferably, one of the first positioning jig 61 and the second positioning jig 62 has a clamping protrusion 622, and the other has a clamping groove 612, when the fixed die 30 and the first movable die 11 are assembled, the first positioning jig 61 is connected to the second positioning jig 62, and the clamping protrusion 622 is adapted to the clamping groove 612. The first and second auxiliary positioning slots 611 and 621 form auxiliary positioning slots for positioning the first hollow sleeve assembly.
In the step of outer mold molding, a first outer mold 541 is first formed by first injection molding on the outer surface of the circumferential half portion of the hollow sleeve 51, and then a second outer mold 542 is formed by second injection molding on the outer surface of the other circumferential half portion of the hollow sleeve 51, wherein the second outer mold 542 is connected with the first outer mold 541 to form an outer mold.
In this embodiment, the step (3) further includes the following steps:
first injection molding: firstly, placing a first hollow sleeve pipe assembly on a first movable mould 10, closing the fixed mould 30 and the first movable mould 10 for injection moulding, and coating the outer surface of the circumferential half part of the hollow sleeve pipe 51 to form a first outer mould 541; opening the mold after the first outer mold 541 is cooled, and positioning the first hollow sleeve assembly coated with the first outer mold 541 on the fixed mold 30; preferably, when the first injection molding is carried out, the glue position of the first outer die is stuck on the fixed die through the water gap and the jig.
And (3) second injection molding: the fixed mold 30 and the second movable mold 20 are clamped for injection molding, so that the other circumferential half part of the outer surface of the hollow sleeve 51 is coated with a second outer mold 542, and the second outer mold 542 is connected with the first outer mold 541 to form an outer mold. It should be noted that during both the first injection and the second injection, the heating system 32 is required to be kept in operation to ensure that the injection molding material is kept in a molten state.
It should be noted that, the fixed mold 30 is fixed in position, after the first hollow sleeve assembly is placed on the first movable mold 10, the first movable mold 10 is translated to the lower side of the fixed mold 30, and then is moved upward to be matched with the fixed mold 30 for the first injection molding, so as to obtain a first outer mold 541, and the first outer mold 541 is coated on the outer surface of the upper half part of the hollow sleeve 51 in the circumferential direction; after the first injection molding is completed, the first movable mold 10 moves downwards and then moves horizontally to be far away from the fixed mold 30; then, the second movable mold 20 is translated to the lower part of the fixed mold 30, and then moved upwards to be matched with the fixed mold 30 for the second injection molding, so as to obtain a second outer mold 542, and the second outer mold 542 is coated on the outer surface of the circumferential lower half part of the hollow sleeve 51.
In the present embodiment, the number of the first cavities 37 is four, and correspondingly, the number of the second cavities 22 is also four, each of the first cavities 37 and the second cavities 22 extends in the left-right direction, the first positioning grooves 1111, the second positioning grooves 21, the third positioning grooves 33, the first shunting passage 361, the second shunting passage 362, the first auxiliary positioning grooves 611, and the second auxiliary positioning grooves 621 are provided with four and extend in the left-right direction, the first shunting passage 361 and the second shunting passage 362 are alternately arranged from front to back, the first mounting holes 391 and the first stoppers 393 are provided with four, and the second mounting holes 392 and the second stoppers 394 are provided with four.
The design key points of the invention lie in that compared with the prior art, the invention has obvious advantages and beneficial effects, specifically: the outer mold is formed after the contact pin penetrates through the hollow sleeve, and the rigidity of the hollow sleeve containing the contact pin is enhanced, so that the outer mold formed on the outer surface of the hollow sleeve is good in uniformity and flatness, the problems of bubbles and poor adhesion of the outer mold are avoided, and the injection molding quality is effectively improved;
secondly, the fixed die is matched with the first movable die and the second movable die respectively, so that the injection molding can be carried out on the periphery of the hollow sleeve twice, the phenomenon of glue shortage in the process of injecting a longer outer die can be prevented, and the production efficiency and quality of the outer die are further ensured;
the whole manufacturing steps are simple, the production and the manufacture are convenient, and the popularization is facilitated; meanwhile, the outer mold forming mold is provided with corresponding positioning grooves, so that the hollow sleeve can be conveniently positioned, and the stability and reliability of the whole manufacturing process are ensured.
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 minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (4)
1. A method for manufacturing an ear-hanging earphone wire is characterized in that: the method comprises the following steps:
(1) the preparation method comprises the following steps: preparing a core wire, a hollow sleeve, a contact pin and an external mold forming mold, wherein the outer diameter of the contact pin and the outer diameter of the core wire are smaller than the radius of the hollow sleeve; the outer die forming die comprises a first movable die, a second movable die and a fixed die which can be selectively matched with the first movable die and the second movable die;
(2) a needle threading step: penetrating a contact pin through the hollow sleeve to form a first hollow sleeve assembly;
(3) and (3) outer mold forming: placing the first hollow sleeve assembly into an external mold forming mold for injection molding, so that an external mold is coated and positioned on the outer surface of the hollow sleeve; in the step of outer mold forming, a first outer mold is coated and formed on the outer surface of the circumferential half part of the hollow sleeve through first injection molding, a second outer mold is coated and formed on the outer surface of the other circumferential half part of the hollow sleeve through second injection molding, and the second outer mold is connected with the first outer mold to form an outer mold;
first injection molding: firstly, placing a first hollow sleeve pipe assembly on a first movable mould, and then closing the fixed mould and the first movable mould for injection moulding to ensure that a first outer mould is coated and moulded on the outer surface of the circumferential half part of the hollow sleeve pipe; opening the mold after the first outer mold is cooled, and positioning the first hollow sleeve assembly coated with the first outer mold on the fixed mold; during the first injection molding, the glue position of the first outer mold is stuck on the fixed mold through the water gap and the jig;
and (3) second injection molding: closing the fixed die and the second movable die for injection molding, so that the outer surface of the other half part of the circumference of the hollow sleeve is coated with a second outer die;
the first movable die is provided with a first positioning groove, the second movable die is provided with a second positioning groove and a second cavity which is further inwards recessed in the inner wall surface of the second positioning groove;
the fixed die is provided with a third positioning groove, a pouring gate, a main runner, a first sub-runner, a second sub-runner and a first cavity which is further arranged on the inner wall surface of the third positioning groove in a concave mode, the main runner can be selectively communicated with the first sub-runner and the second sub-runner, and the first sub-runner is communicated with the first cavity; the second sub-runner is communicated with the second cavity in the state that the fixed die and the second movable die are closed;
the first movable die is connected with a first positioning jig, a first auxiliary positioning groove is formed in the first positioning jig, and the first auxiliary positioning groove and the first positioning groove are located on the same axis;
the fixed die is connected with a second positioning jig, a second auxiliary positioning groove is formed in the first positioning jig, and the second auxiliary positioning groove and the second positioning groove are located on the same axis;
the first positioning jig is detachably connected to the second positioning jig, and the first auxiliary positioning groove and the second auxiliary positioning groove form an auxiliary positioning groove for positioning the first hollow sleeve assembly;
(4) needle drawing step: extracting the contact pin of the first hollow sleeve assembly coated with the outer mold to the outside of the hollow sleeve to form the hollow sleeve coated with the outer mold;
(5) a core wire threading step: the core wire penetrates through the hollow sleeve coated with the outer die to form a second hollow sleeve assembly;
(6) a tail buckle forming step: and placing the second hollow sleeve pipe assembly into a tail buckle forming die for injection molding, and coating and positioning the tail buckle at the tail end of the outer die.
2. The method of making an earhook earphone wire according to claim 1, wherein: the fixed die is fixed in position, after the first hollow sleeve pipe assembly is placed on the first movable die, the first movable die is translated to the position below the fixed die, and then the first movable die moves upwards to be matched with the fixed die for first injection molding to obtain a first outer die, and the first outer die is coated on the outer surface of the upper half part of the hollow sleeve pipe in the circumferential direction; after the first injection molding is completed, the first movable mold moves downwards and then moves horizontally to be far away from the fixed mold; and then, the second movable die is translated to the lower part of the fixed die, and then is moved upwards to be matched with the fixed die to perform second injection molding to obtain a second outer die, and the second outer die is coated on the outer surface of the lower half part of the hollow sleeve in the circumferential direction.
3. The method of making an earhook earphone wire according to claim 1, wherein: the fixed die is provided with a first mounting hole and a second mounting hole, the first mounting hole is respectively communicated with the main runner and the first branch runner, a first stop piece is arranged in the first mounting hole to block or open the main runner to be communicated with the first branch runner, and a second stop piece is arranged in the second mounting hole to block or open the main runner to be communicated with the second branch runner.
4. The method of making an earhook earphone wire according to claim 1, wherein: one of the first positioning jig and the second positioning jig is provided with a clamping protrusion, the other one of the first positioning jig and the second positioning jig is provided with a clamping groove, the first positioning jig is connected with the second positioning jig, and the clamping protrusion is matched in the clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732252.9A CN111873306B (en) | 2020-07-27 | 2020-07-27 | Method for manufacturing ear-hanging earphone wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732252.9A CN111873306B (en) | 2020-07-27 | 2020-07-27 | Method for manufacturing ear-hanging earphone wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111873306A CN111873306A (en) | 2020-11-03 |
| CN111873306B true CN111873306B (en) | 2022-07-01 |
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| CN111873306A (en) | 2020-11-03 |
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