A forming process for ear-hanging earphones

Abstract

The application discloses a forming process of ear-hanging earphones and relates to the technical field of earphones, which comprises the following steps: step one, titanium wire pretreatment; step two, titanium wire injection molding; step three, titanium wire glue coating; step four, oil pressure forming; step five, deburring and polishing; and step six, outer surface spraying. The application can improve the hardness of the titanium wire by pretreating the titanium wire, so that the titanium wire is not prone to deformation after use. Meanwhile, the injection molding glue completely wraps the outer surface of the titanium wire by adopting the top-to-bottom flowing injection molding. Moreover, the modified injection molding glue can improve the high-temperature resistance of the earphone and prevent the earphone from discoloration and oxidation after use. The cooperation of the connecting agent and the adhesive can improve the adhesion and tightness of the plastic part and the earphone support after connection, so that the earphone is not prone to delamination after use. Moreover, the release agent can facilitate the recycling of the titanium wire and save the manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to earphone technical field, more particularly, the present application relates to a kind of ear hanging earphone forming process. BACKGROUND

[0002] At present, with the development of electronic products, the use of mobile phones and computers can not only improve people's work efficiency, but also can provide people with entertainment in leisure time, and more and more people begin to like wearing earphone to use electronic products to listen to songs and watch movies, so that people have certain requirements on earphone sound quality, and pay more and more attention to the use quality and use quality of earphone.

[0003] Earphone is divided into ear-in type and ear hanging type, different wearing mode earphone is selected according to the different hobbies of users, among which ear hanging earphone is a kind of earphone with auxiliary hanging decoration added on the side of earphone to facilitate use, and ear hanging earphone gradually becomes the communication equipment commonly used by high-end talents, which is hung on the ear when worn, reduces the burden of human ear, and can make users not only limited to the sound in earphone, but also can conveniently hear the message from outside world.

[0004] However, the shell used in the earphone is mostly made of plastic at present, which has low service life and is easily affected by the use environment, such as temperature, humidity and oxidation degree, and is prone to phenomena such as delamination, discoloration and deformation and fracture, which affects the service life of earphone and the use effect of users, therefore, the present application provides an ear hanging earphone forming process. SUMMARY

[0005] The technical scheme of the present application provides a solution significantly different from the prior art to solve the technical problem that the prior art solution is too single, in order to overcome the above-mentioned defects of the prior art, the present application provides an ear hanging earphone forming process to solve the problem that the shell used in the earphone is mostly made of plastic at present, which has low service life and is easily affected by the use environment, such as temperature, humidity and oxidation degree, and is prone to phenomena such as delamination, discoloration and deformation and fracture, which affects the service life of earphone and the use effect of users.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an ear hanging earphone forming process, specifically comprising the following processing steps:

[0007] Step one, after high-temperature pretreatment of titanium wire, oxygen and nitrogen are sequentially introduced, and after the titanium wire is cooled, the pretreated titanium wire is obtained;

[0008] Step two, the pretreated titanium wire is placed in the flowable injection molding glue, after the injection molding glue completely wraps the titanium wire, the titanium wire is taken out and subjected to high-temperature vulcanization treatment, and the injection molding part is obtained;

[0009] Step three, smearing the connecting agent on the surface of the injection molded part, and after the connecting agent is cooled, high temperature vulcanization treatment is carried out to obtain a molded plastic part;

[0010] Step four, connecting the molded plastic part to the earphone support at both ends, and sequentially spraying the connecting agent at the connection, and then carrying out three times of oil pressure vulcanization molding, which is specifically:

[0011] S1, placing the connected plastic part and earphone support in the first molding mold filled with high-temperature solid silicone for the first time of oil pressure vulcanization molding, and after cooling, placing it in tap water for 3 minutes;

[0012] S2, placing the plastic part and earphone support after the first time of oil pressure vulcanization molding in the second molding mold for the second time of oil pressure vulcanization molding, and after cooling, placing it in tap water for 5 minutes;

[0013] S3, placing the plastic part and earphone support after the second time of oil pressure vulcanization molding in the third molding mold for the third time of oil pressure vulcanization molding, and after cooling, placing it in tap water for 7 minutes to obtain a rough earphone;

[0014] Step five, placing the obtained rough earphone in water at 80℃ for 30 minutes, taking it out and naturally cooling and drying, and after the surface is dry, carrying out ultrasonic deburring on the rough earphone, and finally polishing the surface of the rough earphone to obtain a smooth earphone;

[0015] Step six, smearing a layer of silicone gloss oil on the surface of the smooth earphone, and carrying out high temperature vulcanization treatment again, and finally smearing a layer of ink on the outer surface and carrying out drying.

[0016] Optionally, in step one, the titanium wire is high-temperature treated at 800-900℃, and oxygen with a content of 20mg / m3 and nitrogen with a content of 5mg / m3 are introduced.

[0017] Optionally, in step two, the injection plastic is smearing on the surface of the titanium wire from top to bottom, and is vulcanized at a temperature of 60-75℃ for 10-15 minutes, and the injection plastic is mixed by AB glue, antioxidant, ultraviolet absorber and curing agent in a ratio of 1:0.2:0.3:0.5.

[0018] Optionally, in step three, the connecting agent is glue, and is vulcanized at a temperature of 76-80℃ for 15-20 minutes.

[0019] Optionally, in step four, the specific raw material of the adhesive is silicone rubber adhesive, curing agent, coupling agent, solvent oil and curing accelerator, the silicone rubber adhesive, coupling agent and solvent oil are added into the container, then dispersed for 10-15 minutes by high-speed disperser, after stirring uniformly, the curing agent and curing accelerator are added, and stirred for 15 minutes again.

[0020] Optionally, in step four, the first time oil pressure vulcanization forming environment is under the condition of temperature 140-165 DEG C, pressure 100~110kg / cm, and the first time oil pressure vulcanization forming is 2-5 minutes, the second time oil pressure vulcanization forming environment is under the condition of temperature 140-165 DEG C, pressure 100~110kg / cm, and the first time oil pressure vulcanization forming is 5-8 minutes, and the third time oil pressure vulcanization forming environment is under the condition of temperature 140-165 DEG C, pressure 100~110kg / cm, and the first time oil pressure vulcanization forming is 8-10 minutes.

[0021] Optionally, in step four, the surface of the molded plastic part is coated with a release agent, and then the two ends are connected to the earphone support;

[0022] The release agent is composed of paraffin, stearic acid, vegetable oil, emulsifying agent, potassium hydroxide, alkali agent, propyl gallate and deionized water, the paraffin, stearic acid and emulsifying agent are added into a container and heated to 60-80 DEG C to melt, the deionized water, potassium hydroxide, alkali agent and propyl gallate are placed in another container, mixed uniformly and heated to 80-90 DEG C, and finally mixed to form.

[0023] The technical effects and advantages of the application are as follows:

[0024] By high temperature pretreatment of titanium wire, by injecting oxygen and nitrogen, the titanium wire reacts with oxygen and nitrogen at high temperature, which can improve the hardness of titanium wire, prolong the service life of earphone, avoid the fracture and deformation of titanium wire, and adopt the top-down flow type to coat the injection molding glue on the surface of titanium wire, which can make the injection molding glue completely wrap the surface of titanium wire, and the use of connecting agent and adhesive can improve the tightness and adhesion of titanium wire and silica gel, avoid the phenomenon of degumming after daily use of the earphone;

[0025] By adding antioxidants, ultraviolet absorbers and curing agents in the original AB glue, the oxidation of the earphone can be reduced, and the discoloration phenomenon after use can be reduced, which meets the daily use effect of the earphone, and through three different degrees of high temperature vulcanization, the high temperature resistance of the earphone during use can be improved, and after each high temperature vulcanization, the earphone is immersed in tap water, which can adapt to different environments in the processing and forming process, and improve the service life of the earphone.

[0026] The rough earphone is subjected to high-temperature cooking, so that burrs on the surface of the earphone after injection molding are softened, the outer surface of the earphone is conveniently polished, the ultrasonic deburring is convenient for polishing the micro burrs on the surface of the earphone shell, the comfort of the user when wearing is improved, the titanium wire in the waste earphone can be recycled by using the release agent, the manufacturing cost is saved, the comfort of the earphone shell is improved after the silicone matt oil is applied on the surface of the earphone, and the adhesion of the ink to the surface of the earphone is improved after the ink is sprayed, so that the phenomenon of ink falling and discoloration is reduced. DETAILED DESCRIPTION

[0027] In order to make the application purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the following described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] The technical solutions of the present application will be further described through specific embodiments.

[0029] A forming process of an ear-hanging earphone, specifically comprising the following processing steps:

[0030] Step one, after high-temperature pretreatment of titanium wire, oxygen and nitrogen are sequentially introduced, and after the titanium wire is cooled, the pretreated titanium wire is obtained;

[0031] Step two, the pretreated titanium wire is placed in a flowable injection molding glue, after the injection molding glue completely wraps the titanium wire, the titanium wire is taken out and subjected to high-temperature vulcanization treatment, and an injection molding part is obtained;

[0032] Step three, a connecting agent is applied on the surface of the injection molding part, and after the connecting agent is cooled, high-temperature vulcanization treatment is performed, and a formed plastic part is obtained;

[0033] Step four, the two ends of the formed plastic part are connected with the earphone support, and a connecting agent is sequentially sprayed at the connection, and then the three times of oil pressure vulcanization forming are performed, which specifically are:

[0034] S1, the connected plastic part and the earphone support are placed in a first forming mold filled with high-temperature solid silicone for the first time of oil pressure vulcanization forming, and after cooling, they are placed in tap water for soaking for 3 minutes;

[0035] S2, the plastic part and the earphone support after the first time of oil pressure vulcanization forming are placed in a second forming mold for the second time of oil pressure vulcanization forming, and after cooling, they are placed in tap water for soaking for 5 minutes;

[0036] S3, placing the plastic part and earphone support after the second oil pressure vulcanization forming in the third forming mold for the third oil pressure vulcanization forming, and placing it in tap water for soaking for 7 min after cooling to obtain a rough earphone;

[0037] Step five, placing the obtained rough earphone in water at 80℃ for cooking for 30 min, and naturally cooling and drying after taking out, and performing ultrasonic deburring on the rough earphone after its surface is dry, and finally polishing the surface of the rough earphone to obtain a smooth earphone;

[0038] Step six, smearing a layer of silica gel matting oil on the surface of the smooth earphone, and again performing high temperature vulcanization treatment, and finally smearing a layer of ink on the outer surface and drying.

[0039] After drying, a shaped ear-hanging earphone is obtained.

[0040] Example 2,

[0041] A forming process of an ear-hanging earphone, specifically comprising the following processing steps:

[0042] Step one, high temperature pretreatment of titanium wire at 800℃, and sequentially passing in oxygen with a content of 20mg / m3 and nitrogen with a content of 5mg / m3, and obtaining pretreated titanium wire after the titanium wire is cooled;

[0043] Step two, placing the pretreated titanium wire in a flowable injection plastic, and smearing the injection plastic on the surface of the titanium wire in a top-to-bottom flow manner, and taking out the titanium wire after the injection plastic completely wraps the titanium wire, and performing vulcanization at a temperature of 60℃ for 12 min to obtain an injection molded part;

[0044] Step three, smearing a connecting agent on the surface of the injection molded part in step two, and performing vulcanization at a temperature of 78℃ for 20 min after the connecting agent is cooled to obtain a shaped plastic part;

[0045] Step four, smearing a layer of release agent on the surface of the shaped plastic part obtained in step three, and connecting earphone supports at both ends of the shaped plastic part, and sequentially spraying a connecting agent at the connecting portions at both ends, and then performing three times of oil pressure vulcanization forming, which specifically comprises:

[0046] S1, placing the plastic part and earphone support after connection in a first forming mold filled with high temperature solid silica gel for oil pressure vulcanization forming, and performing one time of oil pressure vulcanization forming at a temperature of 155℃ and a pressure of 108kg / cm for 4 min, and placing it in tap water for soaking for 3 min after cooling;

[0047] S2, the plastic part and earphone support after the first oil pressure vulcanization forming is placed in the second forming die again for the second oil pressure vulcanization forming, the second oil pressure vulcanization forming environment is temperature 160℃, pressure 105 / kg / cm under the condition of one oil pressure vulcanization forming 6min, after cooling, it is placed in the tap water and soaked for 7min;

[0048] S3, the plastic part and earphone support after the second oil pressure vulcanization forming is placed in the third forming die for the third oil pressure vulcanization forming, the third oil pressure vulcanization forming environment is temperature 158℃, pressure 110kg / cm under the condition of one oil pressure vulcanization forming 10min, after cooling, it is placed in the tap water and soaked for 9min, get the rough earphone;

[0049] Step five, the rough earphone in step four is placed in 80℃ water and cooked for 30min, after taking out, it is naturally cooled and dried, after the surface is dry, the rough earphone is ultrasonic deburring, finally, the surface is polished and polished, get the smooth earphone;

[0050] Step six, a layer of silica gel gloss oil is applied on the surface of the smooth earphone in step five, and finally, high temperature vulcanization treatment is carried out again, then a layer of ink is applied on the outer surface, after drying, the formed ear hanging earphone is obtained.

[0051] Example 3,

[0052] A forming process of ear hanging earphone, specifically comprising the following processing steps:

[0053] Step one, the titanium wire is pretreated at 900℃, and then oxygen with a content of 20mg / m3 and nitrogen with a content of 5mg / m3 are introduced, after the titanium wire is cooled, the pretreated titanium wire is obtained;

[0054] Step two, the pretreated titanium wire is placed in the flowable injection plastic, the injection plastic is applied on the surface of the titanium wire in the form of from top to bottom flow, after the injection plastic completely wraps the titanium wire, the titanium wire is taken out, and is vulcanized at a temperature of 70℃ for 14min, to obtain an injection molded part;

[0055] Step three, the surface of the injection molded part in step two is coated with a connecting agent, after the connecting agent is cooled, it is vulcanized at a temperature of 80℃ for 18min, to obtain a molded plastic part;

[0056] Step four, a layer of release agent is applied on the surface of the molded plastic part obtained in step three, and earphone supports are connected to the two ends respectively, and a connecting agent is sprayed on the connecting parts of the two ends in turn, then it is subjected to three oil pressure vulcanization forming, which is specifically:

[0057] S1, the plastic part and earphone support after connecting is placed in the first forming mold containing high temperature solid silicone inside oil pressure vulcanization forming, the first oil pressure vulcanization forming environment is temperature 160 DEG C, pressure 110 kg / cm under the condition of one time oil pressure vulcanization forming 5 min, after cooling, it is placed in tap water and soaked 3 min;

[0058] S2, the plastic part and earphone support after one time oil pressure vulcanization forming is placed again in the second forming mold inside and carries out second time oil pressure vulcanization forming, the second oil pressure vulcanization forming environment is temperature 165 DEG C, pressure 102 / kg / cm under the condition of one time oil pressure vulcanization forming 8 min, after cooling, it is placed in tap water and soaked 7 min;

[0059] S3, the plastic part and earphone support after second time oil pressure vulcanization forming is placed in the third forming mold and carries out third time oil pressure vulcanization forming, the third oil pressure vulcanization forming environment is temperature 160 DEG C, pressure 108 kg / cm under the condition of one time oil pressure vulcanization forming 9 min, after cooling, it is placed in tap water and soaked to 9 min, gets the rough earphone;

[0060] Step five, the rough earphone in step four is placed in 80 DEG C water and cooked 30 min, after taking out, it is naturally cooled and dried, after its surface is dry, the rough earphone is carried out ultrasonic deburring, finally its surface is polished and polished, gets the smooth earphone;

[0061] Step six, a layer of silicone gloss oil is applied on the surface of the smooth earphone in step five, finally, high temperature vulcanization treatment is carried out again, then a layer of ink is applied on its outer surface, after drying, the formed ear hanging earphone is obtained.

[0062] Performance test:

[0063] The ear hanging earphone prepared according to the above embodiments 1-3 is tested for multiple performances, wherein the test method is:

[0064] 1) degumming test, by twisting the silicone of titanium wire part, clockwise / counterclockwise each twist 3 times, observe whether the silicone and titanium wire have degumming phenomenon;

[0065] 2) salt spray test: the test equipment is salt spray test test box, test box test temperature: 35 DEG C ± 2 DEG C; Salt solution concentration: 5% ± 1%; PH value: 6.5-7.2; Spray cycle: 24H, after the spray test is finished, the sample is taken out from the test box, and is placed at room temperature for 24H, then is washed with tap water or distilled water not more than 35 DEG C for 5 minutes, observe the appearance of silicone material without abnormality, no sticky hand, no discoloration, degumming and other abnormal phenomena;

[0066] 3) Put the product into boiling water at 80℃ for 30 minutes, and then observe whether the product has the phenomena of explosion, discoloration, deformation, blistering, spots, surface peeling, delamination, etc.

[0067] 4) Delamination test: manually peel off to check the adhesion of silicone and substrate on the curved surface, F>20N, and there is no delamination phenomenon between silicone and substrate.

[0068] According to the above test method, after the delamination test, salt spray test, boiling test and delamination test of examples 1-3, the test data are shown in the following table:

[0069]

[0070] Summary:

[0071] According to the data in the above table, the forming method of example 1 for ear hanging earphone is the most moderate, and the effect used is obviously better than examples 2-3 after a number of experimental tests, which is specifically shown as follows:

[0072] 1) In the delamination test, the connection between the titanium wire and the silicone does not appear delamination on the surface by twisting clockwise and counterclockwise, which can adapt to the daily use of users and improve the service life of the earphone, thereby proving that the titanium wire is pretreated at high temperature, and the titanium wire reacts with oxygen and nitrogen at high temperature to improve the hardness of the titanium wire and the service life of the earphone, avoid the titanium wire from breaking and deforming, and the injection molding glue is applied on the surface of the titanium wire in the way of flowing from top to bottom, which can completely wrap the injection molding glue on the surface of the titanium wire, and the use of the connecting agent can improve the tightness of the connection between the titanium wire and the silicone, avoiding the delamination of the earphone after daily use;

[0073] 2) In the salt spray test, the earphone is placed in the salt spray test chamber and washed with tap water to test the environment used by the earphone in daily life, which shows that the surface of the product is normal, not sticky, and no discoloration and delamination phenomenon occurs, which proves that the addition of antioxidants, ultraviolet absorbers and curing agents in the original AB glue can reduce the oxidation resistance of the earphone, thereby reducing the discoloration of the earphone after use;

[0074] 3) In the boiling test, the earphone is placed in boiling water at 80℃ for 30 minutes to test the high temperature resistance of the earphone during use, which shows that the surface of the product has no explosion, discoloration, deformation, blistering, spots and peeling and delamination phenomenon, which proves that the three different degrees of high temperature vulcanization can improve the high temperature resistance of the earphone during use, and the use of tap water immersion after each high temperature vulcanization can adapt the earphone to different environments during processing and forming, and improve the service life of the earphone;

[0075] 4) When the peeling test is performed, the adhesion of the silica gel to the substrate on the curved surface is checked by hand peeling, and the result is F=25N, which meets the daily adhesion of earphone production, thus indicating that after the molded plastic part is connected with the earphone support by spraying the adhesive, the adhesion of the plastic part to the earphone support can be improved, and the phenomenon of peeling off is not easy to occur.

[0076] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0077] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0078] The above-described and above-embodied examples are merely used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing examples, it should be understood by those of ordinary skill in the art that the technical solutions recorded in the foregoing examples can still be modified, or some technical features thereof can be replaced by equivalents; and such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A process for forming an ear-hanging earphone, characterized by: The application relates to a method for manufacturing an earphone. The method comprises the following steps: Step 1: high-temperature pretreatment is conducted on titanium wires, oxygen and nitrogen are sequentially introduced into the titanium wires, and the pretreated titanium wires are obtained after the titanium wires are cooled; Step 2: the pretreated titanium wires are placed in a flowing injection glue, the titanium wires are taken out after the injection glue completely wraps the titanium wires, and the titanium wires are subjected to high-temperature vulcanization treatment to obtain an injection molded part; Step 3: a connecting agent is applied on the surface of the injection molded part, the connecting agent is subjected to high-temperature vulcanization treatment after being cooled to obtain a molded plastic part; Step 4: the two ends of the molded plastic part are connected with earphone supports, and a connecting agent is sprayed on the connecting positions, and the connecting agent is subjected to three times of oil pressure vulcanization forming, which specifically comprises the following steps: S1: the connected plastic part and the earphone support are placed in a first forming mold filled with high-temperature solid silicone for the first time of oil pressure vulcanization forming, and the connected plastic part and the earphone support are placed in tap water for 3 minutes after being cooled; S2: the connected plastic part and the earphone support subjected to the first time of oil pressure vulcanization forming are placed in a second forming mold for the second time of oil pressure vulcanization forming, and the connected plastic part and the earphone support are placed in tap water for 5 minutes after being cooled; S3: the connected plastic part and the earphone support subjected to the second time of oil pressure vulcanization forming are placed in a third forming mold for the third time of oil pressure vulcanization forming, and the connected plastic part and the earphone support are placed in tap water for 7 minutes after being cooled to obtain an earphone prototype; Step 5: the obtained earphone prototype is placed in water at 80 DEG C for 30 minutes, and is naturally cooled and dried after being taken out, the earphone prototype is subjected to ultrasonic deburring after the surface of the earphone prototype is dried, and the surface of the earphone prototype is finally polished to obtain a smooth earphone; 2. A process for forming an ear-hanging earphone as claimed in claim 1, wherein: Step 6: a layer of silicone matt oil is applied on the surface of the smooth earphone, and high-temperature vulcanization treatment is conducted again, and a layer of ink is applied on the outer surface of the earphone and is dried.

3. A process for forming an ear-hanging earphone as claimed in claim 1, wherein: In step 1, the titanium wires are subjected to high-temperature treatment at 800-900 DEG C, and oxygen with a content of 20 mg / m3 and nitrogen with a content of 5 mg / m3 are introduced.

4. The process as claimed in claim 1, wherein: In step 2, the injection glue is applied on the surface of the titanium wires in an up-to-down flowing mode, and is subjected to vulcanization treatment at a temperature of 60-75 DEG C for 10-15 minutes, the injection glue is mixed by AB glue, an antioxidant, an ultraviolet absorber and a curing agent in a proportion of 1:0.2:0.3:0.

5.

5. The process as claimed in claim 1, wherein: In step 3, the connecting agent is glue, and is subjected to vulcanization treatment at a temperature of 76-80 DEG C for 15-20 minutes. In step 4, the connecting agent is specifically made of organic silicone rubber adhesive, a curing agent, a coupling agent, solvent oil and a curing accelerator, the organic silicone rubber adhesive, the coupling agent and the solvent oil are added into a container, and are then dispersed for 10-15 minutes by using a high-speed dispersion machine, the curing agent and the curing accelerator are added after the mixture is uniformly stirred, and the mixture is stirred for 15 minutes again.

6. The process according to claim 1, wherein: In step four, the first oil pressure vulcanization forming environment is temperature 140-165℃, pressure 100~110kg / cm conditions under the first oil pressure vulcanization forming 2-5min, the second oil pressure vulcanization forming environment is temperature 140-165℃, pressure 100~110kg / cm conditions under the first oil pressure vulcanization forming 5-8min, the third oil pressure vulcanization forming environment is temperature 140-165℃, pressure 100~110kg / cm conditions under the first oil pressure vulcanization forming 8-10min.

7. The process as claimed in claim 1, wherein the ear hook is formed by the process of: In step four, the surface of the molded plastic parts is coated with a release agent, and then the two ends are connected to the earphone support; The release agent is composed of paraffin wax, stearic acid, vegetable oil, emulsifier, potassium hydroxide, alkali agent, propyl gallate and deionized water. Paraffin wax, stearic acid, emulsifier and vegetable oil are added to a container and heated to 60-80℃ to melt. Deionized water, potassium hydroxide, alkali agent and propyl gallate are mixed in another container and heated to 80-90℃. Finally, the mixture is obtained.

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