CN115091122A - Production process of L-shaped plastic support sound film - Google Patents
Production process of L-shaped plastic support sound film Download PDFInfo
- Publication number
- CN115091122A CN115091122A CN202210606598.3A CN202210606598A CN115091122A CN 115091122 A CN115091122 A CN 115091122A CN 202210606598 A CN202210606598 A CN 202210606598A CN 115091122 A CN115091122 A CN 115091122A
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- Prior art keywords
- sound film
- sound
- shaped
- fixing part
- substrate
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000012528 membrane Substances 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 7
- 238000004080 punching Methods 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 34
- 239000003292 glue Substances 0.000 claims description 13
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000003698 laser cutting Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- -1 polybutylene terephthalate Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
A production process of an L-shaped plastic support sound film is used for producing the L-shaped plastic support sound film; the L-shaped plastic supporting sound film comprises a sound film body and an L-shaped supporting frame arranged on the sound film body, and a sound film fixing part is arranged on the sound film body; the sound film fixing part is designed in an annular shape, the cross section of the sound film fixing part is in an L shape, and the L-shaped supporting frame is arranged on the inner side surface of the sound film fixing part; the production process of the L-shaped plastic support sound film comprises the following steps: gluing; molding; cutting holes; punching the inner diameter and the outer diameter; and (6) attaching the membrane. The L-shaped support frame and the sound film body are bonded and assembled more reliably by gluing and molding; the PBT material is used for replacing the metal material, so that the problems of cutting and puncture of the sound film caused by the L-shaped support frame are solved; the vent holes are cut at the corners of the L-shaped support frame, so that air bubbles can not be generated when the vent holes are attached to the sound film body; the invention has strong practicability and stronger popularization significance.
Description
Technical Field
The invention relates to the field of sound film production processes, in particular to a production process of an L-shaped plastic support sound film.
Background
The sound film, i.e. the diaphragm, also commonly called "cone", is the core component of the speaker, and is the key for the speaker to convert the level signal into the audio signal. When the loudspeaker inputs an electric signal, the electric signal drives the vibrating diaphragm to vibrate through the principle of electromagnetic effect, piezoelectric effect or electrostatic effect, so that an audio signal is sent out.
In a conventional sound membrane with an L-shaped ring, the ring is usually stamped and formed by copper, steel and other metal materials in the production process. However, in the stamping process, the top end portion of the ring is very likely to have defects such as sharp corners and burrs, so that the risk of cutting and puncturing the sound membrane main body exists in the subsequent assembly process. Moreover, because the ring made of traditional metal materials does not have a ventilation effect, the phenomenon of bubbles is easily generated at the middle corner of the ring during stamping, and the quality of products is affected. In addition, when the stamped ring is assembled subsequently, the middle corner of the ring is difficult to glue uniformly, and the assembly and bonding quality is poor, so that the reliability of the sound film product is greatly reduced.
Disclosure of Invention
In view of the above, it is necessary to provide a production process of an L-shaped plastic supporting sound film for overcoming the disadvantages in the prior art.
A production process of an L-shaped plastic support sound film is used for producing the L-shaped plastic support sound film. The L-shaped plastic supporting sound film comprises a sound film body and an L-shaped supporting frame arranged on the sound film body, and a sound film fixing part is arranged on the sound film body. The sound film fixing part is designed in an annular shape, the cross section of the sound film fixing part is in an L shape, and the L-shaped supporting frame is arranged on the inner side face of the sound film fixing part. The production process of the L-shaped plastic support sound film comprises the following steps:
step 1: gluing, namely providing a substrate made of PBT (polybutylene terephthalate), and coating glue on the inner surface of the substrate, which is required to be attached to the sound film fixing part;
step 2: forming, namely forming more than one hollow bulge on the substrate, wherein the caliber of the groove on the back surface of the hollow bulge is consistent with the inner diameter of the L-shaped support frame;
and 3, step 3: cutting holes, namely cutting a plurality of exhaust holes at the joint of the hollow bulge and the plane of the substrate, wherein the exhaust holes are uniformly arranged at intervals along the circumference;
and 4, step 4: punching the inner diameter and the outer diameter, respectively cutting the outer diameter and the inner diameter on the periphery of the hollow bulge and the upper end surface of the hollow bulge in a punching mode, so that the hollow bulge is separated from the surface of the substrate to form an L-shaped support frame, and the diameter of the cut outer diameter is equal to the outer diameter of the ring of the sound film fixing part;
and 5: and the laminated membrane is sleeved with the sound membrane body from top to bottom at the upper end of the L-shaped support frame, so that the inner side surface of the sound membrane fixing part is laminated with the L-shaped support frame, glue between the sound membrane fixing part and the L-shaped support frame is hot-melted by heating, and finally the glue is cooled and solidified to bond the sound membrane body and the L-shaped support frame into a whole to form the L-shaped plastic supporting sound membrane.
Further, the substrate is integrated into a mold by hot press molding, that is, the substrate is molded by air pressure molding equipment so that the substrate plane forms more than one hollow bulge.
Further, in the step 3, a laser cutting mode is adopted for hole cutting.
In conclusion, the production process of the L-shaped plastic support sound film has the beneficial effects that: by adopting the processing steps of gluing and molding, the corners of the L-shaped support frame can be uniformly glued, and finally the L-shaped support frame and the sound film body are more reliably bonded and assembled; the PBT material is selected as the raw material for forming the L-shaped support frame to replace the traditional metal material, so that the probability of sharp corners and burrs at the edge after forming is greatly reduced, and the problems of cutting and piercing on the sound film caused by the sharp corners and burrs on the L-shaped support frame are effectively avoided; the vent holes are cut at the corners of the L-shaped support frame in a laser cutting mode, so that when the sound film body is attached subsequently, the film material and the L-shaped support frame can be attached tightly without generating bubbles, and the quality of the sound film product is obviously improved; the invention has strong practicability and stronger popularization significance.
Drawings
FIG. 1 is a process flow diagram of a production process of an L-shaped plastic support sound film according to the present invention;
FIG. 2 is an exploded view of the L-shaped plastic membrane according to the present invention;
FIG. 3 is a schematic cross-sectional view of a substrate after being sized according to the present invention;
FIG. 4 is a schematic cross-sectional view of a substrate formed according to the present invention;
FIG. 5 is a schematic cross-sectional view of the L-shaped support frame of the present invention after the inner and outer diameters are punched.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the advantages and spirit of the present invention will be further understood by reference to the following detailed description and the accompanying drawings.
As shown in fig. 1, the present invention provides a production process of an L-shaped plastic-supported sound membrane 100, which is used for producing the L-shaped plastic-supported sound membrane 100. The L-shaped plastic supporting diaphragm 100 comprises a diaphragm body 10 and an L-shaped supporting frame 20 mounted on the diaphragm body 10, wherein a diaphragm fixing part 11 is arranged on the diaphragm body 10. The sound diaphragm fixing part 11 is designed in a ring shape, the cross section of the sound diaphragm fixing part 11 is in an L shape, and the L-shaped support 20 is installed on the inner side surface of the sound diaphragm fixing part 11.
The production process of the L-shaped plastic support sound film 100 comprises the following steps:
step 1: gluing, namely providing a substrate 30 made of PBT (polybutylene terephthalate), coating glue 40 on the inner surface of the substrate 30, which is required to be attached to the sound film fixing part 11, wherein the glue 40 is high-temperature hot-melt glue, namely the glue 40 is easy to melt and liquefy at high temperature and is easy to cool and solidify at low temperature;
step 2: molding, namely integrating the substrate 30 into a mold by adopting a hot press molding mode, namely molding the substrate 30 by using air pressure molding equipment to form more than one hollow bulge 50 on the plane of the substrate 30; in the molding process, firstly, the substrate 30 is flatly laid on the supporting and fixing sheet above the bottom die; then the upper cylinder is pressed down under the action of the telescopic arm, the cylinder and the bottom die jointly act to clamp and fix the edge of the substrate 30, and the main body part of the substrate 30 is positioned in a closed cylinder cavity; then, the cylinder cavity is heated to soften the main body part of the substrate 30, meanwhile, the air pressure in the cylinder cavity is continuously increased, and the substrate 30 is shaped through the air pressure; after the shaping is finished, waiting for the substrate 30 to be cooled and solidified again, and taking out the supporting and fixing piece together with the substrate 30 from the bottom die; finally, separating the substrate 30 from the supporting and fixing sheet to obtain the substrate 30 with the hollow bulge 50 on the surface, wherein the caliber of the groove on the back surface of the hollow bulge 50 is consistent with the inner diameter of the L-shaped support frame 20;
and 3, step 3: cutting holes, namely cutting a plurality of vent holes 60 at the joint part of the hollow bulge 50 and the plane of the substrate 30 in a laser cutting mode, wherein the vent holes 60 are uniformly arranged at intervals along the circumference;
and 4, step 4: punching inner and outer diameters, namely respectively cutting an outer diameter and an inner diameter on the periphery of the hollow bulge 50 and the upper end surface of the hollow bulge by adopting a punching mode to separate the hollow bulge 50 from the surface of the substrate 30 to form an L-shaped support frame 20, wherein the diameter of the cut outer diameter is equal to the outer diameter of the ring of the sound film fixing part 11;
and 5: the sound diaphragm body 10 is sleeved on the upper end of the L-shaped support frame 20 from top to bottom, the inner side face of the sound diaphragm fixing portion 11 is attached to the L-shaped support frame 20, glue 40 between the sound diaphragm fixing portion 11 and the L-shaped support frame 20 is hot-melted through heating, and finally the glue 40 is cooled and solidified to bond the sound diaphragm body 10 and the L-shaped support frame 20 into a whole, so that the L-shaped plastic support sound diaphragm 100 is formed.
In summary, the production process of the L-shaped plastic supporting sound film 100 of the present invention has the following beneficial effects: by adopting the processing steps of gluing and molding, the corners of the L-shaped support frame 20 can be glued uniformly, and finally the L-shaped support frame 20 and the sound film body 10 are bonded and assembled more reliably; the raw material for forming the L-shaped support frame 20 is made of PBT material instead of traditional metal material, so that the probability of sharp corners and burrs at the edge after forming is greatly reduced, and the problems of cutting and piercing of the sound film caused by the sharp corners and burrs on the L-shaped support frame 20 are effectively avoided; the vent holes 60 are cut at the corners of the L-shaped support frame 20 in a laser cutting mode, so that when the sound film body 10 is attached subsequently, the film material and the L-shaped support frame 20 can be attached tightly without generating bubbles, and the quality of a sound film product is obviously improved; the invention has strong practicability and stronger popularization significance.
The above-mentioned embodiments only express one embodiment of the invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.
Claims (3)
1. A production process of an L-shaped plastic support sound film is characterized by being used for producing the L-shaped plastic support sound film; the L-shaped plastic supporting sound film comprises a sound film body and an L-shaped supporting frame arranged on the sound film body, and a sound film fixing part is arranged on the sound film body; the sound film fixing part is designed in an annular shape, the cross section of the sound film fixing part is in an L shape, and the L-shaped supporting frame is arranged on the inner side surface of the sound film fixing part; the production process of the L-shaped plastic support sound film comprises the following steps:
step 1: gluing, namely providing a substrate made of PBT (polybutylene terephthalate), and coating glue on the inner surface of the substrate, which is required to be attached to the sound film fixing part;
and 2, step: forming, namely forming more than one hollow bulge on the substrate, wherein the caliber of the groove on the back surface of the hollow bulge is consistent with the inner diameter of the L-shaped support frame;
and step 3: cutting holes, namely cutting a plurality of exhaust holes at the joint of the hollow bulge and the plane of the substrate, wherein the exhaust holes are uniformly arranged at intervals along the circumference;
and 4, step 4: punching the inner diameter and the outer diameter, respectively cutting the outer diameter and the inner diameter on the periphery of the hollow bulge and the upper end surface of the hollow bulge in a punching mode, so that the hollow bulge is separated from the surface of the substrate to form an L-shaped support frame, and the diameter of the cut outer diameter is equal to the outer diameter of the ring of the sound film fixing part;
and 5: and the laminated membrane is sleeved with the sound membrane body from top to bottom at the upper end of the L-shaped support frame, so that the inner side surface of the sound membrane fixing part is laminated with the L-shaped support frame, glue between the sound membrane fixing part and the L-shaped support frame is hot-melted by heating, and finally the glue is cooled and solidified to bond the sound membrane body and the L-shaped support frame into a whole to form the L-shaped plastic supporting sound membrane.
2. The process for producing an L-shaped plastic supported sound diaphragm as claimed in claim 1, wherein: the substrate is integrated into a mold by adopting a hot press molding mode, namely, the substrate is molded by air pressure molding equipment so that the substrate plane forms more than one hollow bulge.
3. The process for producing an L-shaped plastic supported sound diaphragm as claimed in claim 1, wherein: and 3, cutting holes by adopting a laser cutting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606598.3A CN115091122A (en) | 2022-05-31 | 2022-05-31 | Production process of L-shaped plastic support sound film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606598.3A CN115091122A (en) | 2022-05-31 | 2022-05-31 | Production process of L-shaped plastic support sound film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115091122A true CN115091122A (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210606598.3A Pending CN115091122A (en) | 2022-05-31 | 2022-05-31 | Production process of L-shaped plastic support sound film |
Country Status (1)
| Country | Link |
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| CN (1) | CN115091122A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110026752A1 (en) * | 2008-07-18 | 2011-02-03 | Geoertek Inc. | Miniature microphone, protection frame thereof and method for manufacturing the same |
| CN102625226A (en) * | 2012-04-07 | 2012-08-01 | 歌尔声学股份有限公司 | Assembling method for mini-size loudspeaker assembly |
| CN103391498A (en) * | 2012-05-08 | 2013-11-13 | 吴礼裕 | Composite sound film structure and composite technology thereof |
| CN104038886A (en) * | 2014-06-24 | 2014-09-10 | 梧州恒声电子科技有限公司 | Processing technique for speaker frame with a plurality of ear patterns |
| CN104056906A (en) * | 2014-06-27 | 2014-09-24 | 梧州恒声电子科技有限公司 | Processing method of horn basin stand |
| CN105033582A (en) * | 2015-07-28 | 2015-11-11 | 十堰德远科技开发有限公司 | Machining technology of breathable insert of moving die used for automobile door panel horn |
| CN205160779U (en) * | 2015-11-20 | 2016-04-13 | 东莞市方振塑胶电子制品有限公司 | Loudspeaker vibrating diaphragm |
| CN107820193A (en) * | 2017-09-27 | 2018-03-20 | 江苏裕成电子有限公司 | Vibrating diaphragm and vibrating diaphragm preparation method |
| CN207354584U (en) * | 2017-08-29 | 2018-05-11 | 瑞声科技(新加坡)有限公司 | Microphone device |
| US20190069056A1 (en) * | 2017-08-22 | 2019-02-28 | Samsung Electronics Co., Ltd. | Sound component with sealing member and electronic device with the same |
| CN211959533U (en) * | 2019-12-30 | 2020-11-17 | 瑞声科技(新加坡)有限公司 | Skeleton and speaker |
| CN113132887A (en) * | 2021-04-20 | 2021-07-16 | 东莞舒铂迈特精工实业有限公司 | Metal ring processing technology of vibrating diaphragm assembly |
| CN113141566A (en) * | 2021-04-28 | 2021-07-20 | 歌尔微电子股份有限公司 | Pickup assembly for microphone, bone conduction microphone and electronic product |
| CN214412945U (en) * | 2020-10-26 | 2021-10-15 | 华为技术有限公司 | Assembling device of loudspeaker assembly and loudspeaker assembly |
-
2022
- 2022-05-31 CN CN202210606598.3A patent/CN115091122A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110026752A1 (en) * | 2008-07-18 | 2011-02-03 | Geoertek Inc. | Miniature microphone, protection frame thereof and method for manufacturing the same |
| CN102625226A (en) * | 2012-04-07 | 2012-08-01 | 歌尔声学股份有限公司 | Assembling method for mini-size loudspeaker assembly |
| CN103391498A (en) * | 2012-05-08 | 2013-11-13 | 吴礼裕 | Composite sound film structure and composite technology thereof |
| CN104038886A (en) * | 2014-06-24 | 2014-09-10 | 梧州恒声电子科技有限公司 | Processing technique for speaker frame with a plurality of ear patterns |
| CN104056906A (en) * | 2014-06-27 | 2014-09-24 | 梧州恒声电子科技有限公司 | Processing method of horn basin stand |
| CN105033582A (en) * | 2015-07-28 | 2015-11-11 | 十堰德远科技开发有限公司 | Machining technology of breathable insert of moving die used for automobile door panel horn |
| CN205160779U (en) * | 2015-11-20 | 2016-04-13 | 东莞市方振塑胶电子制品有限公司 | Loudspeaker vibrating diaphragm |
| US20190069056A1 (en) * | 2017-08-22 | 2019-02-28 | Samsung Electronics Co., Ltd. | Sound component with sealing member and electronic device with the same |
| CN207354584U (en) * | 2017-08-29 | 2018-05-11 | 瑞声科技(新加坡)有限公司 | Microphone device |
| CN107820193A (en) * | 2017-09-27 | 2018-03-20 | 江苏裕成电子有限公司 | Vibrating diaphragm and vibrating diaphragm preparation method |
| CN211959533U (en) * | 2019-12-30 | 2020-11-17 | 瑞声科技(新加坡)有限公司 | Skeleton and speaker |
| CN214412945U (en) * | 2020-10-26 | 2021-10-15 | 华为技术有限公司 | Assembling device of loudspeaker assembly and loudspeaker assembly |
| CN113132887A (en) * | 2021-04-20 | 2021-07-16 | 东莞舒铂迈特精工实业有限公司 | Metal ring processing technology of vibrating diaphragm assembly |
| CN113141566A (en) * | 2021-04-28 | 2021-07-20 | 歌尔微电子股份有限公司 | Pickup assembly for microphone, bone conduction microphone and electronic product |
Non-Patent Citations (1)
| Title |
|---|
| 夏焱传: "扬声器盆架引伸成形工艺探讨", 模具工业, vol. 1, no. 04, pages 270 - 4 * |
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Application publication date: 20220923 |