SILICA GEL VIBRATING DIAPHRAGM AND METHOD FOR FABRICATING THE SAME

• US 20170238110A1
• Filed: 12/18/2015
• Published: 08/17/2017
• Est. Priority Date: 04/14/2015
• Status: Active Grant

• Current Assignee: Goertek Incorporated
• Original Assignee: Goertek Incorporated
• Inventors: GUO, Xiaodong, WANG, Wenhai
• Granted Patent: US 10,231,071 B2
• Time in Patent Office: Days
• CPC Class Codes: B29C 43/24 Calendering
• CPC Class Codes: B29C 43/245 Adjusting calender parameters, e.g. bank quantity
• CPC Class Codes: B29C 43/28 incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
• CPC Class Codes: B29C 43/30 Making multilayered or multicoloured articles B29C43/26 takes precedence
• CPC Class Codes: B29C 43/58 Measuring, controlling or regulating for bank adjustment in calendering B29C43/245
• CPC Class Codes: B29K 2105/0061 Gel or sol
• CPC Class Codes: B29L 2031/38 Loudspeaker cones; Acoustic diaphragms
• CPC Class Codes: H04R 2307/023 Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
• CPC Class Codes: H04R 2307/025 Diaphragms comprising polymeric materials
• CPC Class Codes: H04R 31/003 for diaphragms or their outer suspension
• CPC Class Codes: H04R 7/06 comprising a plurality of sections or layers
• CPC Class Codes: H04R 7/10 comprising superposed layers in contact
• CPC Class Codes: H04R 7/18 at the periphery

Abstract

The present disclosure discloses a silica gel vibrating diaphragm and a method for fabricating the same. The method comprises: forming a composite material belt by using two layers of a base material and liquid silica gel in a calendering manner, wherein the liquid silica gel is between the two layers of the base material; wholly hot-press molding the composite material belt by a vibrating diaphragm die holder, a temperature of the hot-press molding being higher than a vulcanization temperature of the liquid silica gel; removing the two layers of the base material to obtain a whole sheet of silica gel vibrating diaphragm; and blanking the whole sheet of silica gel vibrating diaphragm that has been removed of the two layers of the base material to fabricate a required silica gel vibrating diaphragm. As compared with conventional solutions, the technical solution of the present disclosure has the advantages of simple molding manner, low cost, various styles of the vibrating diaphragm, and small thickness of the vibrating diaphragm.

Claims

1. A method for fabricating a silica gel vibrating diaphragm, comprising:

forming a composite material belt by using two layers of a base material and liquid silica gel in a calendering manner, wherein the liquid silica gel is between the two layers of the base material;

wholly hot-press molding the composite material belt by a vibrating diaphragm die holder, a temperature of the hot-press molding being higher than a vulcanization temperature of the liquid silica gel;

removing the two layers of the base material to obtain a whole sheet of silica gel vibrating diaphragm; and

blanking the whole sheet of silica gel vibrating diaphragm that has been removed of the two layers of the base material to fabricate a required silica gel vibrating diaphragm.

2. The method according to claim 1, wherein the forming a composite material belt by using two layers of a base material and liquid silica gel in a calendering manner comprises:

placing one layer of the base material at a bottom layer to serve as a lower layer base material, and coating the liquid silica gel onto the lower layer base material by a glue applicator;

adjusting a thickness of the liquid silica gel by a thickness control device, and laying the other layer of the base material on the liquid silica gel to serve as an upper layer base material; and

performing pressure maintaining processing for the lower layer base material, the liquid silica gel and the upper layer base material by a pressure maintaining shaft to obtain the composite material belt.

3. The method according to claim 2, wherein the method comprises during the coating the liquid silica gel onto the lower layer base material by a glue applicator, reserving a gap not coated with the liquid silica gel at an edge of the lower layer base material;

and

after the adjusting a thickness of the liquid silica gel by a thickness control device, when laying the other layer of the base material on the liquid silica gel to serve as the upper layer base material, aligning an edge of the upper layer base material with the edge of the lower layer base material.

4. The method according to claim 3, wherein the liquid silica gel is made by sufficiently mixing two silica gel preparing solutions in proportion.

5. The method according to claim 4, wherein the two layers of the base material are one or two of polyetheretherketone (PEEK), polyethylene terephthalate (PET), polyetherimide (PEI), and thermoplastic polyurethanes (TPU).

6. A silica gel vibrating diaphragm, fabricated by:

forming a composite material belt by using two layers of a base material and liquid silica gel in a calendering manner, wherein the liquid silica gel is between the two layers of the base material;

wholly hot-press molding the composite material belt by a vibrating diaphragm die holder, a temperature of the hot-press molding being higher than a vulcanization temperature of the liquid silica gel;

removing the two layers of the base material to obtain a whole sheet of silica gel vibrating diaphragm; and

blanking the whole sheet of silica gel vibrating diaphragm that has been removed of the two layers of the base material to fabricate a required silica gel vibrating diaphragm.

7. The silica gel vibrating diaphragm according to claim 6, wherein the composite material belt is fabricated by:

placing one layer of the base material at a bottom layer to serve as a lower layer base material, and coating the liquid silica gel onto the lower layer base material by a glue applicator;

adjusting a thickness of the liquid silica gel by a thickness control device, and laying the other layer of the base material on the liquid silica gel to serve as an upper layer base material; and

performing pressure maintaining processing for the lower layer base material, the liquid silica gel and the upper layer base material by a pressure maintaining shaft to obtain the composite material belt.

8. The silica gel vibrating diaphragm according to claim 7, wherein a gap not coated with the liquid silica gel is reserved at an edge of the lower layer base material and an edge of the upper layer base material.

9. The silica gel vibrating diaphragm according to claim 8, wherein the liquid silica gel for fabricating the silica gel vibrating diaphragm is made by sufficiently mixing two silica gel preparing solutions in proportion.

10. The silica gel vibrating diaphragm according to claim 9, wherein the two layers of the base material for fabricating the silica gel vibrating diaphragm are one or two of polyetheretherketone (PEEK), polyethylene terephthalate (PET), polyetherimide (PEI), and thermoplastic polyurethanes (TPU).