US 11,981,061 B2
Preparation method of a passive horn
Shuhong Cen, Huizhou (CN); and Cheng Ho, Huizhou (CN)
Assigned to TYMPHANY ACOUSTIC TECHNOLOGY (HUIZHOU) CO., LTD., Huizhou (CN)
Filed by Tymphany Acoustic Technology (Huizhou) Co., Ltd., Huizhou (CN)
Filed on May 7, 2019, as Appl. No. 16/405,500.
Claims priority of application No. 201810426800.8 (CN), filed on May 7, 2018.
Prior Publication US 2020/0001509 A1, Jan. 2, 2020
Int. Cl. B29C 45/14 (2006.01); B29C 35/02 (2006.01); B29C 45/16 (2006.01); G10K 13/00 (2006.01); H04R 7/04 (2006.01); H04R 31/00 (2006.01); B29K 69/00 (2006.01); B29K 83/00 (2006.01); B29K 705/12 (2006.01); B29L 31/38 (2006.01)
CPC B29C 45/1671 (2013.01) [B29C 35/02 (2013.01); B29C 45/14819 (2013.01); B29C 45/1676 (2013.01); G10K 13/00 (2013.01); H04R 7/04 (2013.01); H04R 31/003 (2013.01); B29C 2045/1673 (2013.01); B29K 2069/00 (2013.01); B29K 2083/005 (2013.01); B29K 2705/12 (2013.01); B29K 2995/002 (2013.01); B29L 2031/38 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A preparation method of a passive horn including a first outer casing, a second outer casing, an inner casing and an iron piece, the first outer casing comprising a sealing ring, a folding ring and a vibrating membrane, the method comprising:
positioning the iron piece in a mold by means of a positioning hole formed on the iron piece;
injection-molding the first outer casing, the second outer casing and the inner casing by injecting a plastic raw material or liquid silicone rubber raw material into the mold, wherein the sealing ring, the folding ring and the vibrating membrane are integrally injection molded to form an integral structure, the iron piece is wrapped by the inner casing and the second outer casing is disposed around the inner casing; and
after completing the injection-molding, removing the mold by heating and vulcanization to form the passive horn.