Title:
【発明の名称】スピーカーグリル及びその成形方法
Document Type and Number:
Japanese Patent JP2887832
Kind Code:
B2
Abstract:
In a speaker grille formed of a synthetic resin, including a grille plate having a plurality of through holes and a frame integrally formed with the grille plate so as to surround the outer periphery of the grille plate, a ring-shaped groove is formed between the grille plate and the frame so as to extend along the inner periphery of the frame. In molding the speaker grille, the flow of the resin is blocked by a ring-shaped dam provided in a metal mold to form the ring-shaped groove. Accordingly, the speaker grille can be beautifully molded without the generation of appearance defects such as flow mark, weld, and short. Further, in forming through holes also at the boundary between the grille plate and the frame, there is no problem in strength of the metal mold.
Inventors:
KURIHARA KAZUMASA
Application Number:
JP10195694A
Publication Date:
May 10, 1999
Filing Date:
April 15, 1994
Export Citation:
Assignee:
NIFUKO KK
International Classes:
B29C45/00; H04R1/02; H04R31/00; (IPC1-7): H04R1/02; H04R31/00
Domestic Patent References:
| JP6337800A | ||||
| JP286294U | ||||
| JP5850699Y2 |
Attorney, Agent or Firm:
Takashi Kojima