Title:
METAL MOLD DEVICE FOR FORMING OPTICAL DISK
Document Type and Number:
WIPO Patent Application WO/2002/051608
Kind Code:
A1
Abstract:
A metal mold device for forming an optical disk capable of uniformizing a metal mold temperature around a product cavity so that the dimensional accuracy of an optical disk can be increased, comprising a cavity block and a core block installed opposedly to the cavity block, wherein the product cavity is formed between the cavity block and the core block, a temperature adjusting flow passage allowing coolant to flow therein is provided in the cavity block and the core block, and a distance from the surface of the product cavity to a communication passage part of the product cavity is increased in the communication passage par for lowering the cooling capacity for each unit area the temperature adjusting flow passage, whereby the cooling capacity can be lowered by increasing a heat conductive distance to optimally adjust the surface temperature of the product cavity.
Inventors:
CHIHARA TOSHIHIRO (JP)
HORIKAWA YOSHIHIRO (JP)
HORIKAWA YOSHIHIRO (JP)
Application Number:
PCT/JP2001/011362
Publication Date:
July 04, 2002
Filing Date:
December 25, 2001
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
CHIHARA TOSHIHIRO (JP)
HORIKAWA YOSHIHIRO (JP)
CHIHARA TOSHIHIRO (JP)
HORIKAWA YOSHIHIRO (JP)
International Classes:
B29C45/73; B29C45/26; B29D17/00; G11B7/26; (IPC1-7): B29C33/04; B29C45/72; G11B7/26
Foreign References:
| JPH05212755A | 1993-08-24 | |||
| JP2000296535A | 2000-10-24 | |||
| JP2000000826A | 2000-01-07 | |||
| JP2001266416A | 2001-09-28 | |||
| JPH08156027A | 1996-06-18 | |||
| JPH10230524A | 1998-09-02 | |||
| US5551625A | 1996-09-03 | |||
| JP2000071301A | 2000-03-07 | |||
| JP2001293759A | 2001-10-23 |
Attorney, Agent or Firm:
Shiga, Masataka (23-3 Takadanobaba 3-chom, Shinjuku-ku Tokyo, JP)
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