Title:
METAL MOLD FOR HOLLOW MOLDING
Document Type and Number:
WIPO Patent Application WO/2006/038617
Kind Code:
A1
Abstract:
[PROBLEMS] Generally, hollow molded articles produced through gas injection in a molten resin are provided with a rib as a gas flow channel. However, this rib poses such a problem that the hollow molded articles at surfaces suffer appearance deteriorations, such as sink, transfer spots and whitening at hollow formation. [MEANS FOR SOLVING PROBLEMS] There is provided a metal mold for production of a molded article with hollow, which metal mold on its cavity surface from the position of injection of pressurized fluid in the cavity or the vicinity of the injection position to the region for forming of the hollow of the molded article or the vicinity of the forming region is furnished with linear surface treatment with a material of thermal conductance different from that of the material of the metal mold so as to cause the surface treatment to fulfill the function as a gas channel.
Inventors:
SUZUKI YASUHIRO (JP)
Application Number:
PCT/JP2005/018352
Publication Date:
April 13, 2006
Filing Date:
October 04, 2005
Export Citation:
Assignee:
FUJI XEROX SUZUKA (JP)
SUZUKI YASUHIRO (JP)
SUZUKI YASUHIRO (JP)
International Classes:
B29C45/37; B29C45/00; B29L22/00
Foreign References:
| JPH0752183A | 1995-02-28 | |||
| JPH06246797A | 1994-09-06 | |||
| JPS62208919A | 1987-09-14 | |||
| JPH0866927A | 1996-03-12 |
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