Title:
CYLINDRICAL PRODUCT MADE OF FIBER-REINFORCED RESIN MATERIAL, INJECTION MOLDING DIE THEREFOR, AND INJECTION MOLDING METHOD
Document Type and Number:
WIPO Patent Application WO/2016/136601
Kind Code:
A1
Abstract:
[Problem] To improve the strength of the portion of a cylindrical product, which is made of a fiber-reinforced resin material, in which a weld line is formed. [Solution] An injection molding die 2 is configured so that by injecting reinforcing fiber-containing molten resin from a gate 13 into a cavity 7 formed between an outer piece 3 and a center pin 4, the reinforcing fiber-containing molten resin merges inside the cavity 7 to form a weld line in the reinforcing fiber-containing molten resin inside the cavity 7. By moving the outer piece 3 with respect to the center pin 4 in said injection molding die 2, the distance to the center pin 4 is changed and the reinforcing fiber-containing molten resin inside the cavity 7 is forced to flow, disrupting the orientation of the reinforcing fibers in the weld line. As a result, the reinforcing fibers in the weld line and near the weld line in the cylindrical product 1 are intertwined, improving the strength of the portion of the cylindrical product 1 in which the weld line is formed.
Inventors:
TAKI KENJIRO (JP)
Application Number:
PCT/JP2016/054797
Publication Date:
September 01, 2016
Filing Date:
February 19, 2016
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
B29C45/27; B29K105/12; B29L23/00
Foreign References:
| JP2007160683A | 2007-06-28 | |||
| JP2014195941A | 2014-10-16 | |||
| US5637328A | 1997-06-10 | |||
| JP2010059316A | 2010-03-18 | |||
| JPH08127076A | 1996-05-21 | |||
| JP2000167863A | 2000-06-20 | |||
| JPH06226764A | 1994-08-16 |
Attorney, Agent or Firm:
OHNUKI & KOTAKE (JP)
Patent business corporation Onuki smallness Takekuni [Hajime] patent firm (JP)
Patent business corporation Onuki smallness Takekuni [Hajime] patent firm (JP)
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