Title:
MANUFACTURING METHOD FOR DIE
Document Type and Number:
WIPO Patent Application WO/2011/158700
Kind Code:
A1
Abstract:
Provided is a method of manufacturing a die for the manufacture of molded products that prevents burr formation and sufficiently promotes surface crystallization, by setting die temperature at no more than Tc
2 – 100°C when molding a crystalline thermoplastic resin. The temperature at which the crystallization speed of the resin filled into the die will be sufficiently fast in the vicinity of the surface of the die so that the degree of crystallization at the surface of the molded article will fall within a determined range, and the sustain period during which the temperature is sustained at or above the temperature at which the crystallization speed of the crystalline thermoplastic resin in the die is sufficiently fast are determined on the basis of the relationship between the crystallization speed and resin temperature of the crystalline thermoplastic resin, and the die is provided with a heat insulating layer so that when the die temperature is Tc
2 – 100°C, the period during which the temperature in the vicinity of the surface of the die is not lower than the determined temperature conforms to the determined sustain period.
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Inventors:
TAKASHIMA, Masato (973, Miyajima, Fuji-sh, Shizuoka 33, 〒4168533, JP)
高嶋 正人 (〒33 静岡県富士市宮島９７３番地 ポリプラスチックス株式会社内 Shizuoka, 〒4168533, JP)
MIYASHITA, Takayuki (973, Miyajima, Fuji-sh, Shizuoka 33, 〒4168533, JP)
高嶋 正人 (〒33 静岡県富士市宮島９７３番地 ポリプラスチックス株式会社内 Shizuoka, 〒4168533, JP)
MIYASHITA, Takayuki (973, Miyajima, Fuji-sh, Shizuoka 33, 〒4168533, JP)
Application Number:
JP2011/063072
Publication Date:
December 22, 2011
Filing Date:
June 07, 2011
Export Citation:
Assignee:
Polyplastics Co., Ltd. (2-18-1, Konan Minato-k, Tokyo 80, 〒1088280, JP)
ポリプラスチックス株式会社 (〒80 東京都港区港南二丁目１８番１号 Tokyo, 〒1088280, JP)
TAKASHIMA, Masato (973, Miyajima, Fuji-sh, Shizuoka 33, 〒4168533, JP)
高嶋 正人 (〒33 静岡県富士市宮島９７３番地 ポリプラスチックス株式会社内 Shizuoka, 〒4168533, JP)
ポリプラスチックス株式会社 (〒80 東京都港区港南二丁目１８番１号 Tokyo, 〒1088280, JP)
TAKASHIMA, Masato (973, Miyajima, Fuji-sh, Shizuoka 33, 〒4168533, JP)
高嶋 正人 (〒33 静岡県富士市宮島９７３番地 ポリプラスチックス株式会社内 Shizuoka, 〒4168533, JP)
International Classes:
B29C33/02; B29C45/73; B29C45/78
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (Sapia Tower, 1-7-12 Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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Claims: