Title:
合成樹脂製耐熱容器の二軸延伸ブロー成形用プリフォーム
Document Type and Number:
Japanese Patent JP6776844
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a preform for biaxial drawing blow molding of a synthetic resin heat-resistant container which is designed to improve shock resistance of a neck ring formed at a lower end of a thermally crystallized opening so as to prevent the neck ring from missing.SOLUTION: A connection part 5 is formed along a circumferential direction between a neck ring 22 and a trunk 3. The connection part 5 continuously extends smoothly from a lower surface of the neck ring 22 toward the trunk 3 while curving downward to an upper end of the trunk 3. In a vertical cross section passing through an axis of a preform 1, an upper end side of an outer peripheral surface of the connection part 5 is formed into a circular arc shape having a radius of curvature of 0.7-2.0 mm which is smoothly continuous with the lower surface of the neck ring 22.SELECTED DRAWING: Figure 2
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Inventors:
Tamanari Tajima
Noriaki Hikichi
Seito Hiromitsu
Noriaki Hikichi
Seito Hiromitsu
Application Number:
JP2016227272A
Publication Date:
October 28, 2020
Filing Date:
November 22, 2016
Export Citation:
Assignee:
Toyo Seikan Co., Ltd.
International Classes:
B29C49/02; B29B11/14; B29C49/06; B29C49/08
Domestic Patent References:
| JP2016013664A | ||||
| JP11235751A | ||||
| JP2012254819A | ||||
| JP2016529142A | ||||
| JP2004009633A | ||||
| JP62018215A |
Attorney, Agent or Firm:
Heiwa International Patent Office