Title:
INJECTION MOLDING OF PP PLASTIC SPRING
Document Type and Number:
Japanese Patent JP2021088167
Kind Code:
A
Abstract:
To provide a technology for improving efficiency of injection molding of a PP plastic spring.SOLUTION: There is provided a technology for injection molding of a PP plastic spring, comprising: including a base 10; fixedly installing a plastic injection molding frame 12 on an upper end surface of the base through supporting columns which are symmetrically arranged; arranging a molding cavity 13 in the plastic injection molding frame; constituting an injection molding cavity of the spring by an outer mold 18 to be separable and symmetric, and four inner molds 31 arranged in circular shapes; quickly molding the spring by a cooling device 85 when the plastic is poured into a mold; disengaging the outer mold and the inner molds from the spring, respectively, when the mold is released; increasing a mold-releasing speed of the spring itself because centrifugal force is generated when an operation block 21 drives and rotates the spring; and improving the efficiency of injection molding work of the spring without damaging the spring.SELECTED DRAWING: Figure 1
Inventors:
ZHENG JIEKAI
Application Number:
JP2020074987A
Publication Date:
June 10, 2021
Filing Date:
April 20, 2020
Export Citation:
Assignee:
WU GANG
International Classes:
B29C45/66; B29C33/02; B29C45/03; B29C45/40
Attorney, Agent or Firm:
Kazuhisa Iwanaga