Design of Vertical Injection Mold with Four⁃layered Hot Runners for Game Machine Handle

doi:10.19491/j.issn.1001-9278.2020.04.016

Abstract

Abstract:

A type of four?layered lamination mold was designed to realize the high efficiency injection production of a game console handle, which could achieve a quadrupling quantity in the mass production for single injection molding on the basis of an ensured molding accuracy of the plastic part. The structure of the four?layered mold was composed of four single?layer molds with the same structure, which were arranged and assembled in a certain spatial sequence, and then a vertical injection?molding machine was adopted for injection molding. A hot runner in a two?plate mold form for opening twice was adopted for the design of single?layer mold structure. The first mold opening was operated for the separation of the hot runner nozzle and the cold runner part of the plastic part, and the second one was operated for the demolding of the plastic part from the cavity insert. In order to solve the problem that the ejecting plate had no power to eject after the single?layered mold was assembled in four layers, a pull rod was symmetrically arranged on the side of the single?layered mold, which could make the opening power transfer into the ejecting force of the ejecting plate in the single?layered mold. Such a design could well solve the problem that the ejecting element of each single?layer mold had no power to eject the plate after the single?layered mold was installed in four layers. The layout of mold structure and the design of driving mechanism are reasonable and can be taken as a good reference for the engineering design.

Key words: four?layered lamination, hot runner, efficiency multiplication, pull rod drive, injection molding

CLC Number:

TQ 360.66

Zijun ZHENG, Guohua XIAO, Zhongliang SHEN, Shaozeng YANG. Design of Vertical Injection Mold with Four⁃layered Hot Runners for Game Machine Handle[J]. China Plastics, 2020, 34(4): 96-101.

Figures/Tables 6

Fig.1. 3D model of the plastic part

Fig.2. Structure analysis of the plastic part

Fig.3. Double shot forming path

Fig.4. Setting of parting and demoulding

Fig.5. Single layer mold structure

Fig.6. Structure of four layer mold

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