Design of Large Precision Injection Mold for Rearview Mirror Base of Automobile

doi:10.19491/j.issn.1001-9278.2020.06.014

Abstract

Abstract:

Aiming at the structural characteristics of the rearview mirror base of automobile as well as the problems occurring in their molding process, an optimization design was carried out for the mold structure. The problem of warpage deformation after plastic forming was solved with a pre?deformation technology. A reasonable and advanced pouring system was determined through the use of mold flow analysis, and the demolding problem was also solved by use of fixed?mode tunnel core, moving mode oblique core and the delayed pulling of diagonal push rod. By using a mesh format and a tilting cooling channel, the molding cycle was shortened from 35 s to 30 s.

Key words: rearview mirror base of automobile, injection mold, pre?deformation technology, molding analysis, delayed pulling of diagonal push rod

CLC Number:

TQ 320.66⁺2

Fangfang LIU, Weihe ZHANG. Design of Large Precision Injection Mold for Rearview Mirror Base of Automobile[J]. China Plastics, 2020, 34(6): 87-91.

Figures/Tables 10

Fig.1. The rearview mirror base of automobiles

Fig.2. Pre?deformation technology

Fig.3. The gating system of molds

Fig.4. The mold flow analysis

Fig.5. The injection mold stracture of the rearview mirror base of automobiles

Fig.6. The mold positioning system

Fig.7. Stereogram of mold

Fig.8. The side core?pulling mechanism

Fig.9. The fixed distance division mechanism

Fig.10. Temperature control system

References 8

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