Design of complicated core pulling injection mold for left/right cover of car air tank

doi:10.19491/j.issn.1001-9278.2024.01.016

Abstract

Abstract:

According to the structural characteristics and technical requirements of the left/right cover car air tank， a large injection mold with a complex core⁃pulling mechanism was designed. The labor productivity increased by 10 %， and the dimensional accuracy reached MT3（GB/T 14486—2008） through using a hot runner⁃gating system and a fast and balanced cooling system. The problem in the ejection system with a complex structure and multiple back buckles was solved by using composite core pulling and delayed core pulling. The accuracy and lifespan of the mold were greatly improved by using a guidance and positioning system with a standard ball⁃guide sleeve.

Key words: left/right cover of car air tank, large injection mold, side core pulling mechanism, compound core pulling, time?delay core pulling, hot runner gating system

CLC Number:

TQ320.66⁺2

FEI Qiang, ZHANG Weihe. Design of complicated core pulling injection mold for left/right cover of car air tank[J]. China Plastics, 2024, 38(1): 112-116.

Figures/Tables 7

Fig.1. The car airtank left/right cover

Fig.2. The hot runner gating system

Fig.3. The side core pulling mechanism of the injection mold for the car airtank left cover

Fig.4. The side core pulling mechanism of injection mold for the car airtank right cover

Fig.5. The cooling system of the injection mold

Fig.6. The 3D schematic diagram of the cooling system

Fig.7. The injection mold schematic of the car airtank L/R cover

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