Structural design of plastic mold for automotive seat headrest

doi:10.19491/j.issn.1001-9278.2024.10.018

Abstract

Abstract:

This paper reported a plastic mold structure design for a certain model of car seat headrest. A design scheme was proposed for a composite mold structure through analyzing the forming process， demolding mechanism， mold flow， etc. Meanwhile， the Haff position， dovetail large inclined top， inclined inner top， and straight top core pulling was combined to solve the technical challenges in product iterative manufacturing. Through the verification by flow analysis， this design scheme can successfully prevent against the defects occurring in molds and products. The verification results of actual production demonstrated that this design scheme effectively shortened the product development cycle and improved the efficiency and quality of mold manufacturing.

Key words: analysis of forming process, demolding mechanism, model flow analysis, mold structure design

CLC Number:

TQ320.66

YE Weiwen, CHEN Zhensen, JIANG Bingchun, FENG Jing. Structural design of plastic mold for automotive seat headrest[J]. China Plastics, 2024, 38(10): 97-102.

Figures/Tables 16

Fig.1. Seat headrest

Fig.2. Parting surface

Fig.3. Product parting line

Fig.4. Haff slider mold opening motion state

Fig.5. Structural diagram of inclined top ejection and top block

Fig.6. Heat dissipation system

Fig.7. V/P conversion and pressure distribution

Fig.8. Distribution of flow front

Fig.9. Air hole distribution map

Fig.10. Distribution diagram of the fusion line

Fig.11. Distribution of cooling temperature in the circuit

Fig.12. Flow rate distribution diagram

Fig.13. Temperature distribution diagram of the mold

Fig.14. Deformation data of seat headrest from Moldflow in X， Y and Z directions

Fig.15. 2D structure diagram of the mold

Fig.16. Product diagram of car seat headrests

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