Optimization of cooling system and mold design for automobile saddle cover panel

doi:10.19491/j.issn.1001-9278.2023.12.016

Abstract

Abstract:

Moldflow software was used to simulate the injection process. The influences of the traditional cooling channel design and conformal cooling channel design of the mold cooling system on the cooling of product formation was compared and analyzed. The maximum temperature difference of the conformal cooling channel design between the product center and both sides was controlled within 4 ℃， which reduced the jacking cooling time by 17% and the total deformation by 38.61% compared to that of the traditional cooling channel design. This resulted in the optimal cooling uniformity of the mold with a conformal cooling channel. A hot runner injection mold of the conformal cooling channel was designed by using a inside and outside slider mechanism， an angle pin core⁃pulling mechanism， a lifter mechanism， and an “ejector pins pushing+ejector block pushing” mechanism. This design made the product released smoothly. The mold design was advanced， and the latch⁃style mechanism realized the order opening of two⁃plate injection mold， which could ensure the reliability of mold operation.

Key words: saddle cover panel of car, injection molding, cooling system, hot runner, mold design

CLC Number:

TQ320.66⁺2

CAI Houdao, LI Guijin, CHEN Yun. Optimization of cooling system and mold design for automobile saddle cover panel[J]. China Plastics, 2023, 37(12): 109-114.

Figures/Tables 11

Fig.1. Structure of saddle cover panels of cars

Fig.2. Structure of molded components

Fig.3. Runner system

Fig.4. Traditional cooling channel design

Fig.5. The form cooling waterway

Fig.6. Conformal cooling channel design

Fig.7. The temperature curve based on conformal cooling channel design

Fig.8. The jacking cooling time

冷却系统

X方向/

Y方向/

Z方向/

总变形/

Tab.1. Comparison of warping deformation by different cooling channel designs

Fig.9. Warping in the Y direction

Fig.10. Injection mold structure

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