Design of injection mold with complex core pulling and conformal cooling channel for smart kettle shell

doi:10.19491/j.issn.1001-9278.2022.06.021

Abstract

Abstract:

Based on the structural characteristics and technical requirements of the smart kettle shell， an injection mold with a complex core?pulling mechanism and a conformal cooling channel was designed. The structure of this injection mold with a large wrapping force and difficult demoulding modes was improved effectively by using a sequential lateral core?pulling mechanism and a delayed lateral core?pulling mechanism in the mold. The problems in the temperature control system， including a great amount of heat from the melt， a large temperature difference in the formed parts， and a high mold temperature， were solved using the 3D?printing conformal cooling channels. The temperature difference of the mold was reduced by 50 %， the injection molding cycle was shortened by about 20 %， the deformation of the plastic part was reduced by 75 %， and the dimensional accuracy was improved by two levels， reaching the MT3 grade （GB/T 14486—2008）. A one?time success was achieved for the injection?molding test. The appearance quality and dimensional accuracy of the injection?molded parts could meet the requirement of design， confirming that the mold structure was advanced and innovative.

Key words: smart kettle shell, injection mold, sequential lateral core?pulling, delayed lateral core?pulling, conformal cooling channels

CLC Number:

TQ320.66⁺2

XU Yonglin, ZHANG Weihe, FENG Guoshu, SONG Dongyang, DU Hai, WANG Jing, WEI Haitao. Design of injection mold with complex core pulling and conformal cooling channel for smart kettle shell[J]. China Plastics, 2022, 36(6): 137-141.

Figures/Tables 5

Fig.1. Smart kettle shell

Fig.2. Gating system of the mold

Fig.3. Injection mold stracture of the smart kettle shell

Fig.4. Delayed lateral core?pulling mechanism

Fig.5. Cooling system of the injection mold

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