Design of Injection Mould with Multi-directional Side Core Pulling for Thin Wall Plastic Parts of Automobile Lamp Frame
Fei Xiaoyu, Zheng Wei
Tianjin Vocational Institute, Tianjin 300410, China
Abstract：Taking thin wall plastic parts of automobile lamp frame as an example, according to the structural characteristics of the parts, such as large size, relatively large quantities of multi-directional buckles and arc-shaped structure, a set of injection mould with complex multi-directional side core pulling for open-ended hot runner molding was designed. Inner and outer simultaneous side core-pulling mechanisms were used to solve the problem of difficult demoulding in multi-directional buckles position. By adopting "angled ejector+ejector block+ejector pin" combined demoulding mechanism, the problem of easy to produce the ejection mark and the deformation was solved when thin wall parts was pushed out. The problem of uniform cooling of arc-shaped structural parts was solved by adopting 7 groups of conformal cooling water circuit. The mould structure is compact and the design is reasonable, the molding cycle is shorten, which ensures the stability of the mould working in actual production, the dimensional accuracy of the molded plastic parts can meet the precision requirement.
Keywords：automobile thin wall plastic part; hot runner system; conformal cooling water circuit; side core-pulling mechanism; angled ejector demoulding mechanism
Fei Xiaoyu，Zheng Wei. Design of injection mould with multi-directional side core pulling for thin wall plastic parts of automobile lamp frame[J]. Engineering Plastics Application，2020，48(10)：80-85.