Abstract: There is inclined wear occurring in the traditional movable mould with a vertically rotating bicolor injection mould structure due to the dead weight of mould, leading to the malfunction of the mould. Aiming at this problem, a horizontal rotating disk bicolor injection mould was designed. a bicolor hot runner plastic mould was designed by analyzing the structure characteristics of products and the molding process of automobile windshield decorative strip. Furthermore, a core-pulling mechanism with inclined wedge spring side was designed by combining with the structure characteristics of the bicolor mould. Such a design relied on the gap on the inclined guide pillar to realize no action of the side core-pulling for the hard rubber injection and immediate action of the side core-pulling for the soft rubber injection, and therefore the high dimension accuracy for products was ensured. Based on the practical production with this opposite-type injection mould, the structural design of this mould was reasonable to meet the requirements for production process and obtain better economic benefits accordingly.

Key words: automobile windshield decorative strip, opposite type, bicolor injection mould