This paper introduces race car ashtray covered plastic injection mold design process. Ashtray covered by the analysis of the program completed the design of mold, including the choice of sub-shot machine, determine the location of surface, to determine the number of cavity, the choice of gate. Detailed design of the mold pieces of molding, Plastic extrusion bodies, the side core pulling bodies, cast system and cooling system, core and core-pulling, as well as the form of the choice of mold, and the main parts, such as cavity size, convexity Die size for the intensity calibration. Among them, the side core pulling, as well as core pulling the slider design of the difficult times. Ashtray cover as a result of the two side holes, the general release core can not be completed, which requires calculation of the side core-pulling mechanism, side draw and the slider guide the design of columns is one of the focus; ashtray baffle the back cover impede the normal release, so the use of a sliding core, it will resolve the release of the obstruction, and can top out of plastic parts. Calculated through the mechanical analysis and oblique derivative such as columns and the size of the slider to solve the difficulties of this design.
Key words: Design of plastic injecting mould ；Surface; Core
