精选优质文档-倾情为你奉上AbstractThis design needing the thickness of plastic uniform, the surface should be smooth .Considering the size of product is large, so the design uses one-mode and one-cavity form in this case. The design also use half-structure to forming the handle of product after analyzing the structure of the product. In order to ensuring the surface smooth, the edge without distortion, we use pneumatic ejection structure. This structure also simplifies the mold structure, economical