Refrigerator Shell Mold Flow Analysis And Research Of Mold Technology

At present, with the development of plastics industry, the application of plastics have extended larger and larger, specially in the sphere of industry and ordinary product。But injection molding often results many product problems such as short shots,weld line,warp,dimension error and so on。How to decrease the plastics warp is a puzzle for engineer specially to the thin-wall and large-size product。If injection mold is designed only by experience on gating and cooling system。Usually it is not optimized and contain guessing besides factors, this design will have to be done again, which may be a long and reduplicative progress and possibly the best result can no be got。In this paper, firstly provides the technology of mold design and manufacture to the large-size and precise injection molding。Describes the generation mechanism of warpage and analyze the factors that affect the warpage based on theory of flowing of the polymer。On this foundation, taking a thin-walled refrigerator shell part for example, when use mold CAE software Moldflow, simulat about the filling,packing,clamp force,residental stress,weld line,warp and so on。Through comparing simulating result to the different of gating system, then get the best gating system scheme。To solve the warpage problem of the refrigerator shell in mold trial, arrange the simulation according to orthogonal experiment theory, the L18 orthogonal experiment table is designed, the warpge data are obtained under different molding conditions (mold temperature,melt temperature,injection time,packing pressure,packing time,cooling time), and obtain the optimum set of factors。Then use this optimum set of facrors, the result show the optimum set of factors can be effectively reduce the warpage oAfter define the injection process and the whole structure of the mold, through using the molding module,mold design and the drawing module of the software Pro/E realize the 3D mold design。Finally to finish the mold design of the refrigerator shell。Through using the CAD/CAE technology in design of injection mold specially the thin wall and large size injection mold。We can improve the quality of the product and productivity effect。...