Numerical Simulation And Process Study Of Shell Injection Molding

Injection molding can be high.volume continuous production the complex shape, contour clear, thin wall and deep cavity injection molding, The advantages of injection molding parts of thin, lightweight, high precision and high efficiency is shown, no other process can comparison. But in the traditional injection molding production, improving the process parameters can only rely on experience to judge, lack of scientific theoretical guidance. Use of computer simulation software, for casting production in the filling and solidification process simulation Numerical, predict fill state castings, Solidification sequence, the location and size of internal defects in casting, get the best casting process parameters. Provides the theoretical basis for improving the process parameters, improve casting yield, enhance the enterprise competitive ability in the market.Injection moldings of this research, is a shell by one of Shenyang injection molding factory production, its structure is more complex, a plurality of holes and grooves, its production is difficult.Using Moldflow to simulate the process of filling, packing and predict the shrinkage and the warpage. Orthogonal test were used for numerical simulation, obtain the temperature field and flow field change rule. Combined with the location and size of casting shrinkage cavity, shrinkage porosity, optimize the best technological process parameters for: melt temperature 275℃, mold temperature 70℃, inject time 1.5s, and design packing program more suitable for molding. Injection molding under the process parameters, finally acquire the product of demand qualify through production verification and quality optimization referring to the experiments of production.Numerical simulation of the counting machine accuracy is evidenced by injection molding experiments. The practical difficulties were solved in the production of shell injection moldings. The quality of the products has been improved; also improve the economic benefit and social benefit for the enterprise.