Design and Analysis of Plastic Moulding Die and Runner Shape Optimization by Using Analytical Hierarchy Process

Production Engineering

The designing of mold is a complicated process. In mold designing various parameters are to be adjusted for successful mold design. Here I use the CAD software to design the mold and to analysis of various parameters for design of mold. The CAD software’s use are CREO 2.0 and ANSYS. Here I design the molds by using both analytical and software methods for different parameters. The main failure modes of the plastic mold surface wear, deformation and fracture. The crash reasons depend on working conditions, mold materials and thermal properties, stresses due to ingates etc. Material assortment of plastic mold is resolute by their using performances and life of material. By analytic calculations of gate types, gate size, sprue, runners, margin of clamping holes and all other parameters and locations in mold plate. The analysis of mold we can suggest a proper material selection, size, and optimizing the shape of the ingate or runner and the position of the runner. The runner provides the liquid material to the mold but the runner is cut over the die so it produces the stresses in the die if the stress produce is more than the material properties of the die then the failure of the die is occurs. To avoid the collapse of shape of the runner and the position of the runner is to be selected properly so the stress is minimizes and the crash of the die is avoided and the stress can be minimized. Here we use the analytical hierarchy process of the optimization of the runner cross section. We take the ANSYS results and apply this technique on it so that i get the optimum cross section for the runner and we take that runner cross section and design the moulding die, past deceitful the moulding, create the die on CNC machine.

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