Summary of The Project

Blowing extrusion in mould is one of the most widely used techniques for the production hollow plastic product in order to survive in the competitive market and achieve customer satisfaction. Therefore, this project covers the areas of simulation works on blow moulding process to predict the final wall thickness and stress contour occurred at four different parison’s diameter which are 8, 10, 18, 20mm in polypropylene material. The simulation software used is ANSYS Polyflow software. The simulation works focus on five stages which are geometry, meshing, setup, solution, and results process under structuring and solidification of isothermal and transient flow of Newtonian fluid in complex geometries. The thickness and timestep during the blowing process are studied. The results of the investigations reveal that the 8 and 10mm diameter parison has a better contact with the mould cavity while 18 and 20mm parison diameter has a poorest contact. It is because the pressure not enough to blow the parison and the parison diameter not appropriate with the mould cavity. Stress may occur at the bottom of the bottle because at this point the thickness will increase from the wall bottle to accommodate the volume of the bottle. As the conclusion, 10mm diameter of parison is the best selection parison because the parison it is fully contact on the mould cavity and the thickness is relevant to produce in actual bottle. It also can save the time producing and reduce the rate of the material usage.