Pengaruh variasi laju aliran dan preheating cetakan pada investment casting terhadap sifat fisis dan mekanis prototipe aluminium cylinder head engine

This research studies the effect of flow rate on pouring molten metal into mould so that can be controlled. Furthermore, this preheating temperature inside cavity maintained, especially for narrow holes. The process starts with making engine cylinder head pattern and gating system using a three-dimensional printer polylactic acid resin. are combined coated layer cement plaster, silica sand kaolin. After coating is dry, heated until evaporates there no residue. casting was carried out at pre-heating moulds 300 0C 350 800 speeds 20, 30, 40 rpm. final stage manufacturing test objects testing mechanical properties. results showed higher speed, less perfect results, in fins. best occurred pre-heat condition speed 20 rpm, Maximum Tensile Strength 105 N/mm2, Hardness 53 hardness Brinell (HBN), Density Porosity 2.43 gr/cm3. material used study refers to reference A356 Aluminum Alloy.