Pengaruh Posisi Saluran Masuk (In-Gate)Pada Hasil Coran Produk Connecting Rod Dari Bahan Aluminium

A lot of research has been done about the effect of the in-gate, so researchers want to develop pre-existing research by varying the inlets to the left, center and right by testing shrinkage, density, porosity, microstructure, and hardness. The researcher uses sand as a media in the casting process, so this method is commonly called Sand Casting. The test results obtained the largest shrinkage value at the middle in-gate position of 1.42%, followed by the left in-gate position 1.21%, and the smallest shrinkage occurred at the right in-gate position of 1.11%. At the density value obtained the largest density value at the position of the middle in-gate of 3.21 g/ml 3 , then at the position of the left in-gate of 2.48 g/ml 3 , and the lowest density value occurs at the right in-gate position of 2.27 g/ml 3 . In the hardness test using the Brinell hardness test the highest hardness value was obtained at the center ingate position with a value of 79.6 BHN, then the left in-gate channel position was 79.2 BHN, and the smallest value at the right in-gate position was 78.7 BHN. From micro photo testing the results of the greatest hardness were found in the increasingly tightly arranged elements. The difference in in-gate position affects the shrinkage value. The greater the value of shrinkage, the greater the value of its density. Keywords: In-gate, Connecting Rod, Shrinkage, Hardness, Porosity, Density, Microstructure, Sand Casting