Design and Make Propellers of Fishing Vessels

摘要

Product design is a very significant determining factor, imperfections of a production result can be caused by designs that do not meet the design specifications. All manufacturing processes begin with a product planning or design. This study aims to design and make propellers for fishing vessels. Based on the results of research on fishing boat propeller design using mechanical design software for making pattern, coup and drag drawings. Fish boat propeller casting, using the sand mold method has parameters namely the pattern used is a hemisphere type pattern, the pattern in the middle is made of aluminum alloy. There are also rat tail defects or excess liquid aluminum material at the surface of the coup and drag joints as well as air cavity defects at the joints of the risers and spool products caused by oxidation or air bubbles that evaporate from the hot aluminum liquid process at the time of pouring.