This thesis established To study the design and process of rubber mold joint to study the percentage of การหดตัว coordinates and tolerance in mold design products, natural rubber. 50 Shore A hardness.60 Shore A, important problems found in the use of molded rubber products. Is a contraction of rubber products in forming does not meet the size design. The students of the importance of the project is to create the mold rubber products.Study on the theory of use. In the design and the process of molded rubber products. Study on Design for rubber products. Introduction to theory in design of mould for rubber products. Conditions.Application of computer in industry (CAD / CAE / CAM) properties of the rubber and statistical data
.In this experiment, the hundreds of shrinkage of natural rubber (NR) 50 Shore A hardness and 60 shore a unequal, in case hardness will shrink less contrast with little strength to shrink.Coordinates and tolerance of parts that must use the proper coordinates tolerance in each shape and size
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