Papers by Keyword: Rubber Mold

Abstract: Spark deposition technology is a kind of important means on rubber mold surface strengthening and repair .The temperature field for 2A12 Aluminum Alloy during EDM surface strengthening is simulated and analyzed through establishing proper finite element model based on finite element software. The results show that: During the strengthening, temperature field is mainly concentrated on the surface of work-piece and has little influence on the internal of work-piece. The temperature field of the surface of work-piece has the dynamic effects, which moves with the movement of the strengthening point and becomes stable as time passes. During the strengthening, the temperature for nodes on the surface decreases slowly after rising rapidly, and the strengthening point has the highest temperature. The barrier of the insulated boundary has a great influence on the distribution of temperature.

Abstract: This article primarily analyzes the shortcoming in the current formula of plastic and rubber mold shaped dimensions in practical， and fully considered the influence of plastic and rubber contracting fluctuation ratio on the accuracy of the plastic and rubber dimensions. As the introduction of δX sources from mold designers’ estimating error on plastic and rubber contracting ratio or the uncertainty of contracting ratio fluctuation, know that the actual contracting ratio of plastic and rubber fluctuates around the average plastic and rubber contracting ratio. Therefore, the remained measure of repairing mold is the function of plastic and rubber products dimension error δS’ and δS, caused by plastic and rubber contracting ratio estimating error and contracting ratio fluctuation respectively. Based on the probability theory, a comparatively scientific method in calculating the remained measure of repairing mold is proposed. This method exceeds all other Calculating Methods increase design success rate use in Green Product Design.

Abstract: Dry-bag CIP process has become a very popular method in the large volume production of powder compacts in the P/M and ceramic industries. Intensive technological research on the Drybag equipment has been carried out to improve the dimensional accuracy and the productivity. In this study, the rubber mold design technology with FEM simulation during pressing has been introduced, in order to achieve higher dimensional preciseness, and criteria for the selection of Drybag equipment, namely the In-line type or Off-line type, have been established based on the powder flowability index proposed by Carr. Based on these research results, high productivity Off-line Drybag CIP equipment, which can realize good dimensional accuracy with high productivity, was developed even for non granulated powders with poor packing density. This paper describes the research results and the present status of the most advanced Off-line Dry-bag CIP equipment technologies.