Designing of Multi-cavity Extrusion Die to Increase Productivity: A survey and perspective

Abstract

Extruded rubber is used extensively in many applications and products, either alone or in combination with other materials. It is often desirable to find the best possible way to maximize the production output with least possible capital input and changes in existing plant layout. The changes that are permitted are in the department of pre-processing that is designing stage and machine selection. The proper design of an extrusion die is extremely important to achieve the desired shape and accurate dimensions of the extruded product also to ensure that production level will produce maximum profit and lead minimum cost. The increase in productivity can be defined as the effectiveness of productive effort, especially in industry, as measured in terms of the rate of output per unit of input. Here the productivity is considering the re-designing of single cavity die to multi-cavity die, the die is a metal block that is used for forming materials like sheet metal, plastic, rubber, etc. The scope of current study takes into consideration of re-designing the most commonly used design of rubber extrusion die with a single cavity and would evaluate the effect of introducing the design of double cavity design on the overall increase in productivity of the industry. After redesigning the die for rubber extrusion moulding we would compare the statistical data of existing output data for productivity and hence the other changes required to keep up the increased productivity rate.