SCALE UP RULES FOR PROFILE GEOMETRIES IN EXTRUSION DIES AND OPTIONS TO ADJUST SURROUNDING FLOW CHANNELS TO AVOID TRANSVERSE FLOW

摘要

The design of extrusion dies is frequently based on knowledge and experience of the designers. One very simple, rapid and low-cost means of designing a profile die is the use of scale-up rules. This paper deals with an approach to develop scale-up rules which make it possible to scale-up or scale-down existing profile geometries by means of simple equations. The following profiles are observed: rectangular channel, annular gap and pipe channel. Allowance is also made for a change in material properties in order to achieve the greatest possible variability in the die design. Neighboring areas are examined and revised by iterative procedures to avoid transverse flow between the flow channels.