Abstract
The paper begins with discussion of some of the considerations involved in the design of systems of this type and highlights the major problems encountered. Attention is confined to what can be called discrete hydrostatic extrusion as opposed to semi-continuous hydrostatic extrusion. Then follows a description of some of the specific problems in detail—the problem of pressure vessel design is not discussed.
The first problem mentioned is the important one of control. The mechanics of stick-slip instability are outlined theoretically and various proposals for eliminating or minimizing it are put forward.
Their ram stability is discussed and possible solutions to the problem are put forward of which one is chosen as the most attractive practical solution. The results of a simple theoretical analysis are discussed and the theoretical results are compared with experimental evidence.
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