FIELD: apparatuses for extruding tubes, mainly tubes of non-ferrous metals by counter-type extrusion.
SUBSTANCE: apparatus includes container with knocking out member, punch coupled with press through stem. Container includes annular turning. Punch has variable cross section with cone widened portion in working part. Cone portion of punch adjoins to stem and it is directed to its side. Punch is embraced by annular turning of container at time moment of extrusion termination and annular variable cross section gap is formed between punch and container. Cross sections of punch stem and of working slit of container are the same.
EFFECT: easy operation of removing sleeve, simplified process of tube making.
2 cl, 2 dwg, 1 ex
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