Hollow die and an apparatus for continuous extrusion forming of

Details Hollow die and an apparatus for continuous extrusion forming of Hollow die and an apparatus for continuous extrusion forming of

1995-03-24

1997-01-21

Crane, Daniel C.

Metal deforming

By extruding through orifice

By rotating impeller means

72269, B21C 2300

Patent

active

055950841

ABSTRACT:
A hollow die (5) for extruding elongate hollow articles has a thick cylindrical body (15), whose cavity (23) extends in the axial direction of the die. This cavity receives and holds a core (7), a female member (21) and other necessary parts in alignment with each other in the axial direction. The hollow die is thus of such a high rigidity that higher extrusion rates will not cause any intolerable distortion or the like deformation in the die, thereby enhancing the productivity and the dimensional precision of the extrudates. The hollow die is particularly adapted for use with the continuous extrusion forming apparatuses.

REFERENCES:
patent: 4313327 (1982-02-01), O'Connor
patent: 4598567 (1986-07-01), Backus
patent: 4829802 (1989-05-01), Baumann
patent: 5131253 (1992-07-01), Hopkins
patent: 5152163 (1992-10-01), Hawkes et al.

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