Die assembly for extruding hollow articles

Details Die assembly for extruding hollow articles Die assembly for extruding hollow articles

B - Operations, Transporting

21

C

B21C 25/02 (2006.01) B30B 15/02 (2006.01)

Patent

CA 2138706

A male die (2) is composed of an annular base (7), a bridge (8) and a forming lug (9), and a female die (3) tightly fits in the annular base (7) of the corresponding male die (2). A distance between a forming slit (28) and a location where the male die (2) engages with the female die (3) is decreased such that the misalignment of the forming lug (9) with a forming hole (26) is prevented from occurring during an extrusion process. The male die in combination of the female die enables the production of hollow articles of a high dimensional precision free of any unevenness in wall thickness.

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