Combination die assembly and a method of extrusion using the...

Details Combination die assembly and a method of extrusion using the... Combination die assembly and a method of extrusion using the...

B - Operations, Transporting

21

C

B21C 23/21 (2006.01) B21C 25/00 (2006.01)

Patent

CA 2090252

The combination die assembly comprises male die which is composed of a core 12 formed with at least one opening 16 piecing the body portion of the core, a stopping pin 13 having its side ends 13a protruding from the opening, and a mold 14 for holding the core 12. The mold 14 is formed with a core-holding aperture 21 having inside shoul- ders which bear the side ends 13a of the pin 13, so that the core 12 is easily manufactured, any undesirable stress concentration onto the member for support of the core is avoided, and the reliability in mechanical strength of the core is improved.

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