Dies for extruding honeycomb structure

Details Dies for extruding honeycomb structure Dies for extruding honeycomb structure

1987-08-11

1989-05-16

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Plural distinct feed inlets

29428, 291636, 26417712, 425464, B29C 4730

Patent

active

048305987

ABSTRACT:
Dies for extruding honeycomb structures are disclosed, which comprise wear resistant alloy plates, a die base body having a coefficient of thermal expansion different from that of the wear resistant alloy plates, forming channels having a sectional shape conforming to that of honeycomb structural bodies to be extruded and a given depth from a front face of the die toward a rear face thereof, and a plurality of opening holes indepndently formed from the die rear face toward the die front face and communicating with the forming channels. The die base body and the wear resistant alloy plates are bonded together such that the forming channels may communicate with the opening holes. A method for producing such dies is also disclosed, which is characterized in that slits are preliminarily formed in one of machined faces of the die base before the wear resistive alloy plates are bonded to the die base portion, and are located at a predetermined width in an arrangement conforming to the forming channels.

REFERENCES:
patent: 3790654 (1974-02-01), Bagley
patent: 4354820 (1982-10-01), Yamamoto et al.
patent: 4373895 (1983-02-01), Yamamoto et al.
patent: 4378964 (1983-04-01), Wolfe, Jr.
patent: 4653996 (1987-03-01), Ozaki et al.

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