Extrusion die for forming a honeycomb structure

Details Extrusion die for forming a honeycomb structure Extrusion die for forming a honeycomb structure

1981-07-10

1983-05-03

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

264177R, 425380, 425465, 425467, B29F 304

Patent

active

043819125

ABSTRACT:
An extrusion die for forming a honeycomb structure comprises a die body provided with a plurality of disconnected feed passageways which are formed from the inlet face thereof, interconnected grid-shaped extrusion slots which are formed from the outlet face thereof so as to be communicated with said feed passageways, and an annular stepped portion formed in the outer peripheral portion of the outlet face thereof, and an annular die mask which covers the stepped portion of the die body below the outlet face of the central unstepped portion of the die body. And between the die mask and a dropped portion formed between the stepped portion and the unstepped portion of the die body, an annular opening portion which opens in the extruding direction is formed.

REFERENCES:
patent: 3983283 (1976-09-01), Bagley
patent: 4075270 (1980-02-01), Cunningham
patent: 4168944 (1979-09-01), Morikawa et al.
patent: 4178145 (1979-12-01), Hamamoto et al.
patent: 4278412 (1981-07-01), Ozaki et al.
patent: 4298328 (1981-11-01), Frost
patent: 4349329 (1982-09-01), Naito et al.

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