Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent
1980-05-12
1982-03-23
Anderson, Philip
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Extrusion shaping means
228175, 425463, 425466, 425467, B28B 326
Patent
active
043210252
ABSTRACT:
Disclosed is an extrusion die for use in forming extruded honeycomb structures employing a face plate having a plurality of discharge slots and a back plate having a plurality of feed passageways. The face plate and the back plate are joined to one another by means of bonding, e.g. brazing, at the joint formed by abutting surfaces of the plates. Proper orientation between the face plate and the back plate are maintained during brazing such that the feed passageways and discharge slots remain properly associated by means of a plurality of alignment cavities having walls opening to and diverging toward and to the joint between the face plate and back plate. Pedestals project across the joint and mate with the alignment cavities such that movement between the back plate and face plate is permitted during the thermal expansion caused by brazing only in the direction perpendicular to the joint, thus assuring proper registry between feed holes and discharge slots which precludes failure of the brazed joint during extrusion.
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patent: 4118456 (1978-10-01), Blanding et al.
Anderson Philip
Corning Glass Works
Wardell Richard N.
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