Extrusion apparatus for ceramic honeycomb articles
AssigneeCorning Incorporated
InventorsNancy A. Golomb, Christopher J. Malarkey
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Abstract
An improvement in a process of making honeycomb articles, which process utilizes a co-rotating, intermeshing twin screw extrusion apparatus to mix, screen, and extrude a batch of ceramic materials through a die, the improvement which comprises the steps of separating the mixing and screening phase from the extrusion phase, by passing the batch through a first co-rotating, intermeshing twin screw extruder or a mixer extruder to mix and screen the batch, and then directly passing the mixed and screened batch through a second co-rotating, intermeshing twin screw extruder or a pumping extruder to extrude said batch through a die assembly to produce a honeycomb article.
Claims10
An apparatus for extruding a ceramic honeycomb article comprising:
- a first co-rotating, intermeshing twin screw extruder for mixing and screening a batch of ceramic material, said first twin screw extrusion apparatus comprising a first feed inlet at one end, a first discharge outlet at the other end, and a filtering screen detachably mounted adjacent said first discharge outlet;
- a second co-rotating, intermeshing twin screw extruder downstream from said first twin screw extruder for extruding said batch through a die assembly, said second twin screw extruder comprising a second feed inlet at one end corresponding to said first discharge outlet of said first twin screw extruder and a second discharge outlet at the other end;
- means for linking said first co-rotating, intermeshing twin screw extruder to said second co-rotating, intermeshing twin screw extruder;
- a die assembly attached to said second discharge outlet of said second twin screw extruder for producing a honeycomb article.
Dependencies are inferred from the claim text.