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US 2012/0126444 A1Published application
Extrusion-molding machine and extrusion-molding method
AssigneeIbiden Co., Ltd.
InventorsNorihiko YAMAMURA, Kazuya NARUSE, Eiji SUMIYA, Kosei TAJIMA
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Abstract
An extrusion-molding machine includes a screw, a die and a high-hardness coat layer. The screw has a blade portion to extrude a molding material. The screw is disposed in a tightly-closed space which is maintained in a reduced-pressure atmosphere. The die molds an extruded molding material. The high-hardness coat layer is provided at least on the blade portion.
Claims26
An extrusion-molding machine comprising:
- a screw having a blade portion to extrude a molding material, the screw being disposed in a tightly-closed space which is maintained in a reduced-pressure atmosphere;
- a die to mold an extruded molding material;
- and
- a high-hardness coat layer provided at least on the blade portion.
1 more element
An extrusion-molding method comprising:
- mixing a wet mixture containing inorganic powder serving as a molding material;
- continuously extruding said wet mixture through a die of an extrusion-molding machine including a screw having a blade portion to extrude the molding material, the die being placed at an outlet of a tightly-closed space in which screw is disposed;
- maintaining a reduced-pressure atmosphere in said space;
- and
- providing a high-hardness coat layer at least on said blade portion.
2 more elements
Dependencies are inferred from the claim text.