Member for producing castings

• US 20060130987A1
• Filed: 11/11/2003
• Published: 06/22/2006
• Est. Priority Date: 11/13/2002
• Status: Active Grant

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Nakai, Shigeo, Kobayashi, Hiroaki, Takagi, Yoshimasa, Sono, Tokihito, Tsuura, Tokuo
• Granted Patent: US 7,503,999 B2
• Time in Patent Office: Days
• US Class Current: 162/118
• CPC Class Codes: B22C 9/082 Sprues, pouring cups
• CPC Class Codes: Y10T 428/1303 Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
• CPC Class Codes: Y10T 428/1314 Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound [e.g., fiber glass, mineral fiber, sand, etc.]
• CPC Class Codes: Y10T 428/1321 Polymer or resin containing [i.e., natural or synthetic]

Abstract

A part for casting obtained by converting base paper for paper tubing into a tube and containing an organic fiber, an inorganic fiber, and a binder. The part is preferably obtained by winding the base paper into tubing. The part preferably contains 10 to 70 parts by weight of the organic fiber, 1 to 80 parts by weight of the inorganic fiber, 10 to 85 parts by weight of the binder. The organic fiber is preferably pulp fiber.

Claims

1. A part for casting comprising base paper for paper tubing and containing an organic fiber, an inorganic fiber, and a binder, the base paper being converted into a tube.

2. The part for casting according to claim 1, wherein the base paper for paper tubing is wound into a tube.

3. The part for casting according to claim 1, comprising 10 to 70 parts by weight of the organic fiber, 1 to 80 parts by weight of the inorganic fiber, and 10 to 85 parts by weight of the binder, the total weight of the organic fiber, the inorganic fiber, and the binder being taken as 100 parts by weight.

4. The part for casting according to claim 1, wherein the binder comprises at least two binders having different melting points.

5. The part for casting according to claim 1, wherein the binder consists of an organic binder and/or an inorganic binder.

6. The part for casting according to claim 5, wherein the inorganic binder is a compound mainly comprising SiO₂.

7. The part for casting according to claim 1, wherein the organic fiber is paper fiber.

8. A method for casting production which uses the part for casting according to claim 1, the part for casting being disposed in casting sand.

9. A process of producing a part for casting, which is for producing the part for casting according to claim 1, comprising the steps of making base paper for paper tubing by papermaking using a slurry containing at least the organic fiber and the inorganic fiber, converting the base paper into a paper tube, and incorporating the binder into the paper tube.

10. The process of producing a part for casting according to claim 9, wherein the binder is an organic binder, and the step of incorporating the binder into the paper tube is impregnation.

11. The process of producing a part for casting according to claim 10, wherein the slurry further contains the inorganic binder.