Part prepared through sheet-making process for use in producing castings and method for preparation tyhereof

• US 20040069429A1
• Filed: 08/20/2003
• Published: 04/15/2004
• Est. Priority Date: 03/13/2002
• Status: Active Grant

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Kobayashi, Hiroaki, Takagi, Yoshimasa, Tsuura, Tokuo, Nakai, Shigeo, Sono, Tokihito
• Granted Patent: US 7,815,774 B2
• Time in Patent Office: Days
• US Class Current: 162/218
• CPC Class Codes: B22C 1/167 Mixtures of inorganic and organic binding agents
• CPC Class Codes: B22C 9/046 Use of patterns which are eliminated by the liquid metal in the mould
• CPC Class Codes: B22C 9/08 Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]

Abstract

An element made by papermaking for use in the production of a die casting which comprises an organic fiber, an inorganic fiber, and a binder. The contents of the organic fiber, the inorganic fiber, and the binder are preferably 10 to 70 parts by weight, 1 to 80 parts by weight, and 10 to 85 parts by weight, respectively. The binder is preferably an organic binder. The organic fiber is preferably pulp fiber.

Claims

1. An element made by papermaking for use in the production of a die casting, which comprises an organic fiber, an inorganic fiber, and a binder.

2. The element made by papermaking for use in the production of a die casting according to claim 1, wherein the organic fiber content is 10 to 70 parts by weight, the inorganic fiber content is 1 to 80 parts by weight, and the binder content is 10 to 85 parts by weight each per 100 parts by weight of the total of the organic fiber, the inorganic fiber, and the binder.

3. The element made by papermaking for use in the production of a die casting according to claim 1, wherein the binder comprises two or more kinds of binders different in melting point or thermal decomposition temperature.

4. The element made by papermaking for use in the production of a die casting according to claim 1, wherein the binder is an organic binder and/or an inorganic binder.

5. The element made by papermaking for use in the production of a die casting according to claim 1, wherein the inorganic binder is a compound mainly comprising SiO₂.

6. The element made by papermaking for use in the production of a die casting according to claim 1, wherein the organic fiber is paper fiber.

7. The element made by papermaking for use in the production of a die casting according to claim 1, which is characterized by being hollow.

8. The element made by papermaking for use in the production of a die casting according to claim 1, which has means for controlling the length thereof.

9. The element made by papermaking for use in the production of a die casting according to claim 1, which is composed of a plurality of connectable parts.

10. A method of producing a die casting using an element made by papermaking according to claim 1, wherein the element is buried in casting sand.

11. A method of producing an element for use in the production of a die casting according to claim 1, which comprises the steps of forming a molded article by papermaking from a slurry comprising the organic fiber and the inorganic fiber and incorporating the binder into the molded article.

12. The method of producing an element for use in the production of a die casting according to claim 11, wherein the binder is an organic binder, and the organic binder is incorporated by impregnation.

13. The method of producing an element for use in the production of a die casting according to claim 11, wherein the inorganic binder is incorporated into the slurry.