Cleaning material for molding metal die, and cleaning method
| Title: | Cleaning material for molding metal die, and cleaning method |
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| Patent Number: | 7,553,784 |
| Publication Date: | June 30, 2009 |
| Appl. No: | 10/537358 |
| Application Filed: | November 28, 2003 |
| Abstract: | A sheet-like cleaning material for a molding metal die formed by enclosing a cleaning member in at least two layers of sheet-like base materials, characterized in that the cleaning member is formed of one type of tablet-like, granular, or powdery cleaning member or a sheet-like or a plate-like cleaning member. The cleaning material for the molding metal die desirably involves a forming member together with the cleaning member, the sheet-like base materials are desirably formed of sheet-like fiber base materials with a porosity of 70 vol. % or more, and the sheet-like fiber base materials are used as the outermost layer of the cleaning material for the molding metal die. |
| Inventors: | Hiromitsu, Kiyohito (Uozu, JP); Nomura, Hiroaki (Uozu, JP) |
| Assignees: | Nippon Carbide Kogyo Kabushiki Kaisha (Tokyo, JP) |
| Claim: | 1. A method of cleaning a mold, said method comprising the steps of: sandwiching a mold cleaning material between two halves of a heated mold, applying heat and pressure to the mold cleaning material for a given time to cure the cleaning member, and removing the cleaning material, wherein said mold cleaning material comprises: at least two base sheets, and a combination of a cleaning member and a molding member enclosed between the at least two base sheets, at least the outermost of said at least two base sheets are fibrous sheets having a porosity of 70% or more, the cleaning member has at least one of a tablet form, a granular form, a powder form, a sheet form, and a plate form, and the molding member is at least one of unvulcanized synthetic rubber and unvulcanized natural rubber. |
| Claim: | 2. A method of cleaning a mold, said method comprising the steps of: sandwiching a mold cleaning material between two halves of a heated mold, applying heat and pressure to the mold cleaning material for a given time to cure the cleaning member, and removing the cleaning material, wherein said mold cleaning material comprises: at least two base sheets, a combination of a cleaning member and a molding member enclosed between the at least two base sheets, and a thermoplastic resin film or tape applied to a prescribed part of at least one of said at least two base sheets, the cleaning member has at least one of a tablet form, a granular form, a powder form, a sheet form, and a plate form, and the molding member is at least one of unvulcanized synthetic rubber and unvulcanized natural rubber. |
| Claim: | 3. A method of cleaning a mold, said method comprising the steps of: sandwiching a mold cleaning material between two halves of a heated mold, applying heat and pressure to the mold cleaning material for a given time to cure the cleaning member, and removing the cleaning material, wherein said mold cleaning material comprises: at least two base sheets, a combination of a cleaning member and a molding member enclosed between the at least two base sheets by heat sealing the at least two base sheets via a thermoplastic resin film or tape, the cleaning member has at least one of a tablet form, a granular form, a powder form, a sheet form, and a plate form, and the molding member is at least one of unvulcanized synthetic rubber and unvulcanized natural rubber. |
| Claim: | 4. A method of cleaning a mold, said method comprising the steps of: sandwiching a mold cleaning between two halves of a heated mold, applying heat and pressure to the mold cleaning material for a given time to cure the cleaning member, and removing the cleaning material, wherein said mold cleaning material comprises: at least two base sheets, a combination of a cleaning member and a molding member enclosed between the at least two base sheets by adhering the at least two base sheets with at least one of a double-sided tape, an adhesive, and a pressure sensitive adhesive, the cleaning member has at least one of a tablet form, a granular form, a powder form, a sheet form, and a plate form, and the molding member is at least one of unvulcanized synthetic rubber and unvulcanized natural rubber. |
| Claim: | 5. A method of cleaning a mold, said method comprising the steps of: sandwiching a mold cleaning material between two halves of a heated mold, applying heat and pressure to the mold cleaning material for a given time to cure the cleaning member, and removing the cleaning material, wherein said mold cleaning material comprises: at least two base sheets, a combination of a cleaning member and a molding member enclosed between the at least two base sheets by adhering the at least two base sheets by pressing or deforming the base sheets, the cleaning member has at least one of a tablet form, a granular form, a powder form, a sheet form, and a plate form, and the molding member is at least one of unvulcanized synthetic rubber and unvulcanized natural rubber. |
| Current U.S. Class: | 442/394 |
| Patent References Cited: | 4469729 September 1984 Watanabe et al. 4670329 June 1987 Pas 5972470 October 1999 Engst 6101661 August 2000 Policicchio et al. 6669391 December 2003 Policicchio et al. 6739161 May 2004 Ohara et al. 7-304044 November 1995 10-67021 March 1998 2001-79857 March 2001 |
| Other References: | English translation of Jul. 7, 2006 Chinese Official Action in corresponding Chinese Application No. 200380104791.2. cited by other |
| Primary Examiner: | Webb, Gregory E |
| Attorney, Agent or Firm: | Young & Thompson |
| Accession Number: | edspgr.07553784 |
| Database: | USPTO Patent Grants |
| Language: | English |
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