US2126737A - Manufacture of articles from powdered materials - Google Patents

Manufacture of articles from powdered materials Download PDF

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Publication number
US2126737A
US2126737A US35631A US3563135A US2126737A US 2126737 A US2126737 A US 2126737A US 35631 A US35631 A US 35631A US 3563135 A US3563135 A US 3563135A US 2126737 A US2126737 A US 2126737A
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US
United States
Prior art keywords
base
powdered
metals
sintered body
articles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US35631A
Inventor
Gregory J Comstock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Handy and Harman
Original Assignee
Handy and Harman
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Filing date
Publication date
Application filed by Handy and Harman filed Critical Handy and Harman
Priority to US35631A priority Critical patent/US2126737A/en
Application granted granted Critical
Publication of US2126737A publication Critical patent/US2126737A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/26—Inlaying with ornamental structures, e.g. niello work, tarsia work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49588—Jewelry or locket making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component

Definitions

  • This invention relates generally to the manufacture of articles from powdered metals and more particularly to the manufacture of articles such as silverware jewelry and objects of art from precious metals or mixtures of precious metals with base metals.
  • the invention isparticularly described in connection with the use of powdered precious metals such as silver, gold, platinum, iridium, palladium and the like.
  • the base metals which may be used in conjunction with the precious metals are copper, nickel, zinc, antimony, cobalt, molybdenum, tungsten, titanium, tantalum, iron, and alloys of these metals.
  • Powdered metals are used for a wide variety of purposes, among which may be mentioned the production of porous material for use as bearings, and the production of cutting tools where thepowdered materials employed are generally the refractory metals or their carbides.
  • the present invention relates to the production of solid, that is, non-porous, articles as contrasted with those suitable for'bearings.
  • non-porousYI mean compositions which are relatively free from pores as compared with those compositions suitable for bearings and which are usually made porous intentionally 'so as to hold a lubricant.
  • the non-porous compositions of the present invention are those which are sufiiciently dense so that they do not work materially dififerently from the melted and cast alloys and have strengths and other properties not materially different from cast alloys.
  • the metals which I employ are the precious metals either alone or in conjunction with smaller amounts of base metals as contrasted with compositions containing the refractory metals such as tungsten or tantalum or their carbides in large amount, which compositions are employed for the production of cutting tools, drawing dies and the like.
  • articles can be made of various compositions which would not be possible to make bya melting andcasting process due to the fact that in such melting and casting proceases the composition in many cases is limited by the tendency oi the metalsemployed to alloy with each other in diflerent proportions.
  • the present invention is applicable to the proso as to form the desired design on the presintered base. Lines, lettering or designs may be applied in this way in a very simple manner. Powdered silver is then sprinkled over the presintered base and the excess powder which does 5 not stick to the adhesive is shaken off and the base with the powdered silver adhering thereto in the desired design is placed in a mold and hot pressed. In the hot pressing operation, a highly polished metal plunger thinly coated with graphite or lamp black is used to prevent the plunger sticking to the applied powder. The pressure employed in the hot pressing step may be, for example, 2000-4000#/sq. in. in order to consolidate the powder and densify the presintered base.
  • Powdered metal may be applied to a cast and rolled base rather than to a presintered base by the method just described of applying powdered metal to an adhesive applied in a design to a base, and the base with the applied powder may then be subject to .hot pressing as previously described.
  • a design of copper inlaid on a rolled sheet of sterling silver has been successfully made according to this process.
  • the method of forming an inlaid article which comprises forming a sintered body from powdered materialby the simultaneous application of heat and pressure, applying powdered material to the sintered body by the use of an adhesive, and sintering the powdered material and consolidating it with the sintered body by the simultaneous application of heat and pressure greater than the heat and pressure employed in forming the sintered body to which the powdered material was applied.
  • the method of forming an inlaid article which comprises simultaneously heating and pressing powdered material to form a sintered body, applying an adhesive to the sintered body in the desired design, applying powdered material to the sintered body and shaking off the excess which does not adhere to the adhesive, and subjecting the sintered body with the powdered material adhering thereto in the desired design to the simultaneous application of heat and pressure greater than the heat and pressure employed in forming the sintered body.
  • the method of forming an inlaid article which comprises applying powdered material in a design to a base by the use of an adhesive, and subjecting the base and appliedpowdered material to simultaneous heat and pressure sufficient to sinter and consolidate the design with the base.
  • the method of forming an inlaid article which comprises applying powdered precious metal in a design to a base by the use of an adhesive, and subjecting the base and applied powdered precious metal to simultaneous heat and pressure sumcient to sinter and consolidate the design with the base.
  • the method of forming an inlaid article which comprises applying powdered material in a design to a cast and rolled base by the use of an adhesive, and subjecting the base and applied powdered material to simultaneous heat and pressure suflicient to sinter and consolidate the design with the base.

Description

- Patented Aug. is, 1938 UNITED STATES.
PATENT OFFICE Gregory J. Comstock, Fairfield, Conn., assignor to Handy & Harman, Bridgeport, Conn., a corporation of New York No Drawing.
Application August 10, 1935, SeriaLNo. 35,631
8 Claims. (or 73-22) This invention relates generally to the manufacture of articles from powdered metals and more particularly to the manufacture of articles such as silverware jewelry and objects of art from precious metals or mixtures of precious metals with base metals. The invention isparticularly described in connection with the use of powdered precious metals such as silver, gold, platinum, iridium, palladium and the like. Among the base metals which may be used in conjunction with the precious metals are copper, nickel, zinc, antimony, cobalt, molybdenum, tungsten, titanium, tantalum, iron, and alloys of these metals.
Powdered metals are used for a wide variety of purposes, among which may be mentioned the production of porous material for use as bearings, and the production of cutting tools where thepowdered materials employed are generally the refractory metals or their carbides. The present invention relates to the production of solid, that is, non-porous, articles as contrasted with those suitable for'bearings. By the term non-porousYI mean compositions which are relatively free from pores as compared with those compositions suitable for bearings and which are usually made porous intentionally 'so as to hold a lubricant.
The non-porous compositions of the present invention are those which are sufiiciently dense so that they do not work materially dififerently from the melted and cast alloys and have strengths and other properties not materially different from cast alloys. The metals which I employ are the precious metals either alone or in conjunction with smaller amounts of base metals as contrasted with compositions containing the refractory metals such as tungsten or tantalum or their carbides in large amount, which compositions are employed for the production of cutting tools, drawing dies and the like. By the use of powdered metals, articles can be made of various compositions which would not be possible to make bya melting andcasting process due to the fact that in such melting and casting proceases the composition in many cases is limited by the tendency oi the metalsemployed to alloy with each other in diflerent proportions.
. The present invention is applicable to the proso as to form the desired design on the presintered base. Lines, lettering or designs may be applied in this way in a very simple manner. Powdered silver is then sprinkled over the presintered base and the excess powder which does 5 not stick to the adhesive is shaken off and the base with the powdered silver adhering thereto in the desired design is placed in a mold and hot pressed. In the hot pressing operation, a highly polished metal plunger thinly coated with graphite or lamp black is used to prevent the plunger sticking to the applied powder. The pressure employed in the hot pressing step may be, for example, 2000-4000#/sq. in. in order to consolidate the powder and densify the presintered base.
Powdered metal may be applied to a cast and rolled base rather than to a presintered base by the method just described of applying powdered metal to an adhesive applied in a design to a base, and the base with the applied powder may then be subject to .hot pressing as previously described. A design of copper inlaid on a rolled sheet of sterling silver has been successfully made according to this process.
For purposes of illustration I have described the invention particularly with reference to the use of silver and copper. It will be understood,
however, that other combinations of powdered and sintering the powdered material and consolidating it with the sintered body by the a plication of heat and pressure.
2. The method of forming an inlaid article, which -comprises forming a sintered body from powdered material by the simultaneous application of heat and pressure, applying powdered material to the sintered body by the use of an adhesive, and sintering the powdered material and consolidating it with the sintered body by the application of heat and pressure.
3. The method of forming an inlaid article, which comprises forming a sintered body from powdered materialby the simultaneous application of heat and pressure, applying powdered material to the sintered body by the use of an adhesive, and sintering the powdered material and consolidating it with the sintered body by the simultaneous application of heat and pressure greater than the heat and pressure employed in forming the sintered body to which the powdered material was applied.
4. The method of forming an inlaid article, which comprises simultaneously heating and pressing powdered material to form a sintered body, applying an adhesive to the sintered body in the desired design, applying powdered material to the sintered body and shaking off the excess which does not adhere to the adhesive, and subjecting the sintered body with the powdered material adhering thereto in the desired design to the simultaneous application of heat and pressure greater than the heat and pressure employed in forming the sintered body.
5. The method of forming an inlaid article, which comprises applying powdered material in a design to a base by the use of an adhesive, and subjecting the base and appliedpowdered material to simultaneous heat and pressure sufficient to sinter and consolidate the design with the base.
6. The method of forming an inlaid article, which comprises applying powdered precious metal in a design to a base by the use of an adhesive, and subjecting the base and applied powdered precious metal to simultaneous heat and pressure sumcient to sinter and consolidate the design with the base.
7. The method of forming an inlaid article, which comprises applying powdered material in a design to a cast and rolled base by the use of an adhesive, and subjecting the base and applied powdered material to simultaneous heat and pressure suflicient to sinter and consolidate the design with the base.
8. The method of forming an inlaid article, which comprises applying powdered precious metal in a design to a cast and rolled base by the use of an adhesive, and subjecting the base and applied powdered precious metal to simultaneous heat and pressure sufllcient to sinter and consolidate the design with the base.
GREGORY J. COMSTOCK.
US35631A 1935-08-10 1935-08-10 Manufacture of articles from powdered materials Expired - Lifetime US2126737A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681375A (en) * 1948-05-04 1954-06-15 Vogt Hans Electrode for electric batteries and a process for producing the same
US20060123608A1 (en) * 1997-09-08 2006-06-15 Trent West Methods of making tungsten carbide-based annular jewelry rings
US20120164483A1 (en) * 2009-08-19 2012-06-28 Aida Chemical Industries Co., Ltd Method for producing decorative metallic article, and decorative metallic article

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681375A (en) * 1948-05-04 1954-06-15 Vogt Hans Electrode for electric batteries and a process for producing the same
US20060123608A1 (en) * 1997-09-08 2006-06-15 Trent West Methods of making tungsten carbide-based annular jewelry rings
US7761996B2 (en) 1997-09-08 2010-07-27 Trent West Methods of making tungsten carbide-based annular jewelry rings
US20100307005A1 (en) * 1997-09-08 2010-12-09 Trent West Methods Of Making Tungsten Carbide-Based Annular Jewelry Rings
US8061033B2 (en) 1997-09-08 2011-11-22 Trent West Methods of making tungsten carbide-based annular jewelry rings
US8584360B2 (en) 1997-09-08 2013-11-19 Trent West Methods of making tungsten carbide-based annular jewelry rings
US20120164483A1 (en) * 2009-08-19 2012-06-28 Aida Chemical Industries Co., Ltd Method for producing decorative metallic article, and decorative metallic article

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