US20100096272A1 - Processing technique for hard pure gold accessories - Google Patents

Processing technique for hard pure gold accessories Download PDF

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Publication number
US20100096272A1
US20100096272A1 US12/546,817 US54681709A US2010096272A1 US 20100096272 A1 US20100096272 A1 US 20100096272A1 US 54681709 A US54681709 A US 54681709A US 2010096272 A1 US2010096272 A1 US 2010096272A1
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US
United States
Prior art keywords
electroforming
wax
processing technique
electrolytic solution
accessories
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.)
Abandoned
Application number
US12/546,817
Inventor
Song Qing Guo
Xin Yi Zhang
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.)
SHANDONG ZHAOJIN WANZUJIN Co Ltd
SHANGHAI LAOFENGXIANG CO Ltd
Original Assignee
SHANDONG ZHAOJIN WANZUJIN Co Ltd
SHANGHAI LAOFENGXIANG CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHANDONG ZHAOJIN WANZUJIN Co Ltd, SHANGHAI LAOFENGXIANG CO Ltd filed Critical SHANDONG ZHAOJIN WANZUJIN Co Ltd
Assigned to SHANGHAI LAOFENGXIANG CO., LTD., SHANDONG ZHAOJIN WANZUJIN CO., LTD. reassignment SHANGHAI LAOFENGXIANG CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GUO, SONG QING, ZHANG, XIN YI
Publication of US20100096272A1 publication Critical patent/US20100096272A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/48—Electroplating: Baths therefor from solutions of gold

Definitions

  • This invention regards a gold processing technique, more particularly, it regards a processing technique for hard pure gold accessories.
  • Gold electroplating is a key stage in the processing technique of gold accessories. In current gold electroplating, some factors like gold content, pH value and working temperature of electrolytic solution will lead to maldistribution, long molding time and big thickness of gold plating, frequently arisen of shinning matte and small size, big weight and low hardness of products.
  • the main purpose of this invention is to provide a processing technique of pure gold accessories, which can achieve even distribution, strong covering capacity, thin coating, short molding time, big size, lighy weight and high hardness.
  • the purpose is achieved by a processing technique for hard pure gold accessories, including carving waxwork, making silica molding, grafting wax, trimming wax, oiling, electroforming, wax removing and quality inspection, characterized in that LJJAS compounding agent was added to the electrolytic solution, the electroforming temperature is between 50 to 60 degrees, the electroforming speed is 0.05 g/h and pH value of electrolytic solution is between 7.0 to 7.5.
  • the ingredient contents of LJJAS compounding agent in the preferred embodiment of this invention are as follows, gold salt 62-75%, antimony 0.02-0.04%, oxalic acid 24-28% and silver, copper 3.8-4.0%.
  • the gold content, pH value, working temperature, replenishment volume for maintenance and stirring rate of electrolytic solution are optimized by adding LJJAS compounding agent to the electrolytic solution, setting the electroforming temperature between 50 to 60 degrees, speed at 0.05 g/h and setting the pH value of electrolytic solution between 7.0 to 7.5.
  • LJJAS compounding agent to the electrolytic solution, setting the electroforming temperature between 50 to 60 degrees, speed at 0.05 g/h and setting the pH value of electrolytic solution between 7.0 to 7.5.
  • This invention is comprised of following steps:
  • the silica molding should has smooth surface and seam.
  • the products should not have the faults like granulation and leaking.
  • the wax removal sites of identical products should have same size and good appearance.
  • Products should pass the inspections of damages, uneven surface or granules before they go out.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

A processing technique of electroforming for hard pure gold accessories, including carving waxwork, making silica molding, grafting wax, trimming wax, oiling, electroforming, wax removing and quality inspection, characterized in that LJJAS compounding agent was added to the electrolytic solution, the electroforming temperature is between 50 to 60 degrees, the electroforming speed is 0.05 g/h and pH value of electrolytic solution is between 7.0 to 7.5. Thus, even distribution, strong covering capacity, thin coating, short molding time, big size, lighy weight and high hardness can be achieved. This processing technique is particularly suitable to the gold processing industry.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This application claims priority under 35 U.S.C. §119 to China Patent Application No. 200810158017.4, filed on Oct. 22, 2008, in the China Intellectual Property Office, the entire contents of which are hereby incorporated by reference.
    • BACKGROUND OF THE INVENTION
  • 1. Technology Field
  • This invention regards a gold processing technique, more particularly, it regards a processing technique for hard pure gold accessories.
  • 2. Technology Background
  • The range and types of gold jewelries, accessories and decorative articles are getting more and more wide and plentiful with the developing of modern industry and high technology. The demands of gold accessories in quality, appearance and size are also growing. Gold electroplating is a key stage in the processing technique of gold accessories. In current gold electroplating, some factors like gold content, pH value and working temperature of electrolytic solution will lead to maldistribution, long molding time and big thickness of gold plating, frequently arisen of shinning matte and small size, big weight and low hardness of products.
    • DETAILED DESCRIPTION OF THE INVENTION
  • The main purpose of this invention is to provide a processing technique of pure gold accessories, which can achieve even distribution, strong covering capacity, thin coating, short molding time, big size, lighy weight and high hardness.
  • The purpose is achieved by a processing technique for hard pure gold accessories, including carving waxwork, making silica molding, grafting wax, trimming wax, oiling, electroforming, wax removing and quality inspection, characterized in that LJJAS compounding agent was added to the electrolytic solution, the electroforming temperature is between 50 to 60 degrees, the electroforming speed is 0.05 g/h and pH value of electrolytic solution is between 7.0 to 7.5.
  • The ingredient contents of LJJAS compounding agent in the preferred embodiment of this invention are as follows, gold salt 62-75%, antimony 0.02-0.04%, oxalic acid 24-28% and silver, copper 3.8-4.0%.
  • This invention has the following advantages compared to prior art:
  • The gold content, pH value, working temperature, replenishment volume for maintenance and stirring rate of electrolytic solution are optimized by adding LJJAS compounding agent to the electrolytic solution, setting the electroforming temperature between 50 to 60 degrees, speed at 0.05 g/h and setting the pH value of electrolytic solution between 7.0 to 7.5. Thus, the disadvantages of unfavorable and unstable matte plating, frequently arisen of shinning matte and maldistribution, weak coating capacity will be conquered. The products have the advantages of high hardness and good rigidity. The hollow gold product will reduce the thickness of gold plating and gold consumption, moreover, it will make the gold plating more effective and even. Therefore, it can achieve even distribution, strong covering capacity, thin coating, short molding time, big size, light weight and high hardness.
  • This invention is comprised of following steps:
  • 1. Carving Waxwork
  • Physical model is made by wax according to the drawing with clear and sharp outline, subtle detail and proper scale.
  • 2. Making Silica Molding
  • Cover the surface of physical model with silica and leave to dry. Then take out the physical model from the silica molding. The silica molding should has smooth surface and seam.
  • 3. Grafting Wax
  • Fully inject liquid wax into the silica molding and leave to coagulate. The wax piece is obtained after peeling off the silica molding.
  • 4. Trimming Wax
  • Trim the surface of wax piece carefully using a trimming pen to ensure the conformity between the wax piece and the original version.
  • 5. Oiling
  • Paint the wax piece with silver oil. The products should not have the faults like granulation and leaking. The wax removal sites of identical products should have same size and good appearance.
  • 6. Electroforming
  • Mix LJJAS compounding agent with electrolytic solution in the electroforming vessel and adjust the pH value of the electrolytic solution to 7.0 to 7.5. Start the electroforming vessel, raise the internal temperature to 50-60 degrees. Then put the oiled wax piece into the vessel for electroforming at the speed of 0.05 g/h.
  • 7. Wax Removing
  • Put the electroformed products into steam furnace, the melted wax will be discharged from the products. There should be no remained wax in the products.
  • 8. Quality Inspection
  • Products should pass the inspections of damages, uneven surface or granules before they go out.

Claims (3)

1. A processing technique for hard pure gold accessories, including carving waxwork, making silica molding, grafting wax, trimming wax, oiling, electroforming, wax removing and quality inspection, characterized in that LJJAS compounding agent was added to the electrolytic solution, the electroforming temperature is between 50 to 60 degrees, the electroforming speed is 0.05 g/h and pH value of electrolytic solution is between 7.0 to 7.5.
2. The processing technique for hard pure gold accessories according to claim 1, characterized in that the ingredient contents of LJJAS compounding agent are as follows, gold salt 62-75%, antimony 0.02-0.04%, oxalic acid 24-28% and silver, copper 3.8-4.0%.
3. According to claim 1 or 2 processed hard pure gold accessories.
US12/546,817 2008-10-22 2009-08-25 Processing technique for hard pure gold accessories Abandoned US20100096272A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810158017.4 2008-10-22
CNA2008101580174A CN101392392A (en) 2008-10-22 2008-10-22 Rigid pure gold ornamental article processing technology

Publications (1)

Publication Number Publication Date
US20100096272A1 true US20100096272A1 (en) 2010-04-22

Family

ID=40492897

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/546,817 Abandoned US20100096272A1 (en) 2008-10-22 2009-08-25 Processing technique for hard pure gold accessories

Country Status (2)

Country Link
US (1) US20100096272A1 (en)
CN (1) CN101392392A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102274928A (en) * 2011-07-29 2011-12-14 林玉成 Method for manufacturing metal accessory through die-parting formation

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2505691B1 (en) * 2011-03-31 2014-03-12 The Swatch Group Research and Development Ltd. Process for obtaining a gold alloy deposit of 18 carat 3N
CN104648033A (en) * 2013-11-23 2015-05-27 张德清 Sounding Chinese zodiac golden bell making technology
CN103637512A (en) * 2013-12-11 2014-03-19 深圳市恩福珠宝有限公司 Gold jewelry bell and production method for same
CN103892528B (en) * 2014-04-15 2015-12-30 深圳市凯恩特珠宝首饰有限公司 A kind of chain type ornaments seamless process method
CN104188293B (en) * 2014-09-15 2016-04-13 深圳市恩福珠宝有限公司 A kind of preparation method of Bell's pan and Bell's pan
CN106498450B (en) * 2016-11-02 2018-08-28 山东招金金银精炼有限公司 A kind of peach-pit gold-silver ornaments eletroforming technique
CN106521594B (en) * 2016-11-25 2018-10-19 深圳市福麒珠宝首饰有限公司 Karat gold is processed into the manufacturing method and its equipment of gold true qualities
CN106637307B (en) * 2017-01-04 2019-01-01 中国地质大学（武汉） A kind of additive for gold without cyanogen electroforming process
CN107419129B (en) * 2017-06-26 2019-07-23 南京市产品质量监督检验院 A kind of hard gold and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172568A (en) * 1988-09-09 1992-12-22 Senanayake Daya R Hollow jewelry objects and method
US5393405A (en) * 1993-12-01 1995-02-28 Ultralite Technology Incorporated Method of electroforming a gold jewelry article
US6123141A (en) * 1995-12-13 2000-09-26 Baum; Robert Method of forming a wax replica

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1157502C (en) * 2000-08-24 2004-07-14 韩巍 Gold electroplatic method for flowers
CN101255578A (en) * 2007-02-26 2008-09-03 深圳市百泰珠宝首饰有限公司 Gold product electrocasting method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172568A (en) * 1988-09-09 1992-12-22 Senanayake Daya R Hollow jewelry objects and method
US5393405A (en) * 1993-12-01 1995-02-28 Ultralite Technology Incorporated Method of electroforming a gold jewelry article
US6123141A (en) * 1995-12-13 2000-09-26 Baum; Robert Method of forming a wax replica

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102274928A (en) * 2011-07-29 2011-12-14 林玉成 Method for manufacturing metal accessory through die-parting formation

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Publication number Publication date
CN101392392A (en) 2009-03-25

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Date Code Title Description
AS Assignment

Owner name: SHANDONG ZHAOJIN WANZUJIN CO., LTD.,CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GUO, SONG QING;ZHANG, XIN YI;REEL/FRAME:023141/0259

Effective date: 20090814

Owner name: SHANGHAI LAOFENGXIANG CO., LTD.,CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GUO, SONG QING;ZHANG, XIN YI;REEL/FRAME:023141/0259

Effective date: 20090814

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION