JPH0397900A - Method for removal of filling material from hollow forging and forgings treated by said method - Google Patents
Method for removal of filling material from hollow forging and forgings treated by said methodInfo
- Publication number
- JPH0397900A JPH0397900A JP2224540A JP22454090A JPH0397900A JP H0397900 A JPH0397900 A JP H0397900A JP 2224540 A JP2224540 A JP 2224540A JP 22454090 A JP22454090 A JP 22454090A JP H0397900 A JPH0397900 A JP H0397900A
- Authority
- JP
- Japan
- Prior art keywords
- copper
- gold
- core
- solution
- cores
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract 3
- 238000000034 method Methods 0.000 title claims description 35
- 238000005242 forging Methods 0.000 title 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 239000010949 copper Substances 0.000 claims abstract description 18
- 239000010931 gold Substances 0.000 claims abstract description 18
- 229910052737 gold Inorganic materials 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 6
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229920001353 Dextrin Polymers 0.000 claims abstract description 3
- 239000004375 Dextrin Substances 0.000 claims abstract description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 3
- 238000002425 crystallisation Methods 0.000 claims abstract description 3
- 230000008025 crystallization Effects 0.000 claims abstract description 3
- 235000019425 dextrin Nutrition 0.000 claims abstract description 3
- 229920000151 polyglycol Polymers 0.000 claims abstract description 3
- 239000010695 polyglycol Substances 0.000 claims abstract description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract 3
- 230000002378 acidificating effect Effects 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 230000002596 correlated effect Effects 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims 2
- 239000001166 ammonium sulphate Substances 0.000 claims 1
- 230000001112 coagulating effect Effects 0.000 claims 1
- 239000010953 base metal Substances 0.000 abstract 2
- 239000003792 electrolyte Substances 0.000 abstract 2
- 238000004804 winding Methods 0.000 abstract 2
- 229910000366 copper(II) sulfate Inorganic materials 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910000994 Tombac Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F5/00—Electrolytic stripping of metallic layers or coatings
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
- A44C27/002—Metallic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、中空錬金内の充てん材を除去する方法に関す
る。本発明は同様に、かくして処理された中空錬金にも
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for removing filler in a hollow metal. The invention likewise relates to hollow alchemy thus treated.
〔従来の技術および発明が解決しようとする課題〕本発
明が関係する中空錬金は、あらゆる純度すなわちカラッ
ト重量を有する可能性があり、鎖（ネックレス、ブレス
レット、ブローチなど）の鍛錬製品の形或いは又その他
の製品の形で製造され、しかも販売時点では中空の内部
を有するようなタイプの金である。[Prior Art and Problems to be Solved by the Invention] Hollow alchemy to which the present invention pertains can be of any purity or carat weight, and may be in the form of wrought products such as chains (necklaces, bracelets, brooches, etc.) or There are also other types of gold that are manufactured in the form of products that have a hollow interior at the point of sale.
かかる中空金は、銅又は例えばトンバック又は王金とい
った銅合金或いは又その他の金属又は合金のコア上に金
箔を巻きつけ、金箔の縁部を一致させることにより作ら
れる。Such hollow gold is made by wrapping gold foil over a core of copper or a copper alloy such as Tombac or Okinawa, or other metal or alloy, and matching the edges of the gold foil.
縁部は一敗させられるものの、通常は合わせて溶接され
ないか、又はその一致させられた長さ全体にわたり溶接
されているわけではない。Although the edges are defeated, they are usually not welded together or over their matched lengths.
金製品が鍛錬された時点で、金はそのコアが空にされ、
さらに考えられる仕上げ及び補完作業の後に市販される
。When a gold product is forged, the core of the gold is emptied;
It is placed on the market after further possible finishing and complementing operations.
現時点では、コアの除去は、中空錬金製品を硝酸ＨＮＯ
ｆｆ又は塩酸ＨＣｌ又はその他の鉱酸の熱浴の中に浸漬
させ、約８時間から２４時間の所要時間そこに保つこと
により行なわれている。At present, core removal is performed by hollow alchemy products with nitric acid HNO
ff or by immersion in a hot bath of hydrochloric acid, HCl, or other mineral acid and holding there for a period of time ranging from about 8 to 24 hours.
硝酸又は塩酸又はその他の酸は金箔の縁部の間の中間空
間を通って流れ、コアを形戒する銅及び／又はその他の
金属又は合金を攻撃し、コアの構或成分を、使用されて
いる酸に応じて硝酸塩、塩化物又はその他の塩に変換す
る。Nitric or hydrochloric acid or other acids flow through the intermediate space between the edges of the gold foil and attack the copper and/or other metals or alloys that form the core, destroying the core's constituent components. Converted to nitrate, chloride or other salts depending on the acid present.
かかる作業は複数の制限及び欠点をもたらす。Such work presents several limitations and drawbacks.
第１の制限は、窒素酸化物の煙霧の処分に関連する環境
上の問題点から成るものである。現在、かかる処分は、
大気中に行なわれており、禁止されているか又は代替的
には煙霧の化学的吸収ならびにその後のかかる吸収に用
いられた化学的溶液の処分を必要としている。The first limitation consists of environmental concerns associated with the disposal of nitrogen oxide fumes. Currently, such disposition is
Chemical absorption of the fumes and subsequent disposal of the chemical solutions used for such absorption is prohibited or alternatively is carried out in the atmosphere.
もう１つの限界は、有毒有害であるものとして指定され
た廃棄物を形成する使用済み溶液及び沈積物の除去及び
処分の費用及びむずかしさにある．１つの欠点は、製品
試料を用いた経験的検査及び視聴覚手段でのその検査に
よって作業の完了が評価されることから、該方法は自動
化されていないという事実にある。Another limitation lies in the expense and difficulty of removing and disposing of spent solutions and sludge, which form waste designated as toxic and hazardous. One drawback lies in the fact that the method is not automated, since the completion of the work is assessed by empirical testing with product samples and their testing with audiovisual means.
低カラット重量又は金純度で特に顕著であるもう１つの
欠点は、金と混和された成分に対して起こる攻撃である
。というのも、かかる攻撃は、金製品の光沢が少なく濃
度の低い仕上げの場合に明らかになるからである。Another drawback, which is particularly noticeable at low carat weights or gold purity, is the attack that occurs on the ingredients blended with the gold. This is because such an attack becomes apparent in the case of a less lustrous and less dense finish on the gold product.
銅のコア上の中空諌金製品を空にするためのキュープロ
アンモニア溶液の使用を提供する１つの方法が開示され
た：かかる方法は、キューブロアンモニア溶液内での第
ｌの浴、希釈酸溶液でのすすぎ及び最終的洗浄すすぎを
提供している。One method has been disclosed which provides for the use of a cuproammonium solution for emptying a hollow recessed metal product on a copper core: such a method comprises a first bath in a cuberoammonium solution, a dilute acid Provides a solution rinse and a final cleaning rinse.
しかしながらかかる方法は、複数の装置、高い投資コス
ト及び高い生産及びメンテナンス費用といった複数の問
題を提起する。However, such methods pose several problems, such as multiple devices, high investment costs and high production and maintenance costs.
その上、作業の制御は複雑で微妙なものであり、しかも
プロセスは純化を必要とするガスの放出の原因となる。Moreover, the control of the operation is complex and delicate, and the process causes emissions of gases that require purification.
〔課題を解決するための手段］
当該出願人は、かかる欠点及び限界を考慮し、これらを
克服しかつ以下の記述において明白になるその他の利点
を提供する目的で本発明を考案した。SUMMARY OF THE INVENTION In view of such drawbacks and limitations, the applicant has devised the present invention with the aim of overcoming them and providing other advantages that will become apparent in the following description.
本発明に従った中空錬金内の充てん材を除去する方法は
、第１の独立クレーム内に述べられており、一方従属ク
レームは当該解決案の変形態様を記述している。A method for removing filler in a hollow metal according to the invention is stated in the first independent claim, while the dependent claims describe variants of the solution.
当該方法に従った中空錬金は、関連する一般クレーム内
で述べられている。Hollow alchemy according to the method is stated in the relevant general claims.
本発明に従うと、なおコアを含んでいる中空錬金製品は
、１０グラム／リソトルの硫酸｝１，ＳＯ．及び５０グ
ラム／リットルの硫酸１ｉｉｃｕｓＯａ ５ ＨｚＯ
（’）溶液、すなわち電解活性をもつ酸溶液内での電解
作用を受ける．
コアが銅合金で構成されている場合、前記溶液には同様
に、銅と混和された金属を攻撃する物質及び／又は、結
果として得られる化合物又は混和された金属を凝集及び
／又は複合体にするための物質が含まれていてもよい。According to the present invention, the hollow metal product, which still contains the core, is prepared using 10 grams/litol of sulfuric acid}1,SO. and 50 grams/liter of sulfuric acid 1iicus Oa 5 HzO
(') Subject to electrolytic action in a solution, that is, an acid solution with electrolytic activity. If the core is composed of a copper alloy, the solution may also contain substances that attack the metal mixed with the copper and/or cause the resulting compound or the mixed metal to agglomerate and/or form complexes. It may also contain a substance to do so.
本発明に従うと、基本的処方の１つにおいて溶液は、以
下のような構戒を有していると考えられる；
Ｈ２ＳＯ４ ７〜１８グラム／リットル、通常は１０
グラム／リットル、
ＣｕＳＯｓ ５ ）ｌｚｏ ３ ５ 〜７ ５グ
ラム／リントル、通常５０グラム／リットル、
Ｚｎ（亜鉛） ｌ〜２０グラム／リットル、通常１０
グラム／リットル。According to the invention, in one of the basic formulations, the solution is considered to have the following composition: H2SO4 7-18 grams/liter, usually 10
grams/liter, CuSOs 5) lzo 35 ~ 7 5 grams/liter, typically 50 grams/liter, Zn (zinc) 1 ~ 20 grams/liter, typically 10
grams/liter.
温度は３５℃から８５℃まで変化しうるが、通常５０℃
から７０℃である。Temperature can vary from 35°C to 85°C, but usually 50°C
to 70°C.
電解作用は、陽極として中空錬金を用い、陰極としては
有利には銅（ただしこれに限られるわけではない）を使
用することによって得られ、陰極に対して２００藁リボ
ルトがち９００果リボルトの電圧が印加される；陰極の
サイズは、２〜３．５アンペア／ｄｍ２通常は２．５ア
ンペア／ｄＩＩ２の電流密度を有することになるような
ものである。The electrolytic action is obtained by using a hollow metal as the anode and preferably, but not exclusively, copper as the cathode, with a voltage of 200 to 900 volts relative to the cathode. is applied; the size of the cathode is such that it will have a current density of 2-3.5 Amps/dm2, typically 2.5 Amps/dII2.
有利には、定電圧が印加される。Advantageously, a constant voltage is applied.
一変形態様に従うと、電圧は一定の時間にわたり可変的
であり、かかる変化は浴内に存在する活性要素の濃度に
相関されうる。According to one variant, the voltage is variable over a period of time and such changes can be correlated to the concentration of active element present in the bath.
通用される電流は、浴の電気化学ポテンシャルの結果で
ある。The current passed is a result of the electrochemical potential of the bath.
本発明に従うと、電気パラメータの制御によりサイクル
を自動化することができ、さらに又補充を用いて活性要
素の交換をプログラミングすることも可能である。According to the invention, cycles can be automated by controlling electrical parameters, and it is also possible to program the replacement of active elements using replenishment.
補充は徐々に行なうこともできるし、或いは又活性要素
が予め設定した闇値に達した時点で行なってもよい。Replenishment can be done gradually, or alternatively, when the active element reaches a predetermined darkness value.
有利には、補充は、活性要素を最通な値までもっていく
のに適した濃縮溶液を用いて行なわれる。Advantageously, replenishment is carried out using concentrated solutions suitable for bringing up the active ingredient to the most acceptable levels.
本発明は、陰極上に電解銅として沈着させられ従って再
利用可能な銅を回収可能にする。The present invention enables the recovery of copper that is deposited as electrolytic copper on the cathode and can therefore be reused.
銅合金の場合コアのその他の構戒要素に関しては、かか
る構成要素は、塩の形で溶液中にとどまるか又は凝集さ
せられて定期的に放出させられることも可能である。As for the other constituents of the core in the case of copper alloys, such constituents can also remain in solution in the form of salts or be aggregated and periodically released.
補充用水剤には同様に、いずれかの方法でコアの前記そ
の他の構戒要素を処理するのに適した化学的要素も含ま
れていてよい。The replenishment solution may also contain chemical elements suitable for treating the other structural elements of the core in any manner.
さらに、補充用水剤には、硫酸アンモニウム、硫酸ナト
リウム、デキストリン、ポリグリコール又はチオ尿素と
いった陰極析出物の結晶化を変更するための要素が含ま
れていてもよい。Additionally, the replenishment solution may contain elements to modify the crystallization of cathodic deposits, such as ammonium sulfate, sodium sulfate, dextrin, polyglycols or thiourea.
当該技術分野における現状のもつ限界及び欠点を取り除
く以外に、本発明は、大気及び作業環境に関する毒性の
不在を提供する。Besides obviating the limitations and shortcomings of the current state of the art, the present invention provides an absence of toxicity with respect to the atmosphere and working environment.
その上、本発明によると、銅は電解銅として回収可能と
なり、溶液レベルを予め設定すること及び銅に対する攻
撃パラメータを予め決定することが可能となり、金と共
に合金中に含まれている補足的構或成分が攻撃を受ける
ことはなくなる。Moreover, according to the invention, the copper can be recovered as electrolytic copper, the solution level can be preset and the attack parameters for the copper can be predetermined, and the supplementary components included in the alloy along with the gold can be Certain components will no longer be attacked.
こうして、完成した金の表面仕上げはさらに良くなり、
金の光沢もより優れたものとなる。In this way, the surface finish of the finished gold becomes even better,
The luster of the gold also becomes better.
電解プロセスのパラメータ自体により、本発明はサイク
ルの終了を確実に表示することを可能にしており、従っ
て、電気パラメータを調整し浴の値を検査することによ
って、結果を予め設定することが可能である。Due to the parameters of the electrolytic process itself, the invention makes it possible to reliably indicate the end of the cycle, and therefore by adjusting the electrical parameters and checking the bath values it is possible to preset the result. be.
Claims (1)
の金属の合金でできたコアのまわりに巻きつけられた金
箔から成る鍛錬製品の形をした中空錬金内の充てん材を
除去する方法において、金箔の縁部は互いに一致させら
れており少なくとも部分的には合わせて溶接されておら
ず、金は同様にあらゆる望ましい純度すなわちカラット
重量のものであり、金製品はコアを除去する電解作業を
受けることを特徴とする中空錬金中の充てん物の除去方
法。 ２、電解プロセスは、硫酸及び硫酸銅を含む溶液中又は
あらゆる場合において酸性環境の中で実施されることを
特徴とする、請求項１に記載の方法。 ３、溶液には、少なくとも７〜１８グラム／リットル、
有利には１０グラム／リットルの硫酸Ｈ＿２ＳＯ＿４及
び３５〜７５グラム／リットル、有利には５０グラム／
リットルの硫酸銅ＣｕＳＯ＿４５Ｈ＿２Ｏが含まれ、溶
液は３５℃から８５℃有利には５０℃から７０℃の間の
温度に保たれていることを特徴とする、請求項１又は２
に記載の方法。 ４、溶液には同様に最高２０グラム／リットルのＺｎ（
亜鉛）が含まれていることを特徴とする、請求項１乃至
３のいずれかに記載の方法。 ５、溶液には、コアを構成している合金の補助成分を攻
撃する物質が含まれていることを特徴とする、請求項１
乃至４のいずれかに記載の方法。 ６、溶液には、コアを構成している合金の補助成分を凝
集させるための物質が含まれていることを特徴とする、
請求項１乃至５のいずれかに記載の方法。 ７、溶液はプロセス中活性要素の値を回復すべく補充さ
れることを特徴とする、請求項１乃至６のいずれかに記
載の方法。 ８、硫酸アンモニウム、硫酸ナトリウム、デキストリン
、ポリグリコール又はチオ尿素といった陰極析出物の結
晶化を修正するための要素も含んでいる濃縮溶液で補充
が行なわれることを特徴とする、請求項１乃至７のいず
れかに記載の方法。 ９、補充は、浴の物理−化学パラメータと相関され、自
動的であることを特徴とする、請求項１乃至８に記載の
方法。 １０、補充は、浴の予め設定された物理−化学パラメー
タに達した時点で自動的に実施されることを特徴とする
、請求項１乃至８のいずれか１項に記載の方法。 １１、陰極が銅又はそれに類する材料で構成されている
のに対し金製品は陽極として用いられていること、又２
００ミリボルトから９００ミリボルトの間の電圧が印加
されていることを特徴とする、請求項１乃至１０のいず
れかに記載の方法。 １２、陰極の寸法は２〜３．５アンペア／ｄｍ＾２の間
有利には２．５アンペア／ｄｍ＾２の電流密度と相関さ
れていることを特徴とする、請求項１乃至１１のいずれ
かに記載の方法。 １３、一定値の電圧が印加されることを特徴とする、請
求項１乃至１２のいずれかに記載の方法。 １４、少なくとも該方法の一部分において可変的値の電
圧が印加され、活性要素の濃度と相関されていることを
特徴とする、請求項１乃至１１のいずれかに記載の方法
。 １５、サイクルの終りが電気パラメータを制御すること
によって監視されていることを特徴とする、請求項１乃
至１４のいずれかに記載の方法。 １６、コアの銅は電解銅の形で回収されることを特徴と
する、請求項１乃至１５のいずれかに記載の方法。 １７、鍛錬製品の形で処理されている中空金でできた製
品において、銅又はもう１つの金属又は合金のコアのま
わりに巻きつけられた金箔で構成されており、金箔の縁
部は互いに一致させられており少なくとも部分的には合
わせて溶接されておらず、金は同様にあらゆる望ましい
純度すなわちカラット重量のものであり、かかる金製品
は前記請求項１乃至１６のいずれかに記載の方法に従っ
てコアを除去するための電解プロセスを受けることを特
徴とする製品。[Claims] 1. A hollow metal in the form of a wrought product consisting of gold foil wrapped around a core made of copper or copper alloys or other metals and/or alloys of other metals. In the method of removing the filler, the edges of the gold leaf are matched to each other and are not at least partially welded together, the gold is likewise of any desired purity or carat weight, and the gold article is A method for removing fillings in a hollow alchemy, the method comprising undergoing electrolytic work to remove the core. 2. Process according to claim 1, characterized in that the electrolytic process is carried out in a solution containing sulfuric acid and copper sulfate or in any case in an acidic environment. 3. The solution contains at least 7 to 18 grams/liter;
Advantageously 10 g/l sulfuric acid H_2SO_4 and 35-75 g/l, advantageously 50 g/l
liter of copper sulfate CuSO_45H_2O, the solution being kept at a temperature between 35°C and 85°C, preferably between 50°C and 70°C.
The method described in. 4. The solution also contains up to 20 grams/liter of Zn (
The method according to any one of claims 1 to 3, characterized in that the method contains zinc). 5. Claim 1, characterized in that the solution contains a substance that attacks the auxiliary components of the alloy constituting the core.
5. The method according to any one of 4. 6. The solution contains a substance for coagulating the auxiliary components of the alloy that constitutes the core.
The method according to any one of claims 1 to 5. 7. Process according to any of claims 1 to 6, characterized in that the solution is replenished during the process to restore the value of the active element. 8. Replenishment according to claims 1 to 7, characterized in that the replenishment is carried out with a concentrated solution which also contains elements for correcting the crystallization of cathodic deposits, such as ammonium sulphate, sodium sulphate, dextrin, polyglycol or thiourea. Any method described. 9. Method according to claims 1 to 8, characterized in that the replenishment is correlated to the physico-chemical parameters of the bath and is automatic. 10. Method according to any one of claims 1 to 8, characterized in that replenishment is carried out automatically once preset physico-chemical parameters of the bath are reached. 11. Gold products are used as anodes while the cathodes are made of copper or similar materials, and 2.
11. A method according to any of claims 1 to 10, characterized in that a voltage between 00 and 900 millivolts is applied. 12. Any one of claims 1 to 11, characterized in that the dimensions of the cathode are correlated with a current density of between 2 and 3.5 amperes/dm^2, preferably of 2.5 amperes/dm^2. Method described in Crab. 13. The method according to any one of claims 1 to 12, characterized in that a voltage of a constant value is applied. 14. A method according to any of claims 1 to 11, characterized in that in at least a part of the method a voltage of variable value is applied and is correlated to the concentration of the active element. 15. Method according to any of claims 1 to 14, characterized in that the end of the cycle is monitored by controlling electrical parameters. 16. Process according to any of claims 1 to 15, characterized in that the core copper is recovered in the form of electrolytic copper. 17. In products made of hollow gold processed in the form of wrought products, consisting of gold leaf wrapped around a core of copper or another metal or alloy, the edges of the gold leaf coincide with each other. where the gold is likewise of any desired purity or carat weight, such gold articles are prepared according to the method according to any one of the preceding claims 1 to 16. A product characterized by undergoing an electrolytic process to remove the core.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT83469A/89 | 1989-08-31 | ||
| IT8983469A IT1235130B (en) | 1989-08-31 | 1989-08-31 | PROCEDURE FOR THE ELIMINATION OF THE FILLER IN THE GOLD CABLE WORKED AND GOLD CABLE WORKED SO OBTAINED. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0397900A true JPH0397900A (en) | 1991-04-23 |
Family
ID=11322330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2224540A Pending JPH0397900A (en) | 1989-08-31 | 1990-08-28 | Method for removal of filling material from hollow forging and forgings treated by said method |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0415130A1 (en) |
| JP (1) | JPH0397900A (en) |
| IT (1) | IT1235130B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2121514B1 (en) * | 1995-05-31 | 1999-05-16 | Morini Gabriele | PROCEDURE FOR THE PRODUCTION OF OPEN TUBULAR PROFILES OF NOBLE METAL. |
| IT1304788B1 (en) * | 1998-12-07 | 2001-03-29 | Ezio Ghiandai | NOT PRECIOUS ALLOY WITH WHICH TO REALIZE THE SUPPORT SOUL OF ARTICLES IN PRECIOUS METAL INTERNALLY CABLES |
| CN105543948B (en) * | 2015-12-23 | 2017-10-31 | 苏州卓融新能源科技有限公司 | It is a kind of for PCB electroplate accompany plating plate/drag cylinder plate move back process for copper |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB486107A (en) * | 1936-09-28 | 1938-05-30 | Kevin William Caton Webb | Improvements relating to colour-photography |
| BE629890A (en) * | 1962-03-21 |
-
1989
- 1989-08-31 IT IT8983469A patent/IT1235130B/en active
-
1990
- 1990-08-04 EP EP90115041A patent/EP0415130A1/en not_active Withdrawn
- 1990-08-28 JP JP2224540A patent/JPH0397900A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| IT1235130B (en) | 1992-06-18 |
| IT8983469A0 (en) | 1989-08-31 |
| EP0415130A1 (en) | 1991-03-06 |
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