US3379631A - Electrolytic apparatus - Google Patents

Electrolytic apparatus Download PDF

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Publication number
US3379631A
US3379631A US347613A US34761364A US3379631A US 3379631 A US3379631 A US 3379631A US 347613 A US347613 A US 347613A US 34761364 A US34761364 A US 34761364A US 3379631 A US3379631 A US 3379631A
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United States
Prior art keywords
barrel
load
tubular anode
anode
perforate
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Expired - Lifetime
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US347613A
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English (en)
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Hans Henig
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Individual
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Individual
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/16—Apparatus for electrolytic coating of small objects in bulk
    • C25D17/18—Apparatus for electrolytic coating of small objects in bulk having closed containers
    • C25D17/20—Horizontal barrels

Definitions

  • This invention concerns improvements in or relating to electrolytic apparatus. It is already Wfill known that small metal or metallic parts such as bolts, screws, and so on, can be electroplated in bulk by a technique generally referred to as barrel plating, in which the load of small metal parts is placed within a tumbling barrel or drum which is rotated in the plating electrolyte. The electrolytic deposition of a plating upon the metal parts is then effected by creating an electrical potential field within the electrolyte which causes ions from the electrolyte to plate out upon the surface of the parts and form metallic coating layers thereon.
  • the purpose of the present invention is to secure a more uniform electrolytic deposition throughout the barrel load primarily by increasing the mean potential drop 3,379,631 Patented Apr. 23, 1968 between each individual part and the neighbouring electrolyte, and by rendering the electrical field within the load more homogeneous than has hitherto been possible.
  • an apparatus for electroplating small metal parts in bulk comprising a foraminous barrel adapted in operation to receive a load of small metal parts within its interior and upon rotation to immerse that load at least partially in the plating electrolyte, one or more first electrodes disposed within the barrel, separator(s) disposed about said first electrodes to prevent direct contact of the load therewith, one or more second electrodes so disposed within the barrel as directly to contact the load of metal parts, and one or more third electrodes disposed external of the barrel, said first and third electrodes being adapted for connection to one pole and said second electrodes being adapted for connection to the other pole of a direct current source.
  • the load of small metallic parts connected via the second electrode to one pole, usually the cathode, is penetrated with an electrode of opposite sign, thus the aforesaid first electrode which is separated from direct contact with the load, and in the usual case constitutes an anode.
  • the conglomeration of small metallic parts thus has electrodes of opposite sign disposed therein, with one of which the load is in direct electrical contact and from the other of which it is separated by a perforated insulator or the like.
  • the first electrodes are preferably disposed substantially axially of the barrel, and most conveniently constitute a fixed tubular axis about which the barrel rotates.
  • the load penetration of the first electrodes can be increased by the fitting to the tubular construction one or more radially extending disc-shaped extensions.
  • the separator will advantageously comprise a perforate sheath or sleeve of insulating material disposed about the first electrode, and preferably spaced radially and concentrically about a fixed tubular electrode. This perforated sheath is best mounted for rotation with the barrel about the fixed electrode in order to prevent jamming.
  • the second electrodes are intended to make direct contact with the load and should therefore be so disposed within the barrel as to ensure that they contact the load even when the barrel is not fully charged. They should thus extend in the normal case nearly to the lowermost point, and they may most conveniently be introduced within the barrel via insulated connections carried along the axis of the barrel and then extending substantially radially therefrom.
  • the preferred construction indeed involves the insulated leads for the second electrode passing through the fixed tubular first electrode and emerging therefrom through apertures in the tube and its surroundin g sheath.
  • FIGURE 1 is a part-sectional front elevation view of one embodiment of a barrel plating apparatus taken in a vertical plane passing through the rotational axis of the barrel;
  • FIGURE 2 is a sectional view through the embodiment shown in FIGURE 1, taken in a vertical plane normal to the rotational axis of the barrel;
  • FIGURE 3 is a view similar to that shown in FIGURE 1 of another embodiment of a barrel-plating apparatus in accordance with the invention.
  • FIGURE 4 is a view similar to that shown in FIGURE 2 of the same embodiment as shown in FIGURE 3.
  • the barrel-plating apparatus comprises a barrel, generally indicated 1, carried upon support arms, 2, 3 (see FIGURE 1) and immersed wholly or partially in an electrolyte (not shown) between soluble anodes 4, 5 which are detachably secured to bus-bars 6, 7.
  • soluble anodes 4, 5 which are detachably secured to bus-bars 6, 7.
  • bus-bars 6, 7 Within the barrel 1 there is a load of small metallic parts schematically indi cated at S, which, upon rotation of the barrel in the direction indicated by arrow 9, assumes a distribution within the barrel somewhat as indicated.
  • the barrel 1 comprises hexagonal end plates and 11 between which extend perforate synthetic resin or like non-conductive material walls 12 defining the outer periphery of the barrel.
  • the wall on one face of the barrel periphery takes the form of a detachable cover 13 through which the load can be charged into barrel 1, or removed therefrom.
  • end plate 10 is provided with gear teeth 14 which can be driven (by means not shown) to rotate the barrel 1 about the tubular axis 15, carried by support arms 2 and 3, upon which the barrel is rotatably mounted.
  • the tubular axis 15 is connected directly to the positive pole of a direct current source (not shown), which is conveniently a rectifier.
  • the tubular axis 15 thus serves as an anode, and is surrounded by a perforate synthetic resin or like material sheath 16 whose ends are fixedly secured to end plates 10 and 11 and rotate therewith about axis 15, preventing the load within barrel 1 from directly contacting the anode 15.
  • cathodes 17, 18 which are connected via insu lated leads 19, 2%] with the negative pole of the rectifier or other current source.
  • These insulated leads 19 and 29 respectively both pass through apertures in the tubular anode 15 and overlying insulating tube sections 21 and 22.
  • FIGURES 3 and 4 it will be noted that this embodiment is, in general, similar to that shown in FIGURES 1 and 2 above, and similar parts are indicated with the same reference numerals.
  • the embodiment of FIGURES 3 and 4 incorporates a disc-shaped anode extension 23 disposed centrally of the tubular anode 15, and extending radially nearly to the periphery of the barrel 1.
  • This extension 23 is separated from direct contact with the barrel load by partitions 24 and 25 disposed to each side of it, formed of perforate synthetic resin or like insulating material similar to that used for the outer walls and the sheath 16, between which of course these partition walls extend, dividing the interior of the barrel -1 into two compartments into which the cathodes 17 and 18 respectively protrude.
  • Electrolytic apparatus comprising a container for plating electrolyte, a tubular anode fixedly supported in said container, a drum having end walls and a perforate non-conducting peripheral Wall mounted to rotate on said tubular anode, said peripheral wall being spaced from said tubular anode, a stationary perforate non-conducting sleeve closely surrounding said tubular anode, at least one stationary soluble electrode located in said container outside of said drum, at least one stationary cathode extending into said tubular anode and through openings in the wall of said tubular anode and in said perforate sleeve into the space between said sleeve and said peripheral wall, and being insulated from said tubular anode, and electrical connections to all of said electrodes.
  • Electrolytic apparatus as defined in claim 1, in which a conductive disc extends outwardly from said tubular anode intermediate the ends thereof and perforate non-conducting discs extend from said perforate sleeve to said perforate peripheral wall on each side of and adjacent to said conductive disc.

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)
  • Electrolytic Production Of Metals (AREA)
US347613A 1963-02-27 1964-02-26 Electrolytic apparatus Expired - Lifetime US3379631A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1963H0048373 DE1496816B2 (de) 1963-02-27 1963-02-27 Vorrichtung zum galvanisieren schuettfaehiger massenteile
NL656504736A NL152306B (nl) 1963-02-27 1965-04-13 Werkwijze en inrichting voor het elektrisch bekleden van losse metalen delen.

Publications (1)

Publication Number Publication Date
US3379631A true US3379631A (en) 1968-04-23

Family

ID=25979978

Family Applications (1)

Application Number Title Priority Date Filing Date
US347613A Expired - Lifetime US3379631A (en) 1963-02-27 1964-02-26 Electrolytic apparatus

Country Status (6)

Country Link
US (1) US3379631A (enrdf_load_stackoverflow)
BE (1) BE763396Q (enrdf_load_stackoverflow)
CH (1) CH441923A (enrdf_load_stackoverflow)
DE (1) DE1496816B2 (enrdf_load_stackoverflow)
GB (1) GB1050404A (enrdf_load_stackoverflow)
NL (1) NL152306B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974057A (en) * 1971-01-13 1976-08-10 Hans Henig Electro plating barrel
US4680099A (en) * 1986-04-07 1987-07-14 Raymund Singleton Electroplating apparatus
US20120205249A1 (en) * 2009-10-19 2012-08-16 Honda Motor Co., Ltd. Aluminum or Aluminum Alloy Barrel Electroplating Method
EP2505693A3 (en) * 2011-04-01 2013-03-06 Mitaka Seisaku Co., Ltd. Barrel apparatus for barrel plating

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541231B4 (de) * 1995-11-06 2005-04-07 Hans Henig Einrichtung zur elektrolytischen Oberflächenbehandlung schüttfähiger Massenteile in einer Tauchtrommel und Verfahren zum Betrieb dieser Einrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US617512A (en) * 1899-01-10 Apparatus for extracting precious metals from ores
GB190002159A (en) * 1900-02-01 1900-12-15 Elizabeth Morrison Improvements in Apparatus for Electro-plating Pins and other Small Objects
US1509534A (en) * 1923-06-26 1924-09-23 Hanson & Van Winkle Company Electroplating machine
US2035633A (en) * 1935-02-05 1936-03-31 Udylite Company Plating machine
US3183177A (en) * 1962-01-12 1965-05-11 Western Electric Co Electroplating barrel with current reversal means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US617512A (en) * 1899-01-10 Apparatus for extracting precious metals from ores
GB190002159A (en) * 1900-02-01 1900-12-15 Elizabeth Morrison Improvements in Apparatus for Electro-plating Pins and other Small Objects
US1509534A (en) * 1923-06-26 1924-09-23 Hanson & Van Winkle Company Electroplating machine
US2035633A (en) * 1935-02-05 1936-03-31 Udylite Company Plating machine
US3183177A (en) * 1962-01-12 1965-05-11 Western Electric Co Electroplating barrel with current reversal means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974057A (en) * 1971-01-13 1976-08-10 Hans Henig Electro plating barrel
US4680099A (en) * 1986-04-07 1987-07-14 Raymund Singleton Electroplating apparatus
US20120205249A1 (en) * 2009-10-19 2012-08-16 Honda Motor Co., Ltd. Aluminum or Aluminum Alloy Barrel Electroplating Method
US8916039B2 (en) * 2009-10-19 2014-12-23 Dipsol Chemicals Co., Ltd. Aluminum or aluminum alloy barrel electroplating method
EP2505693A3 (en) * 2011-04-01 2013-03-06 Mitaka Seisaku Co., Ltd. Barrel apparatus for barrel plating

Also Published As

Publication number Publication date
DE1496816A1 (de) 1969-07-17
DE1496816B2 (de) 1976-04-22
BE763396Q (fr) 1971-07-16
CH441923A (de) 1967-08-15
GB1050404A (enrdf_load_stackoverflow)
NL152306B (nl) 1977-02-15
NL6504736A (enrdf_load_stackoverflow) 1966-10-14

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