DE2165614A1 - DEVICE FOR CONTINUOUS PLATING - Google Patents

Description

21656H

Dr. F. Zumsteln sen, - Dr. ΕΞ. Asomann Dr. R. Koenlgsberger - Dipl.-Phys. R. Holzbauer - Dr. F. Zumsteln Jun.

PATENT LAWYERS

TELEPHONE: COLLECTIVE NO. 225341

TELEX 529979

TELEGRAMS: ZUMPAT CHECK ACCOUNT: MUNICH 91139

BANK ACCOUNT: BANK H. HOUSES

8 MUNICH 2.

BRÄUHAUSSTRASSE 4 / III

Case P 1226-51 5 / th

NIPPON KOKAH "KABUSHIKI EAISHA, Tokyo / Japan Continuous plating device

The invention relates to apparatus for continuous plating, and more particularly to apparatus for relative small pieces.

It is known that the most suitable devices for a continuous treatment of metallic material of great length, such as strips, wires or the like, by, for example, pickling, cleaning, polishing, coating, plating, rinsing etc. have been developed and used in practice are. At present, however, the above treatments are carried out in batches on relatively small parts such as bolts, nuts, screws, joints, etc., and this treatment cannot be carried out continuously. When small parts are treated in this way, the production _{efficiency f} decreases and the vicinity of the treatment site is polluted by evaporation of harmful gases or constituents. At the same time, there is a problem that the treatment may be uneven.

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The invention is directed to overcoming the above disadvantages and difficulties.

The features of the invention reside in a closed device having an inlet and an outlet and a helical rib and solid protrusions on the inside of one cylindrical body of the device which is rotated and into which small parts are introduced through the inlet, one being continuous plating in a uniform and reliable manner as it passes through the cylinder during rotation of the Cylinder itself is made possible

The invention relates to an apparatus for continuous Plating relatively small parts reliably and evenly. The productivity effectiveness should be high, and contamination of the area around the treatment site be avoided.

In the following, for example, preferred embodiments of the invention are explained in more detail with reference to the accompanying drawings.

Fig. 1 shows a section through an embodiment of the invention;

Fig. 2 is a partial section of the inside of the cylindrical body according to Fig. 1j

Fig. 3 is a partial section of the negative pole area according to FIG. 2.

One embodiment of the present invention is shown in FIG. The reference numeral 100 refers to a cylindrical one Body or cylinder. This cylinder is supported on the base plane A by suitable devices, not shown and is rotated in the horizontal direction by a suitable drive device 8, which is on the outside 102 of the cylinder. 100 is provided, the driving force coming from a suitable external driving source, not shown. The reference number 1 relates to a loading device for the small parts

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_3- '2185614

"and the electrolyte for plating, which is held by a holder 32 and with a lug 1 ^f engages 100 in the lower region of the loading device in an annular recess 105 on the inlet side 103 of the cylinder. The charger is connected to the cylinder 100 so that it does not hinder the rotation of the cylinder 100. The reference number 3 refers to an automatic pressure control device which is mounted on the base plane A and is in communication with a suitable pressure generator, not shown, via a line 46. In this way, compressed air or the like passed from the control device 3 into the control chambers 2 and 22 through the lines 4 and 6.

The reference numeral 5 refers to a discharge device which is arranged on the outlet side of the cylinder 100 and is held by brackets 107 and 104 and has the same function as the above-mentioned charger 1. Of the lower area 13 of the unloading device branches into two branch areas 131 and 132. The treated products fall into a receiving tank 15 via the branch pipe 131, and the remaining one Solution is directed to another tank 20 via the other branch line 132.

The internal mechanism of the cylinder 100 will be described below will. Numeral 21 refers to a positive pole passing through the center of the cylinder 100 from the Inlet side 103 extends to outlet side 104 and is connected to an external power source, not shown. Numeral 10 denotes a helical rib that is continuous is provided on the inside 101 of the cylinder 100 from the inlet side 103 to the outlet side 104 and has the desired pitch and height. Numeral 16 refers to a continuous, helical hat and the reference number 9 denotes a projection which is on the inside 101 of the cylinder 100 in each case on the bottom of the ^ Groove 16 is attached. The reference number 19 refers to a negative pole arranged on the inside 101. This negative pole 19 comes via a line ring 18, the

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is provided on the outside 102 of the cylinder 100, in contact with a clamp 17 of a cable reel 11, which is on the Base level A is attached. In this case it is the negative pole 19 connected to the Iieitungsring 18 via supply wires 191.

If now the parts to be treated under the action of the pressure control chamber 2 are loaded into the helical hat 16, they can by the forward force in which the helical motion is converted to be moved forward. Since the introduced parts face each other on the bottom of the hat the ground level A accumulate depending on their weight, they do not rotate in spite of the rotational movement of the cylinder 100. Therefore, these parts are increased by a constant amount in uniform sequence when the cylinder 100 is rotated. When said groove 16 with the electrolyte or the required solution is filled at a suitable height and the power source is switched on, the parts can plated or treated as desired. In this case, the projections 9 contribute to turning the parts over Rotation of the cylinder 100 at. Due to this turning process, the parts are plated evenly or in the desired manner treated.

Then the treated parts are received by a suitable, not shown receiving device when they reach the outlet side 104 reach and be poured into the device 14. Then the parts and the remaining solution are separated fed into tanks 15 and 20.

The following are embodiments of the present invention reproduced

Example 1: copper plating

Starting material: 1/4 "steel nuts

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Electrolytic conditions copper sulfate (g / l): 200 sulfuric acid (g / l): 50 current density: 1.5 A / dm solution temperature: 25 ⁰ G

working conditions

Dimensions of the cylinder

Inner diameter: 0.7 m

Hat division: 0.5 m

Length: 40 m

Speed: 1.5 rpm Load quantity: approx. 100 kg / slot

After fifty minutes the steel nuts were plucked taken in an amount of 100 kg per revolution of the cylinder. The electroplated copper layer of 8 ^ u was good Uniformity and quality.

Example 2: Nickel Plating

Starting material: steel spoons and forks

Electrolytic conditions Nickel sulfate (g / l): 300 Nickel chloride (g / l): 45 Boric acid (g / l): 40 Current density: 10 A / dm Solution temperature: approx. 70 ⁰ O

working conditions

Dimensions of the cylinder

Inner diameter: 0.7 m

Groove rope: 0.5 m

Length: 20 m

Speed: 2 rpm Load quantity: approx. 100 kg / slot

After twenty minutes, the nickel-plated steel spoons and forks were in an amount of 100 kg per revolution of the

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Taken from the cylinder. The electroplated nickel layer from ta was of good quality and uniformity.

Example 3: chrome plating

Starting material: the nickel-plated steel spoons

and forks of the example Electrolytic Conditions

Chromic acid (g / l): 250

Sulfuric acid (g / l): 25

Current density: 30 A / dm ²

Solution temperature: about 5O ⁰ C

working conditions

Dimensions of the cylinder

Inner diameter: 0.7 m

Groove pitch: 0.5 m

Length: 4 m

Speed: 1 U / min Load: approx. 100 kg / slot

After eight minutes there were chrome plated spoons and forks with excellent gloss in an amount of 100 kg per revolution of the cylinder. The electroplated chrome layer of yu thickness was of good and uniform quality.

Example 4: Electroplating

Starting material: 1 "steel nuts Electrolytic conditions

Zinc cyanide (g / l): 60

Sodium cyanide (g / l): 40

Sodium hydroxide (g / L): 80

Zn (g / l): 33

Current density: 5 A / dm ²

Solution temperature: 3O ⁰ C

working conditions

Dimensions of the cylinder inside diameter: 0.7 m Groove pitch: 0.5 m

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Length: 40 m
Speed: 1.5 rpm
Load amount: about 100 kg / slot

After fifty minutes, the galvanized nuts were in a Amount of 100 "kg taken per revolution of the cylinder. The electro-galvanized layer of 25 ρ v / ies a good quality and uniformity.

Example 5 : Electro-aluminizing

Starting material: 1/4 "steel nuts, electrolytic conditions

Aluminum chloride anhydride: 60 moles of sodium chloride:. 25 moles of potassium chloride: 15 moles

Current density: 10 A / dm
Solution temperature: 160 ⁰ C

working conditions

Dimensions of the cylinder

Inner diameter: OJm Hat division: 0.5 m Length: 40 m

Speed: 1.5 rpm
■ Load quantity: approx. 100 kg / slot

After about fifty minutes, the aluminized nuts were removed in an amount of 100 kg per revolution of the cylinder. The 15M electro-aluminized layer was of good quality and uniformity.

In all of the processes described above, only a small amount of harmful gases and components were produced, so that good ambient air was retained · ^;

These examples relate to electroplating relatively small parts. However, the invention is also applicable to other treatment methods such as cleaning, polishing and the like applicable. In addition, several chemical treatments can be

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dependent on each other if the cylinder is in If necessary, it is divided into sections.

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Claims (1)

Claims 1. Device for continuous plating, characterized by a in the horizontal direction rotatable cylinder provided with inlet and outlet means and closed as a whole by an inner one Mechanism in the cylinder that has a continuous helical rib from the inlet to the outlet Protrusions that are on the inside of the cylinder at the bottom each of the hats are attached to the ribs, as well as by, a negative and a positive pole, which are arranged on the cylinder. 2 · Device according to claim. 1, characterized in that that the locking devices comprise a pressure control chamber 3 · Device according to claim 1, characterized in that the positive pole through the center of the Cylinder runs from the inlet side to the outlet side and that the negative pole on the inner wall of the cylinder is in front is seen. 209884/1159