SU1216259A1 - Apparatus for electroplating treatment of small parts - Google Patents

Description

The invention relates to electrical engineering, in particular to devices for applying bright coatings to plastic buttons or other plastic fittings in bulk.

The purpose of the invention is to increase the reliability and service life of the device.

Figure 1 schematically shows the proposed device; figure 2 is a view of And figure 1; FIG. 3 is a section BB in FIG. 2 (a node for connecting a flexible shaft and braids concentrically arranged around it, as well as a flexible hose with a collector of the current collector); Fig, 4 is a section bb In figure 1; on fig.Z - the device of the cathode wire.

The device comprises a drum 1, a drum rotation drive consisting of an electric motor 2 of a gearbox 3, gears 4-6, a cylindrical perforated anode 7 with a cover 8, an anodic current lead 9 associated with the anode sthanga 10. Around the anode 7 there is a perforated protective cylinder 11 of dielectric. The articles to be coated are located between the cylinder 11 and the walls of the drum. In this gap is the cathode 12, made in the form of rods 13, having at one end end splines 14 for a screwdriver and a plug 15 for inserting into the drum wall, and at the other end - a threaded shank 16 and facing shoulder 17 for reliable connection and tight contact with a cathode disk 18 rigidly connected to the hub 19. In order to prevent electrolyte from entering, the cathode disk 18 and the hub 19 have a hermetic one-piece casing 20, for example a molded one, of vinyl plastic. The cathode 12 is connected to the cathode rod 21 by means of a current collector 22 and a current-carrying wire 23. The current collector 22 consists of a collector 24, brushes 25, a holder body 26, an axial guide 27 and a base 28 fixedly mounted on. cathode rod 21, all of these elements have a reliable electrical connection with each other and ensure good contact and good current transfer capacity.

The current lead is an armature, in the center of which there is a flexible shaft 29, and around it concentrically freely with the necessary clearance are braided 30 of flexible copper wires, the ends of which are 20

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Png from opposite sides in parallel and rigidly connected to the tips 31 and 32, for example by soldering, and using threaded

J connections are connected to the hub 19 of the cathode disk 18 and to the collector 24 of the current collector 22.

In order to prevent the electrolyte from getting in, the wire is supplied with an airtight corrugated flexible hose 33. The flexible shaft 29 is made of an even number of spring spirals 34 concentrically interconnected, half of which, because of the spirals, have opposite winding, which guarantees high elasticity and resistance to torsion in any directions x.

The set of braids 30 concentrically arranged around the flexible shaft 29 ensures the conductor's high current-carrying capacity, constant elasticity and durability.

The device works as follows.

The drum 1 is loaded with fine lightweight parts, such as buttons, and is installed with the help of rods 10 and 21 in galvanic bath supports (not shown), ensuring the supply of the necessary voltage to the anode and cathode rods. The motor 2 is turned on, and the drum 1 begins to rotate in the electrolyte solution. Simultaneously flexible shaft 29 thanks

35 of its high elasticity and rigid connection with the bar, Anom freely transmits the rotational movement to the conductor 23 and the collector 24, easily overcoming the friction forces of the spring-loaded brushes 25 that are tightly in contact with it, which guarantees reliable contact and good current transfer capacity, and concentricly arranged braids 30 thanks to good their elasticities easily effortlessly freely move relative to the shaft 29 in places of its bending within the prescribed gaps, excluding in the wire the combined voltages and 50 iru high durability.

When the drum 1 rotates, the buttons are suspended and come into contact with the inner cathode rods 13, are passed through

55 electric current, as a result of which metallization takes place with a high quality of coating their surface, for example, nickel plating. High

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The quality of the product coating is achieved by ensuring a stable load current flowing through the anode rod 10, anode conductor 9, anode 7, buttons, internal cathode rods 13, cathode disk 18, hub 19, flexible shaft 29, braid 30, tips 31 and 32, collector 24 brushes 25, brush holder 26, base 28, and cathode rod 21. Load current stability is achieved by using internal cathode rods, a cathode disk with a hub, and a combined wire that are constantly rotated but and there is a sufficiently strong electrical connection between them, taking into account the high current capacity.

The size of the coating layer depends on the time of the technological process.

After the completion of the technological process, the drum is removed from the electroplating bath solution, and the treated buttons are poured into the container for shipment. Thereafter, the vacated drum is again filled with buttons and immersed in the plating bath solution. Then the process is repeated as described except for the fact that

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that after several such working cycles, the inner cathode rods must be removed from the drum in order to remove the nickel accumulated on them, since they are in use and must be in direct contact with the products being processed, for example buttons. Due to the fact that at the ends of the inner cathode rods there are slots for a screwdriver, they are quickly removed with minimal time loss from the drum, i.e. ejected from the cathode disk, and in their place pre-prepared other cathode rods are screwed. Learning that the cathode rods are round, the nickel that has accumulated on them is easily removed using a tool, for example, on a lathe. The stripped nickel from the cathode rods is returned for subsequent use in the process, 5 which significantly saves material costs.

Thus, due to the proposed design of the cathode and the cathode current lead, it was possible to significantly improve the durability, reliability and performance of the device.

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Compiled by I. Saakova Editor S. Patrusheva Tehred T. Tulik Proofreader V. But ha

Order 965/32 Circulation 615 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Branch ShSh Patent, Uzhgorod, st. Project, 4

Claims (2)

1, DEVICE FOR ELECTRICAL PROCESSING OF SMALL PARTS, containing a bath, a drum with a drive, an anode, a cathode made in the form of dis. with rods mounted on the hub, and a current lead in the form of an insulated wire placed in a flexible hose, one end of which is rigidly connected to the cathode of the drum, and the other to a current collector made in the form of a collector with brushes, characterized in that, in order to increase reliability and service life of the device, the wire is combined, its central part contains a flexible shaft, and the outer one consists of braids of copper flexible wires concentrically freely located with a clearance gap, the opposite ends of which are parallelly connected inenes with tips and are rigidly connected to the collector of the current collector and to the hub of the cathode disk, while the hub and cathode disk have a solid electrical insulating sheath, and the cathode rods from one end have an end slot, and on the other a threaded shank with an end shoulder for tight connection with cathode disk. 2. The device according to claim 1, which is characterized in that the whole electrical insulating sheath is made of dielectric material. >