SU931816A1 - Current-conducting roller - Google Patents

Description

(5) CURRENT CURRENT

I

The invention relates to electroplating and can be used in workshops where coating units for metal strip and tape are used.

Known rollers of electrically conductive electroplating material that engage with the strip and have circumferentially grooves or brushes 1 3

Such rollers, being immersed in an electrolyte, are quickly overgrown with dendrites and require frequent cleaning of the surface from the settled metal.

Closest to the proposed technical entity is a contact roller with conductive segments. The contact roller contains an axis with a supply of electric current and / isolated from each other conductive elements located on its surface, and constituting several segments. The contact roller has an axis with an electrical supply: of which current. Power is supplied to each segment by electric current only when the tape being covered is in contact with the entire surface of the segment during its passage through the electrolytic bath. Such a device prevents the overgrowth of the surface of the ralik by dendrites when metal coatings are applied to the sheet material in the event that

10 sheet width equal to the length of the roller segment t23-

In practice, the width of the material being processed may vary in large

15 range. In this case, the service life of the contact roller with conductive elements in the form of segments decreases sharply. When machining a metal band edge strip

Claims (2)

20 quickly overgrown with dendrites. In addition, the supply of electric current to the segments in contact with the tape, E known solution is very difficult. 393181 The purpose of the invention is to increase the service life and simplify the design of the conductive roller for the electroplating bath. The goal is achieved by those. f that in the conductive roller for an electroplating bath containing an axle with an electric current supply and isolated current-carrying elements located on the top of the roller, the conductive elements on its surface are made in the form of square cells with closed elastic nonconductive gaskets located between the cells and the roller axis, with js part of each cell facing the axis of the roller provided with an electrical contact. In addition, a gap is made between the contact and the axis of the roller, and at movable in the radial direction of the y-trivial. FIG. 1 shows a conductive roller, general view; in fig. 2 shows a current-conducting element of a current-conducting roller; node I in FIG. 1.25 The conductive roller consists of an axis 1 with slip rings 2 for supplying an electric current corrector. Axis 1 having installed the supports 3. The conductive elements are made in the form of square cells 4. The cells are separated from each other by insulators 5. A closed elastic spring is installed between the cell and the axis 1: non-conducting gaskets 6. The cells i. Have electric contact 7. The contact 7 and the axis 1 have a gap 8 by contact. Figure 1 shows the metal strip 9 being processed and: 3a11 (it is: coating tO of the edge of the gauge. The cable roller works the same way. The metal tape 9 bends around the roller. In this part the surface of the roller roller is in contact with It is 9 which, due to the tension effect, exerts a pressure P on the cells (Fig.2) 1 The pressure P causes deformation of the locking elastic nonconductive projectile 6, the gap 8 between the electrical contact 7 and the axis t of the roller is selected and the cell enters the electric 50 contact with the axis, ensuring the supply of electric and iron current to the tape. Thus, only those cells that are subjected to pressure are supplied with electric current. ss When moving a metal tape 9 with a rotating roller, the cells 4, 64 under pressure tape are periodically connected and automatically disconnected, according to estimates, of the elasticity of the gaskets 6 ,. when the cell leaves the strip. The proposed design of a conductive roller for an electroplating bath, compared with the prototype, increases its service life and simplifies the manufacture of a conductive roller with square cells, which allows processing tape of almost any width without overgrowing the conductive parts of the roller with dendrites of the deposited metal; The simplicity of the generous roller design provides for the necessary connection and disconnection of conductive cells under the effect of a strip on them. The roller can be used with virtually any tension of the tape, changing the compliance of closed elastic nonconductive gaskets and the size of the gap between the electrical contact of the cell and the axis {ylika .. Closed elastic and smoothing pads prevent the electrolyte from penetrating into the zone of electrical contact of the cell, which is taK) Ke increases the service life of the role of “a; The roller is assembled from simple-shaped, cheap parts of the same type when worn. The proposed conductive roller for electroplating vanilla eliminates the filling of the surface with dendrites of the metal of the deposited metal and reduces the downtime of electroplating units by an average of 1.5 hours per day .; Claims of the Invention A current and a roller for an electroplating bath containing an axis with an electric current supply and insulated from each other current-carrying elements located on the surface of the roller, characterized in that, in order to increase the service life and simplify the design of the roller, the current-carrying the elements on its surface are made in the form of square cells with closed non-conducting strips located between the cells and the axis of the roller, and the part of each cell facing the axis of the roller is equipped with they contact, moreover, between the contact roller and the axis of a gap, and with cheykaustanovlena vozmozh59318164. radial displacement. 1. UK patent, IP. go .C 7B, pub. 1973. Information sources, 2. French application (D 227986, taken into account in the examination of CL. C 25 D 17/12. 1976.