DE307406C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

ι Kk

According to the present invention, the Production of metal coatings by centrifuging the liquid, finely atomized metal on the workpiece in such a way that the liquefaction and atomization The metal vapors and metal fumes released by the metal are forced to work on the metalization work of the workpiece to participate, d. H. i.e. the effect of coating the workpiece with metal to support. .

So far it has been the case that the spraying of the metal next to it swirling around and bouncing off the workpiece Metal dust also formed metal fumes and metal fumes to a considerable extent, only to that extent Attention paid to when one was anxious to see this as an annoying byproduct and to reduce processes regarded as undesirable metal loss as far as possible or by immediately sucking off and carrying away the dust and vapors to the at least to protect the operating worker from inhaling the same.

If the spray material to the spray gun z. B. supplied in wire form or rods and melted by an oxyhydrogen flame according to the progress of the work, so develop in the .Melting degrees of all metals greatly exceeding Temperature of the flame naturally

'Tall fumes to a considerable extent. Though these metal vapors become at the same time with the pressure means and the molten metal particles thrown at the workpiece, but bounce off here and are caused by the expanding pressure medium driven into the air space surrounding the workpiece, in which they condense quickly with the strong cooling and become a fine metal skin on those enclosing the - airspace Surfaces. and knock down the bodies housed in it. ;

But also from the liquid ¹ ; Fine metal particles that have already left the nozzle, which are thrown onto the workpiece by the pressure medium and partly rebound from it, develop metal fumes, especially in metals with a lower melting point such as zinc, tin, lead, aluminum, etc. They also strike Like, the metal vapors consistently do not settle ₍ on, the workpiece, but on the naturally colder surfaces of the spray chamber surrounding the workpiece at more or less large distances and are thus wasted uselessly.

The task of the present invention is to create change here. : _J; ./■.■

In patent 307,378 laid down method has been proposed in the metallization of ^metal: the workpieces by: While in the already that tällkleinteilen within a container, the spectrum released by the sputtering of the liquid metal Därnpfe and Schwäden in such a way to exploit with, - lets your accumulation zone swirl through. These; Effect

to a certain extent automatically through the idea on which the invention is based, the spraying process during the free fall of the disordered objects

"5 objects of the ^e container loading.

In the case of the present task, however, it is a question of individual or a plurality orderly fed to a container

ίο workpieces during their movement so too metallize that at the metallization work the entirety of those who are capable of im Spray jet developed metal components takes part. ,.

To the end is according to the invention in. Proceed in such a way that the metal vapors, fumes and clouds of dust, which are suitably prevented from escaping from the vicinity of the work piece, are forced to wash around the work pieces fed to the spraying point either on the way to the latter or away from it or on both routes, with this effect either only through the movement of the workpieces or through a proper movement, ¹ z. B. a circulation of the vapors and fumes or finally by thermal influences ¹ can be promoted.

Is it z. B. about galvanizing,

30- tinning, bending us \ v. of metal plates (strips, panels, strips), the same can be carried out nlit advantage in such a way that, as Fig. 1 of the accompanying drawings shows schematically, the workpiece a, which z. B. abrojlt from a roll b , moved slowly forward between pressure rollers c and fed to a flat, elongated, preferably ^v closed container e, the inner walls of which are heated by suitable heating devices d and in which the nozzles of the spray guns f the workpiece transversely to its direction of movement irradiate. All metal dust, metal vapor and metal fumes released in the process. 45 now remains enclosed in the narrow container space and is thus deposited on the workpiece moving slowly between pressure rollers gh , an effect which can be supported by the fact that the vapors, fumes and clouds of dust are kept in rapid motion by a circulation device. The workpiece. then rolls up again on a drum i after it has emerged from the container.

The pressure rollers gh, the contact pressure of which can optionally be kept controllable, compress and level the metal skin applied to the workpiece in the manner described above.

In a similar way, the metallization of wires, ropes, cables or other elongated bodies of round or prismatic profile go ahead.

Fig. 2 of the drawing shows schematically a device for metallization in plan of wires, which has the following properties.

From a number of coils k, which in their coil carriers I can be ^{rotated around 1} the coil axis, but whose coil carriers are at the same time also rotatable about a pin m perpendicular to the coil axis, the workpieces are transported via guide rollers η in a parallel direction and as closely as possible next to one another in turn to a narrow, closed, heatable container e , inside which the nozzles of the spray guns f extend. The coils rotate with their associated coil carriers during the forward movement of the wires around the pins m, so that the wires also perform a rotating movement in addition to a forward movement. At the outlet end of the container, the wires are in turn brought via guide rollers 0 tax to the take-up reels p , which are set up in the same way as the supply reels and rotate synchronously with the supply reels.

One of the released vapors, fumes and clouds of metal dust, in a cycle the container driving circulation device j ensures that the action of the Spray jet is supported in the manner already described. Of course are also suitable pressure rollers again,. between which the wires wander, arranged to compress and level the metal coatings on the wires to effect.

The measures proposed in the above shall _be> observed when the metallization of other workpieces.

Claims (2)

Patent Claims: 1. Process for the production of metal coatings by spin coating fine atomized liquid metal on the moving in a container Workpiece, characterized in that The hindered from escaping from the vicinity of the work piece metal no fumes, Sctwaden and dust clouds are forced to flow around the spray body arranged fed workpieces either on their W ^e S ^{e to} the latter or away or both paths, this effect either only through the movement of the workpieces or also through ■ a proper movement, z. B. a circulation of the vapors and fumes or by thermal influences is promoted 120 '. 2. The method according to claim 1, characterized characterized in that the workpiece brought into sheet strips or wire form between suitable transport devices and the interior of a not too spacious, stretched and preferably closed heatable container supplied and there the irradiation through 'the spray nozzles is exposed, whereby the released Metal fumes, fumes and clouds of metal dust inside the container with the moving workpiece remain in constant contact, and furthermore the metal coating "of the adjustable between Pressure and transport means of moving workpiece are equalized by the last one and is condensed. 3, method according to claim r and 2, characterized in that the wire, Rope or tape form located, unwinding from spools and winding on spools Workpieces also move around themselves during their forward movement perform, where they are placed next to each other and parallel to each other during the spraying process. pass through aisle container .; 1 sheet of drawings, berlin: printed in the heichsdruckerei.