DE2311818C2 - Device for supplying a flux in a wire tinning plant - Google Patents

Description

in countercurrent to the gases and vapors running metered drip stream of the flux impeded will. The tube serves as a feed chute for the flux, whereas the oversized cross section of the tube for the opposite flow of gases and vapors to the flux is. For the same reason, the tube is placed at an angle to the level of the tin bath, so that the flux only wets the deep-lying vertex of the tube. The mouth of the tube is close the wall of the protective chamber located in such a way that the flux emerging from the mouth of the tube runs on the wall of the shelter to the tin bath level. In the area of the exit cone the tin bath level remains at rest.

The amount and the time interval between the dosing pulses are determined by the dosing valve. This metering valve can advantageously be controlled by timing elements and presettable. It is particularly advantageous to add a wetting agent to the flux; through this measure becomes a more even one, taking into account an unavoidable partial evaporation Incoming flow of the flux to the protective chamber guaranteed. Both the tube and the The casing of the protective chamber is made of quartz glass so that the flow of the flux is also optical can be monitored. Another transparent glass tube or quartz tube is preferably in the middle passed through a plastic stopper covering the protective chamber. For the tinned This glass tube serves as a reheating section, but also for further ventilation of the wire Protection chamber.

In the drawing, a metering device formed according to the invention is shown schematically.

F i g. 1 shows a view of the dosing device; the protective chamber is shown here in longitudinal section;

F i g. 2 shows a view from above of the covered £.; Protective chamber.

The flux-wetting agent mixture is located in a storage container 1 - referred to below only as flux. This flux arrives via a line 2 to a metering valve 3 which can be controlled by a lifting magnet 4. A timer 5 has a handle 6 for setting the allocation pulses to be used per unit of time and a further handle 7 for setting the opening duration of each timing pulse for the metering valve 3. When the metering valve 3 is opened, a predetermined amount of flux flows through the sub-line branch 9 into a tube 8 a. This tube is inclined at an angle W with respect to the horizontal; it consists of a transparent material, preferably quartz glass. The inner diameter d of the tube 8 is relatively large

ίο held in such a way that the flux 10 as in a Schute, d. H. only wetting the lower disk surface 11 of the tube, in the direction of arrow 12 to the shelter 13 flows off. The protective space wall is here in the form of a quartz glass Pipe socket 14 is formed, the lower end 14 'of which is immersed in the molten tin 15.

As in particular from FIG. 2, the tube 8 can be seen laterally through the protective space 13 covering plug 16 passed through. This stopper is made of a heat-resistant plastic educated. Centered by the Stör fen 16 is also Ventilation tube 17 made of quartz glass, through which the tinned wire 18 in the direction of arrow 19 runs upwards. This vent pipe Lt is the post-heating zone for the tinned wire. When pulling through of the wire through the tin melt is formed within the protective space 13, namely at the Exit point of the wire, an exit cone 20, which does not suffer any fluctuations during the drawing operation may. The flux preferably consisting of zinc chloride passes through the tube 8 and enters the protective space 13 near the wall 21. It wets the wall 21 of the pipe socket 14 and arrives inside the protective space 13 on the mirror 22 of the tin melt. Disturbances in the bathroom level - which could be caused by drops of the flux or a chemical reaction - are thus largely excluded. The gases forming inside the shelter or Vapors flow through the vent pipe 17 essentially in the direction of the arrows 23. A part these gases or vapors, however, also flow into the tube 8 in the direction of the arrow 24, however, Due to the oversized width of the tube, the flux can drain freely to the protective chamber non-hindering extraction of gases or vapors is guaranteed.

1 sheet of drawings

Claims (3)

If the solder bath containing liquid metal is carried out, it is also known to use an agent which dissolves tin oxide, primarily zinc chloride. 1. Device for supplying a flux. This measure is intended, among other things, to avoid the bills in a wire tinning system consisting of tin ash on the tin bath surface from a tinned wire at a distance. In devices for coating giving, partly into the molten tin, of steel strips or wires with molten immersing tube metals or alloys forming a protective chamber, using outlet or squeezing rollers, containers and a container stored in the nozzle and a molten bath storing the flux In connection with the container, it is known to surround the area of the exit point of the drain wire or tape from the molten metal with conduit leading into the protective chamber with a protective jacket located in this conduit. This protective adjustable metering valve, characterized by its jacket, partially protrudes into the weld pool; it is intended to show that the part 15 located between the Dosierven- outlet point free of the drive valve (3) and the tin melt (IS) located on the bath level will keep the impurities. In this space, formed by the or part of the drain line (8, 9) in the form of a protective jacket, a tube (8), which is open on both sides and inclined to the mirror (22) from oxidation of the bath surface, is fed in with zinc chloride of the molten tin (15). Which is formed for covering the wires or, the cross-section of which is used for the supply of the strip, exit rollers flux (i * 5) and the simultaneous discharge of the 20 remain free of impurities,
In an older patent application (German open countercurrent to the flux according to document specification 2 207 719), a device is dimensioned. wrote with the wire in a vertical direction 2. Apparatus according to claim 1, characterized upwards running through a tin bath and in which the indicates that the tube (8) from an exit source of the wire from a partially into the transparent material, preferably made of a quartz-tin bath or a pipe socket glass, and the side is surrounded by a protective chamber. In this protective chamber The stopper (16) covering the space (13) leads through the conduit of a flux metering device is. tion. The flux, namely zinc chloride, in 3. Device according to claims 1 and 2, 30 binding with the protective chamber is used to reduce characterized in that the mouth of the surface tension of the tin bath in the area Tubes (8) that austetendt flux to the wire exit point. This is one of the advance walls (21) of the Schutrraume-, (13) directs. Settlements to generate a constant, the wire sn its exit point sheathing 35 tin exit cone. This device works satisfactorily as long as the flux supplied to the surface tension of the tin bath within the protective chamber always reaches the surface of the bath uniformly and in dosed quantities. From the The invention relates to a device 40 tin bath, however, rising vapors get into the supply of a flux at a wire supply line of the metering device, so that the tin-plating system, consisting of a, the tin-plated supply of the flux is not always evenly surrounding the wire at a distance, partially in the tin follows. This has the consequence that the upper melt is also immersed and forms a protective chamber - surface tension within the protective space, i.e. the pipe socket and one that supplies the flux in the vicinity of the wire exit point, changes the advising container as well as a container connected or disconnected with the container. the tin layer on the tinned wire is therefore subject to discharge fluctuations which are bound into the protective chamber.
Line with one located in this line The invention is based on the object of the imaginable metering valve. to avoid the disadvantages mentioned; It is a pre-The continuous plating of a copper wire 50 direction for supplying a flux at a tes with a thick solder layer of tin or mixed wire tinning system to be created, which is a tin is known. The wire is in this case in a largely even supply of the flux in the right or almost vertical direction up the protective chamber of the wire tinning system through p.in solder bath and then through a, which is possible. This object is achieved according to the invention, coating thickness regulating element with all-round 55, in that the play between the metering valve is performed. In a known device for and the molten tin located part or a part of continuous coating of a copper wire of the drainage line in the form of a bilateral open, the wire is passed through a suction nozzle, directed obliquely to the level of the molten tin, which the wire is formed with a predetermined lateral tube , the cross-section of which enters the device for a play of about 0.4 mm; He 60 drove the flux and at the same time discharged it then passes through a countercurrent section in which the vapors that form in the protective space in the liquid solder from a solder bath container are correspondingly measured against the counterflow to the flux. Wire movement direction flows. Ultimately, this structural design of the metering wire leaves the solder bath through a AbstreifdUse, which the device is accomplished that surrounds the above the wire with a lateral clearance of at least 65 molten tin, within 0.2 mm. Protective chamber, formed gases and vapors To coat metal strips and wires over the tube, which is kept wide in its diameter, tin or mixed tin, whereby the wire can flow freely through a dien without the