SU1289910A1 - Device for applying coatings on long articles - Google Patents

Abstract

This invention relates to coaters for long products. The purpose of the invention is to increase productivity and enhance functionality by ensuring the application of two-layer coatings. The bath 1 is fed with a melt 2 of the coating material. Through the holes 5 in the plates 4, the treated wire 6 is passed through. The bottom 3 of bath I, made in the form of bellows, is brought into reciprocating vertical movement with the operating frequency. Due to the tight coupling between the bottom 3 and the auxiliary element 7, the level of the melt in the capillary system changes synchronously with the movement of the bottom 3, and reaches its predetermined level due to the change in the level of the melt 2 in the bath 1 and the change in the width of the capillaries. The dog "e (lu 00; e

Description

Periodically with a given frequency, wetted by the wire 6 with the melt, intermittent two-layer coatings are applied. Constructions set1

The invention relates to equipment for metalworking, and in particular to devices for applying continuous and intermittent coatings on long products of molten metal, and can be used in the electrical, electronic industry and mechanical engineering.

The purpose of the invention is to increase productivity and enhance functionality by ensuring the application of two-layer coatings.

 The drawing schematically shows the device, the overall view.

The device consists of a fixed bath 1 for the melt 2, the bottom 3 of which is made in the form of a sylphon with the possibility of reciprocating vertical movement and is connected with a drive of vertical movements (not shown). A capillary system is formed above the melt surface, formed by two plates 4 rigidly mounted at an angle to each other with coaxial holes 5 for pulling the wire 6 and an auxiliary element 7 placed in the gap between the plates 4, in the form of a geometric body of variable cross section, for example a wedge having a through cavity 8 coaxially with the holes 5 in the plates 4. On the side surfaces of the auxiliary element 7 are mounted adjacent to them and having the ability to move on them are sealed elements 9, made of non-wettable melt material. Moreover, the sealing elements 9 are pressed with constant force to the auxiliary element 7 by means of the spring system 10, and the auxiliary element 7 is rigidly connected to the bottom 3 of the bath 1 by means of a rod 11, the length of which is adjustable depending on

The properties provide the application of two-layer coatings from various melts, both intermittent and continuous coatings. silt

from the initial level of the melt 2 in the bath 1 by means of a stopper element 12 mounted in the bottom 3 of the bath 1. In cases when oxidizing metals or alloys are used for coatings, it is advisable to protect the inlet and outlet openings of the plates 4 with an atmosphere of neutral gas. To do this, the plates 4 are coaxially with holes 5

The dp of drawing the wire 6 is fastened in a known manner to metal tubes 13 and .G4, inside which an atmosphere is created from a neutral gas, for example from argon or nitrogen. For

prevent melt surface

from oxidation cooling and vibrations on the surface of the melt 2, a plate 15 with an opening for accommodating a capillary system is located. Plate 15 is made of meteriala, with a density below the density of the melt and not interacting with it.

The device works as follows.

Melt 2 is fed to the bath 1 with the capillary system installed to the specified level, the temperature of which is maintained at the required level. Through the capillary system in

in the horizontal direction, wire 6 having a high-quality surface is passed to ensure good adhesion of the coating, and is driven at a predetermined speed. Stamps5 and guides (not shown) center the wire 6 as it passes through the working holes 5 of the capillary system. The gap between the wire 6 and the holes 5 in the plates 4, the sealing elements 9 is such that when the wire 6 passes through them at working speed, the melt does not flow between the wire 6 and the corresponding elements of the capillary system. it

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is achieved by the implementation of elements ka. a pill system of a material not wetted by this melt 2. The bottom 3 of bath 1, made in the form of a sylph, brings back and forth my vertical movement from a drive (not shown) with the operating frequency. Due to the rigid connection between bottom 3 and by the auxiliary element 7 in the form of a wedge, the level of the melt 2 in the capillary system changes synchronously with the movement of the bottom 3, and reaches its predetermined level by changing the level of the melt 2 in the bath 1 and changing the width of the capillaries. Thus, intermittent coatings are applied periodically, wetted by wire 6, at a predetermined frequency. The design of the capillary system provides coating in two stages. At the first stage of deposition, due to the high speed of the wire 6, reaching 10 m / s and 2-3 times higher, the contact time of the wire 6 with the melt 2 reaches hundredths, thousand fractions of a second, which contributes to the cooling of the thin film of the melt 2, being covered with wire 6, at a speed of 10 degrees / s, due to intensive heat transfer by thermal conductivity from melt 2 to wire 6. When cavity 8 of auxiliary element 7 passes, the coating cools further and melt 2 contacts wire 6 due to lowering bottom 3 of the bath 1. In the second stage of coating, the melt 2 is applied in the same way, but already in the coating formed in the first stage. The cooling rate of the coating in the second stage reaches 10 degrees / s, which is enough to produce a crystalline or even amorphous structure in the coatings, and this ensures the production of products with a given gradient of properties. Depending on the required length of the discontinuous coatings, the gap between them, the thickness of the coatings synchronize the speed of movement of the wire 6, the frequency of oscillation of the bottom 3, and also set the auxiliary element 7 of the capillary system to a predetermined gap by moving it in the vertical direction and fixing it in the locking element 12 mounted in the bottom 3 of the bath 1, the device allows you to apply continuous

digging, it’s enough to move bottom 3 in the direction of the capillary system and fix it, as well as get continuous and discontinuous

one stage coverings

It is sufficient to remove one of the plates 5. To prevent the wire 6 from oxidizing, an inertial gas, such as argon, is fed into the tubes 13 and 14.

The constructive implementation of the cil- lary system provides the device with the possibility of implementing flexible technological processes. In particular, if it is necessary to apply two-layer coatings of different materials, then the single-chamber bath is ground onto a two-chamber one. A material that feeds the capillaries is placed in each of the chambers. By pulling the product in this way, the interrupted coatings are bilayer. Upon receipt of intermittent coatings from the same material, the device allows forming coatings with a gradient of properties through the implementation of two-stage deposition, for which the product transfer speed and the frequency of movement are synchronized depending on the length of the intermittent coatings and the interval between them.

The design features of the device provide intermittent single-layer in two stages and two-layer coatings with a given gradient of properties with high performance, which exceeds the performance of the base object by 15-30% due to the reduction of the lift cycle - lowering the melt level in the capillary system due to synchronous change in the width of the capillaries with the movement of the bottom of the bath.

Claims (1)

Invention Formula A device for coating long products with a bath for a melt, the bottom of which is capable of reciprocating vertical movement, characterized in that it is equipped with a capillary to increase performance and enhance functionality by ensuring the application of double-layer pockets a system made in the form of two plates with holes and sealing; ele512899106 rigidly installed under the wedge surfaces parallel to the plasti-angle to each other, and the auxiliary units are installed with the possibility of an transverse element in the form of a wedge through the wedge relative to the wedge by a sealed cavity coaxially with holes the wedge is rigidly plates, while on the side-5 it is connected with the bottom of the bath.