SU558713A1 - Polymer Coater - Google Patents

Description

one

The invention is applied to a dispersed polymer coating technique.

A device for applying polymeric coatings is known, comprising a housing made with a gas dispersion feed channel of a material being applied and a charging unit l. In the known device, the charging unit for the powder is located in the spray nozzle of the nozzle type, while the electrification of the powder occurs due to the impact of particles on the electrifying surface of the charging unit. The known device does not provide a sufficiently high degree of electrification of the powder.

The purpose of the invention is to increase the charge of the particles applied to the material.

This goal is achieved due to the fact that the charging unit is made in the form of rotary electrodes coaxially installed with the possibility of rotation in opposite directions, which form a gap between them, communicating with the gas dispersion channel of the applied material.

The rotor electrodes are made in the form of impellers. Internal rotary electrode

in the form of a screw, and outer in the form of a drum connected to the drive with blades on the inner surface.

The inner rotor electrode is an end muffled pipe with tangentially responsive outlets, and the outer one is a drum with blades on the inner surface.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 and 5 — embodiments of rotor electrodes; in fig. 4 and 6 - sections BB and BB; in fig. 3 and 5, respectively.

Claims (4)

The device includes a housing 1 with a handle 2, made with a channel G for supplying gas dispersion of the applied material, coaxially arranged rotor electrodes 3 and 4, covering their guide nozzle 5, a mixer 6 with an outlet nozzle 7, connected by means of shlag 8 to an air collector 9 and a bath 10 fluidization. A valve 11 is installed on the hose connecting the mixer to the air collector. The device 12 has a valve 12. The external rotor electrode 3 is located in the supports 13, and the internal electrode is freely seated on the axis 14. In FIG. 1 and 2, the outer and inner electrodes are made in the form of knuckles, the direction of the blades of which ensures their rotation in opposite directions. FIG. Figures 3 and 4 present a system of rotor electrodes, where the internal rotor electrode 4 is formed in the form of an auger, the rotation of which is effected by passing an air-powder mixture on its surface. The outer electrode 3 is made in the form of a drum, which has on the inner surface of the blade and is equipped with an individual drive, ensuring the rotation of the drum in the direction opposite to the direction of rotation of the screw. FIG. Figures 5 and 6 show a system of rotor electrodes in which the inner electrode 4 is made in the form of a nozzle plugged from the end, having four tangential holes with nozzles (not indicated in the drawing), and an outer 3 in the form of a drum with blades on the inner surface. During the passage of the air-powder; mixing through the nozzles, the reactive force is rotated electrode 4. The device works as follows. Polymer is poured into the bath 10 under the porous partition which serves compressed air or gas, causing fluidization of the powder and feeding it through the hose 8 to the mixer 6 and then through the exit pipe 3 working area. Through the mixer, additional air can be supplied from the air collector 9 using Veltil 11. Polymer gaseous dispersion at high pressure gets to the rotor electrodes, where during repeated and sequential creation and breaking of contacts of particles from the surface of metal electrodes, particles are generated charges At the same time, to obtain high charges on polymer particles, their gas dispersion velocity at the entrance to the inter-electrode space should be m / s. the deposition of polymer from a gas-dispersed duct consisting of charged particles should not exceed 1–5 m / s in order to not cause powder to be carried off the surface to be coated, i.e. gas dispersion velocity at the exit from the interelectrode space should be. J2 m / s The speed quenching in this device is achieved by applying a system of ro-SO 13 electrodes rotating in opposite directions. Thus, the use of this design of the charge assembly provides improved charge conditions and the achievement of maximum particle charge (the number of contacts increases, with small dimensions, a sufficient contact path is maintained, the particles hit the contact surface), and also provides optimal deposition conditions (quenching output speeds). The guide nozzle 5 serves to direct the gas dispersion flow, and also partially fulfills the function:: quenching rate of charged polymer particles, Powder particles that carry a charge under the action of electrostatic forces and air flow fall on the surface, where they are evenly deposited . This device can also operate from an external voltage source, for which high potential is applied to the rotor electrode system. This also implements a contact mechanism for the charging of polymer particles. With this device, it is possible to apply coatings with high productivity both on cold ones with subsequent melting and on preheated products. You can cover products of complex design and product assembly. Automation of the process is possible. Claims 1. A device for applying polymer coatings, comprising a housing that is made with a gas dispersion supply channel of the applied material 11a, and a charging unit, which in order to increase the charge of the particles of the applied material, the charging unit is made in the form of coaxially mounted with the possibility of rotation in opposite directions of the rotor electrodes, forming a gap between them, communicating with the gas dispersion channel of the applied material, 2. The device according to claim 1, characterized by the fact that the rotor electrodes are designed as impellers 3. The device according to claim 1, characterized in that the inner rotor electrode is made in the form of an auger, and the outer one - in the form of a drum connected to the drive with blades on the inner surface. 4. The device according to claim 1, characterized in that the inner rotor electrode is made in the form of an end muffled pipe with tangentially located outlet openings, and the outer one is in the form of a drum with blades on the inner surface. J - 3 If / J Gas dispersion of polymer Ftsg.Z Sources InforMTiK, accepted in li: mania npi-r extermination: 1. Copyright certificate № 279031, cl. В 29 С 13 / ОО, 1969. Г12. 1 FIG. 2 Gas diffusion nalymer FIG. 6