Household appliances dust-free coating line manufacturers bring you painting tips

1. Overview

The aim of mastering correct spraying operation skills is to save coatings, obtain coatings that meet the quality requirements, avoid the consumption of quality and physical strength of coatings, and reduce the probability of waste products. Through the correct training of paint operation skills and changing the skills into habits, not only the production efficiency can be improved, but also the quality of the film can be improved. Next we will introduce the basic techniques used in the use of airless or general air atomization equipment.

2. Preparing before painting:

The spray gun and related equipment should be cleaned and in normal working condition. Check whether the spray gun has an ideal spray shape. The ideal spray should be symmetrical, uniform atomization and clear edges. Only a small amount of paint mist particles exist outside the spray edge. The capacity of the air compressor should be in line with the requirements of the equipment manual. For example, GPQ6C airless spraying machine stipulates air consumption of 300-2500L/min, and should be equipped with 1.6-2.5 cubic meters or 2.5 cubic meters of air compressor. In order to ensure adequate air intake, the diameter of the air compressor outlet pipe and the gas pipe connecting to the spraying machine inlet should not be less than the diameter of the air intake pipe specified in the specification.

Coating Line for Driving Shaft

3. Spraying Pressure

To achieve the right atomization pressure condition: the minimum atomization pressure required for ideal atomization of liquids is achieved. Therefore, the principle that should be followed when adjusting the pressure is: "the spray shape is good, the pressure is set" (the pressure should be as low as possible) the excessive pressure will not improve the coating quality, it will only shorten the life of the equipment and increase the wear of the nozzle. Make the paint rebound, waste the paint and pollute the space.

4. Spraying Skills

Overview

Before pulling the gun, the gun should b e in a moving state; B. Keep the distance between the gun and the workpiece constant, and the painting line of the car should not be far or near; C. The gun should move at a uniform speed when spraying; D. When spraying the same work, the starting point of the first spraying stroke should be the same; E. The workpiece surface should be covered by wet paint; F. The overlap amount of adjacent spraying stroke is consistent; g. For the same workpiece, the number of spraying stroke should be consistent;

(2) Spray gun distance a. Spray gun and workpiece distance is about: ordinary air atomization, 15cm-20cm; non-air spray atomization, 30-38cm B. To obtain wet, dark, called thicker coating, spray gun can be closer; C. To obtain drier, lighter, thinner coating, spray gun can be far away;

(3) Spraying travel

A. The trajectory of the spray gun is parallel to the surface of the workpiece; B. The spray gun body is perpendicular to the surface of the workpiece, otherwise the paint will be wasted; C. Don't let the spray gun arc motion, the conductor automatic vulcanization line is the forearm and shoulder of the mobile operator, and can not only move with the wrist; D. The adjacent spraying line should have a overlap quantity; For ordinary airless spraying, the lapping amount is 50%; for airless spraying, the lapping amount is 25%; E. When the uniformity of coating thickness is high, the cross spraying method should be adopted, and the straight direction spraying should be done first. F. When spraying out of the air, attention should be paid to the direction of the wind. Unsprayed surfaces should be below the wind in order to bring flying paint and rebound to the untreated surfaces.