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What is the quality of aluminum plate coating?
Nov 22, 2018

Painting is an important process in the manufacture of aluminum sheets. The quality of coatings directly affects the decorative effect of aluminum sheets. There are four main factors that contribute to the quality of aluminum sheet coating:


1. Environment


It is required to clean the interior of the painting room to prevent dust, insects and certain ventilation, and to ensure the surface quality of the aluminum plate is not polluted. At the same time, due to temperature changes, the process conditions are changed in time.


2, raw materials


Coatings and aluminum sheets are the factors that can affect the quality of the coating during the coating process. Due to the color difference between the batches of the coating, the coating fineness is not enough and the coating rate is not high, the coating and solvent are not well matched, the layering, etc. Directly affecting the coating effect and producing defects 'The unevenness of the aluminum coil substrate, the uneven film thickness, and the poor degree of edge deflection also directly affect the product quality and overall use. Therefore, when selecting raw materials, it should be strictly controlled.


3, equipment


The coating line requires the coating equipment to be in good condition. The coating equipment requires smooth operation, no horizontal and vertical shaking, and the coating roller requires fine grinding. All rollers of the coating machine will be laterally beating and must be controlled within the allowable range, otherwise the surface quality of the coating will be seriously affected.


4, the process


The coating process has a close relationship with the quality of the coating. It is required to control the relative line speed ratio of the coating roller, the paint roller, the metering roller and the substrate within a certain range. According to the different system and the film thickness of the coated product, set a certain viscosity range for the coating to ensure smooth coating and promote the improvement of product quality. The curing process of the coating, oven control must be controlled according to requirements, and must not be arbitrarily changed, otherwise it will seriously affect the color difference and performance of the coated products.