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Color coated aluminum coils’ reasons for defects

Views: 4     Author: Site Editor     Publish Time: 2022-03-28      Origin: Site

Color-coated aluminum coils are prone to problems such as missing coating and needle-like discoloration when they are suitable for coating. The coating of color-coated aluminum coils is one of the most critical processes in the entire aluminum coil coating production line. , especially the apparent quality, which directly affects the decorative effect of the product. Therefore, we must first master the common defects in the coating process and their causes.

Reasons for color-coated aluminum coils' defects

1. Raw materials

The paint and aluminum coil of the color-coated aluminum coil are the factors that most affect the coating quality in the coating process. Due to the color difference between batches of paint, the fineness of the paint is not enough and the coating rate is not high, and the paint and solvent are not well matched. , layering, etc. will directly affect the coating effect and produce defects. The unevenness of the aluminum coil substrate, the uneven film thickness, and the poor edge deflection also directly affect the product quality and overall use. Therefore, when selecting raw materials, it should be strictly controlled.

2. Equipmentbuy Color Coated Aluminum Coil - Decoulife

The color-coated aluminum coil coating line requires the coating equipment to be in good condition, the coating equipment needs to run smoothly, there should be no horizontal and vertical jitter, and the coating roller needs to be finely ground. The lateral runout of all rollers of the coating machine must be controlled within the allowable range, otherwise it will seriously affect the surface quality of the coating.

3. Process

The coating process is closely related to the quality of the coating, and 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. It is necessary to set a certain viscosity range for the coating according to different systems and the film thickness of the coating product to ensure the smooth progress of the coating and promote the improvement of product quality. The curing process of the coating, the oven control must be controlled according to the requirements, and must not be changed arbitrarily, otherwise it will seriously affect the color difference and performance of the coated product.

4. Environment

The interior of the coating room is required to be clean, dust-proof, insect-proof and ventilated to ensure that the quality of the coating surface is not polluted. At the same time, the process conditions are changed in time due to temperature changes.

5. Human factors

The responsibility of the operator, the technical proficiency and the standardization of operation are the keys to obtaining high-quality painting effects. Therefore, it is necessary to strengthen the training of operators and let operators master the principles and key points of coating technology, strengthen responsibility, and operate in strict accordance with operating procedures to ensure high-quality coating products.

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