1: Color steel plate product wave edge or middle pine drum belly phenomenon: mainly the quality problems of the substrate. The predecessor of the substrate is rolled hard, due to uneven thickness caused by the wave edge phenomenon is more, other due to equipment problems are less part, this is the actual reason, if the substrate does not wave side paint the wave edge then the general situation is: deviation correction or other equipment there is abnormal operation caused.
2: Line: color steel plate products come out to the back paint or back paint there is a phenomenon of paint leakage, called in the industry: line. Such a problem is generally a problem that is difficult for each manufacturer to avoid, there are impurities in the paint that occupy a part, the reason for the equipment is also part, and the factor of the substrate also has a proportion.
3: color steel plate product folds: the equipment without problems is generally the original existence of the substrate occupies a large proportion, the folds of the hot-dip galvanized steel plate mainly from the process of the galvanizing production line and the failure of the equipment caused, generally understand the galvanizing process of friends it is not difficult to solve this problem.
4: Judging the quality from the appearance of the steel coil: generally looking at the appearance requires the winding to be neat, there are no burrs, jagged edges, and obvious gap between the two sides of the steel coil, which is the minimum requirement, but it is very difficult to judge the diverse problems encountered in production by these alone.
5: Holes, leakage: because of defects in the quality of the substrate, if the substrate has serious edge damage and gaps, and there are holes in the substrate, then the painting staff will open the painting equipment according to the industry's standard operation requirements to let it skip, which inevitably has the existence of leakage.
6: Pressure tile tile mark paint peeling: the production unit should do the pressure size of the test and whether the equipment operation system is normal and good, whether the bearing is working well, and then whether the compression action of the compression machine is consistent with the steel rollers of each group, there will be actual interference problems. New press equipment due to the sharpness of the pressing wheel can easily lead to dry film scratches of color steel plate paint, customers are advised to pay attention to such problems.
7: paint quality: paint quality is the key to the quality of the product, paint weather resistance, flexibility, hardness of the paint film are proportional to the inspection results of the product that indicates that the quality of the paint is qualified, such as: impact, wipe resistance, T bend can reflect the actual quality of the paint, in the process of operation has a substandard must immediately find the reason for the existence of substantial work adjustment.
8: color difference: the quality of paint is related to a part, the production process also has practical problems, the type of substrate also occupies a certain proportion, galvanized steel plate, aluminum-plated zinc steel plate, the same process and raw material production of color steel plate will appear different color differences, which has a great relationship with the type of substrate. Therefore, it is recommended that users pay attention to such problems in production.
9: Zinc grain: color steel plate substrate due to the original problem caused by quality defects, generally such a substrate is not suitable for machine production, quality inspectors have the right to deal with it to decide whether to produce.
10: Foaming: The color steel plate substrate and the core material have a chemical reaction.
Purification engineering company, cosmetics GMP decoration: http://www.gdgmp.com/jhgc/hzp/0117/549.html