Y broses cotio a ddefnyddir fwyaf yn Tsieina yw'r broses cotio paent. Gall y broses gorchuddio sicrhau ansawdd ymddangosiad bwcedi paent Changzhou a gwella gallu gwrth-cyrydu bwcedi paent. Gellir rhannu'r broses gorchuddio yn chwistrellu aer, chwistrellu electrostatig a chwistrellu di-aer pwysedd uchel yn ôl y dull chwistrellu.
Before painting, we must first carry out processes such as degreasing, rust removal, phosphating, cleaning and drying on the paint bucket to ensure the quality of the painting and improve the adhesion of the paint film. For paint bucket products with low appearance requirements, the method of manually wiping the bucket can also be used, which can effectively reduce the cost. The final process of painting is the printing of the logo. In the early years, the logo of Changzhou paint bucket was air spraying, and the hollowed logo plate was used to spray characters. With the progress of users' requirements for the surface quality of Changzhou paint buckets, now logo printing has been gradually replaced by better screen printing and thermal transfer technology.
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