What are the pretreatment process flows of the cookware coating line?

As an indispensable item in daily life, the quality and appearance of cookware are of great importance. The pretreatment process flow of the cookware coating line is the key link to ensure the quality and appearance of cookware. This article will introduce the various steps of the pretreatment process flow of the cookware coating line in detail to help you have a deeper understanding of the cookware manufacturing process.

The pretreatment process flow of the cookware coating line mainly includes loading, hot water washing, pre-degreasing, main degreasing, water washing, water blowing, drying, cooling, sanding, water washing and sand removal, alkali corrosion, neutralization, pure water washing, re-drying and cooling. These steps together constitute the core of the pretreatment of cookware coating, aiming to ensure that the surface of the cookware is clean, oil-free and rust-free, laying a solid foundation for the subsequent coating process.

First of all, loading is the starting step of the pretreatment of the cookware coating line. In this step, the worker places the cookware to be processed on the assembly line to prepare for subsequent processing. Next, the cookware will enter the hot water washing link. The purpose of hot water washing is to use high-temperature hot water to remove some grease and impurities on the surface of the cookware, which facilitates subsequent processing.

Next comes the pre-degreasing and main degreasing stages. Both steps use degreasing agents to remove grease from the surface of the cookware. Pre-degreasing mainly removes floating oil on the surface, while main degreasing removes grease more deeply. The selection and amount of degreasing agent should be determined according to the material and degree of oil pollution of the cookware to ensure the best degreasing effect.

After degreasing, the cookware will enter the water washing stage. The purpose of water washing is to remove the degreasing agent and impurities remaining during the degreasing process. Water washing usually needs to be performed multiple times to ensure that the surface of the cookware is clean and free of residue. The water blowing stage uses high-pressure gas to blow off the water droplets on the surface of the cookware to avoid adverse effects of water droplets in subsequent processing.

Next comes the drying and cooling stages. Drying is to dry the moisture on the surface of the cookware to avoid the influence of moisture on subsequent processing. The drying temperature and time need to be determined according to the material and size of the cookware. Cooling is to cool the dried cookware to room temperature for subsequent processing.

Sandblasting is an important step in the pre-treatment of cookware. The purpose of sandblasting is to remove the oxide layer, rust and old coating on the surface of the cookware, improve the roughness of the surface of the cookware, and increase the bonding strength between the coating and the cookware. After sandblasting, the cookware will be washed again to remove the sand and impurities generated during the sandblasting process.

The alkaline corrosion process is to corrode the surface of the cookware with an alkaline solution to remove stubborn stains and rust on the surface. After corrosion, the cookware will be neutralized to neutralize the residual alkaline solution. Subsequently, the cookware will be washed with pure water to remove impurities generated during the neutralization process.

Finally, the cookware will be dried and cooled again to ensure that its surface is clean and free of moisture, ready for the subsequent coating process. At this point, all the steps of the pre-treatment process of the cookware coating line are completed.

In general, the pre-treatment process of the cookware coating line is a complex and delicate process. Each step has its specific purpose and function, which together ensures that the cookware achieves the best treatment effect before coating. Only in this way can we ensure that the cookware has good quality and appearance after painting and meet the needs of consumers.

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