Enameling is one of the important links in enamel production. With the development and improvement of production technology, various special enameling methods have been invented, including the two-enameling and one-firing process. Compared with the past two-enameling and two-firing, it is less A firing process can greatly improve production efficiency.

There are many combinations of two enamels and one firing process: dry ground coat-dry cover coat, wet ground coat-dry cover coat, wet ground coat-wet cover coat. This article can help enamel manufacturers understand the advantages and disadvantages of various two-enameling and one-firing, and it is recommended to collect them.

(1) Ground coat dry powder – cover coat dry powder

Advantages: 1. Suitable for mass production of flat plates; 2. Clean; 3. Highly automated; 4. No grinding required; 5. No drying required; 6. The porcelain surface of enamel products is smooth.

Disadvantages: 1. It is not suitable for the production of products with complex structure; 2. The selection of cover coat colors is limited; 3. An air conditioning system is required; 4. A large amount of enamel powder needs to be continuously recovered;

(2) Ground coat slurry – cover coat dry powder

Advantages: 1. Suitable for mass production of flat products; 2. Clean; 3. Highly automated.

Disadvantages: 1. It is not suitable for the production of products with complex structure; 2. The selection of cover coat colors is limited; 3. An air conditioning system is required; 4. A large amount of enamel powder needs to be continuously recovered;

(3) Ground coat slurry - cover coat slurry

Advantages: 1. The cover coat is rich in color; 2. The variety of enamel slurry can be quickly replaced; 3. Only one drying is required; 4. No air conditioning system is required; 5. The investment cost is low.

Disadvantages: 1. The repair rate is 5%~10% higher than the first two methods; 2. Wastewater recycling is required; 3. Small batch production.

In actual production, electrostatic spray enameling is the most used process for two-enameling and one-firing. At present, the two-enameling and one-firing dry method is relatively mature in the production of domestic architectural decorative enamel panels. in production.