The firing of enamel products can be said to be the most important part of the enamel production process, which directly determines the quality and appearance of the product. For the previous processes such as pretreatment of metal materials, modeling, preparation of enamel frit , and coating, etc. The quality will be directly reflected after firing. If the product has any defects after firing, the defects can be used to find the corresponding problems in a certain process, so as to improve the quality of the product.

The firing stage of enamel products can be simply divided into furnace firing and furnace cooling. Enamel manufacturers must pay attention to the following 3 points in this process:

1. Firing system

If you want to get a high-quality finished product, before firing the enamel products, you need to develop a firing system from the ground coat to the cover coat. The firing temperature of the enamel needs to be based on the melting and softening temperature of the frit itself. Control within a reasonable range,

The firing time is related to the shape, size and structure of the enamel.

2. Heat evenly

The heat transfer in the enamel furnace is generally radiation transfer. The edge of the enamel product is close to the heating element and receives more heat, while the bottom is less heated because of the thickness or the burning frame. If you want to make the enamel product Heat evenly. During the process, you need to keep a certain distance between the edge of the enamel and the heating element, and keep the distance between different enamel products. You can also improve the heat at the bottom of the enamel by reducing the quality of the firing frame and hanging basket.

3. Uniform cooling

The enamel product is in a hot state when it is out of the furnace. Uneven cooling will cause the iron blank and the enamel layer to shrink inconsistently. The product itself will generate internal stress. Once the internal stress exceeds the tensile strength or compressive strength of the enamel layer, it will cause Defects in the enamel layer, such as cracks and de-porcelain. Therefore, enamel manufacturers usually make a long heat exchange zone in the firing furnace to cool the enamel products slowly and evenly. Avoid using a high-speed fan to blow the enamel products just out of the furnace for speed.