Introduction to the Spraying Process of Glass Bottles
1. Concept Overview
The so-called spraying process: In order to enhance the artistic appeal of glass bottles, colors are sprayed on the glass bottles according to relevant requirements. With the progress of technology, the spraying process is increasingly applied by Baijiu manufacturers. At the same time, the painting techniques are also diversified. The colors can be monochrome, multi-color, gradient colors, and the positions can be sprayed completely or partially.
2. Process flow
Firstly, give a brief overview of the production process of glass bottles, which mainly includes: ① Pre processing of raw materials. Crush the bulk raw materials (quartz sand, soda ash, limestone, feldspar, etc.) to dry the wet raw materials, and remove iron from the iron containing raw materials to protect the quality of the glass Batch preparation. ③ Melting. The glass batch is heated at high temperatures (1550-1600 degrees Celsius) in a tank or furnace to form a uniform, bubble free liquid glass that meets the molding requirements Forming. Put liquid glass into the mold to make the required shape of glass products, such as flat plates, various utensils, etc. ⑤ Heat treatment. By annealing, quenching, and other processes, stress, phase separation, or crystallization within the glass can be eliminated or generated, as well as the structural state of the glass can be changed.
The spraying production line for glass bottles generally consists of a spraying room, a hanging chain, and an oven. Glass bottles also require pre-treatment of water, and a particular concern for glass bottles is the issue of sewage discharge. As for the quality of glass bottle spraying, it is related to water treatment, surface cleaning of the workpiece, conductivity of the hook, the size of the air volume, the amount of powder sprayed, and the level of the operator.
(1) Pre processing section
The pre-treatment section before glass bottle spraying includes pre stripping, main stripping, surface adjustment, etc. If it is in the north, the temperature of the main stripping part should not be too low and insulation is needed, otherwise the treatment effect will not be ideal;
(2) Preheating section
After pre-treatment, it needs to enter the preheating section, which usually takes 8-10 minutes. When the glass bottle reaches the powder spraying room, it needs to have a certain amount of residual heat on the sprayed workpiece to increase the adhesion of the powder;
(3) Glass bottle blowing and purification section
If the process requirements of the sprayed workpiece are relatively high, this section mainly focuses on the product. Otherwise, if there is a lot of dust adsorbed on the workpiece, there will be many particles on the surface of the processed workpiece, which will reduce the quality;
(4) Powder spraying section
The most crucial aspect of this paragraph is the technical problem of the powder sprayer, in order to create excellent quality.
(5) Drying section
What should be noted in this paragraph is the temperature and baking time. The powder is generally best at 180-200 degrees, depending on the material of the workpiece. Also, the drying oven should not be too far from the powder spraying room, usually 6 meters is better.