Production Process and Coating Technique for Glass Bottle

The production process of glass bottle mainly includes:

• Raw material pre-processing. Crush block materials (such as quartz sand, alkali, limestone, feldspar, etc.) to dry the damp materials, remove iron from materials containing iron to ensure glass quality.

• Formulation preparation.

• Melting. The glass formulation is heated at high temperature (1550-1600 degrees) in a pool kiln or pool furnace to form uniform, bubble-free, and liquid glass that meets the forming requirements.

• Forming. Pour the liquid glass into a mold to make glass products of the required shape, such as flat plates, various vessels, etc.

• Heat treatment. By annealing, quenching, etc., the internal stress, phase separation or crystallization of the glass can be eliminated or generated, and the structural state of the glass can be changed.

The spray coating process of glass bottle

The production line of spray-coated glass container bottles generally consists of a spray room, hanging chain, and oven. Glass container bottles also need to pay special attention to the problem of wastewater discharge. As for the quality of the spray-coated glass container bottles, it is related to the water treatment, surface cleaning of the workpiece, conductivity of the hooks, air volume, amount of powder spraying, and the level of the operator. The following methods are recommended to be tried:

Pre-treatment of glass bottle

The pre-treatment section of spray-coated glass container bottles includes pre-release, main release, surface adjustment, etc. If in the North, the temperature of the main release part should not be too low and needs to be insulated. Otherwise, the treatment effect will not be ideal.

Preheating stage of glass bottle

After pre-treatment, it needs to enter the preheating stage, which generally takes 8-10 minutes. It is best to allow the sprayed workpiece to have a certain residual heat when it reaches the powder spraying room, in order to increase the adhesion of the powder.

Blowing and purifying stage of glass bottle

If the process requirements of the workpiece to be sprayed are relatively high, this stage is essential, otherwise, if a lot of dust is adsorbed on the workpiece, the surface of the processed workpiece will have many particles, which will reduce the quality.

Powder spraying stage of glass bottle

The most critical issue in this stage is the technical proficiency of the powder spraying personnel. To create excellent quality, it is cost-effective to hire skilled technicians.

Drying stage of glass bottle

For this stage, attention should be paid to temperature and baking time. The ideal temperature for powder is generally 180-200 degrees, depending on the material of the workpiece. Also, the drying furnace should not be too far away from the powder spraying room, generally no more than 6 meters is good.

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