How are glass bottles made

The glass bottle production process mainly includes:

① Raw material pre processing. 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 ensure the glass quality.

② Batch preparation.

③ Melting. The glass batch is heated at high temperature (1550~1600 ℃) in the tank furnace or tank furnace to form liquid glass that is uniform, bubble free and meets the molding requirements.

④ Forming. Put the liquid glass into the mold to make glass products of the required shape, such as flat plates, various utensils, etc.

⑤ Heat treatment. Through annealing, quenching and other processes, the stress, phase separation or crystallization inside the glass can be eliminated or generated, and the structural state of the glass can be changed.