how glass is made

How Are Glass Bottles Produced?

Glass bottle is the main packaging container in food, medicine and chemical industry. They have good chemical stability; Easy to seal, good air tightness, transparent, and the condition of the contents can be observed from the outside; Good storage performance; The surface is bright and clean, which is convenient for disinfection and sterilization; Beautiful appearance and colorful decoration; It has certain mechanical strength and can withstand the pressure in the bottle and the external force during transportation; It has the advantages of wide distribution of raw materials and low price. So, how glass is made?

how glass is made

Glass bottle production process mainly includes:
Raw material pre-processing Crush the massive raw materials (quartz sand, soda ash, limestone, feldspar, etc.), dry the wet raw materials, and remove the iron from the iron containing raw materials to ensure the quality of glass
Batch preparation
Melting The glass batch is heated at high temperature (1550 ~ 1600 degrees) in the tank furnace or tank furnace to form uniform, bubble free liquid glass that meets the molding requirements
Molding Put the liquid glass into the mold to make the glass products with the required shape, such as flat plates, various utensils, etc
Heat treatment Through annealing, quenching and other processes, the stress, phase separation or crystallization in the glass can be cleaned or generated, and the structural state of the glass can be changed.

First, the mold should be designed, determined and manufactured. The glass raw material takes quartz sand as the main raw material, plus other auxiliary materials to melt into liquid at high temperature, and then injected into the mold, cooled, cut and tempered to form a glass bottle. Glazed bottles generally have rigid marks, which are also made of mold shape. According to the manufacturing methods, the molding of glass bottles can be divided into manual blowing, mechanical blowing and extrusion molding.

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