The glass batch material is heated at a temperature of 1550 to 1600 degrees in a pool kiln or furnace to heat it to form a liquid glass that is uniform, free of bubbles, and meets the molding requirements. Put the liquid glass into the mold to make the glass products of the required shape, such as flat plate, various utensils and other heat treatment.
The raw material of the glass bottle is quartz sand as the main raw material, and other auxiliary materials are melted into a liquid at high temperature, and then the essential oil bottle is injected into the mold, cooled, cut, and tempered to form the glass bottle. Glass bottles generally have sex marks , and the signs are also made of mold shapes. According to the manufacturing method, the forming of glass bottles can be divided into three types: manual blowing, mechanical blowing and extrusion molding.
Glass bottle heat treatment technology:
The glass bottle undergoes drastic temperature changes and shape changes during the molding process, and this change leaves thermal stress in the glass. This thermal stress will reduce the strength and thermal stability of the glass product. If directly cooled, it is likely to rupture on its own during cooling or later during storage, transportation, and use.
In order to eliminate the cold explosion phenomenon, glass products must be annealed after forming. Annealing is to keep the temperature within a certain temperature range or slowly lower the temperature for a period of time to eliminate or reduce the thermal stress in the glass to the allowable value.
In addition, some glass products can be rigidized in order to increase their strength. Including physical stiffening (quenching), used for thick glass, desktop glass, car windshield, etc .; and chemical stiffening (ion exchange), used for watch cover glass, aviation glass, etc. The principle of stiffening is to generate compressive stress on the glass surface layer to increase its strength.