In addition to cold processing in glass bottle deep processing, glass bottle factories more commonly use thermal processing, that is, a manufacturing method between the melting point (1450 degrees) and the Xu cold point (450 degrees).
Compression molding method injects molten hot glass paste into the engraved pattern and molds it into a block, while the pattern is also pressed. Sand mold casting presses the model into moderately deep sand and blasting with acetylene to prevent the sand mold from collapsing. Put the glass paste into the sand mold and wait for the glass to cool before taking it out and then grinding. Embryo core forming is one of the earliest techniques used to make glass windows. First, mix soil and horse dung to make an embryo pericardium. Then dip the hot glass paste on the metal rod to form the main body of the container. In the outer picture, the pattern is drawn around the glass wire, and the digging is completed after the cooling is finished. The embryonic heart is complete.
The torch thermoplastic is heated by a small spray gun or a torch. It is also called the torch thermoplastic. It only uses various colors of boron glass or soda glass color rods, and is continuously combined into a shape with techniques such as stretching, twisting, and winding. Small and delicate performances, such as glass beads, animals and plants. Because of the different glass rods used, they are divided into solid, hollow and brushed thermoplastic. In addition, they can also be used with colored paintings to increase the interest of the work.
After the wax mold is wrapped with refractory gypsum in the dewaxing casting method, the glass raw material and the empty mold are put into the furnace to heat at the same time, and the glass slowly flows into the mold under high temperature to form, and then it is placed in the furnace for dewaxing, and the plaster is slowly removed. The mold is finished by grinding and planing. The powder casting method fills the glass block and glass powder into a pre-designed model, and puts it in a furnace to heat up and melt into a whole glass work.