The manufacturing process of high-temperature resistant glass mainly includes the steps of raw material mixing, dissolution, molding, fire polishing, slow cooling, defect inspection and packaging delivery. The following is a detailed introduction:

Raw material mixing: silica sand, boric acid, etc. are used as main materials, and are mixed according to a fixed ratio. The addition of borax is the key difference between heat-resistant glass and ordinary glass, usually accounting for about 13%, which can significantly improve the heat resistance of glass.

Dissolution: in a melting furnace above 1500℃, the raw materials are fully melted into liquid glass. In this process, the temperature should be strictly controlled to ensure that the raw materials are completely dissolved and no impurities remain.

Molding: liquid glass is poured into the mold of the molding machine and pressed or blown into the required shape at a suitable molding temperature. Temperature and pressure should be accurately controlled in the molding process to ensure the dimensional accuracy and surface quality of glass products.

Fire polishing: the molded glass products are subjected to fire polishing treatment, and the parts contacting the mold are heated by an oxygen furnace to make the surface smoother, which is convenient for subsequent grinding and polishing.

Slow cooling: put the glass products polished by fire into a slow cooling furnace, keep the high temperature for a period of time and then slowly cool. The purpose of this step is to remove the stress generated in the molding process and prevent the glass products from cracking due to stress concentration in subsequent use.

Defect inspection: strictly inspect the glass products after slow cooling to confirm whether they meet the specifications. The inspection contents include dimensional accuracy, surface quality and heat resistance.

Packaging and delivery: packaging and delivering the glass products that have passed the inspection according to the requirements of consumers. Shockproof and moisture-proof measures should be taken during packaging to ensure that glass products are not damaged during transportation.