The production process of glass jar mainly includes raw material pre-processing. The lime raw materials (quartz sand, soda ash, limestone, feldspar, etc.) crushed, so that the wet raw materials dry, iron-containing raw materials for iron treatment to ensure the quality of glass. Preparation of mating materials. Glass batch material in the pool kiln or pool furnace for high temperature 1550 ~ 1600 degrees, heating, so that the formation of uniform, no bubbles, and meet the molding requirements of liquid glass molding. The liquid glass into the mold made of the required shape of the glass products, such as flat, various utensils and other heat treatment. Through the annealing, quenching and other processes to eliminate or produce the internal stress of the glass, split or crystallization, and change the structure of the glass state.
Why the life of glass jar burst phenomenon
In fact, because of the reasons for the thermal expansion and contraction, the glass jar heat will be part of the thermal expansion, while the cold part of the remain intact, and the glass jar texture is relatively brittle, so the glass jar is not uniform heating, which will lead to The glass jar can not bear the expansion of the heated part of the split, or blasted.
How can we prevent this from happening?
You should know that the test tube in the heating before the first to warm it? In fact, the glass tube at the bottom of the various parts of the first to maintain a certain temperature, and then align the lower part of the heating, so there will be no danger. It will be the same as the glass jar, heated part of the expansion, the other part is still cold, then there will be the risk of exploding.
Glass jars in boiling water for 10 minutes the principle is similar, that is, so that the entire glass jar have a certain high temperature, this time to the glass jar inside pouring hot water, for the glass jar, the internal temperature and external temperature Are almost the time, then there will be no danger.