The production process of glass bottles mainly includes:
① Raw material pre-processing. Crush the bulk raw materials (quartz sand, soda ash, limestone, feldspar, etc.) to dry the damp raw materials, and remove the iron-containing raw materials to ensure the quality of the glass.
② Preparation of batch materials.
③ Melting. The glass batch material is heated at a high temperature (1550 ~ 1600 degrees) in the pool kiln or furnace to make it form a uniform, non-bubble, and liquid glass that meets the molding requirements.
④Forming. Put the liquid glass into the mold to make the glass products of the required shape, such as flat plates and various utensils.
⑤ Heat treatment. Through annealing, quenching and other processes, the stress, phase separation or crystallization inside the glass is eliminated or generated, and the structural state of the glass is changed.
二, the difference between tempered glass and heat-resistant glass
1. Different uses
Tempered glass is widely used in construction, decoration, automobile manufacturing industry (doors, windows, curtain walls, interior decoration, etc.), furniture manufacturing industry (furniture matching, etc.), home appliance manufacturing industry (TV sets, ovens, air conditioners, refrigerators and other products).
Heat-resistant glass is mainly used in the daily necessities industry (heat-resistant glass containers, heat-resistant glass tableware, etc.), and the medical industry (mostly used in medical ampoules and experimental beakers).
2. Different temperature effects
Heat-resistant glass is a kind of glass with strong thermal shock resistance (can withstand rapid cooling and rapid temperature changes and small coefficient of thermal expansion), and uses high temperature (high strain temperature and softening temperature), so in ovens and microwave ovens, even when the temperature is sudden It can also be used safely when changed.
Temporary changes in tempered glass in a microwave oven may cause cracking. In the process of making tempered glass, because of the “nickel sulfide” inside, the glass will expand with time and temperature changes, and there is a possibility of self-explosion. Cannot be used at all.
3. Different crushing methods
When the heat-resistant glass is broken, it will be cracked and will not be scattered. The heat-resistant glass has no risk of self-explosion due to nickel sulfide, because the heat-resistant glass slowly cools, and there is no energy for condensation inside the glass, so it is broken Will not fly apart.
When the tempered glass breaks, it will crack and fly away. During the tempering process, the tempered glass forms prestress and condensation energy, so when it is damaged or explodes, its condensed energy will be released, forming fragments scattered, and at the same time Explosion.
Post time: Apr-29-2020