Glass bottles are the traditional beverage containers in China, which began to be produced a long time ago. Because they are not easy to be preserved, ancient glass products seen by later generations are very rare. Development so far, glass bottles in a lot of packaging materials into the market under the circumstances still occupy an important position, which and glass bottles itself with other packaging containers can not be replaced by the characteristics of inseparable.
The main characteristics of glass bottles: non-toxic, tasteless; Transparent, beautiful, good barrier, airtight, rich in raw materials, low price, and can be used for many times. And has the advantages of heat resistance, pressure resistance, cleaning resistance, both high temperature sterilization, but also low temperature storage.
Glass bottles have a long history of use. How are glass bottles made? First of all to design and manufacture mold, glass material with quartz sand as the main raw material, plus other auxiliary materials in high temperature dissolved into liquid, and then injected into the mold, cooling, cutting, tempering, forming glass bottles. Still don’t get it? Regardless, the global glass network xiaobian to give you a detailed description of glass bottle production process.
The main raw materials of glass bottles are: quartz sand, limestone, feldspar, soda, boric acid and so on.
There are two main types of glass bottle melting kiln:
1, crucible kiln, glass material is filled in the crucible, heating outside the crucible.
2, pool kiln, glass material in the pool kiln melting, open fire on the surface of the liquid glass heating.
Forming must take place within a certain temperature range. It is a cooling process in which glass changes first from a viscous liquid to a plastic state and then to a brittle solid.
Glass bottle production process:
1. Ingredients: weigh all kinds of raw materials and mix them evenly in a mixer according to the designed material list.
2. Melting, the raw material is heated at high temperature to form a uniform bubble-free glass liquid.
3. Forming is to transform molten glass into solid products with a fixed shape.
4. Annealing, glass in the forming process has undergone intense temperature changes and shape changes, this change in the glass left a thermal stress, this thermal stress will reduce the strength and thermal stability of glass products.
Note: If cooled directly, it is likely to break spontaneously during cooling or during subsequent storage, transportation and use. In order to eliminate cold explosion, glass products must be annealed after forming. Annealing is the holding or slow cooling of the glass over a period of time within a certain temperature range to eliminate or reduce the thermal stress in the glass to an allowable value.
Post time: Nov-13-2021