We have seen all kinds of glass bottles, but do you know how glass bottles are made?
In fact, the general production process of glass bottles is relatively simple, but the shape of glass bottles is free and changeable, the hardness is high, heat-resistant, clean, easy to clean, and has the characteristics of repeated use. Therefore, in addition to plastic bottles, some packaging materials are packaged in glass bottles.
The production of glass bottles must first design and manufacture molds (name: the mother of industry). Most of the raw materials for glass bottles are quartz sand as the main raw material, and other auxiliary materials are melted into liquid at high temperature, and then the liquid is injected into the mold, cools down. After several processes such as cutting and tempering, glass bottles are formed. Glass bottles usually have a rigid logo that is also in the form of a mold. Glass bottle molding methods can be divided into three types: hand blowing, mechanical blowing and extrusion molding according to the production method.
The first step is the pre-treatment of raw materials. The glass bottle is a traditional beverage packaging container in my country, and glass is also a kind of packaging material with a long history. As many types of packaging materials enter the market, glass containers continue to occupy an important place in the packaging of beverages, which is inseparable from their packaging characteristics, which cannot be replaced by other packaging materials. Grinding bulk raw materials (quartz sand (property: silicate mineral), soda ash, limestone, feldspar, etc.), drying wet raw materials, and removing iron from iron-containing raw materials to ensure glass quality.
The second stage is the preparation of raw materials. The above raw materials are mixed and dosed in a certain proportion.
The third stage is melting. The glass batch material is heated at high temperature (1550~1600 degrees) in a melting furnace or a melting furnace to form a homogeneous bubble-free liquid glass that meets the molding requirements.
The fourth step is shaping. In this step, liquid glass is put into an appropriate mold (name: mother of industry) to make glass products of the required shape, such as flat plates and various utensils.
⑤Heat treatment. This step is mainly carried out through annealing, tempering and other processes to eliminate or create stress inside the glass, phase separation or crystallization, and change the structural state of the glass.
This is when the old shareholders visited the glass bottle production process of Xuzhou Better Packaging Products Co., Ltd. and learned that the raw materials and processing of glass bottles we usually use are produced through such multiple processes. Did you know? ?