The manufacturing process of glass bottles mainly includes the following steps:
Raw material preparation: The main raw materials of glass bottles include quartz sand, soda ash (sodium carbonate), limestone, etc. These raw materials need to be strictly screened and inspected to ensure that their quality meets production requirements. The raw materials are mixed in a certain proportion and dried to ensure the stability of the raw material quality.
Melting: The mixed raw materials are sent to the furnace for high-temperature melting, usually at a temperature above 1500°C. The furnace operates 24 hours a day, and the raw material mixture is melted into liquid glass in the furnace. During the melting process, continuous stirring and heating are required to ensure the uniformity and quality of the glass liquid.
Molding: The molten glass liquid is molded by molding equipment. Common molding methods include blowing and pressing:
Blowing method: Put the glass liquid into the mold, blow air into the glass liquid through the blowing pipe to form a hollow bottle body. This method is suitable for the production of glass bottles of various shapes, such as wine bottles, beverage bottles, etc.
Pressing method: Pour the glass liquid into the mold and apply pressure through the press to form it. This method is suitable for producing glass bottles with simple shapes and large batches, such as medicine bottles, pickle bottles, etc.
Annealing: The formed glass bottles need to be annealed to eliminate internal stress and improve their strength and stability. The annealing process is to put the glass bottles into the annealing furnace, heat and cool them according to a certain temperature curve, so that the structure of the glass gradually tends to be stable.
Inspection and packaging: The annealed glass bottles need to be inspected for quality, including appearance inspection, dimensional measurement, mechanical property testing, etc. Qualified glass bottles are packaged and stored and prepared for delivery.
Equipment and technical requirements:
Furnace: Used to melt raw materials at high temperature, usually at a temperature above 1500°C.
Molding equipment: Including blowing machines and die-casting machines, used to form molten glass into the desired shape.
Annealing furnace: Used to eliminate stress inside the glass to ensure its safety and stability. Quality control and testing methods:
Appearance inspection: Check whether the surface of the glass bottle has defects, cracks, etc.
Dimension measurement: Ensure that the size of the glass bottle meets the design requirements.
Mechanical properties testing: Test the mechanical properties of the glass bottle such as compression and ten