The sealing principle of the aluminum cover
According to the sealing principle of aluminum cap bottle cap, it can be divided into flat pressure seal and side wall seal. The flat pressure seal can only be used in the screw cap. When it is tightened, the contact surface between the bottle mouth plane and the inner plane of the bottle cap increases, so as to achieve the sealing effect.
The side wall seal is to use the effective contact between the memory of the bottle mouth and the outside of the bottle cap sealing system to achieve the sealing effect. The screw cap with side wall sealing system should be the scheme of ordinary corrugated cap. For injection glass caps are often metal caps
combined with rubber stoppers, which need to be designed and selected according to the structure, use and price of the product.
In the case of specifying the specifications of the aluminum cap, salt water bottles of different calibers should be selected, and a suitable bottle cap should be selected. The shape of the aluminum cap is generally flat, and the shape after pressing depends on the capping mold of the capping machine. If the mother and child and the flat top are sealed into the flat top of the aluminum cap, they will often not be tightly attached to the bottle stopper, and loosening will easily occur.
Application of bottle cap
Bottle caps are an important part of food and beverage packaging, and they are also the first place where consumers come into contact with products. The bottle cap has the function of keeping the content product airtight, and also has the functions of anti-theft opening and safety, so it is widely used in bottled products, so the bottle cap is the upstream industry of the food, beverage, wine, chemical industry, and pharmaceutical industries. It is a key product of bottle container packaging. In the early stage of the development of bottle caps, cork materials, tinplate crown caps and twist-off caps were used. Up to now, aluminum long-necked aluminum caps, carbonated drink aluminum caps, hot-fill aluminum caps, injection aluminum caps, medicine caps, and twist-off caps have been developed. Type ring caps, safety button claw caps and plastic bottle caps and other products.
Since bottle caps are an important part of the beverage packaging industry, strong changes in downstream consumer market demand will directly affect the market demand for bottle caps, and the vigorous development of the beverage industry has higher and higher requirements for product packaging, which will drive Demand for bottle cap products. Moreover, bottle cap products occupy a key position in the beverage packaging industry, so the development trend of the beverage industry will directly affect the demand for bottle cap products. In recent years, the market demand for bottle cap products has been stable and showing a growing trend. However, changes in the packaging materials used will relatively change the product structure of bottle cap products; overall, the use ratio of plastic caps will increase. Although some aluminum caps are replaced by plastic caps, they are mainly used in wine and functional beverages, and the demand grows steadily, while the demand ratio for claw caps fluctuates greatly
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