The production of aluminum caps first requires the aluminum sheet to be stretched in a cylinder, which is a stretching method with a crimping ring. At present, the crimping method commonly used in the aluminum cover industry is that the rubber ring or spring compression provides the blanking force. Due to the compression characteristics of the rubber ring and the spring, there is a change process in the compression process, that is, the small and the large Therefore, there is a case where the wall thickness of the side of the aluminum cylinder after stretching is uneven. Moreover, the rubber ring and the spring are easily broken after repeated compression, and the blanking force provides unevenness, which affects the product quality. This paper mainly studies the way of pneumatic crimping, providing uniform and reliable blanking force in the whole process of aluminum cylinder stretching to ensure the quality of aluminum cylinder.
Aluminum caps are widely used in the sealing and sealing of liquor, health wine, medicine, wine and condiments because of their good sealing performance, low cost, energy saving and environmental protection, high food safety and low storage requirements for sealing products. Aluminum cover processing first requires a special mold to process the aluminum foil sheet into a cylindrical shape by tensile deformation. Due to the small stretch factor and high dimensional accuracy requirements, it is usually required to stretch with a press. At present, the rubber ring or spring crimping method commonly used by aluminum cover manufacturers. The blanking force provided by the rubber ring and the spring during the compression process has a small change process, which is not conducive to stretching. Moreover, the rubber ring and the spring are easily broken after repeated compression, and the blanking force provides insufficient or unevenness, which affects the product quality. At present, the production of aluminum caps has been developed into assembly line operations, many of which are mass-produced. How to improve production efficiency and ensure product homogeneity has become an important topic for many aluminum cover manufacturers in China to explore and research in recent years.
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