The preservation technology and sealing performance of chocolate tin boxes is achieved through a combination of materials, processes, and design. Tin boxes are made from tin-plated steel, which is a strong and durable material that is resistant to corrosion and rust. The tin plating also helps to protect the contents of the box from oxidation, which can cause the chocolate to spoil.
The process of making a tin box begins with the cutting of the steel sheet into the desired shape. The edges of the sheet are then folded and welded together to form the box. The box is then coated with a protective layer of tin plating, which helps to prevent corrosion and rust. The box is then sealed with a lid, which is usually made from a plastic or metal material.
The design of the tin box is also important for its preservation and sealing performance. The box should be designed to be airtight, so that no air can enter the box and spoil the chocolate. The lid should also be designed to fit snugly on the box, so that no air can escape. The lid should also be designed to be easy to open and close, so that the contents of the box can be accessed easily.
The sealing performance of the tin box is also important for its preservation. The box should be designed to be leak-proof, so that no moisture can enter the box and spoil the chocolate. The lid should also be designed to be airtight, so that no air can escape and spoil the chocolate. The lid should also be designed to be easy to open and close, so that the contents of the box can be accessed easily.
The preservation technology and sealing performance of chocolate tin boxes is achieved through a combination of materials, processes, and design. The tin plating helps to protect the contents of the box from oxidation, while the design of the box ensures that it is airtight and leak-proof. The lid should also be designed to fit snugly on the box, so that no air can escape and spoil the chocolate. By using these techniques, the preservation and sealing performance of chocolate tin boxes can be achieved.