Whether the bottom of the thermos cup has a seam mainly depends on two manufacturing processes: stamping welding and spinning integrated molding.
1. Characteristics of stamping and welding process
The cup body and cup bottom are composed of two independent components connected by welding. The bottom of the cup is usually stamped from stainless steel plate, while the body of the cup can be made of stainless steel plate or plastic. Advantages: The manufacturing process is simple, the cost is relatively low, and multiple shapes and materials can be matched. Disadvantages: There is a potential risk of water leakage at the bottom seam of the cup, and the insulation performance may be slightly inferior to that of the integrated molding process
2. Characteristics of Spinning Integrated Forming Process
The cup body and cup bottom are formed by spinning the same stainless steel plate without welding seams. The manufacturing process is complex and the cost is relatively high. Advantages: The bottom of the cup has no seams, better insulation performance, and is more durable. Disadvantage: The manufacturing process limits the shape and material of the cup bottom, and usually only stainless steel material can be used
3. Appearance design factors
In addition to manufacturing processes, differences in the bottom seams of insulated cups may also be related to external design factors. For example, some manufacturers may choose to add decorative seams at the bottom of the cup to enhance the visual effect.
4. Summary
Whether the bottom of the thermos cup has seams mainly depends on the manufacturing process, but external design factors may also play a role. Stamping and welding processes have lower costs, but there is a risk of water leakage; The spinning integrated molding process has better insulation performance, but the cost is higher. Consumers can choose thermos cups based on their own needs and budget.
