Why Are There Weld Lines in The Inner Liner Of The Thermos? The Editor Will Solve Your Confusion!

Why are there weld lines in the inner liner of the thermos? The editor will solve your confusion!

The thermos cup can store hot water for a long time, so that the temperature does not drop so fast. This is actually felt by the inner liner of the thermos cup, so you need to be more careful in selection. There are two weld lines on the gallbladder. Faced with this phenomenon, everyone is puzzled. Let me tell you the specific reasons.

In fact, whether there are welding seams on the inner wall of the vacuum flask depends on the production process used in the processing of the vacuum flask. The stitching, indicating the seam welding technology it uses, if there is no line, it is the seamless welding overall stretching technology. The overall stretching process is a process of directly stretching a stainless steel seamless tube material into a thermos cup liner through a combined die. The process is simple, but the requirements for equipment and molds are high. If the overall stretching process is used to stretch the inner liner of the thermos, it will cost more materials and the cost will be higher. Sometimes if the height of the inner liner is too high, it cannot be stretched at one time, and it needs to be stretched twice or even three times to complete it. The advantage is that there is no welding and no welding seam can be seen, and it will look more beautiful and smooth.

The welding and stretching process is to use stainless steel sheets through cutting, bending, rounding and other processes, and then use a special straight seam welding machine to perform argon arc welding. You will see the first straight weld, and the other one is in the The argon arc welding between the inner tank and the bottom of the vacuum flask needs to be done with a special horizontal circular seam welding machine. This is the second circular weld. After the process is completed, it is done with a leak detector for the inner tank of the vacuum flask. One is to detect whether there is leakage of welding, and then proceed to the next process of pressing and welding with the outer tank. For the second welding seam, most of the thermos cup manufacturers produced in Zhejiang are welded by the horizontal circular seam welding process, so two welding seams can be seen, and the bottom of the inner tank has an arc shape, which is easier to see clearly To the dirt, can be directly cleaned. The manufacturers of thermos cups in Guangdong are welded by vertical girth welding process. The bottom of the inner tank is a right angle, so only a straight welding seam can be seen with the naked eye. Therefore, the bottom welding seam stretching process can save materials and costs, and the design can be various. These two stretching processes do not have much difference in the use and thermal insulation performance of the thermos. The only difference is that there is a big difference in the purchase price. The integrally stretched thermos will be more expensive than the welded and stretched thermos. Some, but this does not affect the use and insulation performance.