How many processes does the production of a stainless steel vacuum flask go through? （4）

The treated stainless steel water cup shell and inner tank will undergo the first complete ultrasonic cleaning to wash away the debris accumulation caused by the previous various processes, which is convenient for the good operation of the subsequent supply and demand.

Next, the bottom welding process of the stainless steel inner tank will be carried out, which is the welding of the first bottom of the multi-layer bottom of the stainless steel water cup. Then, the inner bladder after welding the bottom and the outer shell with the bottom of the cup body not yet welded are welded at the mouth. This welding should be as close as possible to be as smooth as possible to facilitate the later polishing and avoid serious weld bead.

After the work of welding the cup mouth is completed, a second thorough ultrasonic cleaning is required to remove dirt and debris. After cleaning, the cup body must be welded on the bottom of the second layer, that is, the bottom of the shell cup. According to the structural design requirements of the water cup, some stainless steel water cups have only two-layer bottoms. This time we will describe the example of a three-layer stainless steel water cup with a three-layer bottom in the process.

In addition to the main function of the second cup bottom is to satisfy the completeness of the structure, another important function is to complete the need of vacuuming. After the second cup bottom is welded, some companies will do ultrasonic cleaning again.

Personally think it is not necessary, just need to do high-pressure dust removal, which is efficient and convenient, and can also reduce production costs. The next step is to vacuumize the processed cup. At present, most water cup factories use high-temperature and high-pressure vacuum furnaces.

The thermos cup produced by Dongguan Zhanyi Commodity Technology Co., Ltd. uses sufficient materials and exquisite workmanship. In terms of material, we insist on using food-grade 304 stainless steel inside and outside, or a combination of 304 stainless steel outside and 316 stainless steel. The heat preservation time can reach 8 hours, and the cold preservation time can reach 12 hours. We insist on using the AQL1.0 inspection standard, which is far higher than the peer standards, and all links adopt a full inspection system to ensure that each product is a high-quality product. Customers from all over the world are welcome to visit our factory for inspection, and welcome to place orders for cooperation.