Vacuum Flask Cup vacuum acquisition method and material solder

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1.”Tail vacuum” (tubular vacuum) is a traditional process technology, which adopts “press sealing technology”. The disadvantage is that this technical measure cannot completely guarantee the airtightness on the microscopic level.

2.”Tailless vacuum” is one of the most advanced process technologies at home and abroad, that is, the process of vacuuming, sealing, welding and cooling of the vessel is controlled by computer under the vacuum environment. It adopts “melting and sealing technology” , can ensure long-term no gas leakage.

3.Cup body material and solder for high temperature vacuum brazing

SS304 (0Cr19Ni9) is welded with H0Cr21Ni10 and solution treated after welding;

SS304Cu (13Cr-7.7Ni-2Cu) is welded by H0Cr21Ni10 and solution treated after welding;

SS316 (0Cr17Ni12Mo2) is welded by H0Cr19Ni12Mo2, and solution treated at 1050~1100 after welding;

AISI321 (1Cr18Ni9Ti) is welded with H0Cr21Ni10 and solution treated after welding；

4.At present, many domestic manufacturers use glass solder to seal the tail, and the vacuum welding temperature is only about 500 degrees. The cost of vacuum equipment is also greatly reduced, the energy consumption is also greatly reduced, and the production cost is lower.