Manufacture of Vacuum Flask Cup

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 At present, the vacuum flask cups on the market are mainly manufactured in two ways:

1. ‘Tail vacuum” (tubular vacuum) technology. This process is a traditional process technology and adopts “press sealing technology”. The disadvantage is that this technical measure cannot completely guarantee the airtightness on the microscopic level. In addition, the bottom seal has the risk of collision and damage, so a tail chamber is often set up, which wastes the inner space of the vacuum flask cup.

2. “Tailless vacuum” is one of the most advanced process technologies at home and abroad, that is, the process of pumping, sealing, welding and cooling of the vessel is controlled by computer under the vacuum environment. Technology”, which can ensure that there is no air leakage and no air leakage for a long time. Tailless vacuum is the technology of choice for manufacturers seeking to manufacture high-end, durable vacuum flask cups.

Selection of cup body material and solder for high temperature vacuum brazing:

304 (0Cr19Ni9) is welded with H0Cr21Ni10 and solution treated after welding;

304Cu (13Cr-7.7Ni-2Cu) is welded by H0Cr21Ni10 and solution treated after welding;

316 (0Cr17Ni12Mo2) is welded by H0Cr19Ni12Mo2, and solution treated at 1050~1100 after welding;

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

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. And less gas remains inside under high temperature brazing. Therefore, if the temperature of vacuum brazing is increased and the brazing material is improved, a higher vacuum degree can be obtained while having better sealing performance.

Choice of vacuum equipment:

In the production process of vacuum flask cups, the degree of vacuum is the key to determining its insulation performance. The sealing performance of welding is reflected in the uniformity and controllability of temperature. Therefore, in order to improve the production quality of thermos cups, it is necessary to choose high-quality vacuum brazing equipment. At present, the competition between domestic and foreign manufacturers in vacuum heat treatment equipment is relatively fierce, and a situation of blooming flowers has formed, but at the same time, the quality has begun to be uneven, so the choice of good brands has become a key factor.

SIMUWU is a domestic brand with more than ten years of experience in vacuum furnace manufacturing and sales. Compared with the same type of foreign brands, SIMUWU has the advantages of affordable price and convenient service. Compared with domestic brands, it also has advantages in experience and technology.

In SIMUWU’s product series, RVB series low temperature vacuum brazing furnace and RHVB high temperature vacuum brazing furnace have strong advantages in the manufacture of vacuum flask cups, which are embodied in the high vacuum degree and high temperature uniformity of their vacuum furnaces. And the degree of automation is high. In addition, SIMUWU also has a dedicated team of engineers, who can quickly install on-site, assist in production and after-sales, and can help manufacturers in production.