Abstract: The chamber C1 of Low-E glass coating line is a very important vacuum chamber for the whole production line. Its cycle time determines the fastest cycle time that the whole glass coating line can achieve. This paper puts forward a series of requirements for the design of the chamber C1, and gives the corresponding design principles. Starting from the direction of reducing equipment manufacturing cost, reducing energy consumption and increasing the applicability of equipment, it also gives the direction different from the conventional design. In the special design, the pumping time and pump group parameters are calculated. The C1 chamber was designed and manufactured according to this design. We tested a series of parameters and the special design of the occupying block changed the pumping time by 43.2%, which has been proved.

Key words: Low-E glass, coating line, vacuum chamber, vacuum pump, pumping calculation, C1 chamber design