Patent ID: 11920236
Assignee: BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B  H | IPC B  C  H

Claim 6:
7. The method according to claim 6, further comprising:
preheating the magnet at a preheating temperature of 100˜200° C. before feeding the magnet into the coating chamber; and
after the magnet is cooled in the cooling chamber:
opening a fourth valve that connects the cooling chamber to a sample discharging chamber, delivering the magnet into the sample discharging chamber, closing the fourth valve, and filling the sample discharging chamber with inert gas for further cooling; and
opening a sample discharging chamber valve of the sample discharging chamber and delivering the magnet out of the sample discharging chamber;

wherein:
the coating machine further includes:
a first molecular pump connected to the first buffer chamber and located at one end of a top of the first buffer chamber that is close to the coating chamber;
two second molecular pumps connected to the cleaning chamber and installed at two ends, respectively, of a top of the cleaning chamber; and
a third molecular pump connected to the second buffer chamber and located at one end of a top of the second buffer chamber that is close to the third valve; and

the first molecular pump, the two second molecular pumps, and the third molecular pump are configured to be in working condition when the magnet is being delivered to the cleaning chamber, cleaned in the cleaning chamber, fed into the coating chamber, and coated in the coating chamber.