| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problems: although there are an impeller pump and a screw pump available as a jet pump to be installed in a jet solder bath, the impeller pump is more likely to generate a pulsation; and the screw pump can not have a jet height made sufficiently high. SOLUTION: The jet solder bath is provided with many partitions on an internal wall of a casing housing the screw pump. The partitions allow annular chambers formed of the partitions to stop fused solder from flowing backward even if the fused solder exiting from the screw pump is about to flow backward between the screw pump and the internal wall of the casing. COPYRIGHT: (C)2009,JPO&INPIT |
