公开(公告)号：US20210046673A1

公开(公告)日：2021-02-18

申请号：US16976489

申请日：2019-04-01

申请人： KOSMEK LTD.

发明人： HIROSHI AKAMATSU ,  MASAKAZU YOSHIDA ,  SHOTARO MURATA ,  IKKYU ODA

IPC分类号： B29C33/20 ,  B29C45/64 ,  B29C45/76 ,  H01F7/02

摘要： Provided is a magnetic clamp device that is capable of more finely measuring an induced voltage generated in a coil and selecting countermeasures against reductions in magnetization force. Multiple magnet blocks 11, 21 each comprising an invertible magnet 18, the polarity of which can be inverted, and non-invertible magnet 15, are positioned on a surface of a plate PL composed of magnetic body magnetically clamping a mold M1, M2 when in a magnetized state. The magnetic flux traversing the invertible magnet 18; and a control device 33 that determines whether or not there has been a polarity inversion in the induced voltage detected from the coil 31, and if there has been a polarity inversion, warns that the adhesion of the molds M1, M2 has decreased.