US 11,869,711 B2
Magnetic clamp device
Ryota Kojima, Kobe (JP)
Assigned to KOSMEK LTD.
Appl. No. 17/257,441
Filed by KOSMEK LTD., Kobe (JP)
PCT Filed May 31, 2019, PCT No. PCT/JP2019/021664
§ 371(c)(1), (2) Date Dec. 31, 2020,
PCT Pub. No. WO2020/012819, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 2018-132370 (JP), filed on Jul. 12, 2018.
Prior Publication US 2021/0183554 A1, Jun. 17, 2021
Int. Cl. H01F 7/02 (2006.01); B29C 33/32 (2006.01); B29C 45/17 (2006.01)
CPC H01F 7/0252 (2013.01) [B29C 33/32 (2013.01); B29C 45/1742 (2013.01); B29C 2045/1746 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A magnetic clamp device having a plate including a magnetic body for magnetically clamping a mold, a permanent magnet disposed adjacent a front side of said plate so as to surround a magnetic pole member, and a reversible magnet capable of reversing polarity disposed adjacent a back side of said plate,
wherein said magnetic pole member includes a plurality of magnetic pole pieces, each of said magnetic pole pieces having a first surface with a shape corresponding to an opposing surface of the permanent magnet and a second surface opposing an adjacent magnetic pole piece,
second surfaces of adjacent magnetic pole pieces being arranged with a gap therebetween, and said first surface being in contact with said permanent magnet, and
said magnetic pole pieces are held in position from the front side and the back side of the plate.