| 摘要 |
PURPOSE:To aim at the enhancement of work efficiency at the time of assembling, the reduction of cost and lengthening life by using a permanent magnet whose basic components are R (at least one kind of rare earth elements including Y)-M(at least one kind of transition metal elements)-X(at least one kind of IIIb group elements) and which is made by dissolving and casting the basic components and then processing a casting ingot in hot. CONSTITUTION:In a rodless cylinder, R-M-X is the basic components of the piston portion 2 of the rodless cylinder which performs the movement of an object using the magnetizing force of a permanent magnet, and the permanent magnet 3 used for an outside moving portion 1. The permanent magnet which is made by dissolving and casting the basic components and then processing a casting ingot in hot is used. Further, the permanent magnet is made to be aeolotropic in the radial direction or the axial direction. In this way, work efficiency at the time of assembling is enhanced, cost is reduced by the enhancement of yield and its life is lengthened. |
