Method of resin sealing permanent magnets in laminated rotor core
AssigneeMitsui High-Tec, Inc.
InventorsKatsumi Amano, Kazutoshi Ueda
Life of this patent
Estimating the term…
Abstract
A method comprising: a first process of placing a laminated rotor core in a preheating device to preheat the laminated core; a second process of removing the preheated laminated core from the preheating device and disposing the laminated core between upper and lower dies of a resin sealing apparatus; a third process of pressing the laminated core by the upper and lower dies and liquefying resin material in resin reservoir pots by heating; and a fourth process of ejecting the liquefied resin material from the pots into the magnet insertion holes by plungers inserted and moving vertically in the pots and thermally curing the resin material. The method improves efficiency of resin sealing the permanent magnets in the laminated core.
Claims5
A method of producing a laminated rotor core being formed by a stack of a plurality of core pieces and having a plurality of magnet insertion holes for insertion of permanent magnets, the method comprising:
- a first process of disposing the laminated rotor core between upper and lower dies of a resin sealing apparatus after preheating of the laminated rotor core;
- a second process of pressing the laminated rotor core by the upper and lower dies and liquefying resin material in a plurality of resin reservoir pots by heating, the resin reservoir pots penetrating either one of the upper and lower dies so as to extend to a surface thereof that contacts the laminated rotor core;
- and
- a third process of ejecting the liquefied resin material from each of the resin reservoir pots by a plunger to fill corresponding one or more of the magnet insertion holes with the resin material and curing the resin material, the plunger being inserted and moving vertically in the each of the resin reservoir pots,
- wherein the resin material is overflowed from the magnet insertion holes and cured and is removed.
Dependencies are inferred from the claim text.