# US 2014/0196276 A1 · Method of manufacturing laminated rotor core > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196276 A1 - Document ID: US20140196276A1 - Status: Published application - Kind: A1 - Application number: 14/152,014 - Filed: 2014-01-10 - Published: 2014-07-17 - Earliest claimed: 2013-01-15 - Assignees: Mitsui High-Tec, Inc. - Applicants: Mitsui High-Tec, Inc. - Inventors: Akira Nagai; Go Kato; Mei Ogata - Web page: https://patentgrep.com/patent/US20140196276A1 ## CPC - H02K 15/03: having permanent magnets - H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines - Y10T 29/49012: Rotor - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract There is provided a method of manufacturing a laminated rotor core, including: a mounting step of placing a core body on a carrier tray, the core body having a plurality of magnet insertion holes provided around the shaft hole, the carrier tray having a mount plate and a columnar guide member standing on a front surface of the mount plate 41, the placement of the core body being carried out by fitting the guide member into the shaft hole; an inserting step of inserting permanent magnets respectively in the magnet insertion holes; an injecting step of injecting a liquefied resin material in each of the magnet insertion holes; and a first preheating step of heating the core body before the mounting step, wherein the inserting step and the injecting step are carried out in a state in which the core body is placed on the carrier tray. ## Claims ### Claim 1 A method of manufacturing a laminated rotor core, the method comprising: a mounting step of placing a core body on a carrier tray, the core body having a plurality of core sheets that are laminated on each other and having a shaft hole provided in the center of the core body and a plurality of magnet insertion holes provided around the shaft hole, the carrier tray having a mount plate and a columnar guide member standing on a front surface of the mount plate, the placement of the core body being carried out by fitting the guide member into the shaft hole; an inserting step of inserting permanent magnets respectively in the magnet insertion holes; an injecting step of injecting a liquefied resin material in each of the magnet insertion holes; and a first preheating step of heating the core body before the mounting step, wherein the mounting step, the inserting step, and the injecting step are carried out in the stated order, and the inserting step and the injecting step are carried out in a state in which the core body is placed on the carrier tray. ### Claim 2 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, wherein in the mounting step, a temperature of the core body is equal to or higher than that of the carrier tray. ### Claim 3 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, wherein in the inserting step, a temperature of the core body is equal to or higher than that of the permanent magnets. ### Claim 4 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, further comprising: a second preheating step of heating the core body between the inserting step and the injecting step. ### Claim 5 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, further comprising: a curing step of curing the resin material injected into the magnet insertion holes by heating the resin material; and a cooling step of cooling the carrier tray after the curing step, wherein the carrier tray cooled in the cooling step is repeatedly used. ### Claim 6 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, wherein the core body is constituted from a plurality of blocks divided in a laminating direction. ### Claim 7 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, wherein one of a heating furnace, a band heater, a rubber heater, and a hot plate is used for heating in the first preheating step. ### Claim 8 (depends on 7) The method of manufacturing a laminated rotor core according to claim 7, wherein the hot plate and a preheating fixture placed on the hot plate are used for heating in the first preheating step, the preheating fixture includes a mounting table for placing the core body, and a column portion extending higher than a front surface of the mounting table and to be inserted into the shaft hole of the core body, the core body is in a columnar shape, and a distance from the center of the column portion to an outer edge on the front surface of the mounting table is smaller than a radius of the core body. ### Claim 9 (depends on 1) The method of manufacturing a laminated rotor core according to claim 1, wherein the guide member and the mount plate of the carrier tray are provided in a separable manner. ### Claim 10 (depends on 9) The method of manufacturing a laminated rotor core according to claim 9, wherein the guide member is directly used as a shaft of the laminated rotor core.