In a method of manufacturing a magnet embedded core (1), creation of unnecessary resin from the resin for fixedly securing the magnet is prevented. The method includes a resin charging step of charging resin material (33) in solid form into the magnet insertion hole; a melting step of melting the resin material (33) in the magnet insertion hole, and a pressurization step of pressurizing an interior of the magnet insertion hole (3). The melting step includes melting the resin material (33) at least partly by preheating and inserting the magnet (4) into the magnet insertion hole (3).

To prevent the axial compressive force that acts on the rotor core from becoming unnecessarily large and to enable a high-quality magnet embedded core to be manufactured efficiently, a retaining jig (10) for a rotor core (2) including a magnet insertion hole (4) forming a through hole defining openings on end surfaces in an axial direction includes: a first plate (12) configured to contact against one of the end surfaces of the rotor core (2) and including a gate (20) configured to communicate with the corresponding opening of the magnet insertion hole (4); a second plate (14) configured to oppose another of the end surfaces of the rotor core (2); a closure member (26) coupled to the second plate (14) via a compression spring member (28) and configured to be capable of closing the opening of the magnet insertion hole (4) on the other of the end surfaces; and a coupling member (30) that couples the first plate (12) and the second plate (14) to each other such that the closure member (26) closes the opening and a spring force of the compression spring member (28) becomes a prescribed value.

A tool, in particular for encapsulating or casting rotors of electric machines, having an arrangement space which extends along a longitudinal axis and is designed to arrange and encapsulate or cast a component, wherein the arrangement space is delimited at least in sections by at least one adjusting tool, the position of which can be adjusted in such a way that a size of the arrangement space can be changed.

A resin molding method includes a first step of supplying electricity to and heating a stator coil via a stator terminal in a state that the stator terminal clamped; and a second step of molding an insulating resin at a coil end of the heated stator coil. The first step places the stator terminal on a conducting terminal block in such a state that clamping of the stator terminal by the conducting terminal block and a terminal holding member is released, before supplying electricity to the stator coil, and lifts up and down the conducting terminal block, such that the portion of the stator terminal becomes within a predetermined range.

This rotor core manufacturing method includes a step of moving a stacked core that remains mounted to a jig and that has a resin material injected in a magnet holding portion, from a resin injection apparatus to a curing heater apparatus that is separate from the resin injection apparatus, and a step of curing the resin material in the magnet holding portion by heating the stacked core in the curing heater apparatus.

This rotor core manufacturing method includes a step of retracting a resin injection portion of a resin injection apparatus relative to a stacked core that remains pressed by a jig, while maintaining a resin material stored in the resin injection portion in a molten state.

According to one embodiment, a method for manufacturing an iron core product includes providing an iron core body which includes a magnet insertion hole in which a permanent magnet is disposed, injecting a molten resin into the magnet insertion hole of the iron core body at a first pressure, and setting a pressure applied to the molten resin to a second pressure lower than the first pressure after the molten resin is injected into the magnet insertion hole and before the molten resin is cured.

The manufacturing method of a motor core includes attaching an ID code to a stack of blanked members in which a magnet insertion hole to fill with a resin material is formed, the ID code containing information in accordance with a type of the stack, reading the information from the ID code which is attached to the stack, and setting a mold condition based on the information read from the ID code. The mold condition includes at least one type of condition including: the resin material to be injected to the magnet insertion hole, an injection amount of the resin material, and a discharge position of the resin material. A mold device is controlled to inject the resin material to the magnet insertion hole in accordance with the mold condition.

An object of the present invention is to suppress an outflow of varnish from a lower portion of a stator core by increasing a filling rate of varnish in a slot. Provided is a method for manufacturing a stator of a rotary electric machine. The stator has a coil and a stator core in which a slot that houses the coil is formed, and a resin member of which viscosity is low at a first temperature and the viscosity is high at a second temperature higher than the first temperature is filled in the slot from an injection side. The manufacturing method includes a first step of causing a temperature difference in the stator core such that the injection side becomes the first temperature and an opposite side of the injection side becomes the second temperature, and a second step of injecting the resin member from the injection side in a state in which the temperature difference is maintained.

To automate setting of coupling rods when using a rotor core retaining jig and thereby to improve the production efficiency of a magnet embedded core, a setting device includes: a support base (42) on which the rotor core retaining jig (10) is to be placed; an opposing base (46) joined to the support base 42 to oppose the support base (42); a pressurizing device (48) provided on the opposing base (46) and configured to pressurize an upper plate (14) of the rotor core retaining jig (10) on the support base (42) toward a lower plate (12); chuck devices (126) provided on the support base (42) to releasably grip the coupling rods (30) and capable of moving between a separated position where the coupling rods (30) are separated from engagement grooves (32, 34) and an engaged position where the coupling rods (30) engage the engagement grooves (32, 34); and a fluid pressure cylinder device (120) provided on the support base (42) to drive each chuck device (126) between the separated position and the engaged position.