JP2008011646A - Resin sealing method for laminated iron core of rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin sealing method for a laminated iron core of a rotor for inhibiting and preventing a resin member from generating an incomplete filling portion in magnet inserted sections, and economically manufacturing a high-quality product at high productivity. <P>SOLUTION: The resin sealing method for the laminated iron core of the rotor has a step of laminating a plurality of iron core pieces 10, and inserting permanent magnets 13 into a plurality of the magnet insertions 12 formed around a central axial hole 11. Then, the resin member 18 is fixed and injected from a resin reservoir 16 provided in one of upper mold 14 and a lower mold 15 into gaps 17 formed within the magnet insertions 12, in a state that the upper mold 14 and lower mold 15 are combined after the permanent magnets 13 are inserted. Flow rate/pressure adjusting members 25 vertically and movably provided in one or both of the upper mold 14 and the lower mold 15 are inserted into the gaps 17 at one point of time, (1) before the resin member 18 is injected, (2) while the resin member 18 is injected, and (3) after the resin member 18 is injected. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a resin sealing method for a rotor laminated core in which a permanent magnet is inserted into a plurality of magnet insertion portions provided around a shaft hole and fixed by a resin member.

Conventionally, a rotor laminated core (also referred to as a rotor core) used in a motor is formed by laminating a plurality of core pieces and a plurality of magnet holes (also referred to as magnet insertion portions) formed around a central shaft hole (also referred to as a shaft hole). After a permanent magnet is inserted into the magnet hole, the magnet hole is filled with a resin member and fixed from a resin reservoir pot (also referred to as a resin reservoir portion) provided in the mold (for example, Patent Document 1). reference). Specifically, when a permanent magnet is inserted into the magnet hole, a gap (that is, a gap generated between the surface of the permanent magnet and the inner surface of the magnet hole) is formed in the magnet hole. By solidifying, permanent magnets can be reliably fixed in each magnet hole.

JP 2002-34187 A

However, since the size of the gap formed in the magnet hole after insertion of the permanent magnet is different in each direction around the permanent magnet (front and rear, left and right), the resin member is poured into the gap and wraps around the permanent magnet. When the resin member is made to enter, the resin member first enters from a portion having a large gap size and gradually begins to harden. For this reason, for example, the resin member does not spread sufficiently in a portion having a small gap size or a corner portion of the magnet hole, and the gap is easily formed because the resin member is not filled.
Such a gap is likely to cause a crack in the resin member due to the centrifugal force that the permanent magnet receives due to the high-speed rotation of the rotor core when the manufactured rotor core is used as a product, and the fixation of the permanent magnet becomes unstable. There is a fear. Further, such a problem results in a decrease in product quality of the rotor core and a concomitant decrease in reliability.

In addition, at present, for the purpose of preventing the occurrence of such an unfilled portion of the resin member, when the resin member in the resin reservoir pot is pushed out to the magnet hole with the plunger, the resin member is not completely pushed out, and the surface of the iron core piece The injection pressure of the resin member is maintained so that the resin member having a predetermined height remains on the surface. For this reason, it cannot be avoided that unnecessary resin members solidified after molding remain in the resin reservoir pot and in the runner connecting the resin reservoir pot and the magnet hole on the surface of the iron core piece constituting the laminated iron core. It was.
However, since the remainder of such a resin member becomes an obstacle in the assembly of the rotor core later, it is necessary to remove it from the surface of the iron core piece, and a process and a dedicated device for that purpose must be prepared, and the rotor core is manufactured. This hinders shortening of time and manufacturing cost. In addition, generating unnecessary resin members in this way is a waste of materials and is not preferable from the viewpoint of environmental resources.

The present invention has been made in view of such circumstances, and it is possible to suppress and further prevent the occurrence of an unfilled portion of the resin member in the magnet insertion portion, and to rotate a product capable of producing a good quality product economically with high productivity. It aims at providing the resin sealing method of a child lamination iron core.

The method for resin sealing of a rotor laminated core according to the present invention in accordance with the above object is to laminate a plurality of iron core pieces and insert permanent magnets into a plurality of magnet insertion portions formed around a central shaft hole, respectively. From the resin reservoir provided in one of the upper mold and the lower mold in a state sandwiched between the upper mold and the lower mold, the permanent magnet is formed in each magnet insertion section after the permanent magnet is inserted. In the resin sealing method of the rotor laminated core that fills and fixes the resin member in the gap,
In the gap, (1) before injecting the resin member, (2) at the same time as injecting the resin member, and (3) at any one time after injecting the resin member, A flow pressure adjusting member provided to be movable up and down is inserted into one or both of the lower molds.

In the resin sealing method for a rotor laminated core according to the present invention, the time for inserting the flow rate pressure adjusting member is (1) before injecting the resin member into the gap, or (2) the resin member is inserted. It is preferable that the state in which a part or all of the flow rate pressure adjusting member is inserted into the gap is maintained at the same time as the injection until the injection of the resin member into the gap is completed.
In the resin sealing method for a rotor laminated iron core according to the present invention, the pressure applied by the flow pressure adjusting member to the resin member injected into the gap is more than the flow pressure of the resin member moving in the gap. It is preferable to set the pressure larger than the injection pressure of the resin member injected from the resin reservoir into the gap.
In the resin sealing method for a rotor laminated core according to the present invention, it is preferable that the flow rate pressure adjusting member is extracted from the gap according to the injection amount of the resin member injected into the gap.

In the resin sealing method for a rotor laminated core according to the present invention, after the injection of the resin member into the gap is completed, and before the resin member is cured, the flow pressure adjusting member is completely removed from the gap. It is preferable to extract the
In the resin sealing method for a rotor laminated core according to the present invention, it is preferable that a part or all of the flow pressure adjusting member is extracted from the gap after the resin member injected into the gap is cured.

In the resin sealing method for a rotor laminated core according to the present invention, it is preferable that one or a plurality of the flow pressure adjusting members are inserted into the gap formed in one magnet insertion portion.
In the resin sealing method for a rotor laminated core according to the present invention, after the resin reservoir portion is disposed at a position overlapping the magnet insertion portion in plan view, the plunger provided in the resin reservoir portion is replaced with the mold. It is preferable that the resin member of the resin reservoir is pushed out into the gap by moving to a position where it contacts the surface of the iron core piece that is in contact with the core.

The resin sealing method for a rotor laminated core according to any one of claims 1 to 8, wherein (1) the resin member is injected into the gap formed in the magnet insertion portion after the permanent magnet is inserted, or (2) the resin member is When the flow pressure adjusting member is inserted at the same time as the injection, the resistance to the resin member in this portion can be increased and the fluid pressure can be lowered. This is effective when the flow rate pressure adjusting member is inserted into a portion having a particularly large dimension (a portion where the resin member easily enters and the inflow pressure is high) in the formed gap. Thereby, since the resin member can be easily passed to the portion where the size of the gap is small, the resin member can be spread to every corner of the gap, and the generation of the void in the gap can be suppressed and further prevented.
Further, when the flow pressure adjusting member is inserted into the gap after (3) the resin member is injected, a pressing pressure can be applied to the resin member in the gap. Thereby, even if an unfilled portion of the resin member is generated in the gap, the resin member pressed by the flow rate pressure adjusting member can be allowed to enter the unfilled portion.
Therefore, generation of an unfilled portion of the resin member in the magnet insertion portion can be suppressed and further prevented, and a rotor laminated iron core with good quality can be manufactured economically with high productivity.

In particular, the resin sealing method of the rotor laminated core according to claim 2 maintains a state in which a part or all of the flow pressure adjusting member is inserted into the gap until the injection of the resin member into the magnet insertion portion is completed. Therefore, the resin member can be surely spread to every corner of the gap.
Since the resin sealing method of the rotor laminated iron core according to claim 3 sets the pressing pressure applied by the flow pressure adjusting member to the resin member injected into the gap, the resin member is surely spread to every corner of the gap. In addition, the flow rate pressure adjusting member can be gradually extracted from the gap as the injection amount of the resin member from the resin reservoir to the gap increases. Thereby, for example, even if the injection amount of the resin member with respect to the gap volume is slightly less than the prescribed amount due to variations in the tablet shape constituting the resin member before liquefaction by heating, the flow pressure adjustment Since the member can play a role of supplementing the insufficient amount of the resin member, a part of the flow pressure adjusting member remains in the gap, and the resin member can be surely spread over every corner of the gap. it can.
Therefore, the permanent magnet can be fixed to the magnet insertion portion with an appropriate amount of resin member without generating unnecessary resin residue, so that the resin member is not wasted as in the prior art, and the resin member There is no occurrence of unfilled voids due to insufficient amount.

The resin sealing method of the rotor laminated iron core according to claim 4 is such that the flow pressure adjusting member is extracted from the gap according to the injection amount of the resin member to be injected into the gap. The resin member amount can be compensated for, and the resin member can be reliably spread over the corners of the gap.
The resin sealing method of the rotor laminated core according to claim 5, wherein the flow rate pressure adjusting member is extracted from the gap after the resin member has been injected into the gap and before the resin member is cured. It is not necessary to maintain the state until the member is solidified, and the resin member filling operation into the magnet insertion hole can be performed efficiently.
In the resin sealing method of the rotor laminated core according to claim 6, after the resin member injected into the magnet insertion portion is cured, a part or all of the flow pressure adjusting member is extracted from the gap. There is no fear of entrainment of air in the resin member when the member is extracted, and a product with stable quality can be manufactured.

In the method for sealing a rotor laminated core according to claim 7, one or a plurality of flow pressure adjusting members are inserted into a gap formed in one magnet insertion portion. For example, the number or insertion of flow pressure adjusting members is inserted. By appropriately selecting the location according to the size, position, or shape of the gap in the magnet insertion portion, the resin member can be reliably distributed to every corner of the gap.
In the resin sealing method of the rotor laminated core according to claim 8, after the resin reservoir portion is arranged at a position overlapping the magnet insertion portion in plan view, the plunger for pushing out the resin member is moved to a position where the plunger comes into contact with the surface of the core piece. Since it is movable, a permanent magnet can be fixed to each magnet insertion portion with an appropriate amount of the resin member without leaving an unnecessary resin member on the surface of the iron core piece. As a result, there is no need to use a mold provided with a resin flow path and a gate when injecting a resin member, so that unnecessary resin residue does not occur on the core surface, and removal of the resin residue that has been conventionally required The process itself becomes unnecessary, and for example, the manufacturing time and manufacturing cost of the rotor core can be greatly reduced.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 3, the resin sealing method for a rotor laminated core according to an embodiment of the present invention is formed by laminating a plurality of core pieces 10 and around a central shaft hole 11. After the permanent magnet 13 is inserted into each of a plurality of magnet insertion holes (an example of a magnet insertion portion) 12, the resin provided in the upper mold 14 in a state of being sandwiched between the upper mold (that is, the mold) 14 and the lower mold 15 A resin member 18 is filled and fixed from a reservoir pot (an example of a resin reservoir) 16 into a gap 17 formed in each magnet insertion hole 12 after the permanent magnet 13 is inserted. (Also referred to as a laminated iron core) 19. This will be described in detail below.

The laminated iron core 19 is formed by punching an electromagnetic steel sheet having a thickness of, for example, about 0.5 mm or less in an annular shape and sequentially laminating a plurality of punched iron core pieces 10. In addition, as a lamination | stacking method of the some iron core piece 10, although it can use combining any one or 2 or more of caulking, welding, and adhesion | attachment, you may just pile up.
A plurality of magnet insertion holes 12 penetrating in the vertical direction are formed at equal intervals around the shaft hole 11 formed in the center of the laminated core 10, and after inserting the permanent magnet 13 into each magnet insertion hole 12, The laminated iron core 19 is set in the resin sealing device 20, and the liquid resin member 18 is supplied and cured. As the resin member, for example, a thermosetting resin or a thermoplastic resin such as an epoxy resin conventionally used for manufacturing a semiconductor device can be used.
Here, the resin sealing device 20 to be used will be described.

As shown in FIGS. 1 and 2, the resin sealing device 20 has an upper mold 14 disposed above the laminated iron core 19 and a lower mold 15 disposed below, and the laminated layer disposed therebetween. The iron core 19 is pressed by the upper mold 14 and the lower mold 15. The upper mold 14 is provided with a resin reservoir pot 16 that heats the raw material (pellet shape) of the resin member 18 to be liquid and extends to the end of the upper mold 14 that contacts the laminated core 19. ing. The upper mold 14 is further provided with a resin flow path 21 that allows the resin reservoir pot 16 and the magnet insertion hole 12 to communicate with each other.
In the resin reservoir pot 16 of the resin sealing device 20, a plunger 22 that can be moved up and down is provided via an O-ring (an example of a seal member) 23. By this plunger 22, the liquid resin member 18 pushed out from the resin reservoir pot 16 causes the resin flow path 21 provided at the downstream end of the resin reservoir pot 16, that is, the lower surface of the upper mold 14 and the laminated iron core 19. It passes between the upper surfaces and fills the magnet insertion hole 12.

The upper mold 14 is provided with a flow pressure adjusting member 25 that can be moved up and down by the lifting means 24 via an O-ring (an example of a seal member) 26. This flow pressure adjusting member 25 is normally housed in the upper die 14 and protrudes downward from the lower surface of the upper die 14 to adjust the inflow pressure of the resin member 18 injected into the gap 17 in use. Furthermore, it also functions as a volume adjusting member that adjusts the volume of the gap 17.
A plurality (two in this case) of the flow pressure adjusting members 25 are inserted into the gap 17 formed in one magnet insertion hole 12, but may be one, for example, depending on the size or shape of the gap. In addition, although the insertion location of this flow pressure adjustment member 25 is a location where the dimension is large, that is, both sides of the permanent magnet 13 in the formed gap 17, it may be only one side.

The flow pressure adjusting member 25 is made of metal or resin and has a rod shape and a circular cross section. For example, depending on the size or shape of the gap, the cross sectional rectangle (square or rectangular), the elliptical cross section, Or you may make it a cross-sectional polygon. The surface of the flow pressure adjusting member 25 is coated with a coating material such as, for example, a fluororesin or silicone in order to improve the peelability from the resin member 18.
In addition, it is preferable that the cross-sectional area of the flow pressure adjusting member 25 is, for example, about 20% to 80% (preferably the lower limit is 30% and the upper limit is 50%) of the flat cross-sectional area of the gap 17 to be formed. .
For example, a hydraulic cylinder, a pneumatic cylinder, or a spring material that is an elastic member can be used as the lifting / lowering means 24 that moves the two flow pressure adjusting members 25 up and down simultaneously.

The flow pressure adjusting member 25 has been described as being provided on the upper die 14, but may be provided on the lower die 15, or may be provided on both the upper die 14 and the lower die 15.
In addition, the lower mold 15 opposite to the upper mold 14 provided with the resin reservoir pot 16 is vented to release the air in the magnet insertion hole 12 to the outside when the resin member 18 is injected into the magnet insertion hole 12. (Not shown) is provided.
The resin sealing device includes an upper mold and a lower mold (that is, a mold), and a resin seal pot in which a resin reservoir pot is formed on the lower mold by heating the raw material (pellet shape) of the resin member to make it liquid. A stop device can also be used.
Further, the plunger and the flow pressure adjusting member may be provided without using an O-ring.

The number of the resin reservoir pots 16 provided in the upper mold 14 of the resin sealing device 20 is the same as the number of the magnet insertion holes 12 provided in the laminated iron core 19, and a plurality thereof are provided at equal intervals in the circumferential direction. Thereby, the resin member 18 can be supplied from the resin reservoir pot 16 to the single (one) magnet insertion hole 12 via the resin flow path 21.
Note that the number of the resin reservoir pots 16 provided in the upper mold 14 of the resin sealing device 20 can be reduced more than the number of the magnet insertion holes 12 provided in the laminated iron core 19. Thereby, the resin member 18 can be supplied from the resin reservoir pot 16 to a plurality of (for example, two or three) magnet insertion holes 12 via the resin flow path 21. Depending on the shape of the laminated iron core, the number of resin reservoir pots 16 may be increased more than the number of magnet insertion holes 12.
Here, the resin reservoir pot 16 is provided on the radially inner side of the magnet insertion hole 12 in a plan view, but may be provided on the radially outer side.

By using such a resin sealing device 20, the resin member 18 is supplied to the gap 17 formed in the magnet insertion hole 12. At this time, (1) before injecting the resin member 18 into the gap 17, (2) simultaneously with the injection of the resin member 18 (that is, simultaneously with the movement of the plunger 22), and (3) after injecting the resin member 18 At any one of the times, the flow pressure adjusting member 25 is inserted into the gap 17.
First, the case where the flow rate pressure adjusting member 25 is inserted into the gap 17 (1) before the resin member 18 is injected into the gap 17 or (2) when the resin member 18 is injected at the same time will be described.
In this case, until the injection of the resin member 18 into the gap 17 is completed, a state in which a part or all of the flow pressure adjusting member 25 is inserted into the gap 17 is maintained. In addition, the completion of the injection of the resin member 18 is a state where the gap 17 formed by closing the magnet insertion hole 12 with the upper mold 14 is filled with the resin member 18, or the resin member 18 and the flow rate pressure adjusting member 25. It means a state of being partially filled (for example, about 90% by volume to 100% by volume of the gap 17).

Here, the pressure applied to the resin member 18 injected into the gap 17 by the flow pressure adjusting member 25 is greater than the flow pressure of the resin member 18 moving in the gap 17 and injected from the resin reservoir pot 16 into the gap 17. It is set smaller than the injection pressure of the resin member 18 to be performed.
As described above, the pressure applied to the resin member 18 by the flow pressure adjusting member 25 is made larger than the flow pressure of the resin member 18 that moves in the gap 17, so that the gap 17 is filled with the resin member 18. In the stage, the resin member 18 can easily enter the gap 17 from a portion having a large gap size to a small portion. Further, the pressure applied to the resin member 18 by the flow pressure adjusting member 25 is made smaller than the injection pressure of the resin member 18 injected from the resin reservoir pot 16 into the gap 17, so that the inside of the gap 17 has the resin member 18 and the flow pressure pressure. After filling with a part of the adjustment member 25, the flow rate pressure adjustment member 25 is gradually extracted from the gap 17 as the injection amount of the resin member 18 injected into the gap 17 increases.

Thus, the pressing pressure of the lifting / lowering means 24 that drives the flow pressure adjusting member 25 can be set based on the following equation.
P × S> F
Here, P is the pressure that the flow pressure adjusting member 25 receives from the resin member 18 (upward here), and S is the area that the flow pressure adjusting member 25 receives pressure from the resin member 18 (here, the flow pressure adjusting member 25). F is a force of the lifting / lowering means 24 that tries to push the flow pressure adjusting member 25 into the gap 17.
That is, based on the above-described force relationship, the capacity of the hydraulic cylinder or pneumatic cylinder, which is the lifting means 24, or the material of the spring material is selected.

The part or all of the flow pressure adjusting member 25 can be extracted from the gap 17 gradually by the control device based on the injection amount of the resin member 18 injected into the gap 17.
And the permanent magnet 13 inserted in the magnet insertion hole 12 can be fixed with the resin member 18 by heat-hardening the resin member 18 with which the magnet insertion hole 12 was filled.
Here, the resin member 18 is cured in a state in which a part of the flow pressure adjusting member 25 is immersed in the resin member 18 in the gap 17, and then the flow pressure adjusting member 25 is extracted from the gap 17. After the injection of the resin member 18 into the gap 17 is completed and before the resin member 18 is cured, the resin member 18 is cured with the flow rate pressure adjusting member 25 completely pulled out from the gap 17. May be.

Next, a case where the flow rate pressure adjusting member 25 is inserted into the gap 17 after (3) the resin member 18 is injected into the gap 17 will be described.
In this case, the amount of the resin member 18 injected from the resin reservoir pot 16 into the gap 17 is set smaller than the volume of the gap 17. Then, after the resin member 18 is injected and before the resin member 18 is cured, the flow rate pressure adjusting member 25 is pushed into the gap 17 so that the resin member 18 enters the unfilled portion of the resin member 18 in the gap 17. . Thereby, a state where no gap is generated in the gap 17, that is, the resin member 18 and the flow rate pressure adjusting member 25 are the same as the volume of the gap 17 (for example, about 90% to 100% by volume of the gap 17). To.
Then, after the resin member 18 injected into the gap 17 is cured, the flow rate pressure adjusting member 25 is extracted from the gap 17.

In addition, when the flow pressure adjusting member is made of resin, the flow pressure adjusting member is separated from the other portion without removing the flow pressure adjusting member from the gap to adjust the flow pressure adjusting member. A part or all of the member may be left in the gap.
In this case, the resin flow rate adjusting member does not need to be surface-coated to enhance the peelability, and the material is the same as the resin member or has a thermal expansion coefficient comparable to that of the resin member. What it has is preferable.

As the resin sealing device, as shown in FIGS. 4 and 5, a resin sealing device 27 in which the resin reservoir pot 16 is disposed at a position overlapping the magnet insertion hole 12 in plan view may be used. it can.
In this case, the plunger 22 provided in the resin reservoir pot 16 is moved to a position where it comes into contact with the surface of the iron core piece 10 that is in contact with the upper mold 28, so that the liquid resin member 18 in the resin reservoir pot 16 is separated by a gap. Extrude to 17.
Here, the resin reservoir pot 16 is arranged at a position overlapping with the central portion in the longitudinal direction of the single (one) magnet insertion hole 12 in a plan view, but a plurality of adjacent (here, two) magnets. You may arrange | position to the position where it overlaps with the longitudinal direction edge part of the insertion hole 12 planarly.
In addition, the resin reservoir pot 16 is disposed on the radially inner side of the magnet insertion hole 12 in plan view, but may be disposed on the radially outer side.
At this time, as in the case described above, the flow pressure adjusting member 25 can be inserted into the gap 17 before the resin member 18 is injected, simultaneously with the injection of the resin member 18, or after the resin member 18 is injected.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, the case where the resin sealing method for a rotor laminated core of the present invention is configured by combining some or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.

It is a fragmentary front sectional view of the magnet insertion hole which shows the injection | pouring condition of the resin member in the resin sealing method of the rotor lamination | stacking iron core which concerns on one embodiment of this invention. It is a partial sectional side view of the same magnet insertion hole. It is a top view of the magnet insertion hole. It is a fragmentary sectional side view which shows the injection | pouring condition of the resin member in the resin sealing method of the rotor lamination | stacking iron core which concerns on a modification. It is a top view of the magnet insertion hole.

Explanation of symbols

10: Iron core piece, 11: Shaft hole, 12: Magnet insertion hole (magnet insertion part), 13: Permanent magnet, 14: Upper mold, 15: Lower mold, 16: Resin reservoir pot (resin reservoir part), 17: Gap , 18: resin member, 19: rotor laminated core, 20: resin sealing device, 21: resin flow path, 22: plunger, 23: O-ring, 24: lifting means, 25: flow pressure adjusting member, 26: O Ring, 27: Resin sealing device, 28: Upper mold

Claims (8)

After laminating a plurality of iron core pieces and inserting permanent magnets into a plurality of magnet insertion portions formed around the central shaft hole, the upper mold and the lower mold are sandwiched between the upper mold and the lower mold. Resin sealing of a laminated rotor core in which a resin member is filled and fixed in a gap formed in each magnet insertion portion after insertion of the permanent magnet from a resin reservoir provided in any one of the molds In the method
In the gap, (1) before injecting the resin member, (2) at the same time as injecting the resin member, and (3) at any one time after injecting the resin member, A resin sealing method for a rotor laminated iron core, wherein a flow pressure adjusting member provided to be movable up and down is inserted into one or both of the lower molds. 2. The resin sealing method for a rotor laminated core according to claim 1, wherein the time for inserting the flow pressure adjusting member is (1) before injecting the resin member into the gap, or (2) the resin member. And a state in which a part or all of the flow rate pressure adjusting member is inserted into the gap until the injection of the resin member into the gap is completed. A resin sealing method for a laminated iron core. 3. The resin sealing method for a rotor laminated core according to claim 2, wherein the pressure applied by the flow pressure adjusting member to the resin member injected into the gap is greater than the flow pressure of the resin member moving in the gap. And a pressure smaller than the injection pressure of the resin member injected into the gap from the resin reservoir. The resin sealing method for a rotor laminated core according to any one of claims 2 and 3, wherein the flow rate pressure adjusting member is extracted from the gap according to an injection amount of the resin member injected into the gap. A resin sealing method for a rotor laminated iron core, characterized by: In the resin sealing method of the rotor lamination | stacking iron core of any one of Claims 2-4, after injection | pouring of the said resin member to the said clearance gap is completed, and before this resin member hardens | cures, the said A resin sealing method for a rotor laminated core, wherein the flow pressure adjusting member is completely extracted from the gap. In the resin sealing method of the rotor lamination | stacking iron core of any one of Claims 1-4, after hardening the said resin member inject | poured into the said clearance gap, a part or all of the said flow pressure adjustment member is the said. A resin sealing method for a rotor laminated core, which is extracted from a gap. The resin sealing method for a rotor laminated core according to any one of claims 1 to 6, wherein one or a plurality of the flow pressure adjusting members are inserted into the gap formed in one magnet insertion portion. A method for sealing a rotor laminated iron core characterized by the following. In the resin sealing method of the rotor lamination | stacking iron core of any one of Claims 1-7, after arrange | positioning the said resin reservoir part in the position which overlaps with the said magnet insertion part planarly, in the said resin reservoir part A rotor laminated iron core characterized in that a provided plunger is moved to a position where it comes into contact with the surface of the iron core piece in contact with the mold, and the resin member of the resin reservoir is pushed into the gap. Resin sealing method.

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