JP2008042967A - Resin sealing method of permanent magnet to laminated core of rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin sealing method of a permanent magnet to the laminated core of a rotor in which the filling work of resin material can be done immediately without being influenced by preheating work of the laminated core of a rotor, and its work efficiency can be enhanced as compared with prior art by preventing the resin material from being left in the die. <P>SOLUTION: The resin sealing method of a permanent magnet to the laminated core of a rotor comprises a first step for placing the laminated core 13 of a rotor in a preheater 18 and preheating the laminated core 13 of a rotor, a second step for taking out the preheated laminated core 13 of a rotor from the preheater 18 and arranging it in a resin sealing device 29, a third step for pressing the laminated core 13 of a rotor by means of an upper die 14 and a lower die 15 and liquefying a resin material 17 in a resin sump pot 16 by heating, and a fourth step for pushing out the liquefied resin material 17 from the resin sump pot 16 by means of a plunger 32 inserted into the resin sump pot 16 to move up and down and filling a magnet insertion hole 12 with the resin material 17 and then thermosetting the resin material 17. With such an arrangement, resin sealing efficiency of the permanent 11 to the laminated core 13 of a rotor is enhanced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a resin sealing method of a permanent magnet to a rotor laminated core in which the permanent magnet is fixed with a resin material.

Conventionally, a method of fixing a permanent magnet with a resin material has been proposed as a method of fixing a permanent magnet to a rotor laminated iron core used in a motor. As a specific method, for example, Patent Document 1 discloses a rotor laminated core in which a plurality of core pieces are laminated and a plurality of magnet insertion holes for inserting a permanent magnet around a central shaft hole are formed. Is set in a resin sealing device (also referred to as a resin filling device) having an upper die and a lower die, and then a liquid resin is inserted into a magnet insertion hole into which a permanent magnet is inserted from a resin reservoir pot provided in the upper die. A method is disclosed in which a resin material is heated and cured by filling the material and heating the laminated iron core.
Further, Patent Document 2 discloses that segment magnets are placed in a rotor laminated iron core in which a rotor shaft is inserted, preheated, and then attached to an upper die and a lower die, and molten resin is injected. .

JP 2002-34187 A Utility Model Registration No. 25277656

However, in the resin sealing method of Patent Document 1, the rotor laminated iron core is obtained by laminating iron core pieces punched from electromagnetic steel sheets, so that a liquid resin material melted by heating is filled in the magnet insertion hole. In this case, there is a problem that the temperature of the resin material is lowered, the fluidity is lowered and the filling is difficult, and the hardening is difficult even if the filling is performed.
Therefore, after the rotor laminated core is set in a resin sealing device having an upper die and a lower die, the rotor laminated iron core is heated to the melting temperature of the resin material by a heater incorporated in the upper die and the lower die. The resin material in a liquid state with good fluidity is supplied into the magnet insertion hole and cured, so that the permanent magnet placed in the magnet insertion hole can be firmly held by the resin material.

However, since the melting temperature of the resin material (for example, epoxy resin) is as high as about 170 ° C., for example, it takes several tens of minutes for the rotor laminated core to reach the melting temperature of the resin material. The resin material could not be filled into the insertion hole. Therefore, the filling operation of the resin material is greatly influenced by the preheating operation of the rotor laminated core with the upper and lower heaters, and the work efficiency of filling the resin material (productivity of the resin sealing device) is greatly reduced. It was.

On the other hand, Patent Document 2 proposes preheating the rotor laminated cores to be mounted on the upper die and the lower die, but the time for preheating the rotor laminated iron core is longer than the time for resin sealing the rotor laminated iron core. It is not disclosed that this is longer, and in order to increase the working efficiency, it is disclosed that the rotor laminated iron cores preheated for a plurality of times the resin sealing time are sequentially prepared to increase the overall working efficiency. Not.
Further, in Patent Document 2 (the same applies in Patent Document 1), resin pumping means for injecting resin into the rotor laminated core is provided in addition to the upper mold and the lower mold. Since only resin passages are formed from this resin pumping means, when a thermosetting resin is used as the sealing resin, the resin remaining in the mold after injecting the resin into the rotor laminated core However, in order to smoothly perform the next resin sealing operation, there is a problem in that it is necessary to remove the resin remaining in the mold by dividing the mold.

The present invention has been made in view of such circumstances, so that the resin material filling operation can be performed immediately without being affected by the preheating operation of the rotor laminated core, and further, the resin material is not left in the mold. Thus, an object of the present invention is to provide a resin sealing method of a permanent magnet to a rotor laminated core that can improve the working efficiency compared to the conventional one.

According to the first aspect of the invention, the permanent magnet resin sealing method for the laminated rotor core includes a plurality of magnet insertion holes in which a plurality of core pieces are stacked and a permanent magnet is inserted around a central shaft hole. A first step of putting the rotor laminated iron core formed with in a preheating device and preheating the rotor laminated iron core;
The rotor laminated iron core that has been preheated is taken out of the preheating device, and the rotor laminated iron core in which the permanent magnet is inserted is disposed between an upper mold and a lower mold that form a resin sealing device. Two steps,
The upper die and the lower die press the rotor laminated core, and a plurality of the die formed from either the upper die or the lower die is extended to a surface in contact with the rotor laminated core. A third step of heating the resin material in the resin reservoir pot to a liquid state;
The plunger that is inserted into each resin reservoir pot and moves up and down pushes the resin material in liquid form from the resin reservoir pot and fills one or more magnet insertion holes corresponding to each resin reservoir pot. And a fourth step of curing the resin material.

Note that the preheating temperature of the rotor laminated core may be equal to the melting temperature of the resin (for example, 150 ° C. to 180 ° C.), or may be a high temperature or a low temperature in a range of ± 20 ° C. When the preheating temperature of the rotor laminated core is increased, the fluidity of the resin material in the rotor laminated core is increased, the filling time is shortened, and the productivity can be improved. Also, by lowering the preheating temperature of the rotor laminated core, the deformation of the rotor laminated core due to the temperature is reduced, but depending on the structure of the rotor laminated core, an unfilled portion of resin material occurs, so the rotor It is preferable to set an appropriate preheating temperature according to the shape and height of the laminated core.
Moreover, the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on 2nd invention is the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on 1st invention, The said rotor lamination | stacking iron core is The processes in the first to fourth steps are performed in the state of being placed on the transport tray.

According to a third aspect of the present invention, there is provided a resin sealing method of a permanent magnet to a rotor laminated iron core according to a second aspect of the present invention, wherein the transport tray is the rotor. There is a mounting plate portion on which the laminated iron core is placed, and a guide shaft portion which is in the center of the mounting plate portion and is inserted into the central shaft hole of the rotor laminated core.

According to a fourth aspect of the present invention, there is provided a resin sealing method of a permanent magnet to a rotor laminated iron core according to a third aspect of the present invention. The mounting tray can be attached to and detached from the plate portion, and the transport tray can handle a plurality of types of rotor laminated cores.

The resin sealing method of the permanent magnet to the rotor laminated core according to the fifth invention is the resin sealing method of the permanent magnet to the rotor laminated iron core according to the first invention. An insertion hole is provided in which a lifting shaft having a function of expanding and contracting is inserted through the shaft hole of the rotor laminated core, and the rotor laminated core is placed on the lower mold in the second step. Then, the raising / lowering shaft is fitted into the shaft hole to position the rotor laminated core.

According to a sixth aspect of the present invention, there is provided a resin sealing method of a permanent magnet to a rotor laminated iron core according to a fifth aspect of the present invention, wherein the rotor laminated core is placed on the rotor laminated iron core according to the fifth invention. It is mounted on the lower mold through a plate portion, and the mounting plate portion is provided with an auxiliary insertion hole into which the elevating shaft is inserted.

The resin sealing method of the permanent magnet to the rotor laminated core according to the seventh invention is the resin sealing method of the permanent magnet to the rotor laminated iron core according to the first invention. An insertion hole is provided in which a lifting shaft having a function of expanding and contracting is inserted through the shaft hole of the rotor laminated core, and the rotor laminated core is placed on the lower mold in the second step. Then, the raising / lowering shaft is fitted into the shaft hole to position the rotor laminated core.

According to an eighth aspect of the present invention, there is provided a resin sealing method of a permanent magnet to a rotor laminated core, wherein the rotor laminated core is placed on the rotor laminated core according to the seventh aspect. It is mounted on the lower mold through a plate portion.

The resin sealing method of the permanent magnet to the rotor laminated core according to the ninth invention is the resin sealing method of the permanent magnet to the rotor laminated iron core according to the first to eighth inventions, wherein the resin reservoir pot is The resin material is formed on the inner side or the outer side in the radial direction with respect to the magnet insertion hole, and the resin material is formed on the surface where the mold comes into contact with the rotor laminated core or the rotor laminated iron core from the resin reservoir pot. The magnet insertion hole is filled through the resin flow path.

The resin sealing method of the permanent magnet to the rotor laminated iron core according to the tenth invention is the resin sealing method of the permanent magnet to the rotor laminated iron core according to the first to ninth inventions, wherein the resin reservoir pot is It is formed through the mold.

The resin sealing method of the permanent magnet to the rotor laminated core according to the eleventh invention is the resin sealing method of the permanent magnet to the rotor laminated iron core according to the first to tenth inventions, in the first step. The rotor laminated core to be preheated is performed in a state where the permanent magnet is inserted into the magnet insertion hole in advance.

The resin sealing method of the permanent magnet to the rotor laminated core according to the twelfth invention is the resin sealing method of the permanent magnet to the first to tenth rotor laminated cores, wherein the rotation performed in the first step. Pre-heating of the laminated core is performed in a state where the permanent magnet is not inserted into the magnet insertion hole, and after the pre-heating is completed, the permanent magnet is inserted into the magnet insertion hole.

According to a thirteenth aspect of the present invention, there is provided a resin sealing method of a permanent magnet to a rotor laminated core, wherein the permanent magnet resin sealing method to a rotor laminated core according to the first to twelfth aspects is the first step. The rotor laminated core to be preheated is performed by any one or more of heating by an electric heater, induction heating, and heating by hot air.

And the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on 14th invention is a resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on 1st-13th invention. The preheating time of the rotor laminated core in the process is 2 to 6 times the resin sealing process time in the second process, the third process, and the fourth process.

The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claims 1-14 is between the upper mold | type and lower mold | type of the resin sealing apparatus used in order to fill each magnet insertion hole with the resin material. Before placing the rotor laminated core, the rotor laminated core is put in the preheating device and preheated, so the rotor laminated iron core that has been preheated is taken out of the preheating device and placed between the upper die and the lower die. Thus, the resin material can be filled immediately. As a result, as compared with the conventional case where the preheating of the rotor laminated core and the filling operation of the resin material are performed using the same apparatus, the filling operation of the resin material advances the preheating of the rotor laminated core. It is less affected by the situation, and the efficiency of the work of filling the rotor laminated iron core with the resin material can be greatly improved.
And since the resin reservoir pot formed in the upper mold or the lower mold extends to the surface in contact with the rotor laminated iron core and is pushed out by the plunger that moves up and down, the cured resin remains in the upper mold or the lower mold. And has the advantage of being extremely easy to clean.

And in the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 2, the process in a 1st process-a 4th process is performed in the state in which the rotor lamination | stacking iron core was mounted in the conveyance tray. Therefore, it is easy to convey the rotor laminated iron core, and furthermore, the rotor laminated iron core is rarely wrinkled or deformed during the carrying process.
In the resin sealing method of the permanent magnet to the rotor laminated iron core according to claim 3, the guide shaft portion that is inserted through the shaft hole in the center of the rotor laminated iron core is provided at the center of the transport tray. Positioning of the rotor laminated core placed on the transport tray at the shaft portion can be performed accurately.

In the resin sealing method of the permanent magnet to the rotor laminated iron core according to claim 4, since the guide shaft portion can be attached to and detached from the mounting plate portion, by exchanging the guide shaft portion, The transfer tray can handle a plurality of types of rotor laminated cores having different shaft holes.

In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 5, 6, In the center of a lower mold | type, the raising / lowering axis | shaft which has an expansion / contraction function inserted in the shaft hole of a rotor lamination | stacking iron core, and diameter-expanding In the resin sealing method of the permanent magnet to the rotor laminated core according to claims 7 and 8, the diameter of the permanent magnet is increased by being inserted into the shaft hole of the rotor laminated core in the center of the upper mold. After the rotor stacking iron core is placed on the lower mold in the second step, the lifting shaft is inserted into the shaft hole, and the rotor stacking is performed. Position the iron core. That is, the rotor stacking iron core can be positioned by inserting the elevating shaft through the shaft hole of the rotor stacking iron core.

In particular, in the resin sealing method of the permanent magnet to the rotor laminated core according to claim 5, 7, the rotor laminated core is directly placed on the lower mold, and the rotor is laminated by a lifting shaft having an expansion / contraction function. When positioning the iron core, the transfer tray (mounting plate portion) is not required, and the rotor laminated core can be provided at low cost.

In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 9, a resin reservoir pot is formed in the area | region inside or the radial direction with respect to a magnet insertion hole, and a resin material is a resin reservoir pot. Since the upper mold or the lower mold in which this is formed is filled into the magnet insertion hole through the surface in contact with the rotor laminated iron core or the resin flow path formed in the rotor laminated iron core, the apparatus can be simplified. Become.

The resin sealing method of the permanent magnet to the rotor laminated iron core according to claim 10, wherein the resin reservoir pot is formed through the corresponding upper mold or lower mold, so that the plunger fitted into the resin reservoir pot is taken in and out This facilitates maintenance and inspection of the apparatus.

In the resin sealing method of the permanent magnet to the rotor laminated core according to claim 11, preheating of the rotor laminated iron core performed in the first step is performed in a state where the permanent magnet is inserted in the magnet insertion hole in advance. Thus, the rotor core can be preheated and the permanent magnet can be preheated simultaneously.

In addition, as in the resin sealing method of the permanent magnet to the rotor laminated iron core according to claim 12, the preheating of the rotor laminated iron core performed in the first step is a state in which no permanent magnet is inserted into the magnet insertion hole. After the preheating is completed, a permanent magnet can be inserted into the magnet insertion hole. That is, depending on the kind of permanent magnet, there is a thing that magnetism decreases by heat. In this case, after heating the laminated iron core and the permanent magnet separately and heating the permanent magnet to an appropriate temperature (for example, 100 to 160 ° C.), Furthermore, you may put in the magnet insertion hole of the rotor lamination | stacking iron core heated at high temperature.

In the resin sealing method of the permanent magnet to the rotor laminated core according to claim 14, the preheating time of the rotor laminated core in the first step is the resin sealing in the second step, the third step and the fourth step. Since it is 2 to 6 times the processing time, the rotor laminated core can be preheated smoothly and the preheat treatment and the resin sealing process can be continued without waiting for the completion of preheating of one rotor laminated core. Work efficiency is improved.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
FIG. 1 is an explanatory view of a resin sealing device used in the resin sealing method of the permanent magnet to the rotor laminated core according to the first embodiment of the present invention, and FIG. 2 is to the rotor laminated core. 3 is a plan view of a rotor laminated iron core to which the permanent magnet resin sealing method is applied, FIG. 3 is an explanatory diagram of a permanent magnet resin sealing method to the rotor laminated iron core, and FIG. FIG. 5 is an explanatory view of a preheating device used in a permanent magnet resin sealing method, and FIG. 5 is a rotor laminated iron core to which a permanent magnet resin sealing method is applied to a rotor laminated iron core according to a second embodiment of the present invention. FIG. 6 is a partial cross-sectional side view of the same, FIG. 7 is a plan view of a rotor laminated iron core to which a permanent magnet resin sealing method is applied to a rotor laminated iron core according to a third embodiment of the present invention. 8 and 9 are explanatory views of a resin sealing method of permanent magnets to the rotor laminated core according to the fourth embodiment of the present invention (FIG. 10 is a cross-sectional view taken along the line AA in FIG. 8, and FIG. 11 is a resin seal of permanent magnets to the rotor laminated core according to the fifth embodiment of the present invention. It is explanatory drawing of the stop method.

The resin sealing method of the permanent magnet to the rotor laminated core according to the first embodiment of the present invention is formed around the rotor laminated iron core (also referred to as a rotor) 13 as shown in FIGS. Before the permanent magnets 11 are resin-sealed in the plurality of magnet insertion holes 12 respectively, the rotor laminated iron core 13 is preheated to around a predetermined temperature to increase the efficiency of the subsequent resin sealing work. Here, the resin sealing of the permanent magnet 11 is performed by connecting the rotor laminated iron core 13 having a plurality of magnet insertion holes 12 into which the permanent magnets 11 are inserted into the upper mold 14 and the lower mold 15 of the resin sealing device 29 (these The resin material 17 is inserted into the magnet insertion hole 12 from a resin reservoir pot (hereinafter also simply referred to as a pot) 16 provided in the upper mold 14 corresponding to the magnet insertion hole 12. Filling is performed with the permanent magnet 11 fixed. Hereinafter, the whole resin sealing method of the permanent magnet to this rotor lamination | stacking iron core is demonstrated in detail.

First, a preparatory process for preparing a rotor laminated core (hereinafter also simply referred to as a laminated core) 13 to be put into the preheating device 18 is performed.
The laminated iron core 13 is configured by punching an electromagnetic steel sheet having a thickness of, for example, 0.2 mm or more and 0.5 mm or less in an annular shape and sequentially laminating a plurality of punched iron core pieces. In addition, fixation of the laminated | stacked several iron core piece can use either one or both of caulking coupling and welding joining, for example.

The laminated core 13 is placed on a transport tray 19 from which dust or the like has been removed in advance, and the depth of the magnet insertion hole 12 is inserted into each magnet insertion hole 12 formed around the central shaft hole 10 of the laminated core 13. A permanent magnet 11 having a slightly lower height is inserted. After this operation, whether or not the permanent magnet 11 has been inserted into each magnet insertion hole 12 is confirmed by a magnet detector (not shown). The transport tray 19 is a rectangular plate-shaped mounting plate portion 21 with which the lower surface 20 of the laminated iron core 13 abuts, and a rod-like shape that is erected at the center of the mounting plate portion 21 and fits into the shaft hole 10 of the laminated iron core 13. And a guide shaft portion 22. The guide shaft portion 22 can be attached to and detached from the mounting plate portion 21. In addition, 10a shown in FIG. 2 is a detent | locking (protrusion) of the laminated iron core 13. As shown in FIG.

Next, as shown in FIG. 3, the transport tray 19 on which the laminated core 13 is placed is transported along the transport rail 23 to the preheating device 18, and the laminated iron core 13 is put together with the transport tray 19 in the preheating device 18. The iron core 13 is preheated to the melting temperature of the resin material 17 (first step).
The laminated iron cores 13 that have been transported by the transport rails 23 are respectively put into the preheating devices 18 that are arranged in a plurality (three in this case) on the side of the transport rails 23. Then, after preheating the laminated iron core 13 to the melting temperature of the resin material 17 in the preheating device 18, the laminated iron core 13 having been preheated is taken out from the preheating device 18 together with the conveying tray 19 and conveyed to the next step. As this resin material, for example, a thermosetting resin such as an epoxy resin conventionally used for manufacturing a semiconductor can be used. Thus, when using an epoxy resin as a resin material, since the melting temperature is, for example, about 170 ° C., the preheating temperature of the laminated iron core 13 is about 170 ° C. or higher within a range of ± 10 to 20 ° C. Or, the temperature is low. Note that the number n of the preheating devices (precisely, stages for preheating the rotor laminated core) is T1 when the total processing time of the resin sealing device is T1, and T2 is the total processing time of the preheating device. It is good to set it as the integer (for example, 2-6) which does not exceed T1), and this can operate a preheating apparatus and a resin sealing apparatus efficiently.

For example, as shown in FIG. 4, the preheating device 18 includes a lower heating unit 24 on which the transfer tray 19 is placed, and an elevating unit (for example, a jack) provided on the fixed base 25 for moving the lower heating unit 24 up and down. 26. Further, the preheating device 18 has an upper heating part 27 positioned above the laminated core 13 that has been raised to the upper limit position by the elevating means 26 and a side heating part 28 that surrounds the laminated iron core 13 from the side. Yes. The side heating unit 28 is divided into two parts in the horizontal direction, and the divided parts can be opened and closed by moving in the horizontal direction around the laminated core 13. Making it easy.
Each heating unit 24, 27, 28 provided in the preheating device 18 is provided with an electric heater, and the laminated iron core 13 is heated by this electric heater, but the laminated iron core 13 may be induction heating or heating with hot air, Alternatively, any two or more of heating by an electric heater, induction heating, and heating by hot air may be combined.

This preheating device is configured to preheat the laminated iron core together with the transport tray, but may be configured to preheat only the laminated iron core. Moreover, although the case where the several preheating apparatus was installed was demonstrated, one unit | set may be sufficient, and it is preferable to make the preheating apparatus the magnitude | size provided with the capacity | capacitance which puts a some laminated iron core in this case. Furthermore, it is also possible to provide a tunnel-type preheating device on the conveyance rail and preheat the laminated iron core in the preheating device while conveying the conveyance tray on which the laminated iron core is placed on the conveyance rail.
Here, the preheating of the laminated iron core is performed in a state where a permanent magnet is inserted in each magnet insertion hole in advance, but is performed in a state where no permanent magnet is inserted in each magnet insertion hole, and after the preheating is completed. A permanent magnet can be inserted into the magnet insertion hole.

Next, the laminated iron core 13 that has been preheated and taken out from the preheating device 18 is conveyed to the resin sealing device 29 by the conveying rail 23 together with the conveying tray 19, and the laminated iron core 13 is arranged in the resin sealing device 29 ( Second step).
As shown in FIG. 1, the resin sealing device 29 is, for example, placed on the lower mold 15 on which the transport tray 19 on which the laminated core 13 is placed can be moved up and down, and the laminated core 13. And an upper die 14 that is configured to rise as the lower die 15 rises. The upper mold 14 has a plurality of resin reservoir pots 16 for putting a raw material (also referred to as a tablet) of the resin material 17 in a region radially inward with respect to the magnet insertion hole 12 of the laminated iron core 13. A resin flow path (also referred to as a runner) 30 for guiding the molten liquid resin material 17 into the magnet insertion hole 12 is provided. FIG. 2 shows the resin reservoir pot 16 and the resin flow path 30 with phantom lines (two-dot chain lines). The resin reservoir pots 16 are provided so as to penetrate the upper mold 14 vertically. That is, the resin reservoir pot 16 extends to the bottom surface of the upper mold 14 (the surface in contact with the rotor laminated core 13).

In addition, the resin sealing device 29 includes a fixed gantry 31 that is fixedly disposed with a gap serving as a work space for inserting the resin material 17 with respect to the upper mold 14 in the lower limit position, and a fixed gantry 31. It has a plurality of plungers 32 that pressurize the resin material 17 that has penetrated and has been introduced into the pot 16 of the raised upper mold 14, and a stopper 33 that holds the upper mold 14 in the raised limit position.
The fixed base 31 is attached to an upper fixing plate 34, and the lower mold 15 is a lifting plate 37 that moves up and down along four guide posts 36 that connect the upper fixing plate 34 and the lower fixing plate 35. It is mounted on. Note that heating means (not shown) is provided inside the fixed base 31 to heat the plunger 32 in advance to facilitate the extrusion of the resin material 17 and to heat the fixed base 31 and the upper mold 14. The expansion difference is eliminated, and the gap between the plunger 32 and the pot 16 is eliminated.

The elevating plate 37 is moved up and down by lower mold elevating means (for example, a jack) 38 provided on the lower fixed plate 35. In addition, the plunger 32 inserted into each pot 16 is configured to move up and down in the pot 16 at the same timing by the plunger driving means 39 provided on the upper fixing plate 34.
The laminated iron core 13 disposed between the upper mold 14 and the lower mold 15 of the resin sealing device 29 having such a configuration is pressed by the upper mold 14 and the lower mold 15, and the resin material 17 in the pot 16 is pressed. The raw material is heated with the upper mold 14 to become liquid (third step)
.
Then, the plunger 32 pushes out the liquid resin material 17 from the pot 16, fills the corresponding magnet insertion hole 12 through the resin flow path 30, and heat cures the resin material 17. (4th process)
At this time, the liquid resin material 17 pushed out from the pot 16 is filled into the magnet insertion hole 12 through the resin flow path 30, that is, between the bottom of the upper mold 14 and the surface of the laminated core 13. The

Note that the temperature of the laminated iron core 13 at the time of filling the resin material 17 is preferably equal to or higher than the temperature at the time of preheating the laminated iron core 13 by the preheating device 18 within a range of ± 20 ° C. Thereby, for example, liquefaction, filling, and curing of the resin material can be performed efficiently, and further, deformation of the rotor laminated core can be prevented.
As described above, since the laminated iron core 13 is preheated, the laminated iron core 13 filled with the resin material is further heated by the heating means provided in the upper mold 14 and the lower mold 15 of the resin sealing device 29, respectively. By heating, the resin material can be filled and cured in a shorter time. The resin material may be heated using a heating device different from the resin sealing device 29.

Thus, the laminated iron core 13 filled with the resin material 17 in the magnet insertion hole 12 and cured is conveyed by the conveying rail 23 together with the conveying tray 19, and the laminated iron core 13 is cooled by a cooling device (for example, a spot cooler). Thus, the temperature of the heated laminated iron core 13 is lowered. Then, the resin material 17 protruding from the inside of the magnet insertion hole 12 and cured on the surface of the laminated iron core 13 is removed, and the surface of the laminated iron core 13 from which the resin material 17 has been removed is further polished as necessary. The total thickness of the laminated core 13 is measured. If the laminated thickness of the laminated iron core 13 is a target thickness, rust preventive oil is sprayed on the surface of the laminated iron core 13 and shipped as a product.
Thus, since the laminated core 13 is preheated in a process (different apparatus) different from the filling operation of the resin material 17, the resin material is not affected by the preheated operation of the laminated core 13, and the resin sealing device 29 uses the resin material. 17 filling operations can be carried out immediately, and the work efficiency can be improved as compared with the prior art.

Subsequently, regarding the resin sealing method of the permanent magnet to the rotor laminated core according to the second embodiment of the present invention, the resin sealing of the permanent magnet to the rotor laminated core according to the first embodiment. Only the differences from the method will be described. As the resin sealing device, as shown in FIGS. 5 and 6, a device having an upper mold 40 in which no resin flow path is formed can be used.
In this case, a resin flow path (runner) for guiding the liquid resin material 17 from the resin reservoir pot 42 provided in the upper mold 40 into the magnet insertion hole 43 of the rotor laminated core 41 at the upper end of the rotor laminated iron core 41. 44). This resin flow path can be formed only in the core piece located at the upper end portion of the rotor laminated core 41 or a plurality of core pieces including the core piece, and is appropriately set according to the thickness of the core piece. It is possible. In the present embodiment, the resin flow path 44 is formed by two pieces of the iron core piece positioned at the upper end portion of the rotor laminated iron core 41 and the iron core piece adjacent thereto.
Here, 45 in FIG. 5 is a detent (protrusion) of the rotor laminated core 41.
In the above embodiment, the heating means is provided in each of the upper mold and the lower mold, but the heating means may be provided only in the upper mold. Moreover, although the some resin reservoir pot is provided in the area | region inside radial direction with respect to the magnet insertion hole of a laminated iron core, you may provide in the area | region outside radial direction. And although the case where the resin reservoir pot was provided in the upper mold | type of the resin sealing apparatus was demonstrated, you may provide in the other part of the resin sealing apparatus, for example, a lower mold | type. In this case, at least the lower mold is provided with a heating means for making the resin material raw material liquid.

Subsequently, with respect to the resin sealing method of the permanent magnet to the rotor laminated core according to the third embodiment of the present invention with reference to FIG. 7, the difference from the first and second embodiments. Only explained.
In this embodiment, the upper die 4 is provided with respect to the eight magnet insertion holes 47 in which the permanent magnets 11 are respectively provided around the central shaft hole 10 of the rotor laminated core 46. Resin material is supplied from two resin reservoir pots 48 via resin flow paths 49 and 50. That is, the resin material is supplied from one resin reservoir pot 48 to a plurality of (two or more) magnet insertion holes 47. In this case, the resin flow paths 49 and 50 may be provided in the upper mold or may be provided on the upper surface of the rotor laminated core 46. Thus, the resin sealing device can be simplified by reducing the number of the resin reservoir pots.

Next, a resin sealing method of a permanent magnet to a rotor laminated core according to the fourth embodiment of the present invention will be described with reference to FIGS. First, the resin sealing device 52 used in this method will be described. Four guide posts 54 are provided at the corners of the lower fixing plate 53, and an elevating plate 55 is attached to the guide posts 54 so as to be movable up and down. ing. The elevating plate 55 is attached to the lower fixed plate 53 and supported by a hydraulic cylinder 56 (described only on the left side in FIGS. 8 and 9) which is an example of the lower die elevating means. Thus, the lower die 57 attached to the elevating plate 55 can be moved up and down along the guide post 54.

Four guide rods 58 penetrating the lower fixing plate 53 are provided at the bottom of the elevating plate 55, and the auxiliary elevating table 59 is supported by the four guide rods 58 so as to be movable up and down. The auxiliary lifting table 59 is provided with hydraulic cylinders 60 constituting two lifting means on the front and rear (shown on the right side in FIGS. 8 and 9), and the auxiliary lifting table 59 is moved up and down with respect to the lifting plate 55. I am letting.

A lifting shaft 61 having an expansion / contraction function is provided at the center of the auxiliary lifting table 59. The elevating shaft 61 has a structure in which the rotor laminated core 13 is directly positioned by entering the shaft hole 10 of the rotor laminated core 13 directly mounted on the lower mold 57 without a transport tray from below. The expanding / contracting function of the elevating shaft 61 is divided into a plurality of parts in the circumferential direction and has an outer cylinder 62 having a tapered part whose diameter is expanded on the upper side inside, and a core part 63 having a tapered part on the outside that matches the tapered part of the outer cylinder 62. And a hydraulic cylinder 64 for raising and lowering the core portion 63, and the outer cylinder 62 is expanded or contracted by raising and lowering the core portion 63. In addition, a positioning groove (not shown) into which the outer cylinder 62 is fitted with a detent 10a (see FIG. 2, not shown in FIGS. 8 to 10) projectingly formed in the shaft hole 10 (in the following embodiments). The same). In addition, insertion holes 65 and 66 that are slightly larger than the diameter of the shaft hole 10 of the rotor laminated core 13 (for example, about 1 to 5 mm larger) are provided in the center of the lower mold 57 and the lift plate 55, and the lift shaft 61 is It can be moved up and down smoothly.

Therefore, in the resin sealing method of the permanent magnet to the rotor laminated core according to the fourth embodiment, the rotor laminated core 13 preheated to a predetermined temperature by the preheating device is transported (not shown) (for example, The robot hand) is mounted at a predetermined position of the lower die 57, and the lifting shaft 61 in a reduced state is lifted, and the diameter of the lifting shaft 61 is increased to position the rotor laminated core 13.

Next, the upper die (not shown) is lowered and the lower die 57 is raised to clamp the rotor laminated iron core 13 from above and below, and the rotor laminated iron core is heated by a heater (not shown) arranged on the upper die and the lower die 57. 13 is heated, and the resin material in the molten state in the resin reservoir pot provided in the upper mold is filled into the magnet insertion hole 12 of the rotor laminated core 13 through the resin flow path, and the resin material is cured. At that time, the upper die is raised and the lower die 57 is lowered as necessary to take out the rotor laminated core 13. In addition, about resin sealing to the magnet insertion hole 12 of the rotor lamination | stacking iron core 13, resin sealing of the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on the 1st-3rd embodiment mentioned above. Processing is applicable.
By doing in this way, a conveyance tray can be abbreviate | omitted and the cost concerning manufacture of a rotor lamination | stacking iron core can be held down.

Subsequently, a resin sealing method of the permanent magnet to the rotor laminated core according to the fifth embodiment of the present invention will be described with reference to FIG. 11, but the mounting plate portion on which the rotor laminated core 13 is placed. Since the method is basically the same as the resin sealing method of the permanent magnet to the rotor laminated core according to the fourth embodiment except that 70 is provided, the same reference numerals are used for detailed description. Omitted.
That is, in the resin sealing method of the permanent magnet to the rotor laminated core according to the fifth embodiment, the rotor laminated core 13 is placed on the mounting plate portion 70 and conveyed. The mounting plate portion 70 is provided with an auxiliary insertion hole 71 having the same shape as the insertion hole 65 provided in the lower mold 57. Thus, the lifting shaft 61 can be inserted into the shaft hole 10 of the rotor laminated core 13 through the insertion hole 66 of the lifting plate 55, the insertion hole 65 of the lower mold 57, and the auxiliary insertion hole 71 of the mounting plate part 70. Thereafter, the rotor laminated core 13 can be positioned by expanding and contracting.

In the resin sealing method of the permanent magnet to the rotor laminated core according to the fourth and fifth embodiments, the lifting shaft 61 is moved up and down through the lower mold 57, but the center of the upper mold It is also possible to position the rotor laminated iron core by providing an insertion hole in the upper die and raising and lowering the raising and lowering shaft and inserting a lifting shaft having an expansion / contraction function in the shaft hole of the rotor laminated iron core.
In this case, the rotor laminated iron core may be placed directly on the lower mold or may be placed on the placement plate portion. In this case, the mounting plate portion may or may not be provided with an auxiliary insertion hole into which the elevating shaft is fitted.
Moreover, in the resin sealing method of the permanent magnets to the rotor laminated cores according to the fourth and fifth embodiments, the inner diameters of the insertion holes 65 and 66 and the auxiliary insertion hole 71 are provided in the rotor laminated core 13. It is preferably about 1 to 5 mm larger than the shaft hole 10.

The present invention has been described above with reference to the embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and the scope of matters described in the claims. Other embodiments and modifications conceivable in the above are also included. For example, the case where the resin sealing method of the permanent magnet to the 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.
Moreover, in the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on 4th Embodiment, when not raising / lowering a lower mold | type, it is 3 through 3 or more resin flow paths from one resin reservoir pot. The present invention is also applied to the case where two or more magnet insertion holes are filled with resin. Moreover, you may provide the insertion hole in which a raising / lowering shaft fits in an upper mold | type.

The method for sealing a permanent magnet to a rotor laminated iron core of the present invention includes a rotor laminated iron core between an upper mold and a lower mold of a resin sealing apparatus used for filling a resin material into each magnet insertion hole. Since the rotor laminated core can be preheated with sufficient time before placing the rotor, processing can be performed without causing thermal deformation or the like in the rotor laminated core.
In addition, by providing a plurality of preheating devices with a long processing time for the rotor laminated core for one resin sealing device, the resin sealing device with a short processing time can be operated continuously, and the resin of the rotor laminated core The efficiency of the sealing work can be increased.
Furthermore, since the resin sealing pot is provided on the upper die or the lower die that is in direct contact with the rotor laminated iron core, and the resin material is pushed out by the plunger fitted into the resin sealing pot, the resin sealing pot can be cleaned. Simplification improves workability.

It is explanatory drawing of the resin sealing apparatus used with the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on the 1st Embodiment of this invention. It is a top view of the rotor lamination | stacking iron core which applies the resin sealing method of the permanent magnet to the same rotor lamination | stacking iron core. It is explanatory drawing of the resin sealing method of the permanent magnet to the same rotor lamination | stacking iron core. It is explanatory drawing of the preheating apparatus used with the resin sealing method of the permanent magnet to the same rotor lamination | stacking iron core. It is a top view of the rotor lamination | stacking iron core which applies the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on the 2nd Embodiment of this invention. FIG. It is a top view of the rotor lamination | stacking iron core which applies the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on the 3rd Embodiment of this invention. It is explanatory drawing of the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on the 4th Embodiment of this invention. It is explanatory drawing of the resin sealing method of the permanent magnet to the same rotor lamination | stacking iron core. It is arrow AA sectional drawing in FIG. It is explanatory drawing of the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core which concerns on the 5th Embodiment of this invention.

Explanation of symbols

10: shaft hole, 10a: detent, 11: permanent magnet, 12: magnet insertion hole, 13: rotor laminated iron core, 14: upper mold, 15: lower mold, 16: resin reservoir pot, 17: resin material, 18 : Preheating device, 19: Transport tray, 20: Lower surface, 21: Placement plate section, 22: Guide shaft section, 23: Transport rail, 24: Lower heating section, 25: Fixed mount, 26: Lifting means, 27: Upper section Heating unit, 28: side heating unit, 29: resin sealing device, 30: resin flow path, 31: solid mount, 32: plunger, 33: stopper, 34: upper fixing plate, 35: lower fixing plate, 36: Guide post, 37: Elevating plate, 38: Lower die elevating means, 39: Plunger driving means, 40: Upper die, 41: Rotor laminated iron core, 42: Resin reservoir pot, 43: Magnet insertion hole, 44: Resin flow path 45: Non-rotating, 46: Rotor lamination 47, magnet insertion hole, 48: resin reservoir pot, 49, 50: resin flow path, 52: resin sealing device, 53: lower fixing plate, 54: guide post, 55: lifting plate, 56: hydraulic cylinder, 57: Lower mold, 58: Guide rod, 59: Auxiliary lifting table, 60: Hydraulic cylinder, 61: Lifting shaft, 62: Outer cylinder, 63: Center core, 64: Hydraulic cylinder, 65, 66: Insertion hole, 70 : Loading plate part (conveyance tray), 71: Auxiliary insertion hole

Claims (14)

A first step of preheating the rotor laminated core by placing a rotor laminated core in which a plurality of core pieces are laminated and a plurality of magnet insertion holes for inserting permanent magnets around a central shaft hole are formed in a preheating device. When,
The rotor laminated iron core that has been preheated is taken out of the preheating device, and the rotor laminated iron core in which the permanent magnet is inserted is disposed between an upper mold and a lower mold that form a resin sealing device. Two steps,
The upper die and the lower die press the rotor laminated core, and a plurality of the die formed from either the upper die or the lower die is extended to a surface in contact with the rotor laminated core. A third step of heating the resin material in the resin reservoir pot to a liquid state;
The plunger that is inserted into each resin reservoir pot and moves up and down pushes the resin material in liquid form from the resin reservoir pot and fills one or more magnet insertion holes corresponding to each resin reservoir pot. And a fourth step of curing the resin material. A method for sealing a permanent magnet to a rotor laminated core. 2. The method of sealing a permanent magnet to a rotor laminated core according to claim 1, wherein the rotor laminated core is placed on a transport tray and the processes in the first to fourth steps are performed. A resin sealing method of a permanent magnet to a rotor laminated iron core characterized by the above. The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 2 WHEREIN: The said conveyance tray is in the center of this mounting board part and the said board rotation plate | board part which mounts the said rotor lamination | stacking iron core, and the said rotation. A resin sealing method of a permanent magnet to a rotor laminated core, comprising a guide shaft portion that is inserted into a central shaft hole of the rotor laminated core. The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 3 WHEREIN: The said guide shaft part becomes attachment / detachment with respect to the said mounting plate part, and the said conveyance to several types of rotor lamination | stacking iron cores A resin sealing method of a permanent magnet to a rotor laminated iron core, characterized in that the tray can be adapted. In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 1, the raising / lowering axis | shaft which has the expansion / contraction function which penetrates the shaft hole of the said rotor lamination | stacking iron core and expands in diameter at the center of the said lower mold | type. An insertion hole to be inserted is provided, and after the rotor laminated core is placed on the lower mold in the second step, the elevating shaft is fitted into the shaft hole to position the rotor laminated core. The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core characterized by performing this. In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 5, the said rotor lamination | stacking iron core is mounted on the said lower mold | type via a mounting board part, and the said mounting board part has the said An auxiliary insertion hole into which the elevating shaft is inserted is provided. In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of Claim 1, the raising / lowering axis | shaft which has an expansion / contraction function inserted in the axial hole of the said rotor lamination | stacking iron core at the center of the said upper mold | type core is expanded. An insertion hole to be inserted is provided, and after the rotor laminated core is placed on the lower mold in the second step, the elevating shaft is fitted into the shaft hole to position the rotor laminated core. The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core characterized by performing this. 8. The method of sealing a permanent magnet to a rotor laminated core according to claim 7, wherein the rotor laminated core is mounted on the lower mold via a mounting plate portion. A method of resin sealing a permanent magnet to a laminated iron core. The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of any one of Claims 1-8 WHEREIN: The said resin reservoir pot is formed in the area | region inside radial direction or an outer side with respect to the said magnet insertion hole. The resin material is filled into the magnet insertion hole from the resin reservoir pot through the surface where the mold comes into contact with the rotor laminated core or the resin flow path formed in the rotor laminated iron core. A resin sealing method for permanent magnets to a rotor laminated iron core. The resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of any one of Claims 1-9 WHEREIN: The said resin reservoir pot is formed through the said metal mold | die, The rotation characterized by the above-mentioned. A resin sealing method for permanent magnets to a child laminated iron core. In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of any one of Claims 1-10, the preheating of the said rotor lamination | stacking iron core performed at the said 1st process is previously in the said magnet insertion hole. A method of sealing a permanent magnet to a rotor laminated core, which is performed in a state where the permanent magnet is inserted. In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of any one of Claims 1-10, the preheating of the said rotor lamination | stacking iron core performed at the said 1st process is the said magnet insertion hole in the said magnet insertion hole. A method for sealing a permanent magnet to a rotor laminated iron core, wherein the permanent magnet is inserted into the magnet insertion hole after the preheating is completed after the permanent magnet is not inserted. In the resin sealing method of the permanent magnet to the rotor lamination | stacking iron core of any one of Claims 1-12, the preheating of the said rotor lamination | stacking iron core performed at the said 1st process is heating by an electric heater, induction heating. And a method of sealing a permanent magnet to a rotor laminated iron core, which is performed by any one or more of heating with hot air. The method for resin sealing a permanent magnet to a rotor laminated core according to any one of claims 1 to 13, wherein a preheating time of the rotor laminated core in the first step is the second step, A resin sealing method of a permanent magnet to a rotor laminated iron core, characterized in that it is 2 to 6 times the resin sealing processing time of the third step and the fourth step.

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