JP3725776B2 - Method for manufacturing laminated iron core and apparatus for manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for manufacturing a laminated iron core such as a motor and a transformer.
[0002]
[Prior art]
Conventionally, as a method of manufacturing laminated iron cores such as motors and transformers using electromagnetic steel sheets, steel sheets are punched into unit iron cores, and a predetermined number of unit iron cores are laminated and then bolted, caulked, welded or bonded. Generally, it is fixed using means such as an agent or varnish. After being fixed, the laminated iron core is subjected to processing such as incorporation of a winding coil, and the iron core of the transformer or motor is assembled.
[0003]
If the laminated iron core is weakly bonded, if the unit iron core is unwound or a gap is opened, the efficiency of coil winding work will be reduced, and in the case of a motor, it may cause noise and vibration. It is necessary to stick firmly.
However, when fixing by bolting, it is necessary to provide a through-hole through which the bolt passes in the laminated iron core, and if a through-hole is provided in the laminated iron core, the magnetic properties of the laminated iron core will deteriorate. Similarly, when the laminated iron core is fixed by welding, the welded portion is thermally strained, and by caulking, the magnetic properties of the laminated iron core may be deteriorated by being machined during dowel formation.
[0004]
When fixing the laminated iron core using an adhesive, after processing the steel sheet into an iron core shape, it is laminated and temporarily fixed with a clamp, etc., and then immersed in a bath containing an adhesive or varnish, or liquid Adhesive is dripped from above and the adhesive or varnish is infiltrated between the steel plates using the capillary action, and then fixed by heating, but the adhesive or varnish penetrates the entire surface of the steel plate. In particular, in the case of a motor stator, only the outer peripheral edge of the iron core penetrated by the adhesive is fixed, and the inner peripheral teeth become free and both ends of the laminate are lifted. In such a case, the viscosity of the adhesive or varnish is excessively lowered, and excess adhesive or varnish flows out, resulting in a decrease in fixing strength, or difficulty in processing the flowed out adhesive.
In addition, since it takes time for the adhesive and varnish impregnation to be fixed after application, there is a problem that workability is low.
[0005]
In order to solve such problems, Japanese Patent Application Laid-Open No. 57-3560 discloses that when a laminated iron core is fully impregnated, a hardener or a curing agent and a curing accelerator for an insulating material are previously added to a steel plate constituting the laminated iron core. A method of laminating, winding, winding, and impregnating is disclosed. This is because when the laminated iron core is fixed by impregnation, the impregnating resin is abruptly cured by attaching a curing agent in advance, thereby preventing the adhesive from flowing out and firmly fixing the steel plates together. At the same time, insulation is also ensured.
[0006]
[Problems to be solved by the invention]
However, even in this method, it is necessary to apply an adhesive to each steel sheet constituting the laminated iron core, and although the time until fixing can be shortened, the laminated iron core is processed after being processed into a unit iron core by punching or the like. It cannot be said that the problem that workability until fixing is low has been solved. Further, there is no need for complete impregnation, and there is no disclosure of dealing with a case where a laminated iron core is to be partially fixed.
The present invention solves the problems associated with fixing a laminated iron core using such an adhesive, and provides a method for obtaining a laminated iron core with good workability and an apparatus suitable for the method. .
[0007]
[Means for Solving the Problems]
The gist of the present invention is as follows.
(1) With a single mold base, the magnetic steel sheet is punched on the inner peripheral side, then punched on the outer peripheral side to form unit iron cores of a predetermined shape , and the unit iron cores are stacked and bonded together. In the manufacturing method of the laminated iron core that integrates the iron core , after punching the inner peripheral side of the unit iron core, during the punching of the outer peripheral side of the unit iron core (including when punching the outer peripheral side), the unit iron core The manufacturing method of the laminated iron core characterized by apply | coating the adhesive agent supplied from the adhesive application | coating male metal mold | die intermittently operated to the partial surface for every site | part used as this mold stand.
(2) The method for producing a laminated iron core according to the above item (1), wherein when the laminated iron core is fixed by the mold base, pressure is applied to the laminated iron core.
(3) With the above-mentioned mold base, after punching the inner peripheral side of the magnetic steel sheet , the outer peripheral side is punched , and a thermosetting adhesive is applied to each part to be a unit iron core of a predetermined shape, and the outer peripheral side is punched. (1) or (2) above, wherein the unit iron cores formed are laminated on the mold base, and the laminated iron cores are integrated by heating and pressurizing the laminated iron cores to a predetermined temperature. Manufacturing method of laminated iron core.
( 4 ) The method for producing a laminated iron core according to any one of (1) to ( 3 ), wherein a side pressure is applied to the iron core from a direction perpendicular to the lamination direction when the unit iron cores are laminated.
( 5 ) Unit iron core lamination which comprises an inner peripheral punching portion and an outer peripheral punching portion having a male punching die and a female punching die on one die base, and stacking punched unit iron cores includes a section on the mold base, while the adhesive supply unit for applying a partial surface of each region comprising an adhesive as a unit iron core of the inner circumferential stamped part and the outer peripheral punching unit or the outer peripheral punching A laminated iron core comprising: a unitary iron core that is laminated by using a pressing punch for laminating a unit iron core in a male die for outer peripheral punching of the outer peripheral punched portion. Manufacturing equipment.
( 6 ) The apparatus for producing a laminated iron core according to ( 5 ), wherein the unit iron core laminated part is provided with a pressure mechanism.
( 7 ) The apparatus for producing a laminated iron core according to ( 5 ) or ( 6 ) above, wherein the unit iron core laminated part is provided with a pressure and heating mechanism.
(8) Unit iron core laminated iron core of the manufacturing apparatus according to any one of the above items, characterized in that the iron core to be laminated on the laminated unit to have a damper mechanism for applying a lateral pressure (5) to (7) .
In the present invention, two or more unit iron core lamination parts are provided, and after a predetermined number of sheets are laminated, a replacement device is provided that immediately replaces the lamination parts, and further, a unit iron core discharge device is provided, so that Allows punching and fixing.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is described in detail below.
In the present invention, the electromagnetic steel sheet used for the laminated iron core may be a non-oriented electromagnetic steel sheet or a directional electromagnetic steel sheet, and a general steel sheet may be used as the electromagnetic steel sheet. Further, a high Si material, an amorphous alloy, or the like can be used, and is particularly suitable for use of a thin steel plate having a thickness of 0.10 to 0.35 mm. However, the material having a normal thickness is not limited.
[0009]
The processing of the unit iron core in the present invention requires an apparatus for punching a steel sheet into a unit iron core shape by a punching die, and after processing into a unit iron core shape with a punching die of the punching part, When unit iron cores are continuously laminated, the iron core is fixed by applying an adhesive to the surface of the steel sheet or the laminated end face.
[0010]
Although it does not specifically limit as an adhesive agent used by this invention, An acrylic resin adhesive agent, a cyanoacrylate type adhesive agent, an epoxy resin adhesive agent, a polyester adhesive agent, a polyurethane adhesive agent, a melamine resin adhesive agent, a phenol resin adhesive agent Various adhesives such as can be used. More suitable is a thermosetting organic resin adhesive that undergoes a chemical reaction by heating, specifically, one or more of epoxy resin, phenol resin, urethane resin, melamine resin, etc. Is an adhesive mainly composed of Also suitable are polyesters, acrylic resins and the like to which a crosslinking agent has been added to impart thermosetting properties. Moreover, you may use the inorganic adhesive which a dehydration condensation reaction advances by heating, and the normal temperature curing type inorganic adhesive which has calcium phosphate etc. as a main component.
[0011]
In the case of heating in the present invention, as heating means to be used, electric heating, induction heating, dielectric heating, electromagnetic wave irradiation, direct contact heating, etc. can be used, and although not particularly limited, direct contact heating by an electric heater has a structure. Simple and suitable. In this invention, it is possible to heat-harden the adhesive apply | coated to the laminated iron core rapidly by installing the said heating apparatus in a laminated part and heating.
[0012]
Next, as a method of applying pressure to fix the iron core, a pressure punch is used in the present invention, but the pressure punch can be used also as a male die of a punching die. In this case, when the predetermined number of punches is reached, it is possible to apply a large pressure to the laminated iron core by making the male stroke larger than the normal punch stroke, thereby further increasing the fixing strength. it can. Moreover, in order to make the fixed laminated iron core stronger, after this step, it may be heated under pressure again.
[0013]
In this invention, you may use the method of apply | coating one sheet at a time before laminating | stacking as a coating method of an adhesive agent . When the adhesive is applied to the surface of the steel sheet one by one, it can be bonded without degrading workability by providing an adhesive coating die inside the male or female punching die or inside the pressure punch. It is possible to apply an agent .
[0014]
The present invention is characterized in that the adhesive is applied and fixed.
The partial surface referred to in the present invention is an internal partial surface, and refers to the place where the iron core surface enters the center from the outer edge and the inner edge respectively when applying the adhesive to the steel sheet surface, and the partial surface near the center. Apply to. In other words, in the case of the EI core, it is desirable to apply it in a dot-like manner to a substantially equidistant portion when entering the inside from both ends of the straight portion.
[0015]
Furthermore, the end face referred to in the present invention is a case where it is applied from both the outer peripheral side and the inner peripheral side end face or from one side, and in the case of a motor core, the inner side from the outer peripheral side and the inner peripheral side of the core back part, respectively. When entering, in order to balance the fixing portion, when fixing the tooth portion, it is preferable to be away from the tooth side. Each fixing location does not need to be completely separated from the end portion, and may be fixed from the end portion of the iron core to the vicinity of the center.
[0016]
In the case of the EI core, the number of fixing points is 3 to 6 points for the E core, 2 to 3 points for the I core, and 4 to 12 points on the core back part for the stator of the motor. It is desirable to apply also to the part, and about 2 to 10 points are suitable for the rotor.
[0017]
When the adhesive is applied from the end face of the laminate, the outer peripheral portion is 4 to 10 points in the case of an EI core, and the outer peripheral portion is 4 to 12 points in the case of a motor stator. Alternatively, in the case of a rotor, it is preferable to continuously apply 2 to 6 points in the stacking direction.
[0018]
In the present invention, an adhesive may be applied from the laminated end surface of the laminated iron core, but the end portion of the iron core is not fixed, but the portion entering the inside is partially adhered.
[0019]
FIG. 3 shows a state where an adhesive is applied to the steel sheet surface of the E core. The shaded part is the part where the adhesive is applied. The spread state of the adhesive varies depending on various factors such as the viscosity of the adhesive to be used, the amount of adhesion, and the familiarity with the steel sheet. In the case of the E core, one or two portions are bonded to each straight portion.
[0020]
FIG. 4 shows a state in which an adhesive is applied to the stator core of the motor using the apparatus of FIG. When an adhesive is applied from the laminated end surface to each tooth tip and four core back portions, the adhesive flows between the unit iron cores by the capillary phenomenon and spreads on the iron core surface.
[0021]
FIG. 5 shows an example of a state in which the E core is fixed by the prior art. In order to prevent the stacking from shifting, it is clamped from above and below, soaked in a bath filled with epoxy adhesive, impregnated, taken out, heated in an oven at 150 ° C, and the bonded one is divided to show the adhesion status of the adhesive It is a thing. Since the adhesive was tightened with a clamp, it adhered only to the end of the unit core surface. There are parts that are well bonded and parts that are not.
[0022]
FIG. 6 shows an example of a state in which the stator core of the motor is fixed by the prior art. Insert a cylinder that matches the inner diameter of the stator into the iron core so that the stacking does not shift, press it with a pressing jig from the stacking direction, apply the adhesive to the outer periphery of the iron core, apply hot air with a dryer, and bond it. It is divided to show the bonding situation. Since the adhesive is attached only to the end portion of the outer peripheral portion, the adhesive is not attached to each tooth portion, and is in a free state.
[0023]
In the present invention, it can be used in combination with other fixing methods. In the case of a motor stator, it is possible to fix the outer peripheral portion by caulking and fix each tooth on the inner periphery using an adhesive.
[0024]
In the present invention, when heating, a heat insulating member can be installed between the punching die and the heating device. The temperature required for curing the organic resin thermosetting adhesive is generally between 150 to 250 ° C., and 400 to 700 ° C. in the case of an inorganic adhesive. Since high accuracy is required, it is necessary to prevent heat from being transmitted to the heated portion by the heat insulating member so that the mold does not expand. The heat insulating member used here is desirably a material having high heat resistance such as ceramics, but is not particularly limited.
[0025]
In the present invention, when heating is required, the laminated iron core is heated to a predetermined temperature by a heating device installed adjacent to the laminated portion after or after the predetermined number of unit iron cores are laminated. At this time, it is possible to align the end surfaces of the laminated iron cores using a side pressure device provided with a damper mechanism from the side surfaces of the laminated unit iron cores in the middle of the lamination.
[0026]
Further, in the present invention, it is possible to further increase the efficiency by providing two or more laminated portions and installing the laminated portion movable device so that these can be alternately arranged immediately after the punched portions. After completion of lamination or whenever the unit iron core is supplied, the pressure is applied by a pressure device to cure the adhesive, and the laminated unit iron cores are bonded in whole or in part to fix the iron core. The arrangement of the laminated parts is not limited to a method of moving in the direction perpendicular to the steel sheet supply direction, but may be a rotating method in which a large number of laminated parts are arranged in a circle, or other methods may be used.
Further, after the unit iron cores are stacked, when the unit core is moved from the position immediately after the punched portion, it is possible to press the pressure again with a pressurizing device and fix the unit cores more firmly.
[0027]
A configuration example of an apparatus suitable for the iron core manufacturing method of the present invention described above will be described below.
A punching unit having a male punching die and a female punching die is provided, and a unit iron core laminated portion for laminating the punched unit iron cores is provided separately, and the adhesive is punched into the unit iron. By providing an adhesive supply section that is applied to a partial surface or end face of the core, the laminated unit iron cores can be integrated. Regarding the adhesive supply section, the unit iron core laminated section is applied to the unit iron core laminated section end face, and the case where the unit iron core is partially coated on the surface of the unit iron core is provided with an adhesive supply section. It is preferable.
[0028]
Further, when the unit iron core is firmly fixed, it is possible to provide a pressurizing mechanism in the unit iron core laminated portion. As a pressurizing mechanism, a press punch or a press punch can be used as a male die of a punching die. Furthermore, in the case of using a thermosetting adhesive, it is possible to provide a heating mechanism in the unit iron core laminated portion in addition to the above pressurization. As the heating mechanism, energization heating, induction heating, dielectric heating, electromagnetic wave irradiation, direct contact heating and the like can be considered.
[0029]
Furthermore, in the unit iron core laminated portion, a side pressure device provided with a damper mechanism may be used so that the end faces of the laminated iron core can be aligned from the side surfaces of the unit iron cores laminated or in the middle of lamination. Is possible. Moreover, in this invention, it is also possible to install a laminated part movable apparatus so that two or more laminated parts may be provided and these can be alternately arranged immediately after the punched part. As a result, the efficiency can be further increased.
[0030]
【Example】
[Example 1]
FIG. 1 shows an embodiment of the present invention, in which a magnetic steel sheet 1 is punched into a unit core shape of a motor core, a thermosetting adhesive is applied to the punched steel sheet surface, and then laminated and heated and pressed to be fixed. FIG.
In the figure, 1 is a magnetic steel sheet (supply member), 2 is a male die for inner peripheral punching when a unit iron core is punched from the supply member 1, and 4 is a female die for inner peripheral punching provided opposite to the mold 2. It is a type. Reference numeral 6 denotes a male die for punching the outer periphery of the unit iron core, which also serves as a pressure punch. 10 is a female die for outer peripheral punching provided opposite to the pressure punch 6 also serving as a male die, and these die form a two-stage punched portion.
[0031]
The adhesive supply device includes a male mold 3, a female mold 5, an adhesive supply tank 14, and an adhesive supply pipe 13 that are adhesive application molds. With these, the thermosetting adhesive is applied to the steel sheet surface. For example, it is dropped on the steel plate surface of the motor core corresponding to the bonding position as shown in FIG.
11 is a mold base, 12 is a heating device cradle, 9 is a heating device, 8 is a laminated iron core, 7 is a pressure punch cradle, and 15 is a fixed laminated iron core cradle. The laminated portion is configured together with the pressure punch 6 serving as a mold.
[0032]
The electromagnetic steel sheet 1 in a coiled state is continuously fed into the apparatus of the present invention by a feeding device as a supply member. After the inner peripheral side is punched by the male die 2 and the female die 4 of the punching die, the thermosetting adhesive is applied to the steel sheet surface by the male die 3 and the female die 5 of the adhesive application die. The thermosetting adhesive is supplied from the adhesive supply tank 14 through the supply pipe 13 to the male mold 3 of the adhesive application mold.
Next, in a state where an adhesive is applied to the surface portion of the steel sheet serving as the unit iron core, it is sent to the outer peripheral punching die / pressure punch 6 according to the feeding of the electromagnetic steel sheet 1. The punch is punched by the outer punching die combined pressure punch 6 and the outer punching die female die 10 and is laminated on the laminated iron core pedestal 7 inside the laminating apparatus.
[0033]
The laminated iron core 8 is heated from the side by the heating device 9 and is heated to a temperature of 150 ° C. at which the thermosetting adhesive is cured. In the separated portion 16 of the laminated iron core, the thermosetting adhesive is not applied because the male mold 3 of the adhesive application mold is intermittently operated. When the pressure punch pedestal 7 is lowered to a predetermined position, the laminated iron core 8 is sent out to the fixed laminated iron core pedestal 15.
[0034]
[Example 2]
FIG. 2 shows another embodiment of the present invention, in which a magnetic steel sheet 17 is punched into a unit iron core shape in a unit iron core shape of a motor core, the punched unit iron cores are laminated, and then thermosetting adhesion is performed from the end face. Cross-sectional explanatory drawing of the state which apply | coated the agent and heat-presses and adheres is shown.
[0035]
In the figure, 17 is an electromagnetic steel sheet (supply member), 18 is a male guide hole punching die for punching a guide hole from the supply member 17, and 21 is a guide hole punching die provided facing the die 18. Female type. Reference numeral 19 denotes an inner peripheral punching die for punching a unit iron core from the supply member 17, and 21 denotes an inner peripheral punching female die provided to face the die 19. Reference numeral 20 denotes a convex-forming mold male mold for separating the laminated iron core, and reference numeral 23 denotes a convex-forming mold female mold provided facing the mold 20. The male forming mold 20 and the female forming mold 23 are intermittently operated every predetermined number of sheets.
Reference numeral 25 denotes a male die for punching the outer periphery of the unit iron core, which also serves as a pressure punch. Reference numeral 32 denotes an outer peripheral punching female die provided opposite to the male die-use pressure punch 25. A two-stage punched portion is formed with the above mold.
[0036]
The adhesive supply device is provided alongside the male metal mold pressure punch 25 and includes an adhesive supply tank 29, an adhesive supply pipe 28, and an adhesive discharge unit 27. The adhesive discharge part 27 is set at a position lower than the male die / pressure punch 25 and is set to move up and down in synchronization with the male die / pressure punch 25. With these, the thermosetting adhesive is applied to the laminated end face. The position where the adhesive is applied is applied, for example, to a portion corresponding to the bonded portion of the unit iron core shown in FIG.
Reference numeral 24 is a mold base, 35 is a laminated iron core side pressure receiving base, 31 is a heating device, 30 is a laminated iron core, and 33 is a heat insulating member. Constitute.
[0037]
The electromagnetic steel sheet 17 in a coiled state is continuously fed into the apparatus of the present invention by a feeding device as a supply member. After the guide hole is formed by the male die 18 and the female die 21 of the guide hole punching die, the inner peripheral side is punched by the male die 19 and the female die 22 of the inner punching die. At this time, a predetermined position of the supply member is punched out so that the adhesive discharge portion that adheres the end surface of the outer peripheral portion can pass therethrough. The male mold 20 and the female mold 23 of the projection forming mold for separating the laminated iron cores are intermittently operated every predetermined number of sheets. The thermosetting adhesive is supplied from the adhesive supply tank 29 to the adhesive discharge unit 27 through the supply pipe 28.
[0038]
The unit iron core cut off from the supply member 17 by the outer punching die / compression punch 25 is laminated inside the outer punching die female die 32. The adhesive discharge unit 27 is installed at a position lower than the outer peripheral punching die / compression pressure punch 25, and when the outer peripheral side is punched, the adhesive discharge unit 27 descends in synchronization with the outer punching die / compression punch 25, and is laminated. A thermosetting adhesive is applied from both the outer peripheral side and inner peripheral side end surfaces of the iron core 30. The laminated iron core 30 is heated from the side by the heating device 31 and is heated to a temperature of 150 ° C. at which the thermosetting adhesive is cured. When the laminated iron core 30 is lowered to a predetermined position below the pressure punch side pressure receiving base 35, it is sent out from the apparatus.
[0039]
【The invention's effect】
According to the present invention, it is possible to continuously fix the iron core in the punching process of the laminated iron core using an adhesive and not the fixing using the conventional impregnation equipment. The core can be fixed, and the workability of the fixing process of the laminated iron core is greatly improved.
In addition, since the steel plate is kept in a horizontal state when the adhesive is applied, it is possible to prevent the adhesive from flowing out and to firmly fix the steel plate.
[Brief description of the drawings]
FIG. 1 shows a state in which a hoop-shaped non-oriented electrical steel sheet is punched into a unit iron core shape, an adhesive is applied to the steel sheet surface for each unit iron core, and pressure is heated in a laminated portion to fix it. Show.
FIG. 2 shows a state in which a hoop-shaped non-oriented electrical steel sheet is punched into a unit iron core shape, adhesive is applied to the teeth part and the core back part while being laminated at the laminated part, and is fixed by heating under pressure. Indicates.
FIG. 3 shows a unit iron core in a state where an adhesive is applied to the E core of the EI core. The shaded area is where the adhesive is applied. The state which applied the adhesive agent 5 places on the surface of a steel plate is shown.
4 is a unit iron core in a state where an adhesive is applied using the apparatus of FIG. The shaded area is where the adhesive is applied. The state which applied the adhesive agent from the tooth part and the end surface part of four core back outer peripheral parts is shown.
FIG. 5 is a unit iron core in a state where an adhesive is applied to the E core of the EI core using a conventional technique. A shaded portion indicates a portion where an adhesive is applied.
FIG. 6 shows a unit iron core in a state where an adhesive is applied using a conventional technique. A shaded portion indicates a portion where an adhesive is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,17: Hoop-shaped magnetic steel sheet 2,19: Male die of inner periphery punching die 3: Male die of adhesive coating die 4,22: Female die of inner periphery punching die 5: Adhesive supply die Female punch 6, 25: pressure punch for outer peripheral punching die 7: pressure punch receiving base 8, 30: laminated iron core 9, 31: heating device 10, 32: female die 11, 24 for outer peripheral punching die : Mold base 12: Heating device cradle 13: Adhesive supply pipe 14: Adhesive supply tank 15: Adhered laminated iron core cradle 16, 34: Separation part 18 of each laminated iron core 18: Guide hole punching Die male mold 20: Male mold of convex part forming mold for separating laminated iron core 21: Female mold for punching mold for guide hole punching 23: Female mold of convex part forming mold for separating laminated iron core 26: Spring for pressure punch 27: Adhesive discharge part 28: Adhesive supply pipe 29: Adhesive supply tank 33: Thermal insulation member 35: Product Iron core lateral pressure cradle 36: separated laminated iron core

Claims (8)

With one mold base, the magnetic steel sheet is punched on the inner peripheral side, and then the outer peripheral side is punched into unit iron cores of a predetermined shape. The unit iron cores are laminated and fixed to form a laminated iron core. In the manufacturing method of the laminated iron core to be integrated, after punching the inner peripheral side of the unit iron core, the portion that becomes the unit iron core during the punching of the outer peripheral side of the unit iron core (including when punching the outer peripheral side) A method for producing a laminated iron core, characterized in that an adhesive supplied from an adhesive coating male mold that intermittently operates on a partial surface is applied on the mold base.   2. The method for producing a laminated iron core according to claim 1, wherein when the laminated iron core is fixed by the mold base, pressure is applied to the laminated iron core. A unit formed by punching the outer peripheral side after punching the outer peripheral side after punching the inner peripheral side of the magnetic steel sheet and applying the thermosetting adhesive to each part that becomes a unit iron core of a predetermined shape, and punching the outer peripheral side. The laminated iron core according to claim 1 or 2, wherein the iron core is laminated on the mold base, and the laminated iron core is integrated by heating and pressurizing the laminated iron core to a predetermined temperature. Method. The method for producing a laminated iron core according to any one of claims 1 to 3, wherein a side pressure is applied to the iron core from a direction perpendicular to the laminating direction when the unit iron cores are laminated. Comprising an inner circumferential punching portion and the outer peripheral punching unit and a single mold table male punching die and the female punching molds, the unit iron core lamination unit for laminating the punched unit iron core Provided in the mold base, and provided with an adhesive supply part for applying an adhesive to a partial surface of each part serving as a unit iron core, between the inner peripheral punching part and the outer peripheral punching part or in the outer peripheral punching part An apparatus for producing a laminated iron core, wherein the laminated unit iron cores are integrated by using a pressing punch for laminating the unit iron cores on the outer die punching die of the outer peripheral punching portion. . 6. The laminated iron core manufacturing apparatus according to claim 5, wherein the unit iron core laminated portion is provided with a pressure mechanism. The apparatus for producing a laminated iron core according to claim 5 or 6 , wherein the unit iron core laminated part is provided with a pressurizing and heating mechanism. The apparatus for producing a laminated iron core according to any one of claims 5 to 7, further comprising a damper mechanism that applies a side pressure to the iron core laminated on the unit iron core laminated portion.

Images