KR20180021626A - Apparatus and Method for Manufacturing Laminated Core with Rotational Lamination and Heating Adhesion - Google Patents

Abstract

According to the present invention, a method for manufacturing a laminated core with rotational lamination and heating adhesion capable of automatically separating a laminated core comprises: a piercing process of forming a shape of a slot unit, a tooth, a shaft hole, etc. on a strip; a blanking process of forming a laminar member by punching the strip after the piercing step; and a laminating process of laminating a plurality of laminar members. In the laminating process, the laminar member laminated in the laminating process is simultaneously heated and laminated while rotating by a predetermined pitch whenever one laminar member is laminated, and upper and lower protrusions for separation are formed and laminated in a laminar member laminated after a predetermined number of laminations.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated core,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a core manufactured by laminating a laminar member. More specifically, the present invention relates to a method for manufacturing a laminated sheet by heating a laminated member punched out from a press in a lamination process so that the laminated members are adhered to each other, and at the same time, the laminated member is laminated while being rotated at a constant pitch, The present invention relates to a device for manufacturing a heated adhesive rotary laminated core capable of automatically separating a core product.

Generally, a laminated core obtained by laminating lamination members obtained through a stamping and blanking process is used as a stator or rotor of a motor or a generator, and a method of manufacturing the laminated core is well known in the art.

A punching process and a blanking process of a slot portion and a tooth are successively performed on a strip supplied to a progressive mold apparatus to continuously form a lamina member of a single sheet and finally a lamina member sheet Are stacked at a predetermined number of times to join together the lamina members, thereby manufacturing a motor laminated core. As described in Korean Patent Laid-Open Publication No. 10-2005-0026882, for example, embossing is performed on each lamina member, and the embossing lamination method Are typically known.

In this embossing laminated motor core, since the shape of male and female protrusions formed on the base material is fastened in a forced fit manner, the steel core acts like a speed restricting jaw installed on the road, resulting in loss of iron loss and magnetic flux density. In addition, there is a problem that the drop rate is lowered and vibration noise occurs due to the resonance phenomenon.

In order to solve such a problem, a method of attaching lamina members to each other using an adhesive or an adhesive film has been proposed. Such prior arts include Korean Patents 10-1627471, 10-1618708, 10-1616987 and 10-1618709. In these prior arts, the squeeze ring in which the lamina member is laminated is heated to thermally cure the adhesive or the adhesive film applied to the lamina member to assure the mutual connection of the lamina members.

However, in general, when manufacturing a laminated core, the shape of the core sheet punched out by blanking is not always accurately maintained and a certain deviation occurs. Therefore, when the core sheet is repeatedly laminated several times, the concentricity and the perpendicularity are not constant due to the cumulative deviation in the finished core, which causes a product failure.

On the other hand, the prior art discloses a technique for heating a squeeze ring to directly heat a core product stacked in a squeeze ring. However, in the case of heating the squeeze ring, the adhesive or the adhesive film on the outer diameter side of the core can be sufficiently cured by heat, but since the inner diameter side portion of the squeeze ring is heated by the thermal conductivity of the core itself, sufficient thermal curing It is not easy. This can not provide a sufficient adhesive force between laminated lamina members, and thus causes a problem of quality defects such as a laminated portion on the inner diameter side of the core being widened.

The present inventor has proposed a heating and adhesive laminated rotary laminated core manufacturing apparatus capable of stacking laminar members while rotating the squeeze ring by a predetermined pitch and directly heating the inner diameter side of the laminated core I want to.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for manufacturing a heated adhesive rotary laminated core wherein a squeeze ring can be stacked while a sheet of a laminated core is heated by a predetermined pitch while being heated.

Another object of the present invention is to provide an apparatus for manufacturing a heat-bonding type rotating laminated core capable of directly heating an inner diameter side of a laminated core.

The above and other objects of the present invention can be easily achieved by the present invention described below.

A method of manufacturing a heat-bonded rotary laminated core capable of automatically separating a laminated core according to the present invention comprises:

A piercing step of forming a shape of a slot, a tooth, a shaft hole, or the like on the strip;

A blanking step of punching the strip after the piercing step to form a lamina member; And

And a lamination step of laminating a plurality of lamina members,

In the laminating step, the laminating member stacked in the laminating step is heated and laminated while rotating by a predetermined pitch every time one laminating member is laminated,

And the laminar member, which is laminated after the laminar members are stacked at a predetermined number, is formed with stacking upward protrusions and separating downward protrusions.

The present invention relates to a punching process and a blanking process for a strip 100A which is composed of an upper mold 3 and a lower mold 4 and in which a punch mounted on the upper mold 4 is sequentially conveyed from above the lower mold 4 In which a lamina member (101) is formed and laminated,

A squeeze ring 201 installed at a lower portion of the blanking die 11 for the blanking process;

Heating means 202 provided outside the squeeze ring 201;

A rotary die 203 provided with the squeeze ring 201 and the heating means 202 and rotating together with the squeeze ring 201 and the heating means 202 by a predetermined pitch;

A vertically moving die 32 provided at one side of the blanking die 11 and having a plurality of protrusions 32 'and a recessed portion 32A; And

A fixing die 31 provided on the upper mold 3 on the upper side of the up-and-down moving die 31 and formed with a plurality of recessed portions 31 'and protruding portions 31A;

And a laminated core including the laminated core and the laminated core.

In the present invention, it further includes a ring-shaped rotary electrode 205 provided outside the rotary die 203,

The rotary electrode 205 is electrically connected to the heating means 202. When the rotary electrode 205 and the fixed electrode 206 provided outside the rotary electrode are electrically connected to each other, 202 may be supplied with electricity.

In the present invention, it is preferable that a heat dissipation pad 208 for blocking heat generated by the heating means 202 is installed under the blanking die 11.

In the present invention, it is preferable that the laminated core is supported by the inner diameter heating apparatus 300 located under the rotary die 203 and taken out to the outside.

In the present invention, a rotation drive member 207 provided on the outer peripheral surface of the rotary die 203 may be further included.

(1) The laminated core can be laminated while being heated by a predetermined pitch, thereby eliminating the lamination deviation of the laminated core, securing a good squareness and good concentricity, and (2) (3) The invention provides an apparatus for producing a heat-bonding type rotating laminated core capable of directly heating the inner surface side of the laminated core to ensure good quality of the laminated core Effect.

1 is a cross-sectional view showing an example of a strip for manufacturing a lamina member to which the present invention is applied.
2 is a perspective view showing a lamina member applied to the present invention.
3 is a perspective view of a laminated core manufactured by laminating a lamina member applied to the present invention.
4 is a cross-sectional view showing a device for manufacturing a heat-bonding type rotating laminated core capable of automatically separating a laminated core according to the present invention.
5 is a cross-sectional view showing a laminating apparatus and an inner diameter heating apparatus of an apparatus for manufacturing a heated adhesive rotary laminated core capable of automatically separating a laminated core according to the present invention.
6 is a cross-sectional view showing an example of the operation of a laminating apparatus and an inner diameter heating apparatus of a device for manufacturing a heated bonded rotary laminated core capable of automatically separating a laminated core according to the present invention.
7 is a conceptual diagram for explaining a process of automatically separating a laminated core product in a laminated core production apparatus according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an example of a strip 100A for manufacturing a lamina member 101 applied to the present invention.

1, a strip 100A applied to the present invention is formed by depositing a synthetic resin adhesive film 100A 'on the surface of a strip-shaped steel sheet 100-1 made of a thin plate or applying a synthetic resin coating layer for adhesion . In the present invention, it is preferable to use this type of strip 100A, but it is not necessarily limited to such a strip 100A. For example, a synthetic resin adhesive film 100A 'may be formed only on one side of the steel sheet 100-1, and an adhesive agent other than the adhesive film 100A' may be applied on the surface of the steel sheet 100-1 It is also acceptable to apply the form. Such an adhesive is applied to the surface of the steel sheet 100-1 in a state where the adhesive is not applied in the manufacturing apparatus 1 of the laminated core, during the piercing, blanking or laminating process, It can also be applied in form. Hereinafter, a steel strip 100-1 with an adhesive film 100A 'for convenience will be described as an example of the strip 100A.

FIG. 2 is a perspective view showing a lamina member 101 applied to the present invention, and FIG. 3 is a perspective view of a laminated core 100 manufactured by stacking lamina members 101 applied to the present invention.

Referring to FIG. 2, a lamina member 101 is shown, which is a sheet of laminated cores produced by punching and blanking the strip 100A by a device 1 described below. A laminated core 100 manufactured by laminating the laminar members 101 a predetermined number of times is shown in Fig.

The laminated core 100 is formed in such a state that the synthetic resin film 100A 'deposited on the surface of the lamina member 101 or the adhesive is hardened by heat and adhered to the back surface of the lamina member 101. [

4 is a cross-sectional view showing an apparatus 1 for manufacturing a heated adhesive rotary laminated core according to the present invention.

The synthetic resin adhesive film 100A 'supplied to the apparatus 1 shown in FIG. 4 is applied to the strip 100A in which the synthetic resin for vapor deposition or adhesion is coated, A lamination member 101 of a single piece is successively formed so that the lamination core 101 and the lamination member 101 are successively formed and then a lamination of a predetermined number of laminated members 101 finally punched out is performed to thermally cure the lamination core 100 ).

More specifically, referring to FIG. 4, the apparatus for producing a laminated core according to the present invention is characterized in that a sequentially moving synthetic resin adhesive film 100A 'is subjected to a continuous operation on a strip 100A coated with synthetic resin for vapor deposition or adhesion A press working method is applied. That is, the apparatus 1 according to the present invention is preferably a progressive mold apparatus and comprises an upper mold 3 and a lower mold 4.

The upper mold 3 is disposed on the upper side of the lower mold 4 and moves in the direction of the lift v toward the lower mold 4. [ The movement of the upper mold 3 is carried out as the upper mold 3 is mounted on the press machine and the press is driven. At the upper portion of the lower mold 4, the strip 100A moves along the advancing direction f.

The upper mold 3 includes piercing punches 5, 6, 7 and 8 and blanking punches 9 for punching the strips 100A, a punch plate 17 for mounting the punches, And a punch holder 19 for supporting the punch holder 19 from above. 4, four piercing punches 5, 6, 7 and 8 are shown. However, the number and shape of the piercing punches may vary depending on the shape and size of the core to be manufactured, Of course, punching and blanking of the strip 100A are performed in the order of the control program mounted on the microprocessor (not shown).

The upper mold 3 is provided with a punch backing plate 18 for supporting the punch between the punch holder 19 and the punch plate 17 and a punch backing plate 18 for guiding the punch to move to the correct position, The stripper plate 20 may be provided to remove the strips 100A.

The lower mold 4 includes a die holder 16 mounted on the press machine and holding the entire center of the lower mold 4, a die plate 13 seated on the upper side of the die holder 16, And a die backing plate 15 positioned between the die plate 13 and the die plate 13 to support the pressure applied to the die plate 13.

Further, in the lower mold 4, a cylindrical blanking die 11 having a hollow formed at a position corresponding to the blanking punch 9 is mounted. The blanking die 11 is pushed by the blanking punch 9 to discharge the lamina member 101 which is a core sheet separated from the strip 100A to the lower side and the discharged lamina member 101 is conveyed to the blanking die 11 and the squeeze ring 14 provided at the lower part of the laminate member 101. The laminar members 101 are heated at the same time to be bonded to each other by thermal curing of the adhesive film.

The lamina member 101 punched out from the blanking die 11 is pressed into the squeeze ring 201 of the laminating apparatus 200 under the blanking die 11 and the other lamina members 101 are sequentially And is pushed down to the lower part of the squeeze ring 201 while being stacked. The core in which the predetermined number of sheets are laminated becomes one product and is taken out from the bottom of the squeeze ring 201 to the outside.

The laminated core manufacturing process using the apparatus 1 for producing a laminated core according to the present invention may be applied to a piercing process, a separating protrusion forming process for separating the laminated core, a blanking process and a laminating process .

In the piercing step, a basic shape such as a slot portion 101 ', a tooth 101', a shaft hole and the like excluding the core outer shape is formed on the strip 100A. At this time, The piercing punches 5, 6, 7 and 8, which are mounted on the upper mold 3 and move in the up and down direction, are pierced while being shifted one pitch at a time.

When the piercing process is completed, a lamination core separating protrusion forming process for separating and discharging a predetermined number of stacked cores 100 and a predetermined number of stacked cores 100 to be described later may be performed. In the blanking process, a strip 100A is formed to form a lamina member 101, and the formed lamina member 101 is sequentially stacked in a lamination process. The lamination step is preferably a step in which a laminating member laminated for thermal curing of an adhesive film or an adhesive together with the lamination is combined together. Further, the squeeze ring 201 is stacked while being rotated by a predetermined pitch every time one lamina member is stacked with heating. The configuration for this will be described with reference to FIG. 5 and FIG. 6 below.

5 is a cross-sectional view showing a laminating apparatus 200 and an inner diameter heating apparatus 300 of the apparatus 1 for manufacturing a hot-pressed rotating laminated core according to the present invention, and Fig. 6 is a cross- Sectional view showing an example of the operation of the laminating apparatus and the inner diameter heating apparatus.

5, the laminating apparatus 200 of the laminated core producing apparatus 1 according to the present invention comprises a squeeze ring 201, a heating means 202, a rotating die (not shown) provided at the bottom of the blanking die 11, 203, a rotating electrode 205, a fixed electrode 206, and a rotation driving member 207.

The squeeze ring 201 is a portion where the laminar member 101 formed in the blanking process is stacked and a plurality of laminar members 101 are stacked so that the laminar member 101 on the upper side pushes the lower laminar member The laminated core is moved downward. The squeeze ring 201 is heated by the heating means 202 provided on the outer peripheral surface of the squeeze ring 201. [ The squeeze ring 201 is heated to maintain a predetermined temperature required for curing. The heated squeeze ring 201 heats the laminated lamina member 101 and the adhesive film or adhesive on the surface thereof is thermally cured, So that adhesion between the members (101) can be performed well. The heating means 202 is preferably a PTC ceramic heater, but is not necessarily limited thereto. The position where the heating means 202 is installed is also preferably the outer circumferential surface of the squeeze ring 201, but it is not necessarily limited thereto, and it may be located inside the squeeze ring 201 or at other positions.

The squeeze ring 201 and the heating means 202 are provided inside the rotary die 203 so that when the rotary die 203 is rotated by a predetermined pitch, ). A plurality of bearings (not shown) may be applied at required positions for rotation of the rotary die 203.

The heating means 202 of the rotary die 203 must be heated while rotating and a rotary electrode 205 electrically connected to the heating means 202 is provided on the outer peripheral surface of the rotary die 203 for heating the heating means 202 Respectively. The rotating electrode 205 is a continuous ring electrode and is electrically connected to the fixed electrode 206 which rotates together with the rotating die 203 and is located separately on the outer side of the rotating die 203. That is, the fixed electrode 206 always maintains an electrical connection with the rotating electrode 205 even when the rotating die 203 is rotated, so that even when the rotating die 203 is rotating, the heating means 202 is electrically To be heated.

On the outer circumferential surface of the rotary die 203, a rotation drive member 207 is provided. The rotation driving member 207 is a member capable of transmitting driving force of various types of driving means, that is, a motor or the like, to the rotating die 203 that can rotate the rotating die 203. For example, gears, pulleys and the like can be applied. 5 is a pulley and connects a drive belt (not shown) connected to a drive shaft of a separately installed motor (not shown) to the rotation drive member 207 to rotate the rotation drive member 207, So that the rotary die 203 is rotated. It is preferable that the rotation of the rotary die 203 is made by a predetermined constant pitch. For example, when one pitch is set to 60 degrees, one lamina member is blanked, and the lamina member laminated thereon is laminated while being rotated by 60 degrees. As this is repeated, laminated cores can be manufactured while laminating members continuously rotated by 60 degrees.

A heat radiation pad 208 may be provided under the blanking die 11 or the like in order to prevent the heat generated by the heating means 202 from being conducted to the blanking die 11 or the die plate 13 or the like.

The laminating apparatus 200 configured as described above allows simultaneous heating and rotation by a predetermined pitch while laminating the laminar members.

On the other hand, the inner circumferential surface of the laminated core 100 has a delicate structure as compared with the outer circumferential surface of the laminated core 100 like the teeth 101 ". Therefore, if the lamination members are not secured to each other, ") Of the laminated core 100 may be caused to occur. Therefore, it may be required to directly heat the inner circumferential surface of the laminated core 100. To this end, the manufacturing apparatus 1 of the present invention may further include an inner diameter heating apparatus 300 at a lower portion of the laminating apparatus 200.

The inner diameter heating apparatus 300 of the present invention includes a lift block 301, an elevation means 302, a support pad 303, and a heating block 304.

The elevating block 301 is operated to move up and down by the operation of the elevating means 302. The elevating means 302 may apply various known technical means to move the elevating block 301 such as a motor or a pneumatic cylinder up and down. The elevating block 301 is vertically movable toward the inner diameter side of the rotary die 203 by the elevating means 302.

The support pad 303 is installed so as to be freely rotatable with respect to a rotation axis provided at the center thereof. A bearing (not shown) may be provided on the upper portion of the lift block 301 to support this rotation. The support pad 303 may be omitted if rotation is not required.

The heating block 304 is heated by electric power supplied from the outside and positioned on the inner surface of the laminated core 100 to heat the inner surface of the laminated core 100. The outer diameter of the heating block 304 is set to be equal to or slightly smaller than the inner diameter of the laminated core 100 so that the heating block 304 is positioned closely to the inner diameter surface of the laminated core 100, . The height of the heating block 304 is set to be equal to or slightly greater than the height of one laminated core 100. [ By doing so, the inner surface of the laminated core 100 can be heated more effectively.

6, the lifting block 301 is raised by the operation of the lifting means 302 and is located on the lower side of the squeeze ring 201. As shown in Fig. A heating block 304 is positioned on the inner diameter surface of the laminated core 100 stacked in the squeeze ring 201 to heat the inner diameter side of the laminated core 100 and at the same time the laminar member 101 is laminated from above, When the core 100 is pushed down and one laminated core 100 is separated, the lifting block 301 is lowered as shown in FIG. 5, and the laminated core 100 is completed and taken out to the outside.

The support pad 303 may be configured to rotate together with the squeeze ring 201, but it is not necessarily required to rotate 360 degrees like the squeeze ring 201. This is because the support pad 303 can be moved up and down at any time by the lifting means 301 and the inner diameter can be heated even after the laminated core 100 has been removed from the squeeze ring 201.

A heat radiating pad 306 may be further provided under the heating block 304 to prevent heat generated in the heating block 304 from being conducted to the lifting block 301 or the like.

It is preferable that a process of forming a separating protrusion of a laminated core be added between the piercing process and the blanking process, which will be described with reference to FIG. 4 again.

Referring again to FIG. 4, a protrusion forming device for separating a laminated core, which is provided in the upper and lower molds 3 and 4 between the piercing and blanking processes for performing a separation protrusion forming process for separating the laminated cores from each other, (30) is provided with a fixing die (31) having a recessed portion (31 ') and a protruding portion (31A) in the upper mold (3), and a protruding portion (32' And a vertically moving die 32 having an inlet 32A. The laminated core separating protrusion forming apparatus 30 according to the above construction has a plurality of separating upward protrusions 100-2 and separating downward protrusions 100-2 ' The upper and lower moving dies 32 are lifted and lowered via an actuator 40A such as a hydraulic cylinder and the upper and lower moving dies 32 are lifted and lowered to the strips 100A by the separating upward protrusions 100-2, The downward protrusion 100-2 'may be formed so that the laminated core 100 and the laminated core 100 are automatically separated as described later. Meanwhile, the separation protrusions 100-2 and 100-2 'can be formed by the operation of the upper mold 3 and the lower mold 4 without the actuator 40A being operated. Alternatively, the fixing die 31 may be moved up and down while the up-and-down moving die 32 is fixed. Therefore, the fixed die 31 and the up-and-down moving die 32 may be configured so as to be in contradiction with their names, despite their names. Furthermore, the number of protrusions and recesses can be variously changed as shown in Fig.

The protrusion forming process for separating the laminated core between the piercing and blanking processes by the protrusion forming apparatus for separating the laminated core 30 and the laminated core separating process will be described in detail with reference to FIG.

7 is a conceptual diagram for explaining a process of automatically separating a laminated core product in a laminated core production apparatus according to the present invention.

When a laminated core 100 in which 15 sheets are stacked by a driving program installed in a control device 40 for controlling a laminated core manufacturing apparatus according to the present invention is manufactured, the 16th strip 100A ( The upper and lower moving dies (not shown) having the fixing die 31 and the protruding portion 32 'and the concave portion 32A having the concave portions 31' and the protruding portions 31A after the piercing process, A plurality of separating upward protrusions 100-2 and separating downward protrusions 100-2 'are formed on the strips 100A for conveying and mutually interlocking the plurality of separating protrusions 100-2 (step (b) of FIG. 7) A blanking process is performed (step (c) of FIG. 7) in which the outer laminar member 101A for separation is obtained by stamping the outer shape of the core from the strips 100A protruding from the projections 100-2 and 100-2 '.

Fifteen lamina members 101 without punched laminated protrusions 100-2 and 100-2 'are already laminated through a repetitive blanking process to form a laminated core. In the upper part of the 15 laminated cores, A laminating member for separation having the protrusions 100-2 and 100-2 'formed in the step (c) is laminated (step (d) of FIG. 7).

Next, a lamina member 101 having no protrusion 100-2 is successively further stacked on the upper portion of the separating laminar member 101A (step (e) of Fig. 7). The laminating member 101A for separation is subjected to pressure from the upper and lower laminar members by the pressing force while the laminar member 101 is continuously laminated on the upper portion thereof. By this pressure, the shape of the separating upward projection 100-2 is deformed similarly to the downward fold, and the shape of the separating downward projection 100-2 'is deformed similarly to the upward fold. By this modification, the separating laminar member 101A having the projections 100-2 and 100-2 'is automatically separated without being adhered to the upper and lower laminar members (step (f )). An individual laminated core having fifteen pieces that pass through the squeeze ring 14 through such steps can be obtained as a final product.

That is, when the laminated core 100 laminated inside the squeeze ring 201 is heated in the laminating apparatus 200, the respective synthetic resin adhesive films 100A 'are melted and the upper and lower surfaces of the respective lamina members 101 And adheres to the metal surface. On the upper surface of the separating laminar member 101A located on the top of the first 15 laminated cores 100, the lamina member 101 at the bottom, which is the other 15 laminated cores 100, The separating protrusions 100-2 and 100-2 'are deformed and are in contact with the upper and lower cores. However, when the separating protrusions 100-2 and 100-2' are in contact with the upper and lower cores, -2 ') without being adhered to each other. Therefore, the laminated core 100 to which 15 sheets are bonded from the squeeze ring 201 is discharged one by one.

It should be noted that the above description of the present invention is merely illustrative and not for the purpose of defining the scope of the present invention in order to understand the present invention. It is intended that the scope of the invention be defined by the claims appended hereto, and that all such modifications and variations are intended to be included within the scope of the present invention.

1: mold device 3: upper mold
4: lower mold 5, 6, 7, 8: piercing punch
9: blanking punch 12: blanking die
13: Die plate 15: Die backing plate
16: die holder 17: punch plate
18: Punch backing plate 19: Punch holder
20: stripper plate 30: separation protrusion forming device
31: Fixing die 32: Up-and-down moving die
100: laminated core 100A: strip
100A ': synthetic resin adhesive film 100: laminated core
101: Lamina member 200: Lamination device
201: squeeze ring 202: heating means
203: rotating die 205: rotating electrode
206: fixed electrode 207: rotation driving member
208, 306: heat radiation pad 300: inner diameter heating device
301: elevating block 302: elevating means
303: support pad 304: heating block

Claims (5)

A piercing step of forming a shape of a slot, a tooth, a shaft hole, or the like on the strip;
A blanking step of punching the strip after the piercing step to form a lamina member; And
A lamination step of laminating a plurality of lamina members;
Lt; / RTI >
In the laminating step, the laminating member stacked in the laminating step is heated and laminated while rotating by a predetermined pitch every time one laminating member is laminated,
Wherein the laminar member is laminated after a predetermined number of the laminar members are stacked, and a laminar member for separation is formed and stacked on the laminar member for separation. Way. A strip 100A consisting of an upper mold 3 and a lower mold 4 and in which a punch mounted on the upper mold 4 is sequentially conveyed from above the lower mold 4 is pierced and blanked, In the apparatus for producing a laminated core in which a sheet of the member (101) is formed and laminated,
A squeeze ring 201 installed at a lower portion of the blanking die 11 for the blanking process;
Heating means 202 provided outside the squeeze ring 201;
A rotary die 203 provided with the squeeze ring 201 and the heating means 202 and rotating together with the squeeze ring 201 and the heating means 202 by a predetermined pitch;
A vertically moving die 32 provided at one side of the blanking die 11 and having a plurality of projections 32 'and a recessed portion 32A; And
A fixing die 31 provided on the upper mold 3 on the upper side of the up-and-down moving die 31 and formed with a plurality of recessed portions 31 'and protruding portions 31A;
Wherein the laminated core includes a plurality of laminated cores, and the plurality of laminated cores are separated from each other. The rotary encoder according to claim 2, further comprising a ring-shaped rotary electrode (205) provided outside the rotary die (203)
The rotary electrode 205 is electrically connected to the heating means 202. When the rotary electrode 205 and the fixed electrode 206 provided outside the rotary electrode are electrically connected to each other, 202) of the laminated core is capable of being automatically separated.
3. The laminated core according to claim 2, wherein a heat dissipation pad (208) for blocking heat generated by the heating means (202) is provided under the blanking die (11) Rotating laminated core. 5. The laminated core according to claim 4, wherein the laminated core is supported by the inner diameter heating device (300) located below the rotary die (203) Rotating laminated core.

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