Manufacturing device of laminated core and manufacturing method of laminated core

Abstract

The present application provides a kind of laminated core manufacturing device and laminated core manufacturing method.The laminated core manufacturing device (10) has: lower die (20), with the die (23) formed with die hole (26);Upper die (40), with punch (45);Demolding plate (60), when using punch (45) to punch out strip-shaped metal plate (W), at the most lower position (LP) limit metal plate (W) moves in up-down direction;Adhesive coating device (70) is set to lower die (20), and adhesive is coated to the lower surface (WL) of metal plate (W);And control device (90), demolding plate (60) and adhesive coating device (70) are controlled, control device (90) has: movement control part (92), the up-down direction movement of demolding plate (60) is controlled;And coating control part (94), when demolding plate (60) is not located at the most lower position (LP), make adhesive from adhesive coating device (70) to the lower surface (WL) of metal plate (W) coating.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority based on Japanese Patent Application No. 2023-23208 filed on February 17, 2023, the entire contents of which are incorporated into the present specification by reference. TECHNICAL FIELD

[0003] The present application relates to a manufacturing apparatus of a laminated core and a manufacturing method of a laminated core. BACKGROUND

[0004] A laminated core used for a motor or the like is formed by punching a band-shaped metal plate (for example, a band-shaped steel plate) into a prescribed shape to form a core member (core), and integrating the formed core members by laminating them. For example, the core members are integrated by laminating them by riveting, welding, or adhesion, and the like, thereby forming a laminated core. For example, a manufacturing apparatus of a laminated core in which a plurality of core members are laminated and adhered to each other using an adhesive is disclosed in Japanese Patent No. 6843887. In Japanese Patent No. 6843887, an adhesive applying device is provided to a lower side holder having a punch, and when a band-shaped metal plate is pressed against the upper surface of the punch by a stripper plate, the adhesive ejected from the ejection hole of the adhesive applying device is transferred to the band-shaped metal plate.

[0005] However, in the apparatus of Japanese Patent No. 6843887, since the adhesive is transferred to the band-shaped metal plate by bringing the band-shaped metal plate into contact with the adhesive that is bulged from the ejection hole, when the stripper plate is moved downward, the interval between the band-shaped metal plate and the ejection hole must be strictly managed. In addition, since the band-shaped metal plate is brought into contact with the adhesive, the interval between the ejection hole and the band-shaped metal plate becomes very narrow, and it is difficult to apply the adhesive to a wide range of the band-shaped metal plate. Therefore, there is a possibility that the adhesion between the core members becomes weak, and the rigidity of the laminated core decreases.

[0006] The present application has been made in view of the above problems, and an object thereof is to provide a manufacturing apparatus and a manufacturing method of a laminated core capable of manufacturing a laminated core having high rigidity. SUMMARY

[0007] The present application relates to a manufacturing apparatus of a laminated core in which a plurality of core members are laminated and bonded to each other, the manufacturing apparatus including: a lower die having a punch having a punch hole; an upper die having a punch corresponding to the punch hole; a stripper plate provided to the upper die and movable downward to a lowermost position as a lowermost position, and configured to restrict movement of a metal strip in a vertical direction at the lowermost position when the metal strip is punched by the punch; an adhesive applying device provided to the lower die and configured to apply an adhesive to a lower surface of the metal strip; and a control device configured to control the stripper plate and the adhesive applying device, the control device including: a movement control portion configured to control movement of the stripper plate in the vertical direction; and an application control portion configured to cause the adhesive to be applied from the adhesive applying device to the lower surface of the metal strip when the stripper plate is not positioned at the lowermost position.

[0008] According to the manufacturing apparatus of a laminated core of the present application, the application control portion of the control device causes the adhesive to be applied from the adhesive applying device to the lower surface of the metal strip when the stripper plate is not positioned at the lowermost position. According to the above-described configuration, when the adhesive is applied from the adhesive applying device to the lower surface of the metal strip, the metal strip is spaced apart from the adhesive applying device because the stripper plate is not positioned at the lowermost position. Therefore, the adhesive applied from the adhesive applying device is attached to a wide range of the lower surface of the metal strip. As a result, the bonding between the laminated core members is strengthened, and a laminated core having excellent rigidity can be manufactured.

[0009] In addition, the present application relates to a manufacturing method of a laminated core in which a plurality of core members are laminated and bonded to each other, the manufacturing method being performed by a manufacturing apparatus including: a lower die having a punch having a punch hole; an upper die having a punch corresponding to the punch hole; a stripper plate provided to the upper die and movable downward to a lowermost position as a lowermost position, and configured to restrict movement of a metal strip in a vertical direction at the lowermost position when the metal strip is punched by the punch; and an adhesive applying device configured to apply an adhesive to a lower surface of the metal strip, the manufacturing method including: an adhesive applying step of applying the adhesive from the adhesive applying device positioned below the metal strip to the lower surface of the metal strip when the stripper plate is not positioned at the lowermost position; a lowering step of moving the stripper plate to the lowermost position; and a punching step of punching the metal strip by the punch to form an outer shape of the core member when the stripper plate is positioned at the lowermost position.

[0010] According to the manufacturing method of the laminated core according to the present application, in the adhesive applying step, the adhesive is applied to the lower surface of the metal strip from the adhesive applying device while the stripper plate is not located at the most lowered position. According to the above-described manner, when the adhesive is applied to the lower surface of the metal strip, the interval between the metal strip and the adhesive applying device is wide because the stripper plate is not located at the most lowered position. Therefore, the adhesive applied from the adhesive applying device adheres to a wide range of the lower surface of the metal strip. Thus, the adhesion between the laminated core members is strengthened, and a laminated core having excellent rigidity can be manufactured.

[0011] According to the present application, a manufacturing device and a manufacturing method of a laminated core capable of manufacturing a laminated core having high rigidity can be provided.

[0012] The above and other elements, features, steps, characteristics and advantages of the present application will become more apparent from the following detailed description of the preferred embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a side view showing a manufacturing device of a laminated core according to an embodiment.

[0014] Figure 2 is a perspective view showing a laminated core according to an embodiment.

[0015] Figure 3 is a plan view showing a lower die according to an embodiment.

[0016] Figure 4 is a sectional view showing a lifting member according to an embodiment.

[0017] Figure 5 is a sectional view showing a manufacturing device of a laminated core according to an embodiment.

[0018] Figure 6A is a sectional view showing a general state of an adhesive applying device according to an embodiment.

[0019] Figure 6B is a sectional view showing a state in which an adhesive containing chamber of an adhesive applying device according to an embodiment is supplied with an adhesive.

[0020] Figure 6C is a sectional view showing a state in which an adhesive is sprayed from a nozzle of an adhesive applying device according to an embodiment.

[0021] Figure 6D is a sectional view showing a state in which an adhesive sprayed from a nozzle of an adhesive applying device according to an embodiment adheres to the lower surface of a metal strip.

[0022] Figure 7A is a sectional view showing a state in which the stripper plate according to one embodiment is in contact with the metal strip.

[0023] Figure 7B is a sectional view showing a state in which the stripper plate according to one embodiment is not in contact with the metal strip.

[0024] Figure 7C is a sectional view showing a state in which the stripper plate according to one embodiment presses the metal strip against the die plate at the most lowered position.

[0025] Figure 8 is a flowchart of a manufacturing method of the laminated core according to one embodiment.

[0026] Figure 9 is a graph showing a relationship between an angle of the upper die of the manufacturing apparatus of the laminated core and each process.

[0027] Figure 10 is a flowchart of a manufacturing method of the laminated core according to a modification.

[0028] Figure 11 is a plan view showing the lower die according to the modification. DETAILED DESCRIPTION

[0029] Hereinafter, an embodiment of a manufacturing apparatus of a laminated core according to the present application will be described with reference to the drawings. Note that the embodiment described here is of course not intended to particularly limit the present application. Also, components that serve the same function are labeled with the same reference numerals, and repeated description will be appropriately omitted or simplified.

[0030] As shown in Figure 1 , a manufacturing apparatus 10 (hereinafter referred to as manufacturing apparatus 10) of a laminated core 8 (refer to Figure 2 ) according to the present embodiment manufactures a laminated core 8 (refer to Figure 2 ) in which a plurality of core members 5 (refer to Figure 3 ) are laminated and bonded to each other. The manufacturing apparatus 10 is a progressive type press die. In the manufacturing apparatus 10, a metal strip W is intermittently conveyed with respect to a plurality of processing stages 25 (refer to Figure 5 ) described later. The metal strip W is, for example, a coil (a thin steel strip). The manufacturing apparatus 10 is provided with a lower die 20, an upper die 40, a stripper plate 60, an adhesive applicator 70 (refer to

[0031] The lower die 20 is fixed to the ground. As Figure 3As shown, the lower die 20 is provided with a plurality of processing stages 25. The processing stages 25 include an inner-punching stage 25A, an adhesive applying stage 25B, and an outer-punching stage 25C. The inner-punching stage 25A, the adhesive applying stage 25B, and the outer-punching stage 25C are arranged in this order in the feeding direction D. The inner-punching stage 25A includes the first die plate 22A, the first punch 23A, the inner-punching punch hole 26A, and the inner-punching punch 45A (see Figure 5 ) to be described later. The outer-punching stage 25C includes the second die plate 22C, the second punch 23C, the outer-punching punch hole 26C, and the outer-punching punch 45C (see Figure 5 ) to be described later. The lower die 20 has a lower die main body 21, a die plate 22, and a punch 23. The die plate 22 and the punch 23 are placed on the lower die main body 21. The die plate 22 holds the punch 23. The die plate 22 includes the first die plate 22A holding the first punch 23A to be described later and the second die plate 22C holding the second punch 23C to be described later. The punch 23 includes the first punch 23A included in the inner-punching stage 25A and the second punch 23C included in the outer-punching stage 25C. The punch holes 26 are formed in the punch 23. The inner-punching punch hole 26A is formed in the first punch 23A as the punch hole 26. The outer-punching punch hole 26C is formed in the second punch 23C as the punch hole 26. The upper surface 22T of the die plate 22 and the upper surface 23T of the punch 23 are located at the same height. More specifically, the upper surface 22T of the first die plate 22A and the upper surface 23T of the first punch 23A and the upper surface 22T of the second die plate 22C and the upper surface 23T of the second punch 23C are located at the same height. The lower die main body 21 includes the adhesive applying stage 25B. The adhesive applying punch hole 27 is formed in the lower die main body 21. In addition, in Figure 3 , the adhesive applying device 70 (see Figure 5 ) is omitted from the drawing.

[0032] The band-shaped metal plate W is intermittently fed to the lower die 20 by a feeding device (not shown) provided in the vicinity of the manufacturing device 10. The band-shaped metal plate W is intermittently fed in the order of the inner-punching stage 25A, the adhesive applying stage 25B, and the outer-punching stage 25C. The feeding device holds the band-shaped metal plate W in a wound state. The band-shaped metal plate W is fed to the lower die 20 by a winding-off device (not shown) of the feeding device, and the band-shaped metal plate W after the press working is fed from the lower die 20 by a winding-up device (not shown) of the feeding device and is wound up to the winding-up device. In addition, instead of the winding-off device and the winding-up device of the feeding device, the band-shaped metal plate W can be fed by a pair of upper and lower rotating rollers arranged on the upstream side and the downstream side of the manufacturing device 10, respectively.

[0033] As shown in Figure 3As shown, the lower die 20's punch 23 has multiple lifting members 30. The lifting members 30 apply upward force to the strip-shaped metal sheet W. As the strip-shaped metal sheet W is intermittently conveyed on the punching die 22 and the punch 23, the lifting members 30 push the strip-shaped metal sheet W upward to hold it above a predetermined distance from the upper surface 22T of the punching die 22 and the upper surface 23T of the punch 23. Figure 4 As shown, the lifting member 30 is positioned on the punching template 22 and applies force upwards to the force-applying member 32. The force-applying member 32 is, for example, a coil spring. When the ejector template 60 (see reference) Figure 1 When the ejector plate 60 moves downward and presses the strip metal sheet W downward, the lifting member 30 moves downward against the force applied by the force member 32. As a result, the strip metal sheet W is pressed by the ejector plate 60 against the upper surface 22T of the punching plate 22 of the lower die 20 (more specifically, the upper surface 22T of the first punching plate 22A and the upper surface 22T of the second punching plate 22C) and the upper surface 23T of the punch 23 (more specifically, the upper surface 23T of the first punch 23A and the upper surface 23T of the second punch 23C). On the other hand, when the ejector plate 60 moves upward and no longer applies pressure to the strip metal sheet W, the lifting member 30 moves upward due to the force applied by the force member 32. As a result, the lifting member 30 holds the strip metal sheet W above the lower die 20 (more specifically, above the upper surface 22T of the punching plate 22 and the upper surface 23T of the punch 23) by a predetermined distance. During intermittent conveying, the strip metal sheet W moves above the upper surface 30A of the lifting member 30. Furthermore, the punch 23 of the lower die 20 has a limiting member 28 that restricts the upward movement of the strip metal sheet W when it is pushed upward by the lifting member 30. The limiting member 28 restricts the distance between the strip metal sheet W and the lower die 20 (more specifically, the upper surface 22T of the punching die 22 and the upper surface 23T of the punch 23) from increasing to a predetermined level.

[0034] like Figure 5 As shown, the upper die 40 is positioned above the lower die 20. The upper die 40 is configured to approach and separate from the lower die 20. The upper die 40 has a plurality of punches 45 corresponding to the die hole 26. The punches 45 include an inner blanking punch 45A and an outer blanking punch 45C. The inner blanking punch 45A is located above the inner blanking die hole 26A. The inner blanking punch 45A is configured to be able to be inserted into the inner blanking die hole 26A. The outer blanking punch 45C is located above the outer blanking die hole 26C. The outer blanking punch 45C is configured to be able to be inserted into the outer blanking die hole 26C. In the inner blanking table 25A (refer to...) Figure 3) After the upper die 40 is lowered to approach the lower die 20, the strip-shaped metal plate W is punched by the inner-punching punch 45A and the inner-punching die hole 26A. Thus, the inner shape of the core member 5 is formed in the strip-shaped metal plate W. In the outer-punching stage 25C (see Figure 3 ) After the upper die 40 is lowered to approach the lower die 20, the strip-shaped metal plate W is punched by the outer-punching punch 45C and the outer-punching die hole 26C. Thus, the outer shape of the core member 5 is formed in the strip-shaped metal plate W to complete the core member 5 (see also Figure 2 ). The core members 5 are sequentially stacked in the outer-punching die hole 26C. As described later, since the lower surface of the completed core member 5 is coated with an adhesive, the core members 5 stacked in the up-and-down direction are adhered to each other by stacking the core members 5.

[0035] As shown in Figure 5 , a stripper plate 60 is provided to the upper die 40. The stripper plate 60 is disposed at a position opposite to the die plate 22 of the lower die 20. The stripper plate 60 is configured to be movable in the up-and-down direction together with the upper die 40. The stripper plate 60 is configured to be movable downward to a lowermost position LP (see Figure 7C ) which is the lowermost position. When the strip-shaped metal plate W is punched by the punch 45, the stripper plate 60 restricts the movement of the metal plate W in the up-and-down direction at the lowermost position LP. In addition, even if the stripper plate 60 is located slightly upward from the lowermost position LP, the stripper plate 60 can restrict the movement of the metal plate W in the up-and-down direction. The stripper plate 60 is configured to press the intermittently fed strip-shaped metal plate W against the lower die 20 (here, the die plate 22 and the die 23) to sandwich the strip-shaped metal plate W with the lower die 20 (here, the die plate 22 and the die 23) when the stripper plate 60 is moved to the lowermost position LP. The stripper plate 60 presses the strip-shaped metal plate W against the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23. The stripper plate 60 is formed with a punch insertion hole 60A through which the inner-punching punch 45A is inserted and a punch insertion hole 60C through which the outer-punching punch 45C is inserted. When the upper die 40 is further lowered in the state where the stripper plate 60 presses the strip-shaped metal plate W against the die plate 22, the inner-punching punch 45A protrudes from the punch insertion hole 60A, the inner-punching punch 45A is inserted into the inner-punching die hole 26A, and the outer-punching punch 45C protrudes from the punch insertion hole 60C, the outer-punching punch 45C is inserted into the outer-punching die hole 26C.

[0036] As shown in Figure 3As shown, the adhesive application device 70 is disposed on the lower die body 21 of the lower die 20. The adhesive application device 70 is positioned between the inner die-cutting table 25A and the outer die-cutting table 25C. In this embodiment, "the adhesive application device 70 is positioned between the inner die-cutting table 25A and the outer die-cutting table 25C" includes the case where the adhesive application device 70 is disposed together with the inner die-cutting table 25A (e.g., disposed on the first die-cutting plate 22A) and the case where the adhesive application device 70 is disposed together with the outer die-cutting table 25C (e.g., disposed on the second die-cutting plate 22C). Figure 3 In the example shown, nozzles 72 of multiple adhesive coating devices 70 are illustrated. The nozzles 72 are arranged in a double-ring pattern at approximately equal intervals. The adhesive coating device 70 is mounted on an adhesive coating stage 25B (see also...). Figure 5 More specifically, the adhesive coating apparatus 70 is disposed within the adhesive coating through-hole 27. The adhesive coating apparatus 70 is located below the strip metal plate W. The adhesive coating apparatus 70 applies adhesive to the lower surface WL of the strip metal plate W. The adhesive coating apparatus 70 applies adhesive to the lower surface WL of the strip metal plate W midway through its transport from the inner blanking table 25A to the outer blanking table 25C. In this embodiment, the adhesive coating apparatus 70 applies adhesive to the lower surface WL of the strip metal plate W using a non-contact coating method (e.g., spray dispensing or atomization). Examples of liquid adhesives used in the adhesive coating apparatus 70 include epoxy adhesives, acrylic adhesives, silicone adhesives, and polyurethane adhesives, but there are no particular limitations as long as sufficient adhesive force can be obtained to form the laminated iron core 8. Furthermore, there are no particular limitations on the method of applying adhesives; for example, solvent-evaporating, moisture-curing, heat-curing, and curing agent mixtures can be used.

[0037] like Figures 6A-6D As shown, the adhesive coating apparatus 70 includes a housing 71, a nozzle 72, a plunger 73, and a supply pipe 74. The housing 71 has an adhesive receiving chamber 71A for filling with adhesive. The housing 71 also has a through hole 71B through which the supply pipe 74 is inserted. The adhesive receiving chamber 71A communicates with the through hole 71B. The nozzle 72 is formed in the housing 71. The nozzle 72 communicates with the adhesive receiving chamber 71A. The nozzle 72 is located below the strip-shaped metal plate W. The nozzle outlet 72A is located below the upper surface 22T of the punching die 22 (which serves as the uppermost surface of the lower die 20) and the upper surface 23T of the punch 23 (see reference). Figure 5). The nozzle 72 sprays the adhesive toward the lower surface WL of the metal strip W. The adhesive sprayed from the nozzle 72 is applied to the lower surface WL of the metal strip W as droplets. A portion of the plunger 73 is housed in the adhesive housing chamber 71A of the housing. The plunger 73 slides within the adhesive housing chamber 71A. The plunger 73 is configured to open and close the through-hole 71B. The supply pipe 74 is inserted through the through-hole 71B. The supply pipe 74 is connected to an adhesive housing tank (not shown) that houses the adhesive. For example, the supply pump (not shown) is driven by the coating control section 94 (see FIG. 6) of the control device 90 described later, whereby the adhesive is supplied to the adhesive housing chamber 71A via the supply pipe 74. Figure 1

[0038] As shown in FIG. 6, when the adhesive coating device 70 is not in operation, a majority of the plunger 73 is housed in the adhesive housing chamber 71A. At this time, since the through-hole 71B is closed by the plunger 73, the adhesive housing chamber 71A is not in communication with the through-hole 71B, and the adhesive is not supplied to the adhesive housing chamber 71A. As shown in FIG. 7, when a signal is supplied to the adhesive coating device 70, the plunger 73 moves downward, the through-hole 71B is opened, and the adhesive housing chamber 71A is in communication with the through-hole 71B. Thereby, as indicated by the arrow Fl, the adhesive is supplied to the adhesive housing chamber 71A via the supply pipe 74. As shown in FIG. 8, when the filling of the adhesive into the adhesive housing chamber 71A is completed, the plunger 73 moves upward. Thereby, the adhesive G filled into the adhesive housing chamber 71A is ejected from the nozzle 72. At this time, the plunger 73 closes the through-hole 71B. As shown in FIG. 9, the adhesive G ejected from the nozzle 72 is applied to the lower surface WL of the metal strip W, and the adhesive G adheres to the lower surface WL. At this time, the adhesive G, which is sprayed from the nozzle outlet 72A as droplets, expands to a range of an area larger than the opening area of the nozzle outlet 72A when applied (adhered) to the lower surface WL of the metal strip W. Figure 6A Figure 6B Figure 6C Figure 6D

[0039] As shown in FIG. 6, when the adhesive coating device 70 is not in operation, a majority of the plunger 73 is housed in the adhesive housing chamber 71A. At this time, since the through-hole 71B is closed by the plunger 73, the adhesive housing chamber 71A is not in communication with the through-hole 71B, and the adhesive is not supplied to the adhesive housing chamber 71A. As shown in FIG. 7, when a signal is supplied to the adhesive coating device 70, the plunger 73 moves downward, the through-hole 71B is opened, and the adhesive housing chamber 71A is in communication with the through-hole 71B. Thereby, as indicated by the arrow Fl, the adhesive is supplied to the adhesive housing chamber 71A via the supply pipe 74. As shown in FIG. 8, when the filling of the adhesive into the adhesive housing chamber 71A is completed, the plunger 73 moves upward. Thereby, the adhesive G filled into the adhesive housing chamber 71A is ejected from the nozzle 72. At this time, the plunger 73 closes the through-hole 71B. As shown in FIG. 9, the adhesive G ejected from the nozzle 72 is applied to the lower surface WL of the metal strip W, and the adhesive G adheres to the lower surface WL. At this time, the adhesive G, which is sprayed from the nozzle outlet 72A as droplets, expands to a range of an area larger than the opening area of the nozzle outlet 72A when applied (adhered) to the lower surface WL of the metal strip W. Figure 1 ​​​​​As shown, the control device 90 controls the upper mold 40 and the adhesive coating apparatus 70. The control device 90 includes, for example, a central processing unit (CPU) that executes commands for the control program; a ROM storing the program executed by the CPU; RAM used as a working area for the program; and a memory storing the aforementioned program and various data. The control device 90 has a movement control unit 92 and a coating control unit 94. The functions of each part of the control device 90 are implemented by a program. This program is, for example, a program downloaded via the Internet. Alternatively, the program can be read from a recording medium such as a CD or DVD. Furthermore, the functions of each part of the control device 90 can also be implemented by a processor and / or circuitry.

[0040] The movement control unit 92 controls the vertical movement of the ejector plate 60. In this embodiment, the movement control unit 92 controls the vertical movement of the ejector plate 60 by moving the upper mold 40 vertically. The movement control unit 92 also controls the approach and departure of the upper mold 40 from the lower mold 20.

[0041] The coating control unit 94 controls the adhesive coating apparatus 70. The coating control unit 94 controls the movement of the plunger 73. The coating control unit 94 controls the movement of the plunger 73 when the template 60 is not in the lowest position LP (see reference). Figure 7C When the template 60 has not pressed the strip metal plate W against the die 22 and the die 23, the plunger 73 moves downward to complete the filling of the adhesive into the adhesive receiving chamber 71A. The coating control unit 94, when the template 60 is not in its lowest position LP (see reference...), moves the plunger 73 downward to complete the filling of the adhesive into the adhesive receiving chamber 71A. Figure 7C When the adhesive is applied from the adhesive application apparatus 70 to the lower surface WL of the strip metal sheet W, the coating control unit 94 applies the adhesive from the adhesive application apparatus 70 to the lower surface WL of the strip metal sheet W, for example, when the strip mold 60 has not pressed the strip metal sheet W against the lower die 20 (here, the punching mold 22 and the punching die 23). Here, when the strip mold 60 has not pressed the strip metal sheet W against the lower die 20 (here, the punching mold 22 and the punching die 23), it includes: Figure 7A As shown, there is no gap between the ejector plate 60 and the strip metal plate W (the ejector plate 60 is in contact with the strip metal plate W), and there is a gap between the strip metal plate W and the upper surface 22T of the punching die 22 and the upper surface 23T of the punching die 23; and as... Figure 7BAs shown, in the case where a gap exists between the stripper plate 60 and the metal strip W (i.e., in the case where the stripper plate 60 is not in contact with the metal strip W). That is, the application control section 94 causes the adhesive to be applied to the lower surface WL of the metal strip W from the adhesive application device 70 when a gap is formed in at least a portion of at least one of between the lower die 20 and the metal strip W and between the metal strip W and the stripper plate 60. In addition, as shown in Figure 7A and Figure 7B As shown, in the case where the stripper plate 60 does not press the metal strip W against the lower die 20 (here, the punch plate 22 and the punch 23), the metal strip W is moved upward by the lifting member 30, and thus a gap exists between the metal strip W and the lower die 20 (here, the upper surface 22T of the punch plate 22 and the upper surface 23T of the punch 23). As shown in Figure 7C As shown, in the case where the stripper plate 60 presses the metal strip W against the punch plate 22, there is no gap between the stripper plate 60 and the metal strip W and there is no gap between the metal strip W and the lower die 20 (here, the upper surface 22T of the punch plate 22 and the upper surface 23T of the punch 23).

[0042] The application control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal strip W from the adhesive application device 70 when the stripper plate is not in contact with the metal strip W. The application control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal strip W from the adhesive application device 70 when the stripper plate 60 is moved in a direction away from the lower die 20 (i.e., when the stripper plate 60 is moved upward). The application control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal strip W from the adhesive application device 70 when the stripper plate 60 is moved in a direction toward the lower die 20 (i.e., when the stripper plate 60 is moved downward). The application control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal strip W from the adhesive application device 70 when the conveyance of the metal strip W is stopped. The application control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal strip W from the adhesive application device 70 when the metal strip W is conveyed (i.e., moved) from the outer blanking stage 25C to the inner blanking stage 25A.

[0043] Next, the method of manufacturing the laminated core 8 will be described. Here, the method of manufacturing the laminated core 8 will be described with focus on one core member 5 that constitutes the laminated core 8. Figure 8 is a flowchart showing the method of manufacturing the laminated core 8. As shown in Figure 8As shown, the manufacturing method of the laminated core 8 includes a conveyance process (step S10), a descent process (step S20), an inner-die blanking process (step S30), an ascent process (step S40), a conveyance process (step S50), a descent process (step S60), an ascent process (step S70), an adhesive application process (step S80), a conveyance process (step S90), a descent process (step S100), an outer-die blanking process (step S110), an ascent process (step S120), and a conveyance process (step S130). In addition, the conveyance process (step S10), the conveyance process (step S50), the conveyance process (step S90), and the conveyance process (step S130) are performed simultaneously. The descent process (step S20), the descent process (step S60), and the descent process (step S100) are performed simultaneously. The inner-die blanking process (step S30) and the outer-die blanking process (step S110) are performed simultaneously. The ascent process (step S40), the ascent process (step S70), and the ascent process (step S120) are performed simultaneously. In addition, in the manufacturing method of the laminated core 8 of the present embodiment, as shown in the timing chart of FIG. 6, in one cycle in which the angle (crank angle) of the upper die 40 passes from the top dead center (0°) through the bottom dead center (180°) and returns to the top dead center (360°) again, the processes are performed in the order of the conveyance process (step S10, step S50, step S90, and step S130), the descent process (step S20, step S60, step S100), the inner-die blanking process (step S30), and the outer-die blanking process (step S110), the ascent process (step S40, step S70, and step S120), the adhesive application process (step S80), and the conveyance process (step S10, step S50, step S90, and step S130). Figure 9

[0044] In the conveyance process (step S10), the strip-shaped metal plate W is conveyed in the conveyance direction D. A portion of the strip-shaped metal plate W is moved onto the inner-die blanking stage 25A.

[0045] In the descent process (step S20), when the upper die 40 is moved downward and the stripper plate 60 is moved downward, the stripper plate 60 comes into contact with the strip-shaped metal plate W. By further moving the upper die 40 downward, the stripper plate 60 is moved to the lowermost position LP. At this time, in the inner-die blanking stage 25A, the strip-shaped metal plate W is pressed against the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by the stripper plate 60. Thus, the strip-shaped metal plate W is sandwiched by the stripper plate 60, the die plate 22, and the die 23.

[0046] ​In the inner shape blanking process (step S30), the inner shape of the core member 5 is formed by blanking the strip-shaped metal plate W with the inner shape blanking punch 45A while the stripper plate 60 is positioned at the lowermost position LP. More specifically, the inner shape blanking punch 45A and the inner shape blanking die hole 26A blank the strip-shaped metal plate W pressed against the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by further downward movement of the upper die 40, and the inner shape of the core member 5 is formed in the strip-shaped metal plate W. In the inner shape blanking process (step S30), the strip-shaped metal plate W is clamped by the stripper plate 60 and the die plate 22 and the die 23. The step S30 is performed halfway through the step S20.

[0047] In the upward movement process (step S40), the stripper plate 60 moves upward by upward movement of the upper die 40, and the pressing force of the strip-shaped metal plate W by the stripper plate 60 decreases. Then, the strip-shaped metal plate W is separated from the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by the lifting member 30. When the upper die 40 further moves upward and the stripper plate 60 further moves upward, the stripper plate 60 is separated from the strip-shaped metal plate W in the inner shape blanking stage 25A.

[0048] In the conveying process (step S50), the strip-shaped metal plate W is conveyed in the conveying direction D. The portion of the strip-shaped metal plate W in which the inner shape of the core member 5 is formed is moved onto the adhesive applying stage 25B.

[0049] In the downward movement process (step S60), the strip-shaped metal plate W is pressed against the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by the stripper plate 60 in the adhesive applying stage 25B as in the step S20. Thus, the strip-shaped metal plate W is clamped by the stripper plate 60 and the die plate 22 and the die 23.

[0050] In the upward movement process (step S70), the stripper plate 60 moves upward by upward movement of the upper die 40, and the pressing force of the strip-shaped metal plate W by the stripper plate 60 decreases. Then, the strip-shaped metal plate W is separated from the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by the lifting member 30. When the upper die 40 further moves upward and the stripper plate 60 further moves upward, the stripper plate 60 is separated from the strip-shaped metal plate W in the adhesive applying stage 25B.

[0051] In the adhesive application process (step S80), the adhesive is applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70. In more detail, when the stripper plate 60 is not located at the lowermost position LP, the adhesive is applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 located below the metal strip W. For example, when the stripper plate 60 is not in contact with the metal strip W, the adhesive is applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 located below the metal strip W. In step S80, the adhesive is applied (sprayed) to a prescribed portion of the lower surface WL of the metal strip W in which the inner shape of the core member 5 is formed. Step S80 can be performed after step S70, or can be performed midway through step S70. The adhesive can also be applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 when the stripper plate 60 is not pressing the metal strip W against the die plate 22 and the die 23. That is, the adhesive can be applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 when a gap is formed in at least a portion of at least one of between the lower die 20 and the metal strip W and between the metal strip W and the stripper plate 60. In the case where step S80 is performed midway through step S70, the adhesive can be applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 when the stripper plate 60 is not pressing the metal strip W against the die plate 22 and the die 23. Figure 9 In the example shown, step S80 is started immediately after completion of step S60, but step S80 can be started after a lapse of time after completion of step S60. Also, in step S80, the adhesive is applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 when the stripper plate 60 is moving in a direction away from the lower die 20 (i.e., moving upward). Also, in step S80, the adhesive is applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 when the conveyance of the metal strip W is stopped. Also, in step S80, the adhesive can be applied (sprayed) to the lower surface WL of the metal strip W from the adhesive application device 70 when the metal strip W is being conveyed. At this time, the conveyance speed at which the metal strip W is conveyed can be constant, or the conveyance speed can be slowed when the adhesive is being applied to the lower surface WL of the metal strip W.

[0052] In the conveyance process (step S90), the metal strip W is conveyed in the conveyance direction D. The prescribed portion of the metal strip W in which the adhesive has been applied moves onto the outer shape blanking stage 25C.

[0053] In the lowering process (step S100), as in step S20, the metal strip W is pressed against the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by the stripper plate 60 in the outer shape blanking stage 25C. As a result, the metal strip W is clamped by the stripper plate 60 and the die plate 22 and the die 23.

[0054] In the outer shape blanking process (step S110), the outer shape of the core member 5 is formed by blanking the strip-shaped metal plate W with the outer shape blanking punch 45C while the stripper plate 60 is located at the lowermost position LP. More specifically, the outer shape of the core member 5 is formed in the strip-shaped metal plate W by blanking the strip-shaped metal plate W pressed against the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 with the outer shape blanking punch 45C and the outer shape blanking die hole 26C by further moving the upper die 40 downward. The core member 5 formed is pressed by the outer shape blanking punch 45C and is sequentially stacked in the outer shape blanking die hole 26C. Since the lower surface of the core member 5 formed is coated with the adhesive, the stacked core member 5 is sequentially stacked on the core member 5 already stacked in the outer shape blanking die hole 26C, thereby manufacturing the laminated core 8 including a plurality of core members 5 stacked in the vertical direction and adhered to each other. In step S110, the strip-shaped metal plate W is clamped by the stripper plate 60 and the die plate 22 and the die 23. Step S110 is performed halfway through step S100.

[0055] In the upward movement process (step S120), the stripper plate 60 is moved upward by moving the upper die 40 upward, and the pressing force of the strip-shaped metal plate W by the stripper plate 60 is reduced. Then, the strip-shaped metal plate W is separated from the upper surface 22T of the die plate 22 and the upper surface 23T of the die 23 by the lifting member 30. When the upper die 40 is further moved upward and the stripper plate 60 is further moved upward, the stripper plate 60 is separated from the strip-shaped metal plate W in the outer shape blanking stage 25C.

[0056] In the conveying process (step S130), the strip-shaped metal plate W is conveyed in the conveying direction D. The portion of the strip-shaped metal plate W in which the outer shape of the core member 5 is formed (i.e., the scrap) is conveyed to the outside of the manufacturing apparatus 10.

[0057] As described above, according to the manufacturing apparatus 10 of the laminated core of the present embodiment, the coating control section 94 of the control apparatus 90 causes the adhesive to be coated to the lower surface WL of the strip-shaped metal plate W from the adhesive coating apparatus 70 when the stripper plate 60 is not located at the lowermost position LP. According to the above-described manner, when the adhesive is coated to the lower surface WL of the strip-shaped metal plate W from the adhesive coating apparatus 70, the interval between the strip-shaped metal plate W and the adhesive coating apparatus 70 is wide because the stripper plate 60 is not located at the lowermost position LP. Therefore, the adhesive coated from the adhesive coating apparatus 70 adheres to a wide range of the lower surface WL of the strip-shaped metal plate W. Thus, the adhesion of the stacked core members 5 to each other is strengthened, and the laminated core 8 having excellent rigidity can be manufactured.

[0058] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the coating control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal plate W from the adhesive application device 70 when the stripper plate 60 does not press the metal plate W against the lower mold 20. According to the above-described manner, when the adhesive is applied to the lower surface WL of the metal plate W from the adhesive application device 70, the spacing between the strip-shaped metal plate W and the adhesive application device 70 becomes wider because the stripper plate 60 does not press the metal plate W. Thus, the adhesive can be applied to a large area of the lower surface WL of the metal plate W.

[0059] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the coating control section 94 can also cause the adhesive to be applied to the lower surface WL of the metal plate W from the adhesive application device 70 when a gap is formed in at least a portion of at least one of between the lower mold 20 and the metal plate W and between the metal plate W and the stripper plate 60. According to the above-described manner, when the adhesive is applied to the lower surface WL of the metal plate W from the adhesive application device 70, the spacing between the strip-shaped metal plate W and the adhesive application device 70 becomes wider because the gap is formed. Thus, the adhesive can be applied to a large area of the lower surface WL of the metal plate W.

[0060] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the coating control section 94 causes the adhesive to be applied to the lower surface WL of the strip-shaped metal plate W from the adhesive application device 70 when the stripper plate 60 is not in contact with the strip-shaped metal plate W. According to the above-described manner, when the adhesive is applied to the lower surface WL of the strip-shaped metal plate W from the adhesive application device 70, the spacing between the strip-shaped metal plate W and the adhesive application device 70 becomes wider because the stripper plate 60 is not in contact with the strip-shaped metal plate W. Thus, the adhesive applied from the adhesive application device 70 adheres to a larger area of the lower surface WL of the strip-shaped metal plate W.

[0061] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the coating control section 94 causes the adhesive to be applied to the lower surface WL of the strip-shaped metal plate W from the adhesive application device 70 when the stripper plate 60 is moved in a direction away from the lower mold 20. According to the above-described manner, because the direction of the air current generated when the stripper plate 60 is moved coincides with the direction in which the adhesive is applied, the adhesive can be more reliably applied to the lower surface WL of the strip-shaped metal plate W.

[0062] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the coating control section 94 causes the adhesive to be applied to the lower surface WL of the strip-shaped metal plate W from the adhesive application device 70 when the transport of the strip-shaped metal plate W is stopped. According to the above-described manner, the adhesive can be more reliably applied to a prescribed position of the lower surface WL of the strip-shaped metal plate W.

[0063] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the adhesive applying device 70 is arranged between the inner-punching table 25A and the outer-punching table 25C, and the adhesive is applied to the lower surface WL of the metal plate W when the metal plate W is conveyed from the inner-punching table 25A to the outer-punching table 25C. According to the above-described arrangement, for example, the nozzles 72 of the plurality of adhesive applying devices 70 can be arranged in a direction orthogonal to the conveying direction D of the metal plate W in plan view, and thus the inner-punching table 25A and the outer-punching table 25C can be arranged compactly in the conveying direction D. That is, the manufacturing time can be shortened.

[0064] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the adhesive applying device 70 has the nozzle 72 which is located lower than the metal plate W and which sprays the adhesive toward the lower surface WL of the metal plate W. According to the above-described arrangement, since the nozzle 72 can spray the adhesive, the adhesive can be applied to a wider range of the lower surface WL of the metal plate W.

[0065] In the manufacturing apparatus 10 for the laminated core of the present embodiment, the nozzle 72 is located lower than the upper surface 22T of the punch plate 22 and the upper surface 23T of the punch 23 which are the uppermost surfaces of the lower mold 20. According to the above-described arrangement, since the nozzle 72 is located lower than the upper surface 22T of the punch plate 22 and the upper surface 23T of the punch 23 which are the uppermost surfaces of the lower mold 20, the nozzle 72 can spray the adhesive toward the lower surface WL of the metal plate W. Thus, the adhesive can be applied to a wider range of the lower surface WL of the metal plate W.

[0066] In the manufacturing method for the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive is applied from the adhesive applying device 70 to the lower surface WL of the metal plate W when the stripper plate 60 is not located at the lowermost position LP. According to the above-described arrangement, since the stripper plate 60 is not located at the lowermost position LP when the adhesive is applied to the lower surface WL of the metal plate W, the metal plate W is spaced apart from the adhesive applying device 70. Thus, the adhesive applied from the adhesive applying device 70 adheres to a wide range of the lower surface WL of the metal plate W. As a result, the adhesion between the laminated core members 5 is strengthened, and a laminated core 8 having excellent rigidity can be manufactured.

[0067] In the manufacturing method for the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive can be applied from the adhesive applying device 70 to the lower surface WL of the metal plate W when the stripper plate 60 does not press the metal plate W against the lower mold 20. According to the above-described arrangement, since the stripper plate 60 does not press the metal plate W when the adhesive is applied from the adhesive applying device 70 to the lower surface WL of the metal plate W, the metal plate W is spaced apart from the adhesive applying device 70. Thus, the adhesive can be applied to a wide range of the lower surface WL of the metal plate W.

[0068] In the manufacturing method of the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive can be applied to the lower surface WL of the metal plate W from the adhesive applying device 70 when a gap is formed in at least a portion of at least either one of the lower die 20 and the metal plate W and the metal plate W and the stripper plate 60. According to the above-described manner, when the adhesive is applied to the lower surface WL of the metal plate W from the adhesive applying device 70, the gap is formed, and thus the distance between the metal plate W in the strip shape and the adhesive applying device 70 becomes wider. Thus, the adhesive can be applied to a wide range of the lower surface WL of the metal plate W.

[0069] In the manufacturing method of the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive is applied to the lower surface WL of the metal plate W from the adhesive applying device 70 when the stripper plate 60 is not in contact with the metal plate W in the strip shape. According to the above-described manner, when the adhesive is applied to the lower surface WL of the metal plate W in the strip shape, the distance between the metal plate W in the strip shape and the adhesive applying device 70 becomes wider because the stripper plate 60 is not in contact with the metal plate W in the strip shape. Thus, the adhesive applied from the adhesive applying device 70 adheres to a wider range of the lower surface WL of the metal plate W in the strip shape.

[0070] In the manufacturing method of the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive is applied to the lower surface WL of the metal plate W from the adhesive applying device 70 when the stripper plate 60 is moved in a direction away from the lower die 20. According to the above-described manner, because the direction of the air current generated when the stripper plate 60 is moved coincides with the direction in which the adhesive is applied, the adhesive can be more reliably applied to the lower surface WL of the metal plate W in the strip shape.

[0071] In the manufacturing method of the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive is applied to the lower surface WL of the metal plate W from the adhesive applying device 70 when the conveyance of the metal plate W in the strip shape is stopped. According to the above-described manner, the adhesive can be more reliably applied to a predetermined position of the lower surface WL of the metal plate W in the strip shape.

[0072] In the manufacturing method of the laminated core of the present embodiment, in the adhesive applying step (step S80), the adhesive is sprayed to the lower surface WL of the metal plate W from the adhesive applying device 70. According to the above-described manner, because the adhesive can be sprayed, the adhesive can be applied to a wider range of the lower surface WL of the metal plate W in the strip shape.

[0073] The preferred embodiments of the present application have been described above. However, the above-described embodiments are merely examples, and the present application can be implemented in various other ways.

[0074] In the above embodiment, the adhesive applying device 70 applies the adhesive to the lower surface WL of the metal strip W by the non-contact application method, but is not limited thereto. The adhesive applying device 70 can also, for example, cause the adhesive protruding from the nozzle 72 to contact the metal strip W to transfer the adhesive to the lower surface WL.

[0075] In the above embodiment, the application control section 94 moves the plunger 73 downward to fill the adhesive into the adhesive accommodating chamber 71A when the stripper plate 60 does not press the metal strip W against the die plate 22 and the die 23, but is not limited thereto. The application control section 94 can also move the plunger 73 downward to complete the filling of the adhesive into the adhesive accommodating chamber 71A when the stripper plate 60 presses the metal strip W against the die plate 22 and the die 23. In addition, the application control section 94 can move the plunger 73 downward to start the filling of the adhesive into the adhesive accommodating chamber 71A when the stripper plate 60 presses the metal strip W against the die plate 22 and the die 23, and complete the filling of the adhesive into the adhesive accommodating chamber 71A when the stripper plate 60 does not press the metal strip W against the die plate 22 and the die 23.

[0076] In the above embodiment, the die main body 21, the die plate 22, and the die 23 of the lower die 20 are separately formed, but can be appropriately formed integrally. For example, the die plate 22 and the die 23 can be formed integrally, or the die plate 22, the die 23, and the die main body 21 can be formed integrally.

[0077] In the above embodiment, the upper surface 23T of the die 23 and the upper surface 22T of the die plate 22 are located at the same height, but are not limited thereto. For example, the upper surface 23T of the die 23 can be located lower than the upper surface 22T of the die plate 22. In this case, the stripper plate 60 presses the metal strip W against the upper surface 22T of the die plate 22.

[0078] In the above embodiment, the die plate 22 and the die 23 are placed on the die main body 21, but are not limited thereto. For example, the die plate 22 and the die 23 can be embedded in a recess formed so as to be recessed downward from the upper surface 21T of the die main body 21, so that the upper surface 21T of the die main body 21, the upper surface 22T of the die plate 22, and the upper surface 23T of the die 23 are located at the same height. In this case, the stripper plate 60 presses the metal strip W against the upper surface 21T of the die main body 21, the upper surface 22T of the die plate 22, and the upper surface 23T of the die 23.

[0079] In the above embodiments, in the manufacturing method of the laminated iron core 8, the adhesive coating process (step S80) is performed midway or after the rising process (step S70), but as... Figure 10 As shown, the adhesive application process (step S180) can also be performed midway through or before the descent process (step S60). In step S180, adhesive is applied (sprayed) from the adhesive application apparatus 70 onto the lower surface WL of the strip metal plate W. More specifically, when the demolding template 60 is not in contact with the strip metal plate W, adhesive is applied (sprayed) from the adhesive application apparatus 70 located below the strip metal plate W onto the lower surface WL of the strip metal plate W. In step S180, adhesive is applied (sprayed) onto a designated portion of the lower surface WL of the strip metal plate W where the inner shape of the core member 5 is formed. In step S180, adhesive can also be applied (sprayed) from the adhesive application apparatus 70 onto the lower surface WL of the strip metal plate W before the demolding template 60 presses the strip metal plate W against the punching template 22 and the punching die 23. Additionally, in step S180, when the template 60 moves towards the lower mold 20 (i.e., downwards), adhesive is applied (sprayed) from the adhesive application device 70 onto the lower surface WL of the strip metal sheet W. Also in step S180, when the conveying of the strip metal sheet W stops, adhesive is applied (sprayed) from the adhesive application device 70 onto the lower surface WL of the strip metal sheet W. Alternatively, in step S180, adhesive can also be applied (sprayed) from the adhesive application device 70 onto the lower surface WL of the strip metal sheet W while the metal sheet W is being conveyed.

[0080] In the above embodiment, the coating control unit 94 applies adhesive from the adhesive coating apparatus 70 to the lower surface WL of the strip metal sheet W when the conveying of the strip metal sheet W stops, but is not limited to this. The coating control unit 94 may also apply adhesive from the adhesive coating apparatus 70 to the lower surface WL of the strip metal sheet W while the strip metal sheet W is being conveyed in the forward conveying direction D.

[0081] In the above embodiment, when the ejector plate 60 moves to the lowest position LP, it presses the metal plate W against the lower mold 20 and clamps the metal plate W together with the lower mold 20, but it is not limited to this. For example, when the ejector plate 60 moves to the lowest position LP, a gap that can restrict the vertical movement of the metal plate W can be formed between the lower surface of the ejector plate 60 and the upper surface of the lower mold 20.

[0082] In the above-described embodiments, the nozzles 72 of the plurality of adhesive application devices 70 are arranged in a double-ring pattern at approximately equal intervals, but this is not a limitation. For example, as Figure 11 As shown, the multiple nozzles 72 can also be arranged at approximately equal intervals in a direction orthogonal to the feed direction D in a top view.

[0083] While the preferred embodiments of the application have been described above, it should be understood that various modifications and adaptations can be apparent to those skilled in the art without departing from the scope and spirit of the application. Therefore, the scope of the application is only determined by the following claims.

Claims

1. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein, The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit applies the adhesive from the adhesive coating device to the lower surface of the metal plate only when the template is not in the lowest position.

2. The manufacturing apparatus according to claim 1, wherein, The ejector plate is configured such that, when moved to the lowest position, it can press the metal plate against the lower mold and clamp the metal plate together with the lower mold. When the template has not pressed the metal plate against the lower mold, the coating control unit applies adhesive from the adhesive coating device to the lower surface of the metal plate.

3. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, applies the adhesive from the adhesive coating device to the lower surface of the metal plate. When a gap is formed between at least a portion of either the lower mold and the metal plate or between the metal plate and the release mold, the coating control unit applies adhesive from the adhesive coating device to the lower surface of the metal plate.

4. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, applies the adhesive from the adhesive coating device to the lower surface of the metal plate. The coating control unit applies adhesive from the adhesive coating device to the lower surface of the metal plate when the template is not in contact with the metal plate.

5. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, applies the adhesive from the adhesive coating device to the lower surface of the metal plate. The coating control unit causes the adhesive to be applied from the adhesive coating device to the lower surface of the metal plate as the stripper moves in the direction away from the lower mold.

6. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, applies the adhesive from the adhesive coating device to the lower surface of the metal plate. The coating control unit applies the adhesive from the adhesive coating device to the lower surface of the metal plate only when the conveying of the metal plate stops.

7. The manufacturing apparatus according to claim 1 or 2, wherein, As the template moves toward the lower mold, the coating control unit applies the adhesive from the adhesive coating device to the lower surface of the metal plate.

8. The manufacturing apparatus according to claim 1 or 2, wherein, When the metal plate is stopped being transported, the coating control unit causes the adhesive to be applied from the adhesive coating device to the lower surface of the metal plate.

9. The manufacturing apparatus according to claim 1 or 2, wherein, The lower mold includes: An inner blanking table blanks the metal sheet to form the inner shape of the core component; and A blanking table for blanking the metal sheet to form the shape of the iron core component. The adhesive coating device is disposed between the inner blanking table and the outer blanking table, and applies adhesive to the lower surface of the metal plate as the metal plate is conveyed from the inner blanking table to the outer blanking table.

10. The manufacturing apparatus according to claim 1 or 2, wherein, The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate.

11. The manufacturing apparatus according to claim 10, wherein, The nozzle's outlet is located below the uppermost surface of the lower mold.

12. A manufacturing method, wherein a plurality of core components are stacked and bonded together in a manufacturing apparatus, the manufacturing apparatus comprising: a lower die having a die having a punch hole; and an upper die having a punch corresponding to the punch hole; A template, positioned on the upper die and movable downwards to a lowest position (the lowest possible position), restricts the vertical movement of the metal sheet when punching the strip of metal with the punch; and an adhesive application device, applies adhesive to the lower surface of the metal sheet, wherein... The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The manufacturing method includes: In the adhesive coating process, when the template is not at the lowest position, adhesive is applied to the lower surface of the metal plate from the adhesive coating device located below the metal plate. The descent process moves the template to the lowest descent position; and In the punching process, when the die-off plate is in the lowest position, the punch is used to punch the metal plate to form the shape of the iron core component.

13. The manufacturing method according to claim 12, wherein, The ejector plate is configured such that, when moved to the lowest position, it can press the metal plate against the lower mold and clamp the metal plate together with the lower mold. In the adhesive coating process, before the metal plate is pressed against the lower mold by the template, the adhesive is applied from the adhesive coating device to the lower surface of the metal plate.

14. The manufacturing method according to claim 12, wherein, In the adhesive coating process, when a gap is formed in at least a portion of either the lower mold and the metal plate or the metal plate and the release mold, the adhesive is applied from the adhesive coating apparatus to the lower surface of the metal plate.

15. The manufacturing method according to claim 12, wherein, In the adhesive coating process, when the template is not in contact with the metal plate, the adhesive is applied from the adhesive coating device to the lower surface of the metal plate.

16. The manufacturing method according to claim 12 or 13, wherein, In the adhesive coating process, as the template moves away from the lower mold, adhesive is applied from the adhesive coating device to the lower surface of the metal plate.

17. The manufacturing method according to claim 12 or 13, wherein, In the adhesive coating process, as the template moves toward the lower mold, adhesive is applied from the adhesive coating device to the lower surface of the metal plate.

18. The manufacturing method according to claim 12 or 13, wherein, In the adhesive coating process, when the metal plate is stopped being conveyed, adhesive is applied from the adhesive coating device to the lower surface of the metal plate.

19. The manufacturing method according to claim 12 or 13, wherein, The lower mold includes: An inner blanking table blanks the metal sheet to form the inner shape of the core component; and A blanking table for blanking the metal sheet to form the shape of the iron core component. In the adhesive coating process, when the metal sheet is conveyed from the inner blanking table to the outer blanking table, the adhesive is applied to the lower surface of the metal sheet.

20. The manufacturing method according to claim 12 or 13, wherein, In the adhesive coating process, adhesive is sprayed from the adhesive coating apparatus onto the lower surface of the metal plate.

21. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit sprays adhesive from the adhesive coating device onto the lower surface of the metal plate only when the template is not in the lowest position.

22. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, sprays adhesive from the adhesive coating device onto the lower surface of the metal plate. When a gap is formed between at least a portion of either the lower mold and the metal plate or between the metal plate and the release mold, the coating control unit sprays adhesive from the adhesive coating device onto the lower surface of the metal plate.

23. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, sprays adhesive from the adhesive coating device onto the lower surface of the metal plate. When the template is not in contact with the metal plate, the coating control unit sprays adhesive from the adhesive coating device onto the lower surface of the metal plate.

24. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, sprays adhesive from the adhesive coating device onto the lower surface of the metal plate. As the stripper moves toward the direction of departure from the lower die, the coating control unit causes the adhesive to be sprayed from the adhesive coating device onto the lower surface of the metal plate.

25. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit, when the template is not in the lowest position, sprays adhesive from the adhesive coating device onto the lower surface of the metal plate. The coating control unit sprays adhesive from the adhesive coating device onto the lower surface of the metal plate only when the conveying of the metal plate stops.

26. An apparatus for manufacturing a laminated iron core, wherein the laminated iron core is formed by stacking and bonding multiple iron core components together, wherein... The manufacturing apparatus includes: The lower die has a punch with a punch hole formed in it; The upper die has a punch corresponding to the die hole; The ejector plate is set on the upper die and can move downward to the lowest position, which is the lowest position. When punching the strip of metal sheet with the punch, the movement of the metal sheet in the vertical direction is restricted at the lowest position. An adhesive coating device is disposed on the lower mold and located below the metal plate, and applies adhesive to the lower surface of the metal plate; and The control device controls the template release and the adhesive application device. The lower mold includes a lifting component configured to push the metal plate upwards and move downwards when the metal plate is pressed downwards by the ejector plate. The adhesive coating apparatus has a nozzle for spraying adhesive onto the lower surface of the metal plate. The control device has: The movement control unit controls the vertical movement of the template. and The coating control unit sprays adhesive from the adhesive coating device onto the lower surface of the metal plate only when the template is not in the lowest position. The nozzle's outlet is located below the uppermost surface of the lower mold.

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