Method and apparatus for applying adhesive

Abstract

The present invention provides an adhesive application method that allows for a reduction in the space required for applying the adhesive. [Solution] The method for applying the adhesive 27 involves feeding a steel plate 5 having an adhesive application area 29, moving the discharge port 31a of the adhesive 27 in a direction intersecting the feeding direction within a discharge area 35 that is smaller than the application area 29 in the feeding direction of the steel plate 5, and discharging the adhesive 27 from the discharge port 31a moving in the intersecting direction within the discharge area 35 to apply the adhesive 27 to the application area 29 of the steel plate 5 that is being fed in the feeding direction.

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for applying an adhesive to a plate material used for a core of a rotating electric machine or the like.

Background Art

[0002] As a conventional method for applying an adhesive, for example, as in Patent Document 1, there is a method of applying an adhesive to the surface of a sheet such as a ring-shaped stator sheet or rotor sheet.

[0003] This application of the adhesive is performed while rotating the nozzle of the adhesive with the sheet fixed. Thereby, the adhesive can be applied over the entire surface of the sheet.

[0004] However, in such an application method, since the nozzle is moved along the application area where the adhesive of the sheet is applied, it is necessary to make the space required for applying the adhesive equal to or larger than the application area.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The problem to be solved is that the space for applying the adhesive could not be reduced.

Means for Solving the Problems

[0007] The present invention provides an adhesive application method, comprising feeding a plate material having an adhesive application area, moving the adhesive discharge port in a direction intersecting the feeding direction within a discharge area smaller than the application area in the feeding direction of the plate material, and discharging the adhesive from the discharge port moving in the intersecting direction within the discharge area to apply the adhesive to the application area of ​​the plate material being fed in the feeding direction.

[0008] Furthermore, the present invention provides an adhesive application apparatus comprising: a feeding device for feeding a plate material having an adhesive application area; a discharge port for dispensing the adhesive; and a drive unit for moving the discharge port in a direction intersecting the feeding direction within a discharge area smaller than the application area in the feeding direction of the plate material, wherein the adhesive is dispensed from the discharge port moving in the intersecting direction within the discharge area to apply the adhesive to the application area of ​​the plate material being fed in the feeding direction. [Effects of the Invention]

[0009] According to the present invention, the space required for applying the adhesive can be reduced. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic cross-sectional side view of a part of a laminate manufacturing apparatus having an adhesive application device according to Example 1 of the present invention. [Figure 2] Figure 2 is a plan view showing a steel plate being coated with adhesive and punched out using the manufacturing apparatus shown in Figure 1. [Figure 3] Figure 3 is a schematic plan view showing the discharge port and coating area of ​​the dispensing device used in the manufacturing apparatus shown in Figure 1. [Figure 4] Figure 4 is a cross-sectional view taken along line IV-IV of Figure 1. [Figure 5] Figure 5 is an explanatory diagram showing the feed speed when the coating area passes through the discharge port in this embodiment, corresponding to the coating area. [Figure 6] Figure 6 is a schematic plan view showing the discharge port and coating area of ​​the discharge device used in the manufacturing apparatus according to a modified example of Example 1. [Figure 7] Figure 7 is a schematic plan view showing the discharge port and coating area of ​​a dispensing device used in a manufacturing apparatus according to another modification of Example 1. [Figure 8] Figure 8 is a schematic plan view showing the discharge port and coating area of ​​the discharge device used in the manufacturing apparatus according to Embodiment 2 of the present invention. [Figure 9] Figure 9 is a schematic plan view showing a feeding device used in the manufacturing apparatus according to Embodiment 3 of the present invention. [Figure 10] Figure 10 is a schematic plan view showing a feeding device used in a manufacturing apparatus according to a modified example of Example 3. [Modes for carrying out the invention]

[0011] In one embodiment of the adhesive 27 application method, plate materials 5 and 7 having an adhesive application area 29 are fed, and the discharge port 31a of the adhesive 27 is moved in a direction intersecting the feeding direction within a discharge area 35 that is smaller than the application area 29 in the feeding direction of the plate materials 5 and 7. Then, the adhesive 27 is discharged from the discharge port 31a moving in the intersecting direction within the discharge area 35 and applied to the application area 29 of the plate materials 5 and 7 that are being fed in the feeding direction.

[0012] The adhesive application device 28 comprises a feeding device 9 for feeding the sheet materials 5 and 7, a discharge port 31a for dispensing the adhesive 27, and a drive unit 33 for moving the discharge port 31a. The device dispenses the adhesive 27 from the discharge port 31a, which moves in a cross direction within the discharge area 35, and applies the adhesive 27 to the application area 29 of the sheet materials 5 and 7 that are being fed in the feeding direction.

[0013] In one embodiment of the adhesive application method and application apparatus 28, the adhesive 27 may be applied in a circular dot pattern to multiple application locations 37 in the application area 29.

[0014] The discharge ports 31a may be provided on one side and the other side of the coating area 29 in a direction perpendicular to the feeding direction. In this case, it is preferable that the discharge ports 31a on one side and the other side move in opposite directions in the intersecting direction.

[0015] The discharge port 31a may include a first discharge port 31Aa and a second discharge port 31Ba on each of one side and the other side in the width direction of the coating region 29. In this case, the first discharge port 31Aa and the second discharge port 31Ba alternately discharge the adhesive 27 to the coating locations 37 that are relatively close to each other at least in the feeding direction.

[0016] The intersecting direction can be a direction perpendicular or inclined to the feeding direction. When the intersecting direction is the perpendicular direction to the feeding direction, the plate materials 5 and 7 may be fed while changing their speeds. In this case, the discharge port 31a may move between the coating locations 37 that are relatively close to each other in the feeding direction when the feeding speeds of the plate materials 5 and 7 are relatively low.

[0017] When the intersecting direction is an inclined direction with respect to the feeding direction, it is preferable that the discharge port 31a moves between the coating locations 37 that are relatively close to each other in the feeding direction while moving downstream in the feeding direction along the intersecting direction.

Example

[0018] [Manufacturing apparatus for laminate] FIG. 1 is a schematic side view showing a part of a manufacturing apparatus for a laminate having an adhesive coating apparatus according to Embodiment 1 of the present invention in cross section. It is a plan view showing a steel plate on which adhesive coating and punching are performed by the manufacturing apparatus of FIG. 1. FIG. 3 is a schematic plan view showing the discharge port of the discharge apparatus and the coating region used in the manufacturing apparatus of FIG. 1. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1.

[0019] The manufacturing apparatus 1 for the laminate in FIG. 1 manufactures the core 3 of a rotating electric machine such as an electric motor or a generator as the laminate, or the blocks constituting the core 3. The blocks are intermediate laminates that constitute the core 3 by being laminated in a plurality. Note that the laminate may be one that laminates a plurality of plate-like bodies using an adhesive. In the present embodiment, the case where the laminate is the core 3 will be described. The core 3 is a stator core, but may be a rotor core.

[0020] In this embodiment, the manufacturing apparatus 1 forms a core 3 by sequentially punching out and stacking multiple disc-shaped core pieces 7 from a strip of steel sheet material 5, which is an electromagnetic steel sheet or silicon steel sheet that is supplied intermittently. The manufacturing apparatus 1 comprises a feeding device 9, a mold device 11, an ejection device 13, and a control unit 15.

[0021] The feed device 9 is a device for feeding the steel plate 5. This feed device 9 can be configured as appropriate, but in this embodiment it is equipped with a pair of feed rollers 9a. The feed rollers 9a feed the steel plate 5 by rotating with the steel plate 5 sandwiched between them. The feed rollers 9a are driven by a servo motor or the like (not shown).

[0022] The feed device 9 is configured to repeatedly feed and stop the steel plate 5. When the steel plate 5 is accelerating from a stationary state and when it is decelerating from a constant speed running state to a stop, the feeding speed of the steel plate 5 becomes relatively lower.

[0023] The mold device 11 includes an upper mold 17 and a lower mold 19. The upper mold 17 is configured to move up and down relative to the lower mold 19, and when it moves down, it performs punching with a punch 21. The punch 21 is provided projecting downward from the upper mold 17, and its tip passes through the stripper plate 23.

[0024] The stripper plate 23 is supported by a biasing member such as a spring relative to the upper die 17, and is movable toward the upper die 17 against the biasing force. The stripper plate 23 comes into contact with the steel plate 5 as the upper die 17 descends. In this state, as the upper die 17 descends further, the punch 21 protrudes relative to the stripper plate 23 and performs a punching operation.

[0025] The punch 21 of the upper die 17 includes a first punch 21a for punching out the inner circumference of the core piece 7 shown in Figure 2, and a second punch 21b for punching out the outer circumference of the core piece 7 shown in Figure 2.

[0026] The first punch 21a for punching the inner circumference is located upstream of the discharge device 13 in the feed direction of the steel plate 5, and the second punch 21b for punching the outer circumference is located downstream of the discharge device 13 in the feed direction of the steel plate 5. The feed direction is the left-right direction in Figures 1 to 3, with the left side being upstream and the right side being downstream. The first punch 21a for punching the inner circumference may also be located downstream of the discharge device 13 in the feed direction of the steel plate 5.

[0027] The lower die 19 consists of a first lower die 19a for inner circumference punching and a second lower die 19b for outer circumference punching. The first lower die 19a is positioned in correspondence with the first punch 21a for inner circumference punching of the upper die 17 and includes an inner circumference punching die (not shown). This first lower die 19a constitutes an inner circumference punching stage that performs inner circumference punching in cooperation with the first punch 21a.

[0028] The second lower die 19b is positioned in correspondence with the second punch 21b for punching the outer circumference of the upper die 17 and is equipped with a die 25 for punching the outer circumference. This second lower die 19b cooperates with the second punch 21b to perform outer circumference punching, forming an outer circumference punching stage that punches and holds the core piece 7.

[0029] The die 25 of this embodiment comprises a die body 25a and a squeeze ring 25b. The die body 25a is formed in a ring shape and is fixed to the inner circumference of the support hole 19ba of the second lower die 19b. The squeeze ring 25b is positioned adjacent to the die body 25a in the punching direction of the core piece 7 and is supported on the inner circumference of the support hole 19ba, similar to the die body 25a. The squeeze ring 25b is formed in a ring shape that is longer in the punching direction than the die body 25a.

[0030] The punching direction coincides with the axial direction of the core piece 7, and in this embodiment, it is the vertical direction. However, the punching direction and axial direction do not necessarily have to be vertical.

[0031] The squeeze ring 25b is the part that applies lateral pressure to hold the punched core pieces 7 by pressing them from the outer circumference. Within the squeeze ring 25b, a predetermined number of held core pieces 7 are stacked with adhesive 27 interposed between them to form a core 3.

[0032] The discharge device 13 in Figure 1, together with the feed device 9 and the drive unit 33 (described later), constitutes the adhesive application device 28 and adhesive application stage for the adhesive 27. The adhesive application stage refers to the part of the mold device 11 where the discharge device 13, and in particular the discharge port 31a (described later), is located. The adhesive application stage has two modes: one in which the portion of the steel plate 5 to be punched out as a core piece 7 passes through without stopping, and another in which it temporarily stops, depending on the feeding and stopping of the steel plate 5. As shown in Figures 2 and 3, the discharge device 13 applies the adhesive 27 to multiple application locations 37 in the circumferential direction of the application area 29 of the steel plate 5.

[0033] Note that the number of adhesive application locations 37 differs between Figure 2 and Figure 3, but Figure 2 shows the adhesive application locations 37 schematically. The application area 29 is defined on the surface of the core piece 7 to which the adhesive 27 can be applied. This application area 29 is the area for applying the adhesive 27, and is particularly defined by the outer edge of the circular movement trajectory of the discharge port 31a, which will be described later.

[0034] The discharge device 13 is positioned between the first lower mold 19a and the second lower mold 19b of the lower mold 19. However, the discharge device 13 does not need to be located inside the mold device 11, and may be located upstream of the mold device 11 in the feeding direction of the steel sheet 5.

[0035] The dispensing device 13 of this embodiment includes a dispensing unit 31 positioned below the steel plate 5, as shown in Figures 1, 3, and 4, and applies adhesive 27 to the lower surface of the steel plate 5. However, the dispensing unit 31 may be positioned above the steel plate 5, and the adhesive 27 may be applied to the upper surface of the steel plate 5. The dispensing unit 31 is positioned on one side and the other side of the coating area 29 in the width direction of the steel plate 5, which is perpendicular to the feeding direction. The width direction is the vertical direction in Figures 2 and 3, and the left-right direction in Figure 4.

[0036] The discharge sections 31 on one side and the other side are each equipped with discharge ports 31a for dispensing adhesive 27. Therefore, the discharge ports 31a are provided on one side and the other side in the width direction of the coating area 29.

[0037] The discharge ports 31a on one side and the other side are arranged symmetrically with respect to the center line in the width direction of the coating area 29. However, the arrangement of the discharge ports 31a does not need to be symmetrical, and they may be offset from each other in the feeding direction of the steel plate 5. In this case, interference between the discharge ports 31a on one side and the other side at both ends in the feeding direction of the coating area 29 can be suppressed.

[0038] The discharge port 31a can be, for example, a nozzle for spraying adhesive 27 onto the steel plate 5, or a nozzle for transferring the adhesive 27 that has accumulated at its tip onto the steel plate 5. If the discharge port 31a is of the transfer type, spot coating, as described later, can be accommodated by switching the supply of adhesive 27 to the nozzle tip ON / OFF with a valve or the like, or by moving the discharge port 31a forward and backward relative to the steel plate 5.

[0039] Furthermore, the adhesive 27 may be ejected using an inkjet method. For example, a piezoelectric element, heater, solenoid, etc., can be used to supply a predetermined amount of adhesive 27 from a reservoir to the discharge port 31a. When a piezoelectric element is used, the piezoelectric element is displaced by the applied voltage, reducing the volume of the reservoir, and the excess adhesive 27 is supplied to the discharge port 31a, allowing the adhesive 27 to be ejected with high responsiveness.

[0040] These discharge units 31 are supported by a drive unit 33 so as to be movable in an intersecting direction that intersects the feed direction. In this embodiment, the intersecting direction is perpendicular to the feed direction and coincides with the width direction. The drive unit 33 is a single-axis actuator and can be configured, for example, by a linear actuator using a ball screw.

[0041] By driving the discharge unit 31 with this drive unit 33, the discharge port 31a moves in a cross direction within the discharge region 35, which is smaller than the coating region 29 in the feeding direction of the steel plate 5. The discharge region 35 is a plan view of the movable area of ​​the discharge port 31a, and its largest dimension in the feeding direction is smaller than that of the coating region 29.

[0042] The discharge ports 31a move in opposite directions in the intersecting direction. Therefore, the discharge ports 31a move in a relative circular motion by reciprocating in opposite directions from a state where they are adjacent in the intersecting direction while feeding the steel plate 5. This allows the discharge ports 31a to move along the coating area 29 which has a circular outer edge. During this movement, the discharge ports 31a discharge the adhesive 27.

[0043] Note that there may be only one discharge port 31a. In this case, the steel plate 5 can be driven back and forth so that the discharge port 31a moves in a circular motion. If it is not necessary to move one discharge port 31a in a circular motion, it may be sufficient to simply move the steel plate 5 forward.

[0044] The adhesive 27a may be dispensed continuously or intermittently. In this embodiment, the adhesive 27 is dispensed intermittently, causing it to be applied in a circular dot pattern to multiple application locations 37 in the application area 29. However, the arrangement of the application locations 37 can be arbitrarily set by controlling the feeding of the steel plate 5 and the movement of the discharge port 31a.

[0045] Figure 3 shows the state after adhesive 27 has been applied to the application area 37 located at the downstream end in the feeding direction. The remaining application areas 37 in Figure 3 are areas where adhesive 27 is planned to be applied.

[0046] The application points 37 are arranged symmetrically with respect to the center line of the application area 29 along the feeding direction, but symmetry is not required. In other words, the application shape may differ on one side and the other side in the width direction of the application area 29. For example, the positions of corresponding application points 37 may be shifted or the spacing between adjacent application points 37 may differ on one side and the other side in the width direction of the application area 29. Also, some or all of the positions and spacing of the application points 37 may be irregular within one or the other side in the width direction of the application area 29. Furthermore, the amount of adhesive 27 applied may differ in some or all of the application points 37 within the entire application area 29 or within one or the other side in the width direction.

[0047] In this embodiment, the discharge port 31a moves between coating locations 37 that are relatively close in the feeding direction when the feeding speed of the steel plate 5 is relatively low. The coating locations 37 that are relatively close in the feeding direction are located on both sides of the coating area 29 in the feeding direction.

[0048] For example, coating locations 37 that are relatively close in the feed direction refer to cases where, when adjacent coating locations 37 are connected by a straight line, the feed direction component of the straight line is smaller than the width direction component. In this case, for example, among a plurality of annular coating locations 37, it is preferable that the feed speed of the steel plate 5 is low for coating locations 37 from around 0 degrees to around 45 degrees and from around 135 degrees to around 180 degrees.

[0049] In this embodiment, the feed speed of the steel plate 5 is reduced when the discharge port 31a moves to the coating area 37 from around 0 degrees to around 60 degrees and from around 120 degrees to around 180 degrees. In other words, the range in which the feed speed of the steel plate 5 is reduced is appropriately set within a range that ensures reliable coating of adjacent points, taking into consideration the continuous firing speed of the discharge port 31a, etc.

[0050] Figure 5 shows the feed speed corresponding to the coating location 37 when the coating location 37 passes through the discharge port 31a in this embodiment. Figure 5 shows the case where the discharge port 31a is located outside the portion to be punched out as the core piece 7. The acceleration of the steel plate 5 begins when the outside of the portion to be punched out as the core piece 7 passes through the discharge port 31a. During this acceleration of the steel plate 5, the coating locations 37 from around 0 degrees to around 60 degrees pass through the discharge port 31a. The coating locations 37 from around 60 degrees to around 120 degrees pass through the discharge port 31a when the steel plate 5 is moving at a constant speed, which is relatively high speed. After that, the deceleration of the steel plate 5 begins, and the discharge locations 37 from around 120 degrees to around 180 degrees pass through the discharge port 31a while the steel plate 5 is decelerating.

[0051] Note that 0 degrees is the position of the downstream end in the feed direction of the circle drawn by the discharge port 31a, which is located in the center of the width direction of the coating area 29. 180 degrees is the position of the upstream end in the feed direction of the circle drawn by the discharge port 31a, which is located in the center of the width direction of the coating area 29.

[0052] The discharge port 31a can be positioned to reliably move between relatively close coating locations 37 in the feeding direction when the feeding speed of the steel plate 5 is relatively low, by setting its position in the feeding direction. For example, if the pitch between stages is greater than twice the distance in the feeding direction between the coating location 37 near 0 degrees and the coating location 37 near 180 degrees on the core piece 7 in Figure 5, the discharge port 31a is positioned in the center of that distance in the feeding direction. Conversely, if the pitch between stages is less than twice that distance, the discharge port 31a is positioned in the center of the feeding direction between stages.

[0053] The control unit 15 consists of an information processing device having a processor and memory, and controls each part of the manufacturing apparatus 1. This control realizes the manufacturing method of the core 3 in this embodiment. Note that the control unit 15 may be a combination of multiple information processing devices, not just a single information processing device.

[0054] [Method for manufacturing laminates] The manufacturing method of the laminate in this embodiment includes a method for applying adhesive 27. First, a steel sheet 5 having an application area 29 to which adhesive 27 is applied, as shown in Figures 1 to 3, is supplied to the mold device 11. During the supply of the steel sheet 5, the feeding and stopping of the steel sheet 5 is repeated.

[0055] Within the mold apparatus 11, the inner circumference of the core piece 7 is punched out, the adhesive 27 is applied, and the outer circumference of the core piece 7 is punched out sequentially in accordance with the feeding and stopping of the steel plate 5.

[0056] Specifically, the portion of the steel plate 5 that will become the core piece 7, shown at the left end of Figure 2, is fed by the feed of the steel plate 5 to the inner circumference punching stage between the first punch 21a and the first lower die 19a of the upper die 17 shown in Figure 1. While the steel plate 5 is stopped at the inner circumference punching stage, the inner circumference that will become the core piece 7 is punched out by the first punch 21a. The portion of the steel plate 5 that will become the core piece 7, with its inner circumference punched out, is then supplied to the adhesive application stage in accordance with the feed of the steel plate 5.

[0057] In the adhesive application stage, adhesive 27 is applied while the steel plate 5 is being fed, according to the position of the discharge port 31a of the discharge device 13. When applying adhesive 27, the discharge port 31a is initially positioned adjacent to another in the discharge area 35, as shown in Figure 3. In this state, the discharge port 31a is positioned at the application location 37 on the downstream end in the feeding direction as the steel plate 5 is fed, and the adhesive 27 is discharged.

[0058] After the adhesive 27 is dispensed, the steel plate 5 is fed while the dispensing ports 31a are moved in the opposite direction outward in the intersecting direction so that they move away from each other. Then, the dispensing ports 31a are folded back at both ends of the dispensing area 35 in the intersecting direction and moved in the opposite direction inward in the intersecting direction so that they move closer to each other.

[0059] Therefore, the discharge port 31a moves relative to the coating area 29 in a circular motion. During this movement, the discharge port 31a discharges the adhesive 27 each time it is positioned at a coating location 37. As a result, in this embodiment, the adhesive 27 is applied in a circular dot pattern to multiple coating locations 37 in the coating area 29.

[0060] In the application of the adhesive 27, when the feed speed of the steel plate 5 is relatively low, the discharge port 31a moves between relatively close application points 37 in the feed direction. In other words, the feed speed of the steel plate 5 becomes relatively low on both sides of the application area 29 in the feed direction, and the adhesive 27 is applied.

[0061] This ensures that the discharge port 31a has sufficient travel time and the adhesive 27 has sufficient discharge time for the adhesive 27 to be applied to the application points 37 on both sides of the feed direction of the application area 29.

[0062] The portion of the core piece 7 to which the adhesive 27 has been applied is fed by the steel plate 5 to the outer peripheral punching stage between the second punch 21b of the upper die 17 and the die 25 of the second lower die 19b shown in Figure 1. The outer circumference of the core piece 7 is then cut by the second punch 21b, and the core piece 7 is punched out from the steel plate 5. The adhesive application stage may be placed at any position upstream of the outer peripheral punching stage.

[0063] As shown in Figure 1, the punched core pieces 7 are held in the die 25 of the second lower die 19b and are laminated on top of the core pieces 7 held in the die 25 that were punched earlier, with adhesive 27 interposed. Similarly, by performing a series of operations such as punching out the inner circumference, applying adhesive 27, punching out the core pieces 7, and holding them, multiple core pieces 7 can be laminated to obtain a core 3.

[0064] As described above, in the adhesive application method and application apparatus 28 of this embodiment, a steel plate 5, which is a plate material having an application area 29 to which the adhesive 27 is applied, is fed, and the discharge port 31a of the adhesive 27 is moved in a direction intersecting the feeding direction within a discharge area 35 that is smaller than the application area 29 in the feeding direction of the steel plate 5. Then, the adhesive 27 is discharged from the discharge port 31a that is moving in the intersecting direction within the discharge area 35 and applied to the application area 29 of the steel plate 5 that is being fed in the feeding direction.

[0065] Therefore, by moving the discharge port 31a in a cross direction in accordance with the feeding of the steel plate 5, the adhesive 27 can be applied to the application area 29, and the space required for the movement of the discharge port 31a (the space for applying the adhesive 27) can be made smaller than the application area 29, which is the area to which the adhesive 27 is applied. In addition, the number of discharge ports 31a can be less than the number of application locations 37. Furthermore, by controlling the feeding of the steel plate 5 and the movement of the discharge port 31a, the adhesive 27 can be applied to the application locations 37 in a desired arrangement shape, thereby improving the degree of freedom of the application locations 37.

[0066] Furthermore, in this embodiment, the adhesive 27 is applied in a circular dot pattern to multiple application locations 37 within the application area 29, thereby ensuring the bonding strength between the core pieces 7 that are to be joined.

[0067] The discharge ports 31a are provided on one side and the other side in the width direction perpendicular to the feeding direction of the coating area 29, and the discharge ports 31a on one side and the other side of the coating area 29 move in opposite directions in the intersecting direction.

[0068] Therefore, the adhesive 27 can be efficiently applied in a circular dot pattern.

[0069] Furthermore, in this embodiment, the steel plate 5 is fed while changing speed, and the discharge port 31a moves between coating locations 37 that are relatively close in the feeding direction when the feeding speed of the steel plate 5 is relatively low.

[0070] Therefore, in this embodiment, even for coating locations 37 that are relatively close in the feeding direction, the movement time of the discharge port 31a and the discharge time of the adhesive 27 can be ensured, allowing for reliable dot application of the adhesive 27 in an annular pattern. As a result, the coating locations 37 can be evenly distributed, improving the bonding strength between the core pieces 7. Furthermore, the number of coating locations 37 can also be increased to improve the bonding strength between the core pieces 7.

[0071] [Differentiation] Figure 6 is a schematic plan view showing the discharge port and coating area of ​​the discharge device used in the manufacturing apparatus according to a modified example of Example 1.

[0072] In the modified example shown in Figure 6, the discharge port 31a is provided with a first discharge port 31Aa and a second discharge port 31Ba on one side and the other side in the width direction of the coating area 29. Although not shown, the first discharge port 31Aa and the second discharge port 31Ba are provided in separate discharge units.

[0073] The first discharge port 31Aa and the second discharge port 31Ba alternately discharge the adhesive 27 to at least the relatively close application locations 37 in the feeding direction. In this modified example, the first discharge port 31Aa and the second discharge port 31Ba alternately discharge the adhesive 27 to all of the multiple application locations 37.

[0074] Specifically, in the initial position, the first discharge port 31Aa and the second discharge port 31Ba are arranged adjacent to each other in an intersecting direction at positions corresponding to the coating area 37 and the adjacent coating area 37, respectively, at a position near 0 degrees.

[0075] The first discharge port 31Aa applies adhesive 27 to the application area 37 near 0 degrees in its initial position, and then moves outward in the intersecting direction. Meanwhile, the second discharge port 31Ba applies adhesive 27 to the application area 37 adjacent to the application area 37 near 0 degrees in its initial position, and then moves outward in the intersecting direction.

[0076] Next, the first discharge port 31Aa moves to an application area 37 adjacent to the application area 37 to which the adhesive 27 has been applied by the second discharge port 31Ba, and applies the adhesive 27. Similarly, the second discharge port 31Ba moves to an application area 37 adjacent to the application area 37 to which the adhesive 27 has been applied by the first discharge port 31Aa, and applies the adhesive 27.

[0077] In this manner, the first discharge port 31Aa and the second discharge port 31Ba move in opposite directions toward the inside of the intersecting direction, folding back at the outer ends of the intersecting directions of the discharge regions 35A and 35B, respectively, as they apply the adhesive 27 to the application area 37, and approaching each other.

[0078] In this way, the first and second discharge ports 31Aa and 31Ba each apply the adhesive 27 to half of all application locations 37. Therefore, in this modified example, the application interval of the adhesive 27 from the first and second discharge ports 31Aa and 31Ba is increased, so that the adhesive 27 can be reliably applied to all application locations 37, including those that are relatively close in the feeding direction.

[0079] During this application process, the first discharge port 31Aa may start moving by utilizing the application time of the adhesive 27 to the application area 37 adjacent to the application area 37 near 0 degrees. In this case, the adhesive 27 can be reliably applied to all application areas 37, including those that are relatively close in the feeding direction.

[0080] Figure 7 is a schematic plan view showing the discharge port and coating area of ​​a dispensing device used in a manufacturing apparatus according to another modification of Example 1.

[0081] In the modified example shown in Figure 7, the first discharge port 31Aa and the second discharge port 31Ba are initially positioned at separate locations in the intersecting direction and move in opposite directions. Specifically, the first discharge port 31Aa and the second discharge port 31Ba are positioned at locations corresponding to the coating area 37 near 0 degrees and the coating area 37 near 90 degrees, respectively, in their initial positions.

[0082] The first discharge port 31Aa applies adhesive 27 to an application area 37 near 0 degrees in its initial position, and then sequentially applies adhesive 27 to multiple application areas 37 while moving outward in the intersecting direction until it reaches an application area 37 near 90 degrees. On the other hand, the second discharge port 31Ba applies adhesive 27 to an application area 37 near 90 degrees in its initial position, and then sequentially applies adhesive 27 to multiple application areas 37 while moving inward in the intersecting direction until it reaches an application area near 180 degrees.

[0083] The first discharge port 31Aa can return to its initial position when the adhesive 27 is applied by the second discharge port 31Ba. The second discharge port 31Ba can return to its initial position when the adhesive 27 is applied again by the first discharge port 31Aa.

[0084] In this modified configuration, the first discharge port 31Aa and the second discharge port 31Ba can be smoothly returned to their initial positions. Alternatively, the first discharge port 31Aa and the second discharge port 31Ba may be reversed in their initial positions for the next coating area 29 without returning to their initial positions. In this case, since the widthwise movement direction of the first discharge port 31Aa and the second discharge port 31Ba does not reverse during continuous operation, vibrations, movement problems, or scattering of adhesive caused by inertial forces that occur when their movement directions are reversed during continuous operation are suppressed. Therefore, the adhesive 27 can be reliably applied to the coating area 37.

[0085] Furthermore, the same effects and advantages as in Example 1 can be achieved in the modified examples shown in Figures 6 and 7. [Examples]

[0086] Figure 8 is a schematic plan view showing the discharge port and coating area of ​​the discharge device used in the manufacturing apparatus according to Embodiment 2 of the present invention. Since Embodiment 2 has the same basic configuration as Embodiment 1, the same reference numerals are used for the components corresponding to Embodiment 1, and redundant explanations are omitted. For the overall configuration of Embodiment 2, please refer to Figure 1.

[0087] In this embodiment, the intersecting direction is inclined in the feeding direction, and the discharge port 31a is moved downstream in the feeding direction along the intersecting direction while moving between relatively close coating locations 37 in the feeding direction.

[0088] The discharge port 31a, similar to the modified example in Figure 6 of Embodiment 1, is provided with a first discharge port 31Aa and a second discharge port 31Ba on one side and the other side in the width direction of the coating area 29. The movement directions of the first discharge port 31Aa and the second discharge port 31Ba are inverted with respect to the feeding direction.

[0089] Specifically, the direction in which the first discharge port 31Aa moves transitions from a position corresponding to the coating location 37 at approximately 0 degrees downstream in the feeding direction to a position corresponding to the coating location 37 at approximately 90 degrees. The direction in which the second discharge port 31Ba moves transitions from a position corresponding to the coating location 37 at approximately 0 degrees upstream in the feeding direction to a position corresponding to the coating location 37 at approximately 90 degrees.

[0090] These first discharge ports 31Aa and second discharge ports 31Ba are initially positioned at separate locations in the width direction and move in opposite directions in the width direction. Specifically, the first discharge port 31Aa and second discharge port 31Ba are initially positioned at locations corresponding to the coating area 37 near 0 degrees and the coating area 37 near 90 degrees, respectively.

[0091] The first discharge port 31Aa first applies the adhesive 27 to the application area 37 near 0 degrees in its initial position, and then moves in a crossing direction toward the outside in the width direction, sequentially applying the adhesive 27 to multiple application areas 37 up to the application area 37 near 90 degrees.

[0092] At this time, the first discharge port 31Aa moves downstream in the feeding direction along the intersecting direction, while moving between relatively close coating locations 37 in the feeding direction. Therefore, the distance between coating locations 37 in the feeding direction is substantially extended by the amount that the first discharge port 31Aa moves downstream in the feeding direction. As a result, the first discharge port 31Aa can reliably apply the adhesive 27 to all coating locations 37, including those that are relatively close in the feeding direction.

[0093] The second discharge port 31Ba first applies the adhesive 27 to the application area 37 at approximately 90 degrees in its initial position, and then sequentially applies the adhesive 27 to multiple application areas 37 up to the application area 37 at approximately 180 degrees while moving inward in the width direction in a cross direction.

[0094] At this time, the second discharge port 31Ba moves downstream in the feeding direction along the intersecting direction, while moving between relatively close coating locations 37 in the feeding direction. Therefore, the distance between coating locations 37 in the feeding direction is substantially extended by the amount that the second discharge port 31Ba moves downstream in the feeding direction. As a result, the second discharge port 31Ba can reliably apply the adhesive 27 to all coating locations 37, including those that are relatively close in the feeding direction.

[0095] Therefore, in this embodiment, the adhesive 27 can be reliably applied to all application locations 37, including those that are relatively close in the feeding direction, by using the first and second discharge ports 31Aa and 31Ba.

[0096] After the adhesive 27 is applied, the first discharge port 31Aa can return to its initial position when the adhesive 27 is applied by the second discharge port 31Ba, and the second discharge port 31Ba can return to its initial position when the adhesive 27 is applied again by the first discharge port 31Aa. Therefore, the application of the adhesive 27 to the next application area 29 can be carried out smoothly.

[0097] Furthermore, this embodiment can achieve the same effects as in Embodiment 1. In this embodiment, for example, if the target of adhesive application 27 is a stator, one of the first discharge port 31Aa and the second discharge port 31Ba can apply the adhesive 27 in an annular shape while the other discharge port applies the adhesive 27 to the teeth. This is also true for the modified example shown in Figure 7 of Embodiment 1. [Examples]

[0098] Figure 9 is a schematic plan view showing a feeding device used in a manufacturing apparatus according to Embodiment 3 of the present invention. Since Embodiment 3 shares the same basic configuration as Embodiment 1, corresponding components are indicated by the same reference numerals, and redundant explanations are omitted. For the overall configuration of Embodiment 3, please refer to Figure 1.

[0099] In this embodiment, the feeding device 9 is configured as a conveyor. This feeding device 9 is a belt conveyor equipped with a belt 39 on which the punched core pieces 7, which are the sheet material in this embodiment, are placed, and the core pieces 7 are fed by the movement of the belt 39. Note that the feeding device 9 may also be configured as another type of conveyor, such as a roller conveyor.

[0100] The dispensing device 13 applies adhesive 27 to the coating area 29 of the core piece 7 being fed on the feeder 9. The configuration of the dispensing device 13 can be appropriately selected from Example 1 and its modifications, as well as Example 2.

[0101] This third example can also achieve the same effects as the first example.

[0102] [Differentiation] Figure 10 is a schematic plan view showing a feeding device used in a manufacturing apparatus according to a modified example of Example 3.

[0103] In the modified example shown in Figure 10, the feeding device 9 is configured using a robot. Specifically, the feeding device 9 has two arms 41 and transports the core piece 7 held between the arms 41. During this transport, the dispensing device 13 applies adhesive 27 to the coating area 29 of the core piece 7. The configuration of the dispensing device 13 can be appropriately selected from Example 1 and its modified examples and Example 2.

[0104] In this modified example, the same effects and advantages as in Example 3 can be achieved. [Explanation of symbols]

[0105] 5 Steel plate (plate material) 7. Core pieces (board material) 9. Feed device 13 Discharge device 27 Adhesives 29 Application area 31 Discharge part 31a Discharge port 31Aa 1st discharge port 31Ba 2nd outlet 33 Drive unit 35 Discharge area 37 Application sites

Claims

1. A plate material having an adhesive application area is fed, The adhesive discharge port is moved in a direction intersecting the feeding direction within a discharge area that is smaller than the coating area in the feeding direction of the plate material. The adhesive is dispensed from the discharge port, which moves in the intersecting direction within the discharge area, and applied to the coating area of ​​the plate material being fed in the feeding direction. Method of applying adhesive.

2. A method for applying the adhesive according to claim 1, The adhesive is applied in a circular dot pattern to multiple application locations within the application area. Method of applying adhesive.

3. A method for applying the adhesive according to claim 2, The discharge ports are provided on one side and the other side of the coating area in a direction perpendicular to the feeding direction, respectively. The discharge ports on one side and the other side of the coating area move in opposite directions in the intersecting direction. Method of applying adhesive.

4. A method for applying the adhesive according to claim 3, The discharge port comprises a first discharge port and a second discharge port on each of the one and the other sides of the coating area in the orthogonal direction, and the first discharge port and the second discharge port alternately discharge the adhesive to at least the coating locations that are relatively close in the feeding direction. Method of applying adhesive.

5. A method for applying the adhesive according to claim 3, The aforementioned intersection direction coincides with the aforementioned orthogonal direction. The aforementioned plate material is fed while changing its speed. The discharge port moves between the coating locations that are relatively close in the feeding direction when the feeding speed of the plate material is relatively low. Method of applying adhesive.

6. A method for applying the adhesive according to claim 3, The aforementioned intersection direction is inclined in the feed direction, The discharge port moves downstream in the feeding direction along the intersecting direction, while moving between the relatively close coating locations in the feeding direction. Method of applying adhesive.

7. A feeding device for feeding a plate material having an adhesive application area, The discharge port for dispensing the adhesive, The system includes a drive unit that moves the discharge port in a direction intersecting the feeding direction within a discharge area that is smaller than the coating area in the feeding direction of the plate material, The adhesive is dispensed from the discharge port, which moves in the intersecting direction within the discharge area, and applied to the coating area of ​​the plate material being fed in the feeding direction. Adhesive application device.

8. An adhesive application apparatus according to claim 7, The adhesive is applied in a circular dot pattern to multiple application locations in the application area. Adhesive application device.

9. An adhesive application apparatus according to claim 8, The discharge ports are provided on one side and the other side of the coating area in a direction perpendicular to the feeding direction, respectively. The drive unit moves the discharge ports on one side and the other side in opposite directions in the intersecting direction. Adhesive application device.

10. An adhesive application apparatus according to claim 9, The discharge port comprises a first discharge port and a second discharge port on each of the two sides of the coating area in the orthogonal direction. The first discharge port and the second discharge port alternately discharge the adhesive to the application locations that are at least relatively close in the feeding direction. Adhesive application device.

11. An adhesive application apparatus according to claim 9, The aforementioned intersection direction coincides with the aforementioned orthogonal direction. The feeding device feeds the plate material while changing its speed. The drive unit moves the plate material between the coating locations that are relatively close in the feeding direction to the discharge port when the feeding speed of the plate material is relatively low. Adhesive application device.

12. An adhesive application apparatus according to claim 9, The aforementioned intersection direction is inclined in the feed direction, The drive unit moves the discharge port downstream in the feeding direction along the intersecting direction, while moving the discharge port between the relatively close coating locations in the feeding direction. Adhesive application device.

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