Manufacturing device of laminated core and manufacturing method of laminated core

Abstract

A manufacturing apparatus of a laminated core includes: an upper die and a lower die that punch a steel sheet member by punching a band-shaped steel sheet sent downstream; a laminating section that is provided to the lower die, and laminates the punched steel sheet member with an adhesive; and an application section that is provided to the lower die or the upper die at an upstream side of the laminating section with respect to a sending direction of the band-shaped steel sheet, and applies the adhesive to one surface of the band-shaped steel sheet, the application section having a plurality of discharge port sections that continuously discharge the adhesive, each of the discharge port sections being made of a non-metallic material.

Description

Technical Field

[0001] This disclosure relates to an apparatus for manufacturing a laminated iron core and a method for manufacturing a laminated iron core. Background Technology

[0002] A method is known in which a strip of steel sheet is stamped to cut steel sheet parts, and the cut steel sheet parts are bonded together with an adhesive to manufacture a laminated iron core (e.g., see Japanese Patent Application Publication No. 2017-216873, Japanese Patent No. 5375264, Japanese Patent No. 6515241, and Japanese Patent No. 7138899). Summary of the Invention

[0003] Furthermore, anaerobic adhesives are used for bonding the punched steel sheet components together. These anaerobic adhesives exhibit a high degree of curing reaction with metal, and the curing reaction proceeds gradually even without the addition of curing accelerators. Therefore, when applying the anaerobic adhesive using a metal nozzle, the adhesive cures easily within the nozzle. As the anaerobic adhesive cures, its flowability decreases, or it may clog the nozzle. Consequently, it is difficult to apply an appropriate amount of anaerobic adhesive to the strip steel sheet from the punched steel components.

[0004] The subject of this disclosure is to provide a technique for applying an appropriate amount of adhesive to a strip of steel.

[0005] Technical means for solving technical problems

[0006] A manufacturing apparatus for a laminated iron core according to one embodiment of the present disclosure includes: an upper die and a lower die for punching steel plate components by pressing a strip of steel sheet fed downstream; a lamination section disposed on the lower die for bonding and laminating the punched steel plate components with an adhesive; and a coating section disposed on the lower die or the upper die upstream of the lamination section in the feeding direction of the strip of steel sheet for coating an adhesive on one side of the strip of steel sheet, the coating section having a plurality of outlets for continuously discharging the adhesive, the portion constituting each outlet being made of a non-metallic material.

[0007] Another aspect of this disclosure describes a method for manufacturing a laminated core. The method involves feeding the strip steel sheet into an upper and lower die that punches the strip steel sheet to cut steel plate components. Adhesive is continuously discharged from multiple outlets made of non-metallic material in the coating section of the lower or upper die to coat one side of the strip steel sheet. The steel plate components punched from the strip steel sheet by the upper and lower dies are then laminated using the adhesive.

[0008] Invention Effects

[0009] According to this disclosure, an appropriate amount of adhesive can be applied to a strip of steel. Attached Figure Description

[0010] Figure 1 This is a perspective view of a laminated iron core manufactured by the manufacturing apparatus described in the embodiment.

[0011] Figure 2 This is a schematic side view of the manufacturing apparatus according to the embodiment.

[0012] Figure 3 This is a top view of the coating head.

[0013] Figure 4 This is a side view of the coating head.

[0014] Figure 5 This is a cross-sectional view of the coating head.

[0015] Figure 6A Therefore Figure 5 A magnified view of the portion indicated by arrow 6X.

[0016] Figure 6B This is an enlarged view showing the state of adhesive coating on a strip of steel (and...). Figure 6A (Corresponding enlarged image).

[0017] Figure 7A This is an enlarged view of the discharge port surrounding the coating head in other embodiments (and...). Figure 6A (Corresponding sectional view).

[0018] Figure 7B This is an enlarged view showing the state of adhesive coating on a strip of steel (and...). Figure 7A (Corresponding enlarged image).

[0019] Figure 8 This is an enlarged view of the discharge port surrounding the coating head in other embodiments (and...). Figure 6A (Corresponding sectional view). Detailed Implementation

[0020] Hereinafter, the methods for implementing the technology of this disclosure will be described based on the accompanying drawings. In the drawings, elements indicated by the same reference numerals are considered to be the same or identical elements. Furthermore, descriptions and reference numerals repeated in the embodiments described below may sometimes be omitted. In addition, the drawings used in the following description are schematic, and the dimensional relationships and scales of the elements shown in the drawings may not necessarily correspond to reality. Furthermore, the dimensional relationships and scales of the elements may not be consistent between multiple drawings.

[0021] First, the manufacturing apparatus for the laminated iron core according to this embodiment will be described, and then the manufacturing method for the laminated iron core according to this embodiment will be described. Furthermore, the laminated iron core 20 manufactured using the manufacturing apparatus and method of this embodiment is used, for example, to constitute the stator or rotor core of a rotating electric machine. This rotating electric machine is, for example, an electric motor. As an electric motor, it can also be an AC motor, a synchronous motor, or a permanent magnet excitation type motor. Such an electric motor is preferably used, for example, in electric vehicles. Furthermore, in this embodiment, as... Figure 1 As shown, the laminated iron core 20 is described as a stator using a bonded laminated iron core. The laminated iron core 20 has: an annular iron core back 24; and a plurality of teeth 26 extending radially inward from the iron core back 24.

[0022] [Fabrication apparatus 30 for laminated iron core]

[0023] like Figure 2 As shown, the manufacturing apparatus 30 for the laminated iron core in this embodiment (hereinafter referred to as "manufacturing apparatus 30") is an apparatus that punches steel plate parts 22 by stamping a strip of steel plate M, bonds the punched steel plate parts 22 with an adhesive, and stacks them to manufacture a laminated iron core 20. Furthermore, Figure 2 The arrow UP in the middle points upwards.

[0024] The manufacturing apparatus 30 includes a feeding section 40, an oil coating section 50, a stamping section 60, an adhesive coating section 70, and a lamination section 80. Furthermore, the manufacturing apparatus 30 includes a fixed mold 90 and a movable mold 92. The fixed mold 90 is located on the lower side in the vertical direction and is therefore also called the lower mold. The movable mold 92 is located on the upper side in the vertical direction and is therefore also called the upper mold. The movable mold 92 moves relative to the fixed mold 90 in the vertical direction due to a drive mechanism (not shown).

[0025] The feeding section 40 is the part of the manufacturing apparatus 30 that feeds out the strip steel sheet M, which is the material for the steel sheet component 22. Specifically, the feeding section 40 winds out the strip steel sheet M from the wound steel coil material F and feeds it out. More specifically, the feeding section 40 includes a steel coil feeding device 42. The strip steel sheet M is wound out from the steel coil material F and fed out by this steel coil feeding device 42. The steel coil feeding device 42 includes, for example, a pair of clamping rollers 44. The strip steel sheet M is clamped and fed out from both sides by the pair of clamping rollers 44. In addition, the strip steel sheet M is fed out from the feeding section 40 to the oil coating section 50, the stamping section 60, the adhesive coating section 70, and the lamination section 80. The direction in which the strip steel sheet M is fed out is called the feeding direction, which is shown by reference numeral C in the figure. Additionally, in the following context, "downstream" or "downstream side" refers to the downstream or downstream side of the strip steel plate M in the direction of delivery. Furthermore, "upstream" or "upstream side" refers to the upstream or upstream side of the strip steel plate M in the direction of delivery.

[0026] The strip steel sheet M is, for example, an electromagnetic steel sheet. Known electromagnetic steel sheets can also be used. For example, both non-oriented and non-oriented electromagnetic steel sheets can be used. Non-oriented electromagnetic steel strips according to JISC 2552:2014 can also be used as non-oriented electromagnetic steel sheets. Oriented electromagnetic steel strips according to JISC 2553:2012 can also be used as oriented electromagnetic steel sheets. Furthermore, both sides of the strip steel sheet M can be covered with an insulating film.

[0027] The oil coating section 50 is the part of the manufacturing apparatus 30 that applies oil to the strip steel sheet M, which is the material of the steel sheet component 22. The oil coating section 50 includes, for example, a plurality of nozzles 52 that spray oil onto one side of the strip steel sheet M and coat it. Oil is supplied to each nozzle 52 from an oil supply source (not shown). Furthermore, in this embodiment, the oil coating section 50 applies processing oil for stamping to the strip steel sheet M. In addition, each nozzle 52 in this embodiment applies oil downwards. Therefore, oil is applied to the upper surface of the strip steel sheet M. Furthermore, oil is applied throughout the entire width direction of the strip steel sheet M.

[0028] The stamping section 60 is a part of the manufacturing apparatus 30 that performs stamping processing on the strip steel sheet M. The stamping section 60 includes a first-stage stamping section 62 and a second-stage stamping section 64.

[0029] The first-stage punching section 62 is located downstream of the oil coating section 50 and has a male die 62a and a female die 62b.

[0030] The male mold 62a and the female mold 62b are coaxially arranged along the vertical direction. The strip steel plate M passes between the male mold 62a and the female mold 62b. That is, during the manufacture of the laminated iron core 20, the male mold 62a is opposite to the upper surface of the strip steel plate M, and the female mold 62b is opposite to the lower surface of the strip steel plate M.

[0031] In this embodiment, a female mold 62b is fixed to the upper surface of the fixed mold 90, and a male mold 62a is fixed to the lower surface of the movable mold 92. Therefore, by moving the movable mold 92 relative to the fixed mold 90 in the vertical direction, the male mold 62a will enter the female mold 62b.

[0032] With the feeding of the strip steel sheet M temporarily stopped, the male die 62a is moved downwards into the female die 62b, thereby performing the first punching process required to form the steel plate component 22 in the strip steel sheet M. At this time, oil is applied to the upper surface of the strip steel sheet M, so the punching process can be performed without burning or other damage. After this punching process, the male die 62a is moved upwards and pulled from the female die 62b, and the strip steel sheet M is fed downstream.

[0033] The second-stage punching section 64 is located downstream of the first-stage punching section 62 and has a male die 64a and a female die 64b.

[0034] In this embodiment, a female mold 64b is fixed to the upper surface of the fixed mold 90, and a male mold 64a is fixed to the lower surface of the movable mold 92. Therefore, when the movable mold 92 moves vertically relative to the fixed mold 90, the male mold 64a will enter the female mold 64b.

[0035] The male die 64a and the female die 64b are coaxially arranged along the vertical direction. The strip steel plate M, after the first punching process, passes between the male die 64a and the female die 64b. That is, the male die 64a is opposite to the upper surface of the strip steel plate M, and the female die 64b is opposite to the lower surface of the strip steel plate M.

[0036] With the feeding of the strip steel sheet M temporarily stopped again, the male die 64a is moved downwards into the female die 64b via a hydraulic mechanism (not shown), thereby performing the second punching process required to form the steel sheet component 22 in the strip steel sheet M. At this time, oil is applied to the upper surface of the strip steel sheet M, so the punching process can be performed without burning or other damage. After this punching process, the male die 64a is moved upwards and pulled from the female die 64b, and the strip steel sheet M is fed downstream.

[0037] Multiple stator teeth 26 are formed on the strip steel plate M through the first-stage punching section 62 and the second-stage punching section 64. In addition, the multiple teeth 26 are the parts in which the windings constituting the stator are concentratedly wound or distributedly wound.

[0038] The adhesive coating section 70 is a part of the manufacturing apparatus 30 that has the function of coating adhesive on one side of the strip steel plate M. The adhesive coating section 70 includes an adhesive supply device 72, a supply path 74, a coating head 76, and a steel plate pressing block 71.

[0039] The adhesive supply device 72 is a device that supplies adhesive from an adhesive container (not shown) to a coating head 76. An anaerobic adhesive is used, for example, as the adhesive for bonding the steel plate parts 22 together. For example, "Arontite" (trademark registered) manufactured by Toa Synthetic Co., Ltd. can also be used as an anaerobic adhesive. Furthermore, the adhesive supply device 72 can be installed on the fixed mold 90 or in a location different from the fixed mold 90. Similarly, the adhesive container can be installed on the fixed mold 90 or in a location different from the fixed mold 90.

[0040] Supply path 74 is a flow path for supplying adhesive from the aforementioned adhesive container to the coating head 76. Supply path 74 is made of, for example, a non-metallic material. Specifically, supply path 74 is a pipe made of resin material, i.e., a resin pipe.

[0041] The coating head 76 is installed at the front end of the supply path 74 and is used to apply adhesive to one side of the strip steel plate M. This coating head 76 is housed in a concave receiving portion 91, which is provided on the upper surface of the fixing mold 90. Furthermore, the coating head 76 of this embodiment is an example of the coating section in this disclosure. Figures 3 to 6A and Figure 6B Arrow A in the diagram indicates the flow of adhesive.

[0042] Coating head 76 Figure 3 As shown, the adhesive supply device 72 has multiple outlets 77 for discharging adhesive. The adhesive supply device 72 is configured to continuously discharge adhesive from the multiple outlets 77. Therefore, adhesive is continuously discharged from the multiple outlets 77. Furthermore, the phrase "continuously discharging adhesive from the outlets 77" includes continuously discharging adhesive from the outlets 77 from the point where the adhesive is applied to the strip steel plate M by the adhesive supply device 72, at least until the next adhesive application point.

[0043] In addition, such as Figure 4 As shown, each outlet 77 faces upwards. That is, during the manufacturing of the laminated iron core 20, each outlet 77 is opposite to the lower surface of the strip steel plate M. In this embodiment, as... Figure 6BAs shown, with the adhesive protruding from the outlet 77 (in other words, with the adhesive protruding upward from the outlet 77), the outlet 77 is brought close to the strip steel plate M in such a way that a gap remains between the outlet 77 and the strip steel plate M, and the adhesive is applied to the lower surface of the strip steel plate M.

[0044] Regarding the coating head 76, the portions constituting each outlet 77 are made of non-metallic material. Furthermore, the portions constituting the outlets 77 in the coating head 76 include an inner wall surface 77a constituting the outlet 77 and a peripheral portion 77b of the outlet 77.

[0045] In addition, coating head 76 such Figure 4 As shown, the coating head 76 has a reservoir 78 for storing adhesive supplied from the outside. Specifically, a resin tube constituting a supply path 74 is connected to the connection port of the coating head 76, and the supply path 74 communicates with the reservoir 78. The reservoir 78 communicates with each discharge port 77. Therefore, the adhesive delivered through the supply path 74 is discharged from each discharge port 77 via the reservoir 78. Furthermore, regarding the coating head 76, the portion constituting the reservoir 78 is made of a non-metallic material.

[0046] Additionally, the portion constituting the reservoir 78 in the coating head 76 includes: an inner wall surface 78a, which constitutes the reservoir 78; and an inner wall surface 78b of the flow path portion, which connects the reservoir 78 to the outlet 77.

[0047] Furthermore, the reservoir 78 is the part that stores the adhesive, so it will not form a part with a diameter smaller than the outlet 77.

[0048] In this embodiment, the coating head 76 coats the surface (on...) Figure 4 The upper surface (of which the protrusion 79 is located) has an annular protrusion 79 projecting from it. For example, the protrusion 79 is annular. The protrusion 79 is provided as a flat surface with its top circumferentially flat (hereinafter appropriately referred to as "top surface 79a"). On the top surface 79a of the protrusion 79, a plurality of outlets 77 are formed at intervals along the circumference of the protrusion 79. Furthermore, in this embodiment, the top of the protrusion 79 is a flat surface, thus forming a plurality of outlets 77 on the flat surface; however, in the case where the top of the protrusion 79 is a curved surface that appears arc-shaped in cross-section, the outlets 77 are formed at the apex of the curved surface.

[0049] Furthermore, in this embodiment, the coating head 76 is entirely made of non-metallic material.

[0050] The non-metallic material constituting the coating head 76 is, for example, a resin material. Specifically, it is an organic resin material. Furthermore, in this disclosure, the die-cutting process is performed continuously. Therefore, for the coating head 76 to obtain the necessary sufficient mechanical strength, heat resistance that does not deform at 120°C is required. As such a resin material, polyacetal resin, polyethylene resin, polypropylene resin, polyetheretherketone resin, or polytetrafluoroethylene resin is preferably used.

[0051] A steel plate pressure block 71 is positioned above the coating head 76. During the manufacturing of the laminated iron core 20, the steel plate pressure block 71 faces the upper surface of the strip steel plate M. That is, the steel plate pressure block 71 is positioned on the lower surface of the movable mold 92. When the feeding of the strip steel plate M is temporarily stopped, the steel plate pressure block 71 is pressed downwards by a hydraulic mechanism (not shown), thus pressing the strip steel plate M downwards. This allows the steel plate pressure block 71 to press the height of the strip steel plate M to the adhesive coating position of the coating head 76 and position it. In this positioned state, the lower surface of the strip steel plate M is close to each discharge port 77 of the coating head 76.

[0052] Then, in the positioned state based on the steel plate pressure block 71, when the adhesive supply device 72 is activated to supply an appropriate amount of air to the adhesive container, the adhesive in the adhesive container is sent to the coating head 76. As a result, an appropriate amount of adhesive is discharged from each outlet 77 of the coating head 76 and coated onto the lower surface of the strip steel plate M. Then, by raising the steel plate pressure block 71, the height position of the strip steel plate M is restored to its original height.

[0053] The lamination section 80 is a part in the manufacturing apparatus 30 where steel sheet parts 22 that have been punched out are laminated together using an adhesive. It is located downstream of the adhesive application section 70. The lamination section 80 includes an outer peripheral punching male die 82, an outer peripheral punching female die 84, a spring 86, and a heater 88.

[0054] The outer peripheral punching male die 82 is a cylindrical die with a circular bottom surface, and the lower end of a spring 86 is connected to its upper end. Furthermore, the outer peripheral punching male die 82 is configured to move up and down together with the spring 86 while being supported by the spring 86. The outer peripheral punching male die 82 has an outer diameter that is approximately the same as the outer diameter of the stacked iron core 20.

[0055] The peripheral punching die 84 is a die with a cylindrical internal space and an inner diameter that is approximately the same as the outer diameter of the stacked iron core 20.

[0056] The heater 88 is integrally assembled with the outer peripheral punching die 84. The heater 88 heats the steel plate component 22 from its surroundings, which is stacked within the outer peripheral punching die 84. When a heat-curing adhesive is used, it cures under the heat from the heater 88. On the other hand, when a room-temperature curing adhesive is used, it cures at room temperature without heating. Furthermore, when a room-temperature curing adhesive is used, the heater 88 can be omitted.

[0057] According to the stacking section 80, while the feeding of the strip steel plate M is temporarily stopped, the outer peripheral punching male die 82 is lowered to clamp the strip steel plate M between the outer peripheral punching female die 84. Then, the outer peripheral punching male die 82 is pressed into the outer peripheral punching female die 84, thereby obtaining the steel plate component 22 that has undergone peripheral punching from the strip steel plate M.

[0058] The steel plate component 22, punched from the strip steel sheet M, is stacked onto the upper surface of other steel plate components 22 that have been punched and stacked within the outer peripheral punching female die 84 and bonded together. Then, it is subjected to pressure from the outer peripheral punching male die 82 and heating from the heater 88. At this time, the pressure applied to the steel plate component 22 from the outer peripheral punching male die 82 is maintained constant by the force of the spring 86. Alternatively, the spring 86 can be omitted by appropriately setting the height position of the male die 82.

[0059] In the above manner, the steel plate component 22 punched out this time is bonded to the upper surface of the steel plate component 22 punched out previously. By repeating the process of peripheral punching, pressurizing, and then heating the number of times each steel plate component 22 is stacked, a stacked iron core 20 is formed in the peripheral punching die 84. The fixed stacked iron core 20 is opened through a through hole formed in the fixed die 90 (in Figure 2 (The contents are omitted) are moved to the bottom of the mold and discharged outside the mold.

[0060] like Figure 2 As shown, the female mold 64b, the coating head 76, the peripheral punching female mold 84, and the heater 88 are fixed on the fixed mold 90.

[0061] The male mold 64a, the steel plate pressure block 71, and the outer peripheral punching male mold 82 are fixed to the lower surface of the movable mold 92.

[0062] The strip steel plate M is fed downstream, and by bringing the movable mold 92 close to the fixed mold 90 when it is temporarily stopped, that is, lowering it, the outer peripheral punching, lamination and bonding of the steel plate component 22, the application of adhesive to the position of the outer peripheral punched steel plate component 22 in the strip steel plate M, the second punching process to the position of the adhesive applied in the strip steel plate M, and the first punching process to the position of the second punching process in the strip steel plate M.

[0063] Next, after raising the movable mold 92 to a position above the strip steel plate M, the strip steel plate M is fed downstream a predetermined distance and then temporarily stopped again. In this state, the movable mold 92 is lowered, and processing at each position continues. In this way, by repeating the process of intermittently feeding the strip steel plate M while moving the movable mold 92 up and down during temporary stops, the laminated iron core 20 is manufactured.

[0064] Next, the effects of this embodiment will be explained.

[0065] When components forming the flow path through which the anaerobic adhesive flows are made of metal (e.g., flow paths in piping or molds), the anaerobic adhesive reacts with the metal, and the curing reaction proceeds gradually even without the addition of a curing accelerator. Due to the curing reaction of the anaerobic adhesive, its fluidity decreases. Especially in narrow flow paths or in bends in piping or flow paths, even a slight decrease in fluidity can sometimes lead to blockage. For example, when applying the anaerobic adhesive to a strip of steel M using a needle-shaped metal nozzle, the anaerobic adhesive cures easily within the nozzle. Thus, the curing reaction of the anaerobic adhesive readily occurs within the nozzle, resulting in changes in viscosity, making it difficult to apply an appropriate amount of adhesive to the strip of steel M over time. When the steel plate component 22 is punched at a punching speed of 100 sppm or higher, it becomes particularly difficult to apply an appropriate amount of adhesive to the strip steel plate M because the flowability of the anaerobic adhesive that has undergone the curing reaction is reduced. To address this, in the manufacturing apparatus 30 of this embodiment, the portion constituting the outlet 77 in the coating head 76 is made of a non-metallic material. In this embodiment, the outlet 77, which protrudes from the adhesive, is the narrowest part in the adhesive flow path. By making the portion constituting such an outlet 77 of a non-metallic material, the curing reaction of the adhesive within the outlet 77 can be suppressed. Furthermore, in the coating head 76, the portion constituting the reservoir 78 that delivers the adhesive to the outlet 77 is also made of a non-metallic material. Therefore, the curing reaction of the adhesive within the reservoir 78 can be suppressed. Furthermore, because the components constituting the supply path 74 are also made of a non-metallic material, the curing reaction of the adhesive within the supply path 74 can be suppressed. By using a non-metallic material to construct the flow path of the adhesive, the curing reaction of the adhesive can be suppressed, and an appropriate amount of adhesive can be applied to the strip steel sheet M. Furthermore, because the curing reaction of the adhesive can be suppressed, even when the steel sheet component 22 is punched at a punching speed of 100 spps or higher, an appropriate amount of adhesive can still be applied to the strip steel sheet M. Moreover, because the curing reaction of the adhesive can be suppressed, maintenance of the coating head 76 due to clogging is eliminated for extended periods. Therefore, maintainability is improved.

[0066] Furthermore, in manufacturing apparatus 30, such as Figure 6BAs shown, with the adhesive protruding from the outlet 77, the outlet 77 is brought close to the strip steel plate M to apply the adhesive to the lower surface of the strip steel plate, leaving a gap between the outlet 77 and the strip steel plate M. However, when the adhesive is applied by bringing the outlet 77 into contact with the strip steel plate M, there is a risk that the curing reaction of the anaerobic adhesive in contact with the strip steel plate M may be accelerated. To address this, in the manufacturing apparatus 30, a gap is left between the outlet 77 and the strip steel plate M during adhesive application, thus making it difficult to accelerate the curing reaction of the anaerobic adhesive and suppressing blockage of the outlet 77.

[0067] Furthermore, in the manufacturing apparatus 30, the entire coating head 76 is constructed of a non-metallic material. Therefore, compared to the case where a portion of the coating head 76 is made of a metallic material, the curing reaction of the adhesive can be reliably suppressed.

[0068] Furthermore, in the manufacturing apparatus 30, adhesive is fed to each discharge port 77 via the storage section 78. Therefore, the flow path length from the storage section 78 to each discharge port 77 is approximately constant, allowing an appropriate amount of adhesive to be discharged from each discharge port.

[0069] Furthermore, in the manufacturing apparatus 30, a resin material is used as the non-metallic material. Resin materials have excellent formability, thus facilitating the forming of the coating head 76 and the supply path 74. Additionally, the coating head 76 and the supply path 74 can be made lighter.

[0070] Furthermore, in manufacturing apparatus 30, the resin material is selected from polyacetal resin, polyethylene resin, polypropylene resin, polyetheretherketone resin, or polytetrafluoroethylene resin. These resin materials possess excellent strength, chemical resistance, and other properties. Therefore, the durability of components using these resin materials is improved.

[0071] (Other implementation methods)

[0072] In manufacturing apparatus 30, it can also be used Figure 7A and Figure 7B The coating head 100 shown replaces the aforementioned coating head 76. The coating head 100 is equipped with a pad 102 that holds the adhesive within the discharge port 77. Preferably, the surface of the pad 102 is flush with or protrudes slightly from the top surface 79a of the protrusion 79. The adhesive bulges from the surface of the pad 102, thus allowing the adhesive to be applied to the strip steel plate M with a gap between the strip steel plate M and the pad 102. By configuring the pad 102 within the discharge port 77 in this way, it is easier to apply an appropriate amount of adhesive to the strip steel plate M.

[0073] In manufacturing apparatus 30, it can also be used Figure 8The coating head 110 shown replaces the aforementioned coating head 76. The coating head 110 has a slit 112 (e.g., a slot) formed on the top surface 79a of the protrusion 79, extending across the outlet 77. Specifically, the slit 112 extends radially across the outlet 77 of the protrusion 79. By forming such a slit 112, residual adhesive S can be dispersed through the slit 112 to the radially inner or outer side of the protrusion 79. This facilitates the application of an appropriate amount of adhesive onto the strip steel plate M.

[0074] The coating head 76 can also be formed by assembling multiple components. By making the coating head 76 an assembly type, only the clogged or deteriorated components can be replaced. Furthermore, for example, by constructing the upper and lower surfaces of the inner wall surface 78a of the reservoir 78 with different components, and by applying enamel treatment, DLC treatment (diamond-like carbon), or resin coating (resin coating, embedding molding) to the upper and lower surfaces of the reservoir 78 of these different components, the matrix of the different components can be formed with a metallic material.

[0075] In the manufacturing apparatus 30, adhesive is applied to the lower surface of the strip steel plate M via the adhesive application section 70, but this disclosure is not limited to this configuration. For example, the adhesive application section 70 may be disposed on the lower surface of the movable mold 92, and adhesive may be applied to the upper surface of the strip steel plate M.

[0076] The above describes one embodiment of the present disclosure, but the present disclosure is not limited to the above content. Of course, various modifications beyond the above can be implemented without departing from its spirit.

[0077] Regarding the above implementation methods, the following notes are further disclosed.

[0078] <Postscript 1>

[0079] [1]

[0080] An apparatus for manufacturing a laminated iron core, comprising:

[0081] The upper and lower dies are used to punch and cut steel plate components by pressing the strip steel plate sent downstream.

[0082] A lamination section, disposed in the lower die, is used to bond and laminate the punched steel sheet components with an adhesive; and

[0083] A coating section is disposed on the upstream side of the lower die or the upper die in the feeding direction of the strip steel sheet, relative to the laminating section, for coating one side of the strip steel sheet with adhesive.

[0084] The coating section has multiple outlets for discharging the adhesive, and the portion constituting each outlet is made of a non-metallic material.

[0085] [2]

[0086] The manufacturing apparatus for laminated iron cores as described in [1], wherein,

[0087] The coating section has a reservoir for storing the adhesive supplied from the outside.

[0088] The adhesive is delivered from the reservoir to each of the discharge ports.

[0089] [3]

[0090] The manufacturing apparatus for the laminated iron core as described in [2], wherein,

[0091] In the coating section, the portion constituting the storage section is made of a non-metallic material.

[0092] [4]

[0093] The manufacturing apparatus for laminated iron cores as described in [1], wherein,

[0094] The entire coating section is made of non-metallic material.

[0095] [5]

[0096] The manufacturing apparatus for laminated iron cores as described in [1], wherein,

[0097] Each of the aforementioned outlets is provided with a pad impregnated with the adhesive.

[0098] [6]

[0099] The manufacturing apparatus for laminated iron cores as described in [1], wherein,

[0100] The non-metallic material is a resin material.

[0101] [7]

[0102] The manufacturing apparatus for laminated iron cores as described in [6], wherein,

[0103] The resin material is polyacetal resin, polyethylene resin, polypropylene resin, polyetheretherketone resin, or polytetrafluoroethylene resin.

[0104] [8]

[0105] A method for manufacturing a laminated iron core, wherein the strip steel sheet is fed into an upper die and a lower die for stamping and cutting steel sheet components.

[0106] Adhesive is applied to one side of the strip steel plate by discharging adhesive from multiple outlets made of non-metallic material in the coating section provided in the lower mold or the upper mold.

[0107] While the steel plate components punched from the strip steel plate by the upper and lower dies are bonded together with the adhesive, they are stacked.

[0108] <Appendix 2>

[0109] [1]

[0110] An apparatus for manufacturing a laminated iron core, comprising:

[0111] The upper and lower dies are used to punch and cut steel plate components by pressing the strip steel plate sent downstream.

[0112] A lamination section, disposed in the lower die, is used to bond and laminate the punched steel sheet components with an adhesive; and

[0113] A coating section is disposed on the upstream side of the lower die or the upper die in the feeding direction of the strip steel sheet, relative to the laminating section, for coating one side of the strip steel sheet with adhesive.

[0114] The coating section has multiple outlets that continuously discharge the adhesive, and the portion constituting each outlet is made of a non-metallic material.

[0115] [2]

[0116] The manufacturing apparatus for laminated iron cores as described in [1], wherein,

[0117] The coating section has a reservoir for storing the adhesive supplied from the outside.

[0118] The adhesive is delivered from the reservoir to each of the discharge ports.

[0119] [[3]]

[0120] The manufacturing apparatus for the laminated iron core as described in [2], wherein,

[0121] In the coating section, the portion constituting the storage section is made of a non-metallic material.

[0122] [4]

[0123] The apparatus for manufacturing a laminated iron core as described in any one of [1] to [3], wherein,

[0124] The entire coating section is made of non-metallic material.

[0125] [5]

[0126] The apparatus for manufacturing a laminated iron core as described in any one of [1] to [4], wherein,

[0127] Each of the discharge ports is provided with a pad to retain the adhesive.

[0128] [6]

[0129] The apparatus for manufacturing a laminated iron core as described in any one of [1] to [5], wherein,

[0130] The non-metallic material is a resin material.

[0131] [7]

[0132] The manufacturing apparatus for laminated iron cores as described in [6], wherein,

[0133] The resin material is polyacetal resin, polyethylene resin, polypropylene resin, polyetheretherketone resin, or polytetrafluoroethylene resin.

[0134] [8]

[0135] The apparatus for manufacturing a laminated iron core as described in any one of [1] to [7], wherein,

[0136] The coating section has a coating head with annular protrusions.

[0137] Each of the aforementioned outlets is located at the top of the protrusion.

[0138] [9]

[0139] A method for manufacturing a laminated iron core, wherein the strip steel sheet is fed into an upper die and a lower die for stamping and cutting steel sheet components.

[0140] Adhesive is continuously discharged from multiple outlets made of non-metallic material in the coating section provided in the lower mold or the upper mold to coat one side of the strip steel plate.

[0141] While the steel plate components punched from the strip steel plate by the upper and lower dies are bonded together with the adhesive, they are stacked.

[0142] Furthermore, the entire disclosure of Japanese Patent Application No. 2023-195401, filed on November 16, 2023, is incorporated herein by reference.

[0143] All documents, patent applications and technical standards described in this specification are incorporated herein by reference to the same extent as those documents, patent applications and technical standards specifically and individually described therein through reference.

[0144] Explanation of reference numerals in the attached figures

[0145] 20-layer iron core

[0146] 22 Steel plate components

[0147] 30 Manufacturing equipment

[0148] 40 Delivery Department

[0149] 50 Oil Coating Section

[0150] 60 Stamping Processing Department

[0151] 62 First punching section

[0152] 64 Second punching section

[0153] 70 Adhesive Coating Section

[0154] 72 Adhesive supply device

[0155] 74 Supply Route

[0156] 76 Coating head

[0157] 80-layer stack

[0158] 90 Fixed mold

[0159] 92 movable models

[0160] 100 coating heads

[0161] 102 pads

[0162] 110 Coating Head

[0163] 112 Incision

[0164] F steel coil material

[0165] M strip steel plate

Claims

1. An apparatus for manufacturing a laminated iron core, comprising: The upper and lower dies are used to punch and cut steel plate components by pressing the strip steel plate sent downstream. The lamination section, which is provided in the lower die, is used to bond and laminate the punched steel plate parts with adhesive; as well as A coating section is disposed on the upstream side of the lower die or the upper die in the feeding direction of the strip steel sheet, relative to the laminating section, for coating one side of the strip steel sheet with adhesive. The coating section has multiple outlets that continuously discharge the adhesive, and the portion constituting each outlet is made of a non-metallic material.

2. The apparatus for manufacturing a laminated iron core as described in claim 1, wherein, The coating section has a reservoir for storing the adhesive supplied from the outside. The adhesive is delivered from the reservoir to each of the discharge ports.

3. The apparatus for manufacturing a laminated iron core as described in claim 2, wherein, The portion of the coating section that constitutes the storage section is made of a non-metallic material.

4. The apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 3, wherein, The entire coating section is made of non-metallic material.

5. The apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 4, wherein, Each of the discharge ports is provided with a pad to retain the adhesive.

6. The apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 5, wherein, The non-metallic material is a resin material.

7. The apparatus for manufacturing a laminated iron core as described in claim 6, wherein, The resin material is polyacetal resin, polyethylene resin, polypropylene resin, polyetheretherketone resin, or polytetrafluoroethylene resin.

8. The apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 7, wherein, The coating section has a coating head with annular protrusions. Each of the aforementioned outlets is located at the top of the protrusion.

9. A method for manufacturing a laminated iron core, wherein the strip steel plate is fed into an upper die and a lower die for stamping and cutting steel plate components. Adhesive is continuously discharged from multiple outlets made of non-metallic material in the coating section provided in the lower mold or the upper mold to coat one side of the strip steel plate. While the steel plate components punched from the strip steel plate by the upper and lower dies are bonded together with the adhesive, they are stacked.

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