WO2019088618A1 - Apparatus for manufacturing adhesive lamination core by adhesive coating on strip - Google Patents

Apparatus for manufacturing adhesive lamination core by adhesive coating on strip Download PDF

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Publication number
WO2019088618A1
WO2019088618A1 PCT/KR2018/012902 KR2018012902W WO2019088618A1 WO 2019088618 A1 WO2019088618 A1 WO 2019088618A1 KR 2018012902 W KR2018012902 W KR 2018012902W WO 2019088618 A1 WO2019088618 A1 WO 2019088618A1
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WO
WIPO (PCT)
Prior art keywords
unit
lamination core
adhesive
manufacturing
lamination
Prior art date
Application number
PCT/KR2018/012902
Other languages
French (fr)
Inventor
In Gyu Jung
Original Assignee
Hangnam Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170146525A external-priority patent/KR101990296B1/en
Priority claimed from KR1020170146526A external-priority patent/KR102005635B1/en
Application filed by Hangnam Co., Ltd. filed Critical Hangnam Co., Ltd.
Publication of WO2019088618A1 publication Critical patent/WO2019088618A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B32B37/1292—Application of adhesive selectively, e.g. in stripes, in patterns
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof

Definitions

  • the present invention relates to an apparatus for manufacturing an adhesive lamination core by stacking laminar members. More specifically, the present invention relates to an apparatus for manufacturing an adhesive lamination core, capable of promoting productivity of a lamination core through an effective layout including adhesive coating.
  • lamination cores are manufactured by stacking a plurality of lamina members obtained by punching a strip.
  • Lamination cores are used as motors, or stators or rotors of generators, and many processes for manufacturing the same are disclosed.
  • the representative process is successively manufacturing lamina members obtained by performing piercing such as making slots, teeth, etc., and blanking sequentially on strips of steel sheet supplied to a progressive molding device, stacking the predetermined number of sheets of the manufactured lamina member and coupling the lamina members, to manufacture a lamination core.
  • an embossing lamination method in which an embossed pattern is formed in each of lamina members, and the lamina members are coupled with each other by fitting the embossing patterns into each other upon stacking is known as a representative method of coupling lamina members.
  • Korean Patent No. 10-1627471 discloses an apparatus for manufacturing a lamination core by punching a strip made by coating an adhesive film on a steel sheet, in a forming apparatus, and stacking lamina members simultaneously with heating.
  • the aforementioned patent uses a strip that is coated with an adhesive film upon manufacture of a steel sheet.
  • the strip is typically manufactured by steel sheet manufacturers and distributed in a reel shape.
  • the reel is to be installed in an uncoiler to unwind the strip.
  • the present inventors propose an apparatus for manufacturing a lamination core with a new layout, capable of manufacturing a strip by applying or coating an adhesive on a steel sheet and at the same time supplying the manufactured strip to the apparatus for manufacturing a lamination core.
  • the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip comprises an uncoiling unit 50 including a reel 51 on which a steel sheet is wound; a leveling unit 60 installed at one side of the uncoiling unit 50, including a leveler 61 leveling the steel sheet; a bonding unit 70 installed at one side of the leveling unit 60, including an application device 71 applying an adhesive to the steel sheet; a drying unit 80 installed at one side of the bonding unit 70, drying the steel sheet with the adhesive applied thereto; a cooling unit 90 installed at one side of the drying unit 80, cooling the steel sheet to manufacture a strip 200; and a lamination core manufacturing unit 100 installed at one side of the cooling unit 90, forming the strip 200 to manufacture a lamination core 200A.
  • the lamination core manufacturing unit 100 includes an upper mold 10 and a lower mold 20, punches mounted in the upper mold 10 performing a plurality of piercing stages on strips 200 sequentially transferred in the upper portion of the lower mold 20 to sequentially form lamina members 200-1 and blanking to sequentially manufacture lamination cores 200A comprising the predetermined number of sheets of laminar member 200-1, the lamination core manufacturing unit 100 comprising a plurality of piercing punches installed in the upper mold 10 for forming the strip 200 into the lamina members 200-1; a plurality of piercing dies installed in the lower mold 20 to correspond to the plurality of piercing punches; a blanking punch 16 of the upper mold 10, installed at one side of the plurality of piercing punches; a blanking die 24 of the lower mold 20, installed at the location corresponding to the blanking punch 16; and a squeeze ring 27 installed below the blanking die, in which the lamina members 200-1 are stacked, wherein
  • the discharge unit 400 includes a carrier 401 moving up and down by a lifting means 402.
  • an electromagnetic 403 is installed inside or on the carrier 401.
  • the electromagnetic 403 may be configured to be installed below the lamination core such that the lamination core is attached to the carrier 401.
  • the apparatus for manufacturing an adhesive lamination core further comprises a spray unit 30 installed in the blanking punch 16, wherein the spray unit 30 includes a plurality of nozzles 31 installed in the blanking punch 16 and a storage tank 32 connected with the plurality of nozzles, wherein the nozzle 31 sprays an activating agent 40 or a release agent 40' to the upper portion of the blanked lamina member 200-1.
  • the present invention performs coating an adhesive before manufacturing a lamination core, thereby achieving the effect of improving productivity and reducing manufacturing costs.
  • the present invention can discharge a lamination core from a discharge unit using an electromagnet, and thus continue the operation without stopping the apparatus and solve the problem of lamination cores stuck in a squeeze ring, thereby promoting productivity of products.
  • the present invention manufactures a lamination core by bonding lamina members manufactured from a strip coated with an adhesive and stacking the predetermined number of sheets of lamina member, thereby improving the quality of lamination cores and promoting productivity.
  • the present invention separates a lamination core comprising the predetermined number of sheets of lamina member from another lamination core comprising the predetermined number of sheets of lamina member using a release agent by spraying, thereby facilitating separation of core products and improving productivity of lamination cores.
  • Fig. 1 is a perspective view illustrating the strip used for the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention
  • Fig. 2 is a perspective view illustrating the lamination core comprising the stacked lamina members, manufactured by the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention
  • Fig. 3 is a cross-sectional side view illustrating the overall apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention
  • Fig. 4 is a cross-sectional side view illustrating the lamination core manufacturing unit according to the present invention.
  • Fig. 5 is a bottom view illustrating the upper mold of the lamination core manufacturing unit according to the present invention.
  • Fig. 6 is a schematic diagram illustrating the process for forming a lamination core in the adhesive lamination core manufacturing unit according to the present invention, (a) is a view illustrating the state in which a typical adhesive is applied to the upper surface of the lamina member, (b) is a view illustrating the state in which the predetermined number of sheets of lamina member adheres to each other and is stacked, and a release agent is applied to the lamina member on the uppermost portion of the lamination core and (c) is a view illustrating the separated lamination core;
  • Fig. 7 is a schematic cross-section view illustrating the discharge unit of the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention.
  • Fig. 8 is a process flow diagram illustrating the process for manufacturing a lamination core using the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention.
  • Fig. 1 is a perspective view illustrating the strip 200 used for the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention.
  • Fig. 2 is a perspective view illustrating the lamination core 200' manufactured by the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention.
  • the strip 200 used in the present invention is subjected to coating with an adhesive 200B on the surface of a steel sheet 200A.
  • the adhesive 200B is a common thermosetting adhesive.
  • the drawing illustrates that the adhesive 200B is coated only on the surface of the steel sheet 200A, but it is not limited to the surface.
  • the adhesive 200B may be coated on the back surface or both surfaces of the steel sheet, if necessary.
  • lamina members with a common thermosetting adhesive applied thereto are continuously stacked in a lamination core manufacturing unit 100, while adhering to each other, to manufacture a lamination core.
  • a lamination core manufacturing unit 100 while adhering to each other, to manufacture a lamination core.
  • the tenth lamina member is required not to adhere to the lamina member directly above it.
  • a release agent 40 is applied to the upper surface of the tenth lamina member such that a lamination core does not adhere to the lamina member directly above it but separates therefrom.
  • the present invention does not limit an adhesive that is coated on the steel sheet to a thermosetting adhesive.
  • Any adhesive suitable for manufacturing a lamination core such as a chemically reactive adhesive, an alcohol reactive adhesive, an anaerobic adhesive, etc., other than a thermosetting adhesive may be employed.
  • Fig. 3 is a cross-sectional side view illustrating the overall apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention.
  • the apparatus for manufacturing a lamination core by adhesive coating on a strip includes an uncoiling unit 50, a leveling unit 60, a bonding unit 70, a drying unit 80, a cooling unit 90, a lamination core manufacturing unit 100, a lamination unit 300 and a discharge unit 400.
  • the uncoiling unit 50, leveling unit 60, bonding unit 70, drying unit 80 and cooling unit 90 perform a process for manufacturing the strip 200 by coating an adhesive on the surface, back surface or both surfaces of the steel sheet 200A.
  • the lamination core manufacturing unit 100, lamination unit 300 and discharge unit 400 perform a process for forming the strip 200 and manufacturing and discharging a lamination core.
  • the uncoiling unit 50 includes a reel 51 on which the steel sheet 200A is wound.
  • the steel sheet 200A wound on the reel 51 is unwound and supplied while the reel 51 rotates.
  • the supplied steel sheet 200A is deformed into a curved shape while being wound on the reel.
  • the steel sheet is supplied to the leveling unit 60 installed at one side of the uncoiling unit 50.
  • the steel sheet 200A supplied to the leveling unit 60 is leveled while passing through a leveler 61.
  • the steel sheet 200A passing through the leveler 61 is supplied to the bonding unit 70 installed at one side of the leveling unit 60.
  • the bonding unit 70 includes an application device 71, and the application device 71 in the shape of a roller or a sprayer, etc., applies an adhesive to the surface, back surface or both surfaces of the steel sheet.
  • the steel sheet 200A with the adhesive applied thereto is supplied to the drying unit 80 installed at one side of the bonding unit 70.
  • the adhesive applied to the steel sheet is dried while passing through the drying unit 80.
  • the drying unit 80 includes a first dryer 81 and a second drier 82. More preferably, the first drier 81 is a drier using the radiant heat of a heater, and the second drier 82 is a drier using the warm current of air.
  • the drying unit 80 is not limited to the way including two driers, but may use various drying ways according to need.
  • the steel sheet 200A passing the drying unit 80 passes through the cooling unit 90 installed at one side of the drying unit 80.
  • the cooling unit 90 includes a cooler 91.
  • the cooler 91 preferably supplies cool air of room temperature or below to the surface of the steel sheet 200A such that the adhesive is completely coated on the surface of the steel sheet.
  • the steel sheet 200A coated with the adhesive now becomes the strip 200, and the strip 200 is supplied to the lamination core manufacturing unit 100 installed at one side of the cooling unit 90.
  • lamination core manufacturing unit 100 When lamina members are formed in the lamination core manufacturing unit 100 according to the present invention, multiple lamina members are stacked in the lamination unit 300, to manufacture a lamination core.
  • the lamination unit 300 as a part of the lamination core manufacturing unit 100, is installed below the blanking die.
  • the lamination core stacked in the lamination unit 300 is discharged through the discharge unit 400 installed below the lamination unit 300.
  • Fig. 4 is a schematic cross-sectional side view illustrating the lamination core manufacturing unit 100 according to the present invention.
  • the lamination core manufacturing unit 100 includes an upper mold 10 and a lower mold 20.
  • a first piercing punch 11, a second piercing punch 12, a third piercing punch 13, a fourth piercing punch 14, and a fifth piercing punch 15 are sequentially installed for successive piercing stages, and then a blanking punch 16 is installed.
  • the lower mold 20 corresponding to the upper mold 10 includes a die plate 21, a die backing plate 22 and a die holder 23.
  • a first piercing die 211, a second piercing die 212, a third piercing die 213, a fourth piercing die 214 and a fifth piercing die 215 are installed at the locations corresponding to the first to fifth piercing punches of the upper mold 10.
  • a blanking die 24 is installed at one side of the fifth piercing die 215.
  • the first to fifth piercing punches and the first to fifth piercing dies sequentially form a strip into the shape of lamina member through five successive piercing stages.
  • the specification and drawings of the present invention illustrate and describe five piercing stages, but do not necessarily limit the five piercing stages. That is, according to the shape of lamina member for a lamination core manufactured, the piercing may include a plurality of stages, not five stages, that is, two stages, three stages, four stages, six stages or more than six stages. Therefore, the five piercing stages described in the specification and drawings of the present invention should be construed as being provided for the sake of convenience of explanation, and the present invention covers all cases of performing a plurality of piercing stages.
  • the blanking die 24 corresponding to the blanking punch 16 is installed in the lower mold 20 to perform blanking.
  • the lamination unit 300 is installed below the blanking die 24 such that lamina members 200-1 formed from the strip 200 are sequentially stacked in a squeeze ring 27 of the lamination unit 300 to manufacture a lamination core 200A.
  • a lamination core 200A For the shape of the lamination core 200A, please refer to Fig. 2.
  • reference numeral 17 in the upper mold 10 denotes a punch plate in which each punch is installed; 17-1 denotes a striper plate for holding a strip and punching a desired shape; 18 denotes a punch backing plate; and 19 denotes a punch holder in which the punch plate is installed.
  • the blanking die 24 is a support constituting the lamination unit 300.
  • the lamination unit 300 may include the blanking die 24, a rotation die 26 and the squeeze ring 27.
  • the lamination core 200 comprising the predetermined number of sheets of lamina member 200-1 is discharged from the lower portion of the squeeze ring.
  • the squeeze ring 27 may be installed in the rotation die 26 such that the lamina members 200-1 are stacked while rotating at a certain pitch.
  • the spray unit 30 is installed in the blanking punch 16 of the upper mold 10.
  • the spray unit 30 applies the release agent 40 to the upper surface of the blanked lamina member.
  • Fig. 5 is a bottom view illustrating the upper mold 10 of the adhesive lamination core manufacturing unit 100 according to the present invention.
  • the spray unit 30 installed in the blanking punch 16 of the adhesive lamination core manufacturing unit 100 according to the present invention includes a nozzle 31 and a storage tank 32.
  • the nozzle 31 is installed on one side of the lower portion of the blanking punch 16 to apply the release agent 40 by spraying to the upper portion of the blanked lamina member 200-1.
  • the nozzle 31 is connected to the storage tank 32 with a hose, etc., such that the release agent 40 stored in the storage tank 32 is supplied to the nozzle 31.
  • Fig. 5 illustrates six nozzles; but the number of nozzles is not necessarily limited to six, and two or four, etc. nozzles may be used according to the conditions such as the size of lamina member, etc.
  • the blanking punch 16 is lowered to blank the strip, and then the shape of lamina member is formed.
  • the release agent 40 is applied to the upper surface of the formed lamina member.
  • a lamina member is stacked on the lamina member with the release agent 40 applied thereto in the squeeze ring 27, and then the lamina member with the release agent 40 is squeezed out to the lower portion while attaching each other.
  • Fig. 6 is a schematic diagram illustrating the process for stacking a lamination core in the lamination core manufacturing unit 100 according to the present invention, (a) is a view illustrating the state in which a typical adhesive is applied to the upper surface of the lamina member, (b) is a view illustrating the state in which the predetermined number of sheets of lamina member adheres to each other and stacked, and a release agent is applied to the lamina member on the uppermost portion of the lamination core and (c) is a view illustrating the separated lamination core.
  • the strip coated with a common thermosetting adhesive 200B on the upper surface thereof is punched in the blanking punch 16 to manufacture a lamina member 200-1.
  • Fig. 6(b) illustrates sequentially stacked lamina members 200-1.
  • the drawing illustrates that a lamination core comprises ten lamina members 200-1 stacked. Since the common thermosetting adhesive 200B is applied to the lamina members 200-1, the adhesive 200B is activated to exhibit adhesive performance upon application of heat to the stacked lamina members.
  • a heating means 25 for heating the squeeze ring 27 in which the lamina members are stacked may be installed around the squeeze ring 27.
  • the release agent 40 is applied to the upper surface of the tenth lamina member.
  • the release agent 40 is applied to the top of the adhesive 200B by spraying through the nozzle.
  • a lamination core 200A comprises ten lamina members stacked is discharged from the lower portion of the squeeze ring 27, as illustrated in Fig. 6(c).
  • Fig. 6(b) illustrates that the release agent 40 is applied at certain intervals, but it is illustrated in such manner for the sake of convenience of explanation. Practically, the release agent is applied more closely and evenly.
  • Fig. 7 is a schematic cross-section view illustrating the discharge unit 400 used for unloading of the adhesive lamination core manufacturing unit 100 according to the present invention.
  • a lamination core stacked inside the squeeze ring 27 of the lamination unit 300 is discharged to the lower portion, the lamination core is received on a carrier 401 of the discharge unit 400.
  • the carrier 401 is connected to a lifting means 402 operating up and down, and the lifting means 402 moves the carrier 401 up and down.
  • a discharge rod 411 operates by an operation means 410 to push and discharge the lamination core 200' to an external conveyor 420.
  • a cylinder or a motor, etc. may be used as the operation means 410 and the lifting means 402.
  • the lamination core 200' is squeezed out to the lower portion while being strongly pressed against the inner surface of the squeeze ring 27, upon stacking of a lamina member on the top thereof.
  • a lamination core pressed against the inside of the squeeze ring 27 is not smoothly squeezed out but is stuck inside the squeeze ring 27.
  • the apparatus should stop operation to remove the lamination core stuck in the squeeze ring 27, and then the apparatus re-operates, which degrades productivity.
  • an electromagnet 403 is installed inside or on the carrier 401 of the discharge unit 400.
  • the electromagnet 403 operates when the carrier 401 is lifted by operation of the lifting means 402.
  • the electromagnet 403 stops operation when the lamination core 200' is received on the carrier 401 by an attractive force of the electromagnet 403, and then the carrier 401 is lowered.
  • the operation of the electromagnet 403 is controlled by a controller (not illustrated) electrically connected thereto.
  • Fig. 8 is a process flow diagram illustrating performed by the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention. Referring to Fig. 8, the process for manufacturing a lamination core performed by the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention is described as below.
  • a steel sheet wound on the reel is unwound and supplied.
  • the unwound steel sheet is leveled.
  • an adhesive is applied to the surface, back surface or both surfaces of the steel sheet.
  • the steel sheet 200' with the adhesive applied thereto is dried during drying and cooled during cooling, to manufacture a strip coated with the adhesive.
  • the plurality of piercing punches perform operation on the strip 200 passing over the corresponding piercing dies to form the shape of lamina member on the strip 200.
  • the strip 200 is punched to obtain a lamina member 200-1.
  • the release agent 40 is applied through the nozzle 31 of the spray unit 30 to the upper surface of the punched lamina member 200-1.
  • the lamina members 200-1 are successively laminated in the squeeze ring 27 of the lamination unit 300.
  • the lamination core comprising the predetermined sheets of lamina member stacked as a product is disposed on the carrier 401 of the discharge unit 400, and then, when the carrier 401 is lowered, the lamination core 200' disposed on the conveyor 420 is discharged below the apparatus by operation of the discharge rod 411.

Abstract

The apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention comprises an uncoiling unit 50 including a reel 51 on which a steel sheet is wound; a leveling unit 60 installed at one side of the uncoiling unit 50, including a leveler 61 leveling the steel sheet; a bonding unit 70 installed at one side of the leveling unit 60, including an application device 71 applying an adhesive to the steel sheet; a drying unit 80 installed at one side of the bonding unit 70, drying the steel sheet with the adhesive applied thereto; a cooling unit 90 installed at one side of the drying unit 80, cooling the steel sheet to manufacture a strip 200; and a lamination core manufacturing unit 100 installed at one side of the cooling unit 90, forming the strip 200 to manufacture a lamination core 200A.

Description

APPARATUS FOR MANUFACTURING ADHESIVE LAMINATION CORE BY ADHESIVE COATING ON STRIP
The present invention relates to an apparatus for manufacturing an adhesive lamination core by stacking laminar members. More specifically, the present invention relates to an apparatus for manufacturing an adhesive lamination core, capable of promoting productivity of a lamination core through an effective layout including adhesive coating.
In general, lamination cores are manufactured by stacking a plurality of lamina members obtained by punching a strip. Lamination cores are used as motors, or stators or rotors of generators, and many processes for manufacturing the same are disclosed.
The representative process is successively manufacturing lamina members obtained by performing piercing such as making slots, teeth, etc., and blanking sequentially on strips of steel sheet supplied to a progressive molding device, stacking the predetermined number of sheets of the manufactured lamina member and coupling the lamina members, to manufacture a lamination core.
As disclosed in Japanese Patent Laid-open No. 2010-130824, an embossing lamination method in which an embossed pattern is formed in each of lamina members, and the lamina members are coupled with each other by fitting the embossing patterns into each other upon stacking is known as a representative method of coupling lamina members.
In a motor core manufactured by the embossing lamination method, female and male protrusions in a substrate are forcedly fitted into each other for coupling, which causes iron loss and loss of magnetic flux density, while playing like speed bumps on the road. Also, the space factor is degraded, and vibration noise occurs due to resonance phenomenon.
In order to solve these problems, Korean Patent No. 10-1627471 discloses an apparatus for manufacturing a lamination core by punching a strip made by coating an adhesive film on a steel sheet, in a forming apparatus, and stacking lamina members simultaneously with heating. The aforementioned patent uses a strip that is coated with an adhesive film upon manufacture of a steel sheet. The strip is typically manufactured by steel sheet manufacturers and distributed in a reel shape. In order to supply the strip wound on the reel to the apparatus for manufacturing a lamination core, the reel is to be installed in an uncoiler to unwind the strip. In the case of manufacturing a lamination core using such method, a steel sheet is to be unwound from the reel and coated with an adhesive film, and then wound on the reel again to be transferred to the apparatus for manufacturing a lamination core, which requires complicated manufacturing processes and high manufacturing costs.
Accordingly, in order to solve these problems, the present inventors propose an apparatus for manufacturing a lamination core with a new layout, capable of manufacturing a strip by applying or coating an adhesive on a steel sheet and at the same time supplying the manufactured strip to the apparatus for manufacturing a lamination core.
It is an object of the present invention to provide an apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip having an effective layout that can promote productivity and reduce manufacturing costs.
It is another object of the present invention to provide an apparatus for manufacturing an adhesive lamination core, capable of obtaining a predetermined lamination core, by which punches mounted in an upper mold form sheets of lamina member through piercing and blanking performed on strips sequentially transferred in the upper portion of a lower mold, wherein the lamina members can adhere to each other by using the strip coated with an adhesive.
It is another object of the present invention to provide an apparatus for manufacturing an adhesive lamination core which facilitates separation of a stacked core product by applying a release agent to lamina members by spraying.
The above objects of the present invention and other inherent objects could be easily achieved by the present invention explained in the following.
The apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention comprises an uncoiling unit 50 including a reel 51 on which a steel sheet is wound; a leveling unit 60 installed at one side of the uncoiling unit 50, including a leveler 61 leveling the steel sheet; a bonding unit 70 installed at one side of the leveling unit 60, including an application device 71 applying an adhesive to the steel sheet; a drying unit 80 installed at one side of the bonding unit 70, drying the steel sheet with the adhesive applied thereto; a cooling unit 90 installed at one side of the drying unit 80, cooling the steel sheet to manufacture a strip 200; and a lamination core manufacturing unit 100 installed at one side of the cooling unit 90, forming the strip 200 to manufacture a lamination core 200A.
In the present invention, preferably, the lamination core manufacturing unit 100 includes an upper mold 10 and a lower mold 20, punches mounted in the upper mold 10 performing a plurality of piercing stages on strips 200 sequentially transferred in the upper portion of the lower mold 20 to sequentially form lamina members 200-1 and blanking to sequentially manufacture lamination cores 200A comprising the predetermined number of sheets of laminar member 200-1, the lamination core manufacturing unit 100 comprising a plurality of piercing punches installed in the upper mold 10 for forming the strip 200 into the lamina members 200-1; a plurality of piercing dies installed in the lower mold 20 to correspond to the plurality of piercing punches; a blanking punch 16 of the upper mold 10, installed at one side of the plurality of piercing punches; a blanking die 24 of the lower mold 20, installed at the location corresponding to the blanking punch 16; and a squeeze ring 27 installed below the blanking die, in which the lamina members 200-1 are stacked, wherein a discharge unit 400 discharging the lamination cores is further installed below the squeeze ring 27.
In the present invention, preferably, the discharge unit 400 includes a carrier 401 moving up and down by a lifting means 402.
In the present invention, preferably, an electromagnetic 403 is installed inside or on the carrier 401.
In the present invention, the electromagnetic 403 may be configured to be installed below the lamination core such that the lamination core is attached to the carrier 401.
In the present invention, preferably, the apparatus for manufacturing an adhesive lamination core further comprises a spray unit 30 installed in the blanking punch 16, wherein the spray unit 30 includes a plurality of nozzles 31 installed in the blanking punch 16 and a storage tank 32 connected with the plurality of nozzles, wherein the nozzle 31 sprays an activating agent 40 or a release agent 40' to the upper portion of the blanked lamina member 200-1.
The present invention performs coating an adhesive before manufacturing a lamination core, thereby achieving the effect of improving productivity and reducing manufacturing costs.
The present invention can discharge a lamination core from a discharge unit using an electromagnet, and thus continue the operation without stopping the apparatus and solve the problem of lamination cores stuck in a squeeze ring, thereby promoting productivity of products.
Also, the present invention manufactures a lamination core by bonding lamina members manufactured from a strip coated with an adhesive and stacking the predetermined number of sheets of lamina member, thereby improving the quality of lamination cores and promoting productivity.
Also, the present invention separates a lamination core comprising the predetermined number of sheets of lamina member from another lamination core comprising the predetermined number of sheets of lamina member using a release agent by spraying, thereby facilitating separation of core products and improving productivity of lamination cores.
Fig. 1 is a perspective view illustrating the strip used for the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention;
Fig. 2 is a perspective view illustrating the lamination core comprising the stacked lamina members, manufactured by the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention;
Fig. 3 is a cross-sectional side view illustrating the overall apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention;
Fig. 4 is a cross-sectional side view illustrating the lamination core manufacturing unit according to the present invention;
Fig. 5 is a bottom view illustrating the upper mold of the lamination core manufacturing unit according to the present invention;
Fig. 6 is a schematic diagram illustrating the process for forming a lamination core in the adhesive lamination core manufacturing unit according to the present invention, (a) is a view illustrating the state in which a typical adhesive is applied to the upper surface of the lamina member, (b) is a view illustrating the state in which the predetermined number of sheets of lamina member adheres to each other and is stacked, and a release agent is applied to the lamina member on the uppermost portion of the lamination core and (c) is a view illustrating the separated lamination core;
Fig. 7 is a schematic cross-section view illustrating the discharge unit of the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention; and
Fig. 8 is a process flow diagram illustrating the process for manufacturing a lamination core using the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention.
Hereinafter, the present invention will be explained in more detail with reference to the accompanied drawings.
Fig. 1 is a perspective view illustrating the strip 200 used for the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention. Fig. 2 is a perspective view illustrating the lamination core 200' manufactured by the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention.
As illustrated in Fig. 1 and Fig. 2, the strip 200 used in the present invention is subjected to coating with an adhesive 200B on the surface of a steel sheet 200A. One embodiment according to the present invention, the adhesive 200B is a common thermosetting adhesive. Here, the drawing illustrates that the adhesive 200B is coated only on the surface of the steel sheet 200A, but it is not limited to the surface. The adhesive 200B may be coated on the back surface or both surfaces of the steel sheet, if necessary.
In the present invention, lamina members with a common thermosetting adhesive applied thereto are continuously stacked in a lamination core manufacturing unit 100, while adhering to each other, to manufacture a lamination core. However, if all the lamina members adhere to each other, it is impossible to manufacture a lamination core. In the case of manufacturing a lamination core comprising ten sheets of lamina member, the tenth lamina member is required not to adhere to the lamina member directly above it. Thus, a release agent 40 is applied to the upper surface of the tenth lamina member such that a lamination core does not adhere to the lamina member directly above it but separates therefrom.
The present invention does not limit an adhesive that is coated on the steel sheet to a thermosetting adhesive. Any adhesive suitable for manufacturing a lamination core, such as a chemically reactive adhesive, an alcohol reactive adhesive, an anaerobic adhesive, etc., other than a thermosetting adhesive may be employed.
Fig. 3 is a cross-sectional side view illustrating the overall apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention.
As illustrated in Fig. 3, the apparatus for manufacturing a lamination core by adhesive coating on a strip according to the present invention includes an uncoiling unit 50, a leveling unit 60, a bonding unit 70, a drying unit 80, a cooling unit 90, a lamination core manufacturing unit 100, a lamination unit 300 and a discharge unit 400.
The uncoiling unit 50, leveling unit 60, bonding unit 70, drying unit 80 and cooling unit 90 perform a process for manufacturing the strip 200 by coating an adhesive on the surface, back surface or both surfaces of the steel sheet 200A. The lamination core manufacturing unit 100, lamination unit 300 and discharge unit 400 perform a process for forming the strip 200 and manufacturing and discharging a lamination core.
The uncoiling unit 50 includes a reel 51 on which the steel sheet 200A is wound. The steel sheet 200A wound on the reel 51 is unwound and supplied while the reel 51 rotates. The supplied steel sheet 200A is deformed into a curved shape while being wound on the reel. In order to level the deformed steel sheet 200A, the steel sheet is supplied to the leveling unit 60 installed at one side of the uncoiling unit 50. The steel sheet 200A supplied to the leveling unit 60 is leveled while passing through a leveler 61.
The steel sheet 200A passing through the leveler 61 is supplied to the bonding unit 70 installed at one side of the leveling unit 60. The bonding unit 70 includes an application device 71, and the application device 71 in the shape of a roller or a sprayer, etc., applies an adhesive to the surface, back surface or both surfaces of the steel sheet.
The steel sheet 200A with the adhesive applied thereto is supplied to the drying unit 80 installed at one side of the bonding unit 70. The adhesive applied to the steel sheet is dried while passing through the drying unit 80. Preferably, the drying unit 80 includes a first dryer 81 and a second drier 82. More preferably, the first drier 81 is a drier using the radiant heat of a heater, and the second drier 82 is a drier using the warm current of air. The drying unit 80 is not limited to the way including two driers, but may use various drying ways according to need.
The steel sheet 200A passing the drying unit 80 passes through the cooling unit 90 installed at one side of the drying unit 80. The cooling unit 90 includes a cooler 91. The cooler 91 preferably supplies cool air of room temperature or below to the surface of the steel sheet 200A such that the adhesive is completely coated on the surface of the steel sheet. The steel sheet 200A coated with the adhesive now becomes the strip 200, and the strip 200 is supplied to the lamination core manufacturing unit 100 installed at one side of the cooling unit 90.
When lamina members are formed in the lamination core manufacturing unit 100 according to the present invention, multiple lamina members are stacked in the lamination unit 300, to manufacture a lamination core. The lamination unit 300, as a part of the lamination core manufacturing unit 100, is installed below the blanking die. The lamination core stacked in the lamination unit 300 is discharged through the discharge unit 400 installed below the lamination unit 300.
Fig. 4 is a schematic cross-sectional side view illustrating the lamination core manufacturing unit 100 according to the present invention.
The lamination core manufacturing unit 100 according to the present invention includes an upper mold 10 and a lower mold 20. In the upper mold 10, a first piercing punch 11, a second piercing punch 12, a third piercing punch 13, a fourth piercing punch 14, and a fifth piercing punch 15 are sequentially installed for successive piercing stages, and then a blanking punch 16 is installed.
The lower mold 20 corresponding to the upper mold 10 includes a die plate 21, a die backing plate 22 and a die holder 23. In the die plate 21, a first piercing die 211, a second piercing die 212, a third piercing die 213, a fourth piercing die 214 and a fifth piercing die 215 are installed at the locations corresponding to the first to fifth piercing punches of the upper mold 10. A blanking die 24 is installed at one side of the fifth piercing die 215. The first to fifth piercing punches and the first to fifth piercing dies sequentially form a strip into the shape of lamina member through five successive piercing stages.
The specification and drawings of the present invention illustrate and describe five piercing stages, but do not necessarily limit the five piercing stages. That is, according to the shape of lamina member for a lamination core manufactured, the piercing may include a plurality of stages, not five stages, that is, two stages, three stages, four stages, six stages or more than six stages. Therefore, the five piercing stages described in the specification and drawings of the present invention should be construed as being provided for the sake of convenience of explanation, and the present invention covers all cases of performing a plurality of piercing stages.
In the present invention, the blanking die 24 corresponding to the blanking punch 16 is installed in the lower mold 20 to perform blanking. The lamination unit 300 is installed below the blanking die 24 such that lamina members 200-1 formed from the strip 200 are sequentially stacked in a squeeze ring 27 of the lamination unit 300 to manufacture a lamination core 200A. For the shape of the lamination core 200A, please refer to Fig. 2.
In Fig. 4, reference numeral 17 in the upper mold 10 denotes a punch plate in which each punch is installed; 17-1 denotes a striper plate for holding a strip and punching a desired shape; 18 denotes a punch backing plate; and 19 denotes a punch holder in which the punch plate is installed. These elements are essential for a press and could be easily understood by a person having ordinary knowledge in the art to which the present invention pertains, and hence detailed explanation therefor is omitted.
The blanking die 24 is a support constituting the lamination unit 300. The lamination unit 300 may include the blanking die 24, a rotation die 26 and the squeeze ring 27. When the predetermined number of sheets of lamina member 200-1 to be described later is stacked sequentially and successively in the inner circumferential surface of the squeeze ring 27, the lamination core 200 comprising the predetermined number of sheets of lamina member 200-1 is discharged from the lower portion of the squeeze ring. The squeeze ring 27 may be installed in the rotation die 26 such that the lamina members 200-1 are stacked while rotating at a certain pitch.
In the present invention, the spray unit 30 is installed in the blanking punch 16 of the upper mold 10. The spray unit 30 applies the release agent 40 to the upper surface of the blanked lamina member.
Fig. 5 is a bottom view illustrating the upper mold 10 of the adhesive lamination core manufacturing unit 100 according to the present invention.
Referring to Fig. 5, the spray unit 30 installed in the blanking punch 16 of the adhesive lamination core manufacturing unit 100 according to the present invention includes a nozzle 31 and a storage tank 32.
The nozzle 31 is installed on one side of the lower portion of the blanking punch 16 to apply the release agent 40 by spraying to the upper portion of the blanked lamina member 200-1. The nozzle 31 is connected to the storage tank 32 with a hose, etc., such that the release agent 40 stored in the storage tank 32 is supplied to the nozzle 31. Fig. 5 illustrates six nozzles; but the number of nozzles is not necessarily limited to six, and two or four, etc. nozzles may be used according to the conditions such as the size of lamina member, etc.
Upon operation of the upper mold 10, the blanking punch 16 is lowered to blank the strip, and then the shape of lamina member is formed. The release agent 40 is applied to the upper surface of the formed lamina member. A lamina member is stacked on the lamina member with the release agent 40 applied thereto in the squeeze ring 27, and then the lamina member with the release agent 40 is squeezed out to the lower portion while attaching each other.
Fig. 6 is a schematic diagram illustrating the process for stacking a lamination core in the lamination core manufacturing unit 100 according to the present invention, (a) is a view illustrating the state in which a typical adhesive is applied to the upper surface of the lamina member, (b) is a view illustrating the state in which the predetermined number of sheets of lamina member adheres to each other and stacked, and a release agent is applied to the lamina member on the uppermost portion of the lamination core and (c) is a view illustrating the separated lamination core.
As shown in Fig. 6(a), the strip coated with a common thermosetting adhesive 200B on the upper surface thereof is punched in the blanking punch 16 to manufacture a lamina member 200-1.
Fig. 6(b) illustrates sequentially stacked lamina members 200-1. Here, the drawing illustrates that a lamination core comprises ten lamina members 200-1 stacked. Since the common thermosetting adhesive 200B is applied to the lamina members 200-1, the adhesive 200B is activated to exhibit adhesive performance upon application of heat to the stacked lamina members. Thus, in another embodiment according to the present invention, a heating means 25 for heating the squeeze ring 27 in which the lamina members are stacked may be installed around the squeeze ring 27.
In order for the adhesive 200B not to exhibit adhesive performance, the release agent 40 is applied to the upper surface of the tenth lamina member. The release agent 40 is applied to the top of the adhesive 200B by spraying through the nozzle.
Accordingly, when ten lamina members are stacked, the release agent 40 is applied to the surface of the tenth lamina member 200-1. By doing so, the tenth lamina member does not adhere to the eleventh lamina member. Thus, a lamination core 200A comprises ten lamina members stacked is discharged from the lower portion of the squeeze ring 27, as illustrated in Fig. 6(c).
Fig. 6(b) illustrates that the release agent 40 is applied at certain intervals, but it is illustrated in such manner for the sake of convenience of explanation. Practically, the release agent is applied more closely and evenly.
Fig. 7 is a schematic cross-section view illustrating the discharge unit 400 used for unloading of the adhesive lamination core manufacturing unit 100 according to the present invention.
As illustrated in Fig. 7, when a lamination core stacked inside the squeeze ring 27 of the lamination unit 300 is discharged to the lower portion, the lamination core is received on a carrier 401 of the discharge unit 400. The carrier 401 is connected to a lifting means 402 operating up and down, and the lifting means 402 moves the carrier 401 up and down. When the carrier 401 moves down while loading a lamination core 200', a discharge rod 411 operates by an operation means 410 to push and discharge the lamination core 200' to an external conveyor 420. Here, preferably, a cylinder or a motor, etc. may be used as the operation means 410 and the lifting means 402.
Meanwhile, the lamination core 200' is squeezed out to the lower portion while being strongly pressed against the inner surface of the squeeze ring 27, upon stacking of a lamina member on the top thereof. In some cases, a lamination core pressed against the inside of the squeeze ring 27 is not smoothly squeezed out but is stuck inside the squeeze ring 27. In such case, the apparatus should stop operation to remove the lamination core stuck in the squeeze ring 27, and then the apparatus re-operates, which degrades productivity.
In order to solve these problems, an electromagnet 403 is installed inside or on the carrier 401 of the discharge unit 400. The electromagnet 403 operates when the carrier 401 is lifted by operation of the lifting means 402. The electromagnet 403 stops operation when the lamination core 200' is received on the carrier 401 by an attractive force of the electromagnet 403, and then the carrier 401 is lowered. The operation of the electromagnet 403 is controlled by a controller (not illustrated) electrically connected thereto.
Fig. 8 is a process flow diagram illustrating performed by the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention. Referring to Fig. 8, the process for manufacturing a lamination core performed by the apparatus for manufacturing an adhesive lamination core by adhesive coating on a strip according to the present invention is described as below.
First, during uncoiling, a steel sheet wound on the reel is unwound and supplied. Next, during leveling, the unwound steel sheet is leveled. During bonding, an adhesive is applied to the surface, back surface or both surfaces of the steel sheet. The steel sheet 200' with the adhesive applied thereto is dried during drying and cooled during cooling, to manufacture a strip coated with the adhesive.
During subsequent piercing, the plurality of piercing punches perform operation on the strip 200 passing over the corresponding piercing dies to form the shape of lamina member on the strip 200. During subsequent blanking, the strip 200 is punched to obtain a lamina member 200-1.
During spraying directly after blanking, the release agent 40 is applied through the nozzle 31 of the spray unit 30 to the upper surface of the punched lamina member 200-1.
During subsequent laminating, the lamina members 200-1 are successively laminated in the squeeze ring 27 of the lamination unit 300.
During unloading, the lamination core comprising the predetermined sheets of lamina member stacked as a product is disposed on the carrier 401 of the discharge unit 400, and then, when the carrier 401 is lowered, the lamination core 200' disposed on the conveyor 420 is discharged below the apparatus by operation of the discharge rod 411.
The explanation in the present invention provided above is merely to provide examples to help understand the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention shall be defined by the accompanying claims, and it should be interpreted that simple modifications or alternations of the present invention made within the scope of the claims fall within the scope of the present invention.

Claims (8)

  1. An apparatus for manufacturing an adhesive lamination core, comprising:
    an uncoiling unit 50 including a reel 51 on which a steel sheet is wound;
    a leveling unit 60 installed at one side of the uncoiling unit 50, including a leveler 61 leveling the steel sheet;
    a bonding unit 70 installed at one side of the leveling unit 60, including an application device 71 applying an adhesive to the steel sheet;
    a drying unit 80 installed at one side of the bonding unit 70, drying the steel sheet with the adhesive applied thereto;
    a cooling unit 90 installed at one side of the drying unit 80, cooling the steel sheet to manufacture a strip 200; and
    a lamination core manufacturing unit 100 installed at one side of the cooling unit 90, forming the strip 200 to manufacture a lamination core 200A.
  2. The apparatus for manufacturing an adhesive lamination core of claim 1, wherein the lamination core manufacturing unit 100 includes an upper mold 10 and a lower mold 20, punches mounted in the upper mold 10 performing a plurality of piercing stages on strips 200 sequentially transferred in the upper portion of the lower mold 20 to sequentially form lamina members 200-1 and blanking to sequentially manufacture lamination cores 200A comprising the predetermined number of sheets of laminar member 200-1, the lamination core manufacturing unit 100 comprising:
    a plurality of piercing punches installed in the upper mold 10 for forming the strip 200 into the lamina members 200-1;
    a plurality of piercing dies installed in the lower mold 20 to correspond to the plurality of piercing punches;
    a blanking punch 16 of the upper mold 10, installed at one side of the plurality of piercing punches;
    a blanking die 24 of the lower mold 20, installed at the location corresponding to the blanking punch 16; and
    a squeeze ring 27 installed below the blanking die, in which the lamina members 200-1 are stacked,
    wherein a discharge unit 400 discharging the lamination cores is further installed below the squeeze ring 27.
  3. The apparatus for manufacturing an adhesive lamination core of claim 2, wherein the discharge unit 400 includes a carrier 401 moving up and down by a lifting means 402.
  4. The apparatus for manufacturing an adhesive lamination core of claim 3, wherein an electromagnetic 403 is installed inside or on the carrier 401.
  5. The apparatus for manufacturing an adhesive lamination core of claim 4, wherein the electromagnetic 403 is configured to be installed below the lamination core such that the lamination core is attached to the carrier 401.
  6. The apparatus for manufacturing an adhesive lamination core of claim 2, further comprising a spray unit 30 installed in the blanking punch 16, wherein the spray unit 30 includes a plurality of nozzles 31 installed in the blanking punch 16 and a storage tank 32 connected with the plurality of nozzles, wherein the nozzle 31 sprays an activating agent 40 or a release agent 40' to the upper portion of the blanked lamina member 200-1.
  7. An adhesive lamination core manufacturing unit, the unit 100 including an upper mold 10 and a lower mold 20, punches mounted in the upper mold 10 performing a plurality of piercing stages on strips 200 sequentially transferred in the upper portion of the lower mold 20 to sequentially form lamina members 200-1 and blanking to sequentially manufacture lamination cores 200A comprising the predetermined number of sheets of laminar member 200-1, the lamination core manufacturing unit 100 comprising:
    a plurality of piercing punches installed in the upper mold 10 for forming the strip 200 into the lamina members 200-1;
    a plurality of piercing dies installed in the lower mold 20 to correspond to the plurality of piercing punches;
    a blanking punch 16 of the upper mold 10, installed at one side of the plurality of piercing punches;
    a blanking die 24 of the lower mold 20, installed at the location corresponding to the blanking punch 16;
    a squeeze ring 27 installed below the blanking die, in which the lamina members 200-1 are stacked; and
    a discharge unit 400 installed below the squeeze ring 27, discharging the lamination cores.
  8. The adhesive lamination core manufacturing unit of claim 7, wherein the discharge unit 400 includes a carrier 401 moving up and down by a lifting means 402.
PCT/KR2018/012902 2017-11-06 2018-10-29 Apparatus for manufacturing adhesive lamination core by adhesive coating on strip WO2019088618A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020170146525A KR101990296B1 (en) 2017-11-06 2017-11-06 Apparatus for Manufacturing Adhesive Lamination Core with Easy Distribution of Laminated Core
KR10-2017-0146525 2017-11-06
KR1020170146526A KR102005635B1 (en) 2017-11-06 2017-11-06 Apparatus for Manufacturing Adhesive Lamination Core by Adhesive Coating on Strip
KR10-2017-0146526 2017-11-06

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WO2019088618A1 true WO2019088618A1 (en) 2019-05-09

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WO2021204433A1 (en) * 2020-04-09 2021-10-14 Thyssenkrupp Steel Europe Ag Method for producing a lamination stack, lamination stack and electric machine

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JP2001291627A (en) * 2000-04-05 2001-10-19 Nippon Steel Corp Method and device for manufacturing iron core
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JP2021035686A (en) * 2019-08-30 2021-03-04 株式会社三井ハイテック Metal product delivery device and metal product manufacturing method
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WO2021204433A1 (en) * 2020-04-09 2021-10-14 Thyssenkrupp Steel Europe Ag Method for producing a lamination stack, lamination stack and electric machine
JP7386354B2 (en) 2020-04-09 2023-11-24 ティッセンクルップ スチール ヨーロッパ アーゲー Method of manufacturing laminated stacks, laminated stacks, and electromechanical

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