WO2012081316A1 - 積層鉄心の製造方法 - Google Patents
積層鉄心の製造方法 Download PDFInfo
- Publication number
- WO2012081316A1 WO2012081316A1 PCT/JP2011/074972 JP2011074972W WO2012081316A1 WO 2012081316 A1 WO2012081316 A1 WO 2012081316A1 JP 2011074972 W JP2011074972 W JP 2011074972W WO 2012081316 A1 WO2012081316 A1 WO 2012081316A1
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- WIPO (PCT)
- Prior art keywords
- laminated core
- mold
- resin
- manufacturing
- magnet insertion
- Prior art date
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Classifications
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- 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
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
Definitions
- the present invention relates to a method of manufacturing a laminated core in which a magnet piece is resin-sealed in a plurality of magnet insertion holes formed in an axial direction so as to be used in a motor.
- a magnet mold construction method A in which a plurality of magnet insertion holes are provided in a laminated core body of a rotor laminated core, and magnet pieces are inserted into each magnet insertion hole and fixed.
- magnet pieces 72 are placed in a plurality of magnet insertion holes 71 provided in the radially outer region of the rotor laminated core 70, heated to a certain temperature, and then inserted into the magnet insertion holes 71.
- the magnet piece 72 is fixed to the laminated core body 76 by injecting the mold resin 75 from the upper mold 73 (or the lower mold 74) and curing the mold resin 75.
- 77 is a conveyance jig
- 78 is an upper fixing plate
- 79 is a lower fixing plate
- 80 is a guide post
- 81 is a plunger.
- a metal dummy plate 82 is disposed on the surface side of the laminated core body 76, and a mold resin 75 is formed from a gate 83 that is a resin inlet formed in the dummy plate 82. Injecting. As a result, the injected mold resin 75 remains on the surface of the dummy plate 82, not on the surface side of the laminated core body 76, so that the remaining mold resin is also removed by removing the dummy plate 82 from the laminated core body 76. It has been removed.
- Reference numeral 84 denotes a resin flow path formed in the upper mold 73.
- the present invention has been made in view of such circumstances, and it is not necessary to change the mold die even for different rotor laminated cores. Therefore, it is not necessary to prepare other types of mold dies. and to provide a method for manufacturing a laminated core which is capable of shortening the lead time.
- a method for manufacturing a laminated core that meets the above-described purpose is to insert a laminated core body in which a magnet piece is inserted into a magnet insertion hole between a mold die and a holding die, and from the resin reservoir of the mold die to the magnet.
- a groove-shaped resin flow path from the resin reservoir to the magnet insertion hole is provided between the mold die and the laminated core body, and communicates with the magnet insertion hole on the downstream side of the resin flow path.
- a guide member having a gate is disposed.
- the guide member is composed of a single flat plate (for example, a metal plate such as a stainless steel plate or a steel plate), and the resin flow path is a groove that opens to the mold die side.
- the gate is preferably a through hole provided at an end of the resin flow path.
- the said guide member consists of at least 2 flat plates (for example, metal plates, such as a stainless plate and a steel plate), and the said resin flow path contacts the said mold die.
- the gate is a through-hole formed on a flat plate that penetrates the front and back surfaces, the gate being formed on a flat plate in contact with the laminated core body, and connected to the downstream side of the resin flow path.
- the gate is smaller than the magnet insertion hole in a plan view and is wrapped in the magnet insertion hole from the inside in the radial direction.
- the plan view means that the laminated core body is viewed in the axial direction.
- the mold has a plurality of resin reservoirs, and a plurality of grouped magnet insertion hole groups (one or a plurality of magnets) formed in the laminated core body. It is preferable to supply the mold resin to (having an insertion hole). Moreover, in the manufacturing method of the laminated core which concerns on this invention, it is preferable that the diameter of the said guide member is larger than the diameter of the said laminated core main body. This facilitates removal of the guide member after resin sealing.
- the following effects can be obtained. (1) Even if the type of product (that is, the laminated core) to be molded is changed in the middle of an operating production line, mold gold Molding is possible only by setting a guide member that matches the product without changing the mold, and therefore production can be performed continuously without stopping the production line. (2) That is, for a specific product type, only the guide member needs to be changed in accordance with the change of the product type, and the lead time can be shortened. (3) Since it is not necessary to manufacture a mold for each product type, the mold cost and the product cost are greatly reduced.
- (A), (B) is explanatory drawing of the guide member used for the method
- (C) is a top view of the laminated iron core manufactured by the method.
- (A), (B) is a top view of the guide member used for the manufacturing method of the laminated iron core which concerns on the 4th Example of this invention
- (C) is a top view of the laminated iron core manufactured by the same method.
- the method for manufacturing a laminated core according to the first embodiment of the present invention is performed between an upper mold 10 that is an example of a mold and a lower mold 11 that is an example of a holding mold.
- the laminated core body 14 having a plurality of pairs of magnet insertion holes 12 and 13 (see FIG. 3B) penetrating vertically is provided in the radially outer region, and a magnet piece (not excited) in each magnet insertion hole 12 and 13.
- the permanent magnet 15 is inserted, and the mold resin 19 is filled into the magnet insertion holes 12 and 13 through the guide member 18 from the resin reservoir pot 16 which is an example of the resin reservoir provided in the upper mold 10.
- the magnet piece 15 is fixed to the magnet insertion holes 12 and 13.
- the height of the magnet piece 15 is the same as the height of the laminated core body 14 or is small within a small range (0.1 to 2 mm).
- the laminated core body 14 includes a plurality of pairs (8 in this embodiment) of magnet insertion holes 12 and 13 (forming one magnet insertion hole group) as a pair, and has a mountain shape in plan view. radially inwardly of the insertion holes 12 and 13, through holes 21 for weight reduction it is formed.
- a shaft hole 22 is provided in the center of the laminated core body 14, and projecting portions 23 and 24 (see FIG. 3) having a quadrangular shape as viewed in plan are formed inside the shaft hole 22.
- the laminated core body 14 is formed by caulking and laminating iron core pieces 25 having the same shape obtained by pressing a magnetic plate material (for example, a silicon steel plate).
- the upper mold 10 has a resin reservoir pot 16 having a circular cross section at a position corresponding to the radially inner side of the pair of magnet insertion holes 13 and 12 formed in a valley shape in plan view. have.
- Each resin reservoir pot 16 has a structure in which a liquid mold resin (thermosetting resin) 19 accumulated inside is pushed out toward the laminated core body 14 by a plunger 27 that moves up and down by a cylinder (not shown).
- the guide member 18 is made of a single flat plate (for example, a stainless steel plate or a steel plate) having a thickness in the range of, for example, 0.2 to 3 mm.
- the upstream end communicates with the resin reservoir pot 16 and the downstream end is a magnet insertion hole.
- a resin flow path 31 is formed that includes a groove that opens to the bottomed upper mold 10 side that is connected to a gate 30 that is formed of a through hole formed on the inner side in the radial direction of 12, 13 (dotted line portion).
- the depth of the resin flow path 31 is in the range of 30 to 70% of the thickness of the guide member 18, and the gate 30 formed at the downstream end of the resin flow path 31 is formed of a rectangular hole so that the magnet is inserted below. It is located in the center in the radial direction of the holes 12 and 13.
- the gate 30 is not limited to a rectangular hole, and other shapes such as a round hole and a triangular hole can be employed.
- the long side length of the gate 30 is 0.3 to 0.7 times the long side length of the magnet insertion holes 12 and 13, and the short side width is 0. 0 of the short side width of the magnet insertion holes 12 and 13. 3 to 0.7 times.
- the guide member 18 has a diameter that is 1 to 10% larger than the diameter of the laminated core body 14, and a shaft hole 32 having the same diameter as the shaft hole 22 of the laminated core body 14 is provided inside. Inside the shaft hole 32, protrusions 33 and 34 that are the same as the protrusions 23 and 24 provided inside the shaft hole 22 are provided.
- the laminated core body 14 is positioned and sandwiched between the lower mold 11 and the upper mold 10 while being placed on the conveying jig 36.
- the conveying jig 36 includes a mounting table 37 and a guide shaft 38 disposed at the center thereof.
- the guide shaft 38 is longer than the height of the laminated core body 14, and the upper end thereof is chamfered 39. Is formed.
- the upper mold 10 is provided with a hole 40 into which the guide shaft 38 is fitted.
- key grooves 41, 42 into which the projecting portions 23, 24, 33, 34 are closely fitted are provided. Note that a key groove may be formed on the outer periphery of the shaft hole of the laminated iron core, and a projecting portion into which the key groove is fitted may be provided on the guide shaft.
- the guide member 18 is placed on the laminated core body 14 that has been preheated and mounted on the conveying jig 36, and is disposed between the upper mold 10 and the lower mold 11.
- the upper die 10 is lowered, and the laminated core body 14 and the guide member 18 are positioned by fitting the guide shaft 38 of the conveying jig 36 into the hole 40 of the upper die 10.
- the plunger 27 is pushed down by a cylinder (not shown), the molten mold resin 19 in the resin reservoir pot 16 is pushed downward, and the mold resin is inserted into the magnet insertion holes 12 and 13 from the resin flow path 31 through the gate 30. 19 is filled. Since the gate 30 is provided so as to wrap from the inside in the radial direction of the magnet insertion holes 12 and 13, the magnet piece 15 is pushed outward in the radial direction of the magnet insertion holes 12 and 13.
- the mold resin 19 is made of a thermosetting resin, it is heated and cured by the preheated laminated core body 14. Thereafter, when the upper mold 10 is raised and the guide member 18 is removed from the laminated core body 14, the hardened mold resin 19 is also broken at or near the gate 30 portion. This operation may be performed on the lower mold 11 or may be performed by moving the conveying jig 36 to another position.
- the manufacturing method of the laminated core according to the second embodiment of the present invention shown in FIGS. 4A and 4B will be described with respect to differences from the manufacturing method of the laminated core according to the first embodiment.
- the laminated core body 44 is further provided with a magnet insertion hole 45 to form eight magnet insertion hole groups. Therefore, the guide member 47 mounted on the laminated core body 44 also has a resin flow path 48 and a gate 49 corresponding to the magnet insertion hole 45.
- the operation procedure of the method for manufacturing a laminated core according to the second embodiment is the same as the method for manufacturing the laminated core according to the first embodiment, detailed description thereof is omitted.
- two or three magnet insertion holes are filled with resin from one resin reservoir pot, but one magnet insertion hole, or four or more magnet insertion holes from one resin reservoir pot.
- the present invention is also applied to the case where the resin is filled in.
- the manufacturing method of the laminated core which concerns on the 3rd Example of this invention is demonstrated, referring FIG. 5, FIG. Since the upper mold and the lower mold are the same as the method for manufacturing the laminated core according to the first embodiment, detailed description thereof is omitted. Moreover, although the conveyance jig of the laminated core body is omitted in the following embodiments, it is preferably used as in the first embodiment. In addition, the same constituent elements as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted (the same applies to the fourth embodiment).
- the laminated core body 14 on which the guide member 51 is placed is disposed between the upper mold 10 and the lower mold 11.
- the magnet insertion holes 12 and 13 are provided.
- the guide member 51 is composed of, for example, two stainless steel circular flat plates 52 and 53 each having a thickness of 0.2 to 2 mm, and the flat plate 52 in contact with the resin reservoir pot 16 extends from the resin reservoir pot 16.
- a resin flow path 55 to the gate 54 on the downstream side is formed, and the above-described gate 54 is formed on the flat plate 53 in contact with the laminated core body 14 to flow resin into the magnet insertion holes 12 and 13 formed in the laminated core body 14. ing.
- the resin flow path 55 is formed through the flat plate 52 in the vertical direction, and the gate 54 is formed through the flat plate 53 in the vertical direction (as a through hole).
- the gate 54 is located at the radially inner center of the magnet insertion holes 12 and 13 in plan view.
- the upstream side of the resin flow path 55 communicates with the resin reservoir pot 16, and the downstream side communicates with the gate 54.
- the two flat plates 52 and 53 are integrated to perform the same function as the guide member 18 provided with the resin flow path 31 and the gate 30 in the first embodiment.
- the diameter of the flat plates 52 and 53 is larger than the diameter of the laminated core main body 14, and removal is easy.
- the guide member 51 is used in the same manner as in the first embodiment. In removing the guide member 51, the two flat plates 52 and 53 are removed at the same time, and the mold resin accumulated in the resin flow path 55 is easily removed by separating the flat plates 52 and 53. it can.
- the conveyance jig 36 which is not described in FIG. 5, when providing positioning means (for example, a concave portion and a convex portion) capable of positioning the guide member 51 and the laminated core body 14, A conveyance jig can be omitted.
- 6 (A) and 6 (B) indicate protrusions
- 59 and 60 indicate shaft holes.
- the laminated core body 44 used in the method for manufacturing a laminated core according to the second embodiment is used.
- two flat plates 63 and 64 constituting the guide member 62 are used, and the gate 54 on the downstream side from the resin reservoir pot formed in the upper die on the flat plate 63 is used.
- 65 are connected to resin flow paths 55, 66.
- the flat plate 64 includes the gates 54 and 65 described above, and the gates 54 and 65 are aligned with the radially inner centers of the magnet insertion holes 12, 13, and 45 of the laminated core body 44.
- the guide member 62 is placed on the laminated core body 44 in which the predetermined magnet piece 15 is placed in the magnet insertion holes 12, 13, 45, and is sandwiched between the upper mold and the lower mold, and is removed from the resin reservoir pot.
- the mold resin is filled into the magnet insertion holes 12, 13, 45 through the resin flow paths 55, 66 and the gates 54, 65.
- the magnet piece 15 is fixed to the magnet insertion holes 12, 13, 45.
- the molding resin is removed without remaining on the laminated core body 44.
- the guide members 18, 47, 51, 62 As described above, by manufacturing the guide members 18, 47, 51, 62 according to the shape of the laminated core body, it is not necessary to change the shape of the mold, so that the manufacturing cost of the mold can be reduced. Further, since the guide members 18, 47, 51, 62 may be exchanged according to the shape of the laminated core body, the apparatus can be easily changed even when the laminated core body is changed. Furthermore, when the guide member is composed of two or more flat plates, there are cases where only one of them can be changed in accordance with the shape of the laminated core body.
- the resin reservoir pot is provided in the upper mold.
- the specific dimension was shown and demonstrated, you may change a numerical value in the range which does not change the summary of this invention.
- the method for manufacturing a laminated core according to the present invention has been described using the first to fourth embodiments, the present invention can also be configured by combining the first to fourth embodiments.
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Abstract
Description
前記モールド金型と前記積層鉄心本体との間に、前記樹脂溜め部から前記磁石挿入孔に向かう溝形の樹脂流路を有し、該樹脂流路の下流側には前記磁石挿入孔に通ずるゲートを備えたガイド部材を配置している。
ここで、積層鉄心本体が垂直方向に立設されている場合、モールド金型は積層鉄心本体の上又は下に配置し、これに対応してガイド部材を積層鉄心本体の上又は下に配置することになる。
また、本発明に係る積層鉄心の製造方法において、前記ガイド部材の直径は前記積層鉄心本体の直径より大きいのが好ましい。これによって、樹脂封止後のガイド部材の取外しが容易となる。
(1)稼働中の製造ラインにおいて、途中からモールドする製品(即ち、積層鉄心)種が変更になっても、モールド金型を交換せず、製品に合わせたガイド部材をセットするだけでモールドが可能となるので、製造ラインを停止することなく、連続して生産を行うことができる。
(2)即ち、特定の製品種においては、製品種の変更に伴いガイド部材の交換のみで済む場合があり、リードタイムの短縮が可能となる。
(3)製品種毎にモールド金型を製作する必要がないので、金型コスト及び製品コストの大幅減となる。
ガイド部材18はその直径が積層鉄心本体14の直径より1~10%の範囲で大きくなって、内部に積層鉄心本体14の軸孔22と同一直径の軸孔32が設けられている。この軸孔32の内側には、軸孔22の内側に設けられている突出部23、24と同一の突出部33、34が設けられている。
搬送治具36は、図2に示すように、載置台37とその中央に配置されたガイド軸38とを有し、ガイド軸38は積層鉄心本体14の高さより長くなって、上端は面取り39が形成されている。なお、上型10にはこのガイド軸38が嵌入する穴40が設けられている。ガイド軸38の径方向両側には、突出部23、24、33、34が密着嵌入するキー溝41、42が設けられている。なお、積層鉄心の軸孔外周にキー溝を形成し、ガイド軸にキー溝が嵌入する突出部を設けてもよい。
予熱されて搬送治具36に搭載された積層鉄心本体14の上にガイド部材18を重ねて、上型10及び下型11の間に配置する。上型10を降ろして、積層鉄心本体14及びガイド部材18は搬送治具36のガイド軸38が上型10の穴40に嵌入することによって位置決めされる。
この後、上型10を上昇させて、ガイド部材18を積層鉄心本体14の上から外すと、固まったモールド樹脂19もゲート30部分又はその近傍で破断する。この作業は下型11の上で行ってもよいし、搬送治具36を別位置に移動させて行ってもよい。
これらの実施例においては、2又は3の磁石挿入孔に対して一つの樹脂溜めポットから樹脂を充填しているが、一つの樹脂溜めポットから一つの磁石挿入孔、又は4以上の磁石挿入孔に樹脂を充填する場合も本発明は適用される。
これによって、2枚の平板52、53は一体となって、第1の実施例における樹脂流路31及びゲート30が設けられたガイド部材18と同一の働きをする。なお、平板52、53の直径は積層鉄心本体14の直径より大きく、除去が容易となっている。
なお、図5には記載していない搬送治具36を使用するのが好ましいが、ガイド部材51と積層鉄心本体14の位置決めができる位置決め手段(例えば、凹部と凸部)を設ける場合には、搬送治具を省略できる。また、図6(A)、(B)において、57、58は突出部を、59、60は軸孔を示す。
また、積層鉄心本体の形状に応じてガイド部材18、47、51、62を交換すればよいので、積層鉄心本体が変わった場合も簡単に装置替えができる。
更に、ガイド部材が2枚以上の平板からなる場合は、積層鉄心本体の形状に合わせて、これらの一つのみを変更して対応できる場合もある。
更に、前記実施例においては、具体的寸法を示して説明したが、本発明の要旨を変更しない範囲で数値変更をしてもよい。
また、第1~第4の実施例を用いて本発明に係る積層鉄心の製造方法を説明したが、第1~第4の実施例を組み合わせて本発明を構成することもできる。
Claims (6)
- モールド金型と保持金型の間に、磁石挿入孔に磁石片が挿入された積層鉄心本体を入れて、前記モールド金型の樹脂溜め部から前記磁石挿入孔にモールド樹脂を充填して、前記磁石片を前記磁石挿入孔に固定する積層鉄心の製造方法において、
前記モールド金型と前記積層鉄心本体との間に、前記樹脂溜め部から前記磁石挿入孔に向かう溝形の樹脂流路を有し、該樹脂流路の下流側には前記磁石挿入孔に通ずるゲートを備えたガイド部材を配置したことを特徴とする積層鉄心の製造方法。 - 請求項1記載の積層鉄心の製造方法において、前記ガイド部材は1枚の平板からなって、前記樹脂流路は前記モールド金型側に開く溝からなって、前記ゲートは前記樹脂流路の端部に設けられた貫通孔であることを特徴とする積層鉄心の製造方法。
- 請求項1記載の積層鉄心の製造方法において、前記ガイド部材は少なくとも2枚の平板からなって、前記樹脂流路は、前記モールド金型に接する平板に表裏貫通して形成され、前記ゲートは前記積層鉄心本体に接する平板に形成され、前記樹脂流路の下流側に接続される貫通孔であることを特徴とする積層鉄心の製造方法。
- 請求項1~3のいずれか1記載の積層鉄心の製造方法において、前記ゲートは、平面視して前記磁石挿入孔より小さくなって、しかも前記磁石挿入孔に半径方向内側からラップすることを特徴とする積層鉄心の製造方法。
- 請求項1~4のいずれか1記載の積層鉄心の製造方法において、前記モールド金型には複数の前記樹脂溜め部があって、前記積層鉄心本体に形成されたグループ分けされた複数の磁石挿入孔群に前記モールド樹脂を供給していることを特徴とする積層鉄心の製造方法。
- 請求項1~5のいずれか1記載の積層鉄心の製造方法において、前記ガイド部材の直径は前記積層鉄心本体の直径より大きいことを特徴とする積層鉄心の製造方法。
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US13/885,050 US9947464B2 (en) | 2010-12-14 | 2011-10-28 | Method of manufacturing laminated core |
EP11848352.8A EP2654187A4 (en) | 2010-12-14 | 2011-10-28 | PROCESS FOR PRODUCING LAMINATED IRON CORE |
CN201180039207.4A CN103069698B (zh) | 2010-12-14 | 2011-10-28 | 叠积式铁心的制造方法 |
US15/912,675 US10283264B2 (en) | 2010-12-14 | 2018-03-06 | Method of manufacturing laminated core |
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JP2010278335A JP5805385B2 (ja) | 2010-12-14 | 2010-12-14 | 積層鉄心の製造方法 |
JP2010-278335 | 2010-12-14 |
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US13/885,050 A-371-Of-International US9947464B2 (en) | 2010-12-14 | 2011-10-28 | Method of manufacturing laminated core |
US15/912,675 Division US10283264B2 (en) | 2010-12-14 | 2018-03-06 | Method of manufacturing laminated core |
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EP (1) | EP2654187A4 (ja) |
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Also Published As
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US20180204676A1 (en) | 2018-07-19 |
US10283264B2 (en) | 2019-05-07 |
EP2654187A4 (en) | 2016-03-23 |
EP2654187A1 (en) | 2013-10-23 |
JP2012130130A (ja) | 2012-07-05 |
CN103069698B (zh) | 2015-11-25 |
US9947464B2 (en) | 2018-04-17 |
US20130234363A1 (en) | 2013-09-12 |
CN103069698A (zh) | 2013-04-24 |
JP5805385B2 (ja) | 2015-11-04 |
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