JP2005028285A - Minute magnetic material removing apparatus - Google Patents

Minute magnetic material removing apparatus Download PDF

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Publication number
JP2005028285A
JP2005028285A JP2003196250A JP2003196250A JP2005028285A JP 2005028285 A JP2005028285 A JP 2005028285A JP 2003196250 A JP2003196250 A JP 2003196250A JP 2003196250 A JP2003196250 A JP 2003196250A JP 2005028285 A JP2005028285 A JP 2005028285A
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JP
Japan
Prior art keywords
magnetic
magnetic substance
minute
width direction
magnetic material
Prior art date
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JP2003196250A
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Japanese (ja)
Inventor
Kantaro Kaneko
貫太郎 金子
Yoshinori Miura
由則 三浦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurimoto Ltd
Mitec Corp
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Kurimoto Ltd
Mitec Corp
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Priority to JP2003196250A priority Critical patent/JP2005028285A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a minute magnetic material removing apparatus which can surely and efficiently remove contaminated minute magnetic materials even from granular substance transported at fast transportation speed. <P>SOLUTION: The minute magnetic material removing apparatus is constituted by successively disposing from an upstream side a gate 6 which levels transported granular substance to thin layer thickness along a belt conveyor 3 for transporting the granular substance, a plurality of magnetic sensors 7 which are arranged in the width direction of a transportation surface and detect the minute magnetic materials contaminated in the granular substance and a plurality of suction nozzles 8 which are arranged in the width direction of the transportation surface so as to correspond to these magnetic sensors 7. Further in the apparatus, a controller 9 performs tracking of the minute magnetic material detected by each magnetic sensor 7 to a position of the corresponding suction nozzle 8 and makes the corresponding suction nozzle 8 operate, and thus the minute magnetic material contaminated in the granular substance can be surely and efficiently removed in a pinpoint manner without lowering transportation speed of the belt conveyor 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、粉体や粒状体(以下、粉粒体と称する)に混入する微小磁性物を除去する微小磁性物除去装置に関するものである。
【0002】
【従来の技術】
リチウムイオン電池用正極素材、半導体封止用素材、石英ガラス原料、液晶組成物、医薬品、食品、化学品等の粉粒体には、その破砕工程等で金属摩耗粉等の微小な磁性物が混入することがある。このような素材原料に混入した微小磁性物は、製品の機能や品質を著しく低下させるので、確実に除去する必要がある。例えば、リチウムイオン電池用正極素材については、素材の粉粒体を搬送する空気搬送配管を磁性材で形成して磁石手段により磁化し、素材に混入した磁性物を空気搬送配管に吸着除去する方法が提案され(特許文献1参照)、半導体封止用素材については、回転する磁石ドラムの上方から素材の粉粒体を落下させ、磁性物を磁石ドラムで吸着除去する方法が提案されている(特許文献2参照)。また、石英ガラス原料については、原料粉を搬送するベルトコンベアの排出側プーリを磁気ドラムとし、磁性物を非磁性の原料粉と分離して手前に落下させる方法が提案されている(特許文献3参照)。
【0003】
一方、粉粒体からの比較的大きい異物の除去装置としては、搬送コンベア上を広げられた状態で搬送される粒状体に混入する異物(金属片)を検出する異物検出手段(X線検査装置)と、その搬送コンベア上の位置を検出する搬送位置検出手段(画像処理装置)とを備え、検出された異物を吸引するバキュームヘッドを移動手段(ロボット)で移動させるようにしたものがある(特許文献4参照)。
【0004】
【特許文献1】
特開2001−243947号公報(第4−6頁、第2−4図)
【特許文献2】
特開2000−136289号公報(第5−9頁、第6−7図)
【特許文献3】
特開2001−137740号公報(第4−6頁、第1−3図)
【特許文献4】
特開2002−1231号公報(第2−3頁、第1−3図)
【0005】
【発明が解決しようとする課題】
上述した特許文献1乃至3に記載された微小磁性物を磁石の吸着力を利用して除去する方法は、磁性物のみを除去できる利点を有するが、微小な磁性物が粉粒体に紛れ込んで後工程に送られる恐れがあり、確実には微小磁性物を除去できない問題がある。
【0006】
一方、特許文献4に記載された搬送コンベア上の異物とその位置を検出して、移動可能なバキュームヘッドで吸引する方法は、異物の存在を確実に検知することはできるが、異物が搬送コンベア上の複数箇所で検出されたときに、バキュームヘッドの移動に時間がかかり、搬送コンベアの搬送速度を非常に遅くするか、一時停止する必要がある。このため、分速数mから数十m程度の速い搬送速度を必要とされるリチウムイオン電池用正極素材や半導体封止用素材等の搬送ラインには適用できない。
【0007】
そこで、この発明の課題は、速い搬送速度で搬送される粉粒体であっても、混入した微小磁性物を確実に効率よく除去できる微小磁性物除去装置を提供することである。
【0008】
【課題を解決するための手段】
上記の課題を解決するために、この発明は、粉粒体を所定幅の搬送面上で搬送する搬送ラインに沿って、前記搬送される粉粒体に混入する微小磁性物を検出する磁性物検出手段と、磁性物検出手段で検出された微小磁性物を除去する磁性物除去手段とを上流側から順に配設した微小磁性物除去装置において、前記磁性物検出手段を前記搬送面の幅方向に配列した複数の磁気センサとし、前記磁性物除去手段をこの磁気センサの幅方向配列に対応させて配列した複数の独立な作動端で形成し、前記各磁気センサで検出された微小磁性物を、検出した磁気センサに対応する前記作動端の位置までトラッキングしてこの作動端を作動させ、前記粉粒体に混入する微小磁性物をピンポイントで除去する構成を採用した。
【0009】
すなわち、磁性物検出手段を搬送面の幅方向に配列した複数の磁気センサとして、磁性物除去手段をこの磁気センサの配列に対応させた複数の独立な作動端で形成し、各磁気センサで検出された微小磁性物を、その対応する磁性物除去手段の作動端の位置までトラッキングしてこの作動端を作動させることにより、搬送装置の搬送速度を低下させることなく、粉粒体に混入する微小磁性物をピンポイントで確実に効率よく除去できるようにした。
【0010】
前記磁性物除去手段の作動端としては、前記搬送面に近接させてその幅方向に配列され、前記微小磁性物を吸引して除去する複数の吸引ノズルを採用することができる。
【0011】
前記吸引ノズルの負圧発生源を、空気の一次流で吸引二次流を発生させる空気エジェクタとすることにより、吸引ノズルの吸引応答性を高いものとすることができる。
【0012】
前記磁性物除去手段の作動端としては、前記搬送面の排出端に近接させてその幅方向に配列され、前記微小磁性物をブローして除去する複数のエア噴射ノズルも採用することができる。
【0013】
前記磁性物検出手段の上流側に、前記搬送面上を搬送される粉粒体を薄い層厚に均す層厚調整手段を設けることにより、微小磁性物の検出精度を安定して高めることができ、磁性物検出手段としての各磁気センサも小容量でコンパクトなものとすることができる。
【0014】
【発明の実施の形態】
以下、図1乃至図8に基づき、この発明の実施形態を説明する。図1乃至図6は、第1の実施形態を示す。図1および図2は、実施形態の微小磁性物除去装置を配設したリチウムイオン電池用正極素材である粉粒体の搬送ラインを示す。この搬送ラインは、粉粒体が投入されるホッパ1と、ホッパ1の下端から粉粒体を送り出す振動フィーダ2と、振動フィーダ2で送り出された粉粒体を受け取って排出端に搬送するベルトコンベア3と、その排出端に搬送された粉粒体が投入されるシュート4および製品回収部5とで構成されている。ベルトコンベア3の両サイドには、粉粒体の搬送幅を規制するサイドガイド3aが設けられている。なお、ベルトコンベア3は振動フィーダ2よりも高速の搬送速度に設定され、振動フィーダ2から受け取る粉粒体の層厚を薄くして搬送するようになっている。
【0015】
前記微小磁性物除去装置は、ベルトコンベア3の搬送ラインに沿って、振動フィーダ2から受け取った粉粒体を薄い層厚に均す層厚調整手段としてのゲート6と、粉粒体に混入する微小磁性物を検出する磁性物検出手段としての複数の磁気センサ7と、磁性物除去手段の作動端としての複数の吸引ノズル8とを上流側から順に配設したものであり、各磁気センサ7の検出出力に基づいて各吸引ノズル8を作動させるコントローラ9も設けられている。また、ベルトコンベア3の排出端の手前には、シュート4に投入される粉粒体に微小磁性物が残存していないことを確認するための磁気センサ10も設けられている。
【0016】
前記各磁気センサ7は、センサヘッドの基板上に金属磁性材料の薄膜をツヅラ折れのミアンダ形状に形成した大きさが2mm角程度の薄膜状で、磁気インピーダンス効果を利用して磁気を検出する非接触式のものであり、図3(a)、(b)に示すように、ベルトコンベア3を跨ぐフレーム11の搬送面に近接する下面に、磁石を有する支持台7aを介して取り付けられている。これらの磁気センサ7は、ベルトコンベア3の搬送幅の全長に渡って微小磁性物を隈なく検出できるように、n個のものが2列の千鳥状で幅方向に検出区間の隙間がないように配列されている。この配列は幅方向の検出区間の隙間がなければよく、3列以上の配列や千鳥状以外の配列としてもよい。図示は省略するが、確認用の磁気センサ10も同様の構成とされている。
【0017】
前記各吸引ノズル8は、図4および図5に示すように、エジェクタ12を介して微小磁性物の異物回収部13に接続され、エジェクタ12には電磁弁8aを備えた空気管14が接続されている。ベルトコンベア3の搬送面に吸引口が近接する各吸引ノズル8は、各磁気センサ7のセンサヘッドと1:1に対応する幅方向位置で、搬送方向に少しずつ位置をずらして斜め方向へ2列に配列されている。
【0018】
前記コントローラ9には、図1に示したように、各磁気センサ7、10、ベルトコンベア3の搬送速度Vを検出するエンコーダ(図示省略)、および各吸引ノズル8の電磁弁8aに接続されており、前記1:1に対応する各磁気センサ7と吸引ノズル8間の搬送距離L(i=1〜n)が予め入力されている。なお、エンコーダはベルトコンベア3の駆動ローラ3bの回転速度を検出するようになっており、この回転速度からベルトコンベア3の搬送速度Vが求められる。
【0019】
前記コントローラ9は、いずれかの磁気センサ7で粉粒体に混入する微小磁性物が検出されたときに、ベルトコンベア3の搬送速度Vと前記該当する搬送距離Lとから、図6(a)に示すように、検出された微小磁性物Mが対応する吸引ノズル8の直下に到達する時間をトラッキングし、このトラッキングしたタイミングでその電磁弁8aを瞬間的に開けるように作動する。電磁弁8aが開けられると、前記エジェクタ12内に空気管14からの圧縮空気が異物回収部13に向かって一次流として流れ、この一次流により吸引ノズル8の吸引口に吸引二次流が発生して、図6(b)に示すように、その直下の微小磁性物Mを含む粉粒体Aがピンポイントで吸引ノズル8に吸引される。吸引された微小磁性物Mを含む粉粒体Aは、異物回収部13に回収されることにより除去される。上述したように、吸引ノズル8は各磁気センサ7に対応して独立に設けられているので、同時に複数の磁気センサ7が微小磁性物を検出しても、これらを確実に除去することができる。
【0020】
このようにして微小磁性物を除去された粉粒体は、ベルトコンベア3の排出端に搬送され、前記確認用の磁気センサ10で微小磁性物の混入がないことを確認されたのち、シュート4から製品回収部5に投入される。なお、万が一、磁気センサ10で微小磁性物の残存が検出されたときは、コントローラ9はベルトコンベア3を非常停止するとともに警報信号を発する。
【0021】
図7および図8は、第2の実施形態を示す。この微小磁性物除去装置もベルトコンベア3で搬送される粉粒体から微小磁性物を除去するものであり、磁性物除去手段の作動端を、ベルトコンベア3の排出端に近接させて幅方向に配列したエア噴射ノズル15とした点が第1の実施形態と異なる。磁性物検出手段としての磁気センサ7は、第1の実施形態のものと同様に、2列の千鳥状で幅方向に配列され、各エア噴射ノズル15を作動させるコントローラ9に接続されている。図示は省略するが、各エア噴射ノズル15は、電磁弁を介してコンプレッサ等のエア源に接続されている。また、上流側の層厚調整手段としてのゲート等の構成は第1の実施形態のものと同じである。
【0022】
前記エア噴射ノズル15は、排出端で斜め下方に逃げるベルトコンベア3のベルトの下側に、排出端から落下する粉粒体へ斜め上方に向けて、2列で千鳥状に配列されている。これらのエア噴射ノズル15も、第1の実施形態の吸引ノズル8と同様に、各磁気センサ7と1:1に対応する幅方向位置で配列されている。いずれかの磁気センサ7で粉粒体に混入する微小磁性物が検出されると、コントローラ9は、前記ベルトコンベア3の搬送速度Vと該当する磁気センサ7から排出端までの搬送距離Lに基づいて、検出された微小磁性物が排出端から落下する時間をトラッキングし、対応するエア噴射ノズル15を瞬間的に開けるように作動して、微小磁性物を含むその周りの粉粒体をピンポイントで吹き飛ばす。したがって、吹き飛ばされた微小磁性物は、排出端から離れたシュート4bから異物回収部16に落下し、微小磁性物を除去された粉粒体は、排出端の直下のシュート4aから製品回収部5に回収される。
【0023】
上述した各実施形態では、磁性物除去手段の作動端である吸引ノズルやエア噴射ノズルを、1:1で磁気センサに対応させて配列したが、1つずつの作動端を2つ以上の磁気センサに対応させて配列し、磁性物除去手段の作動端の数を減らすようにしてもよい。
【0024】
また、磁気センサや磁性物除去手段の作動端は、実施形態のものに限定されることはなく、それぞれ搬送幅方向の狭い範囲に限定して、微小磁性物の検出や除去が可能なものであればよい。さらに、本発明に係る微小磁性物除去装置は、ベルトコンベアのほかに、粉粒体を所定幅の搬送面上で搬送する振動フィーダや回転テーブル等の搬送ラインにも配設することができる。
【0025】
【発明の効果】
以上のように、この発明の微小磁性物除去装置は、磁性物検出手段を搬送面の幅方向に配列した複数の磁気センサとして、磁性物除去手段をこの磁気センサの配列に対応させた複数の独立な作動端で形成し、各磁気センサで検出された微小磁性物を、その対応する磁性物除去手段の作動端の位置までトラッキングしてこの作動端を作動させるようにしたので、搬送装置の搬送速度を低下させることなく、粉粒体に混入する微小磁性物をピンポイントで確実に効率よく除去することができ、製品の回収率を高くすることができる。
【0026】
また、前記磁性物検出手段の上流側に、搬送面上を搬送される粉粒体を薄い層厚に均す層厚調整手段を設けることにより、微小磁性物の検出精度を安定して高めることができ、磁性物検出手段としての各磁気センサも小容量でコンパクトなものとすることができる。
【図面の簡単な説明】
【図1】粉粒体の搬送ラインに配設した第1の実施形態の微小磁性物除去装置を示す正面図
【図2】図1の平面図
【図3】aは図1のIII−III線に沿った断面図、bはaの平面図
【図4】図1のIV−IV線に沿った断面図
【図5】図2の磁気センサと吸引ノズルの配列関係を説明する平面図
【図6】aは微小磁性物を検出した磁気センサに対応する吸引ノズルが作動する直前の状態を示す拡大断面図、bはaの作動直後の状態を示す拡大断面図
【図7】第2の実施形態の微小磁性物除去装置を示す一部省略正面図
【図8】図7の一部省略側面図
【符号の説明】
1 ホッパ
2 振動フィーダ
3 ベルトコンベア
3a サイドガイド
3b 駆動ローラ
4、4a、4b シュート
5 製品回収部
6 ゲート
7 磁気センサ
7a 支持台
8 吸引ノズル
8a 電磁弁
9 コントローラ
10 磁気センサ
11 フレーム
12 エジェクタ
13 異物回収部
14 空気管
15 エア噴射ノズル
16 異物回収部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fine magnetic substance removing device that removes a fine magnetic substance mixed in a powder or a granular material (hereinafter referred to as a granular material).
[0002]
[Prior art]
Fine magnetic materials such as metal wear powders in the crushing process etc. are used for powder materials such as cathode materials for lithium-ion batteries, semiconductor sealing materials, quartz glass materials, liquid crystal compositions, pharmaceuticals, foods, and chemicals. May be mixed. Such a fine magnetic material mixed in the raw material of the material significantly deteriorates the function and quality of the product, so it must be surely removed. For example, for a positive electrode material for a lithium-ion battery, a method of forming an air conveyance pipe for conveying a granular material of the material from a magnetic material, magnetizing it with a magnet means, and adsorbing and removing the magnetic substance mixed in the material to the air conveyance pipe Is proposed (see Patent Document 1), and a method for dropping a granular material from above a rotating magnet drum and adsorbing and removing the magnetic material with the magnet drum is proposed (see Patent Document 1) ( Patent Document 2). As for quartz glass raw material, a method has been proposed in which a discharge pulley of a belt conveyor for conveying raw material powder is a magnetic drum, and a magnetic material is separated from nonmagnetic raw material powder and dropped to the front (Patent Document 3). reference).
[0003]
On the other hand, as a device for removing relatively large foreign matter from the granular material, foreign matter detection means (X-ray inspection device) for detecting foreign matter (metal piece) mixed in the granular material conveyed while being spread on the conveyor ) And a transport position detecting means (image processing device) for detecting a position on the transport conveyor, and a vacuum head for sucking the detected foreign matter is moved by a moving means (robot) ( (See Patent Document 4).
[0004]
[Patent Document 1]
JP 2001-243947 A (page 4-6, Fig. 2-4)
[Patent Document 2]
JP 2000-136289 A (pages 5-9, 6-7)
[Patent Document 3]
JP 2001-137740 A (page 4-6, FIG. 1-3)
[Patent Document 4]
JP 2002-1231 A (page 2-3, FIG. 1-3)
[0005]
[Problems to be solved by the invention]
Although the method of removing the micro magnetic material described in Patent Documents 1 to 3 using the magnet's attractive force described above has an advantage that only the magnetic material can be removed, the micro magnetic material is mixed into the powder. There is a risk of being sent to a subsequent process, and there is a problem that the minute magnetic material cannot be removed reliably.
[0006]
On the other hand, the method of detecting the foreign matter on the conveyor and the position thereof described in Patent Document 4 and sucking it with a movable vacuum head can reliably detect the presence of the foreign matter. When it is detected at a plurality of locations above, it takes time to move the vacuum head, and it is necessary to slow down or temporarily stop the transport speed of the transport conveyor. For this reason, it cannot be applied to a transport line for a lithium ion battery positive electrode material, a semiconductor sealing material, or the like that requires a high transport speed of several meters to several tens of meters.
[0007]
Then, the subject of this invention is providing the fine magnetic substance removal apparatus which can remove the mixed fine magnetic substance reliably and efficiently, even if it is a granular material conveyed with a high conveyance speed.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a magnetic material for detecting a minute magnetic material mixed in the conveyed granular material along a conveying line for conveying the granular material on a conveying surface having a predetermined width. In the fine magnetic substance removing device in which a detection means and a magnetic substance removal means for removing the fine magnetic substance detected by the magnetic substance detection means are arranged in order from the upstream side, the magnetic substance detection means is arranged in the width direction of the transport surface. The magnetic substance removing means is formed by a plurality of independent operating ends arranged corresponding to the arrangement in the width direction of the magnetic sensor, and the minute magnetic substance detected by each of the magnetic sensors is formed. Then, a configuration is adopted in which tracking is made to the position of the working end corresponding to the detected magnetic sensor, the working end is operated, and minute magnetic substances mixed in the powder particles are removed at a pinpoint.
[0009]
That is, the magnetic substance detecting means is formed as a plurality of magnetic sensors arranged in the width direction of the transport surface, and the magnetic substance removing means is formed by a plurality of independent operating ends corresponding to the arrangement of the magnetic sensors, and is detected by each magnetic sensor. By tracking the minute magnetic material that has been made to the position of the working end of the corresponding magnetic material removing means and operating this working end, the fine magnetic material that mixes in the granular material without reducing the transport speed of the transport device Magnetic material can be removed efficiently and reliably at a pinpoint.
[0010]
As the operating end of the magnetic substance removing means, a plurality of suction nozzles arranged in the width direction so as to be close to the transport surface and sucking and removing the minute magnetic substance can be adopted.
[0011]
By making the negative pressure generation source of the suction nozzle an air ejector that generates a secondary suction flow with a primary air flow, the suction responsiveness of the suction nozzle can be improved.
[0012]
As the operating end of the magnetic substance removing means, a plurality of air injection nozzles arranged in the width direction so as to be close to the discharge end of the conveyance surface and blowing and removing the minute magnetic substance can also be adopted.
[0013]
By providing a layer thickness adjusting means for equalizing the granular material conveyed on the conveying surface to a thin layer thickness on the upstream side of the magnetic substance detecting means, the detection accuracy of the minute magnetic substance can be stably improved. In addition, each magnetic sensor as the magnetic substance detecting means can be made small and compact.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6 show a first embodiment. FIG. 1 and FIG. 2 show a conveying line for a granular material that is a positive electrode material for a lithium ion battery in which the fine magnetic substance removing device of the embodiment is arranged. This conveying line includes a hopper 1 into which powder particles are charged, a vibration feeder 2 that feeds powder particles from the lower end of the hopper 1, and a belt that receives the powder particles fed by the vibration feeder 2 and conveys them to the discharge end. The conveyor 3 is composed of a chute 4 and a product recovery unit 5 into which the granular material conveyed to the discharge end is put. On both sides of the belt conveyor 3, side guides 3a for regulating the conveying width of the granular material are provided. Note that the belt conveyor 3 is set to a conveyance speed higher than that of the vibration feeder 2, and is configured to reduce the thickness of the granular material received from the vibration feeder 2.
[0015]
The fine magnetic substance removing device mixes the powder and granular material along the conveying line of the belt conveyor 3 with the gate 6 as a layer thickness adjusting means for equalizing the granular material received from the vibration feeder 2 to a thin layer thickness. A plurality of magnetic sensors 7 as magnetic substance detecting means for detecting minute magnetic substances and a plurality of suction nozzles 8 as operating ends of the magnetic substance removing means are sequentially arranged from the upstream side. A controller 9 is also provided for operating each suction nozzle 8 based on the detected output. In addition, a magnetic sensor 10 is provided in front of the discharge end of the belt conveyor 3 for confirming that no fine magnetic material remains in the powder particles put into the chute 4.
[0016]
Each of the magnetic sensors 7 is a thin film having a size of about 2 mm square formed by forming a thin film of a metal magnetic material on a substrate of a sensor head into a meander shape with a spiral fold. The magnetic sensor 7 uses a magnetic impedance effect to detect magnetism. As shown in FIGS. 3 (a) and 3 (b), it is a contact type, and is attached to the lower surface close to the conveying surface of the frame 11 across the belt conveyor 3 via a support base 7a having a magnet. . These magnetic sensors 7 are n staggered in two rows so that there are no gaps in the detection section in the width direction so that minute magnetic materials can be detected throughout the entire conveyance width of the belt conveyor 3. Is arranged. This arrangement is sufficient if there is no gap in the detection section in the width direction, and may be an arrangement of three or more rows or an arrangement other than a staggered pattern. Although not shown, the confirmation magnetic sensor 10 has the same configuration.
[0017]
As shown in FIGS. 4 and 5, each of the suction nozzles 8 is connected to a foreign matter collecting unit 13 of a minute magnetic substance via an ejector 12, and an air pipe 14 having an electromagnetic valve 8 a is connected to the ejector 12. ing. The suction nozzles 8 whose suction ports are close to the transport surface of the belt conveyor 3 are shifted in the transport direction by a little by two in the width direction corresponding to the sensor heads of the magnetic sensors 7 in the width direction. Arranged in columns.
[0018]
As shown in FIG. 1, the controller 9 is connected to the magnetic sensors 7 and 10, an encoder (not shown) for detecting the conveying speed V of the belt conveyor 3, and an electromagnetic valve 8 a of each suction nozzle 8. The conveyance distance L i (i = 1 to n) between each magnetic sensor 7 and the suction nozzle 8 corresponding to 1: 1 is input in advance. The encoder detects the rotational speed of the driving roller 3b of the belt conveyor 3, and the transport speed V of the belt conveyor 3 is obtained from this rotational speed.
[0019]
The controller 9, when the micro-magnetic material mixed in the granular material in one of the magnetic sensor 7 is detected, and a conveying speed V of the belt conveyor 3 and the conveying distance L i which the relevant, FIG. 6 (a ), The time required for the detected minute magnetic substance M to reach directly below the corresponding suction nozzle 8 is tracked, and the solenoid valve 8a is operated to be opened momentarily at the tracked timing. When the electromagnetic valve 8a is opened, compressed air from the air pipe 14 flows into the ejector 12 as a primary flow toward the foreign matter collecting unit 13, and a secondary suction flow is generated at the suction port of the suction nozzle 8 by the primary flow. Then, as shown in FIG. 6 (b), the granular material A including the minute magnetic material M immediately below is sucked into the suction nozzle 8 at a pinpoint. The granular material A including the attracted minute magnetic material M is removed by being collected by the foreign matter collecting unit 13. As described above, since the suction nozzle 8 is provided independently for each magnetic sensor 7, even if a plurality of magnetic sensors 7 detect minute magnetic materials at the same time, these can be surely removed. .
[0020]
The granular material from which the fine magnetic material has been removed in this way is conveyed to the discharge end of the belt conveyor 3, and after confirming that the fine magnetic material is not mixed by the magnetic sensor 10 for confirmation, the chute 4 To the product collection unit 5. If the remaining magnetic material is detected by the magnetic sensor 10, the controller 9 stops the belt conveyor 3 and issues an alarm signal.
[0021]
7 and 8 show a second embodiment. This fine magnetic substance removing device also removes the fine magnetic substance from the granular material conveyed by the belt conveyor 3, and the working end of the magnetic substance removing means is brought close to the discharge end of the belt conveyor 3 in the width direction. The difference from the first embodiment is that the air injection nozzles 15 are arranged. Similar to the first embodiment, the magnetic sensor 7 as the magnetic substance detecting means is arranged in two rows in a staggered manner in the width direction, and is connected to a controller 9 that operates each air injection nozzle 15. Although not shown, each air injection nozzle 15 is connected to an air source such as a compressor via a solenoid valve. The configuration of the gate or the like as the upstream layer thickness adjusting means is the same as that of the first embodiment.
[0022]
The air injection nozzles 15 are arranged in a staggered manner in two rows on the lower side of the belt of the belt conveyor 3 that escapes obliquely downward at the discharge end, and obliquely upward toward the powder particles falling from the discharge end. These air injection nozzles 15 are also arranged at positions in the width direction corresponding to the magnetic sensors 7 and 1: 1, similarly to the suction nozzle 8 of the first embodiment. When the minute magnetic substance is detected to be mixed into powder particles in one of the magnetic sensors 7, the controller 9, the conveyance distance L i up to the discharge end from the magnetic sensor 7 and the appropriate transport speed V of the belt conveyor 3 Based on this, the time when the detected minute magnetic material falls from the discharge end is tracked, and the corresponding air injection nozzle 15 is operated to open momentarily to pin the surrounding powder particles containing the minute magnetic material. Blow away with points. Therefore, the blown-off micromagnetic material falls from the chute 4b away from the discharge end to the foreign matter collection unit 16, and the powder particles from which the micromagnetic material has been removed from the chute 4a immediately below the discharge end to the product recovery unit 5 To be recovered.
[0023]
In each of the embodiments described above, the suction nozzles and air injection nozzles that are the working ends of the magnetic substance removing means are arranged in a 1: 1 correspondence with the magnetic sensor. However, each working end is divided into two or more magnetic ends. It may be arranged corresponding to the sensor to reduce the number of operating ends of the magnetic substance removing means.
[0024]
In addition, the operating ends of the magnetic sensor and the magnetic substance removing means are not limited to those of the embodiment, but can be limited to a narrow range in the conveyance width direction and can detect and remove minute magnetic substances. I just need it. In addition to the belt conveyor, the fine magnetic substance removing device according to the present invention can also be disposed on a conveying line such as a vibration feeder or a rotary table that conveys the granular material on a conveying surface having a predetermined width.
[0025]
【The invention's effect】
As described above, the minute magnetic substance removing device according to the present invention includes a plurality of magnetic sensors in which the magnetic substance detecting means are arranged in the width direction of the transport surface, and the magnetic substance removing means is associated with the arrangement of the magnetic sensors. Since the minute magnetic material formed by the independent operation ends and detected by each magnetic sensor is tracked to the position of the operation end of the corresponding magnetic material removal means, the operation end is operated. Without reducing the conveying speed, the fine magnetic material mixed in the powder can be reliably and efficiently removed at a pinpoint, and the product recovery rate can be increased.
[0026]
In addition, by providing a layer thickness adjusting means for equalizing the granular material conveyed on the conveying surface to a thin layer thickness on the upstream side of the magnetic substance detecting means, the detection accuracy of minute magnetic substances can be stably improved. Each magnetic sensor as the magnetic substance detecting means can also be made small and compact.
[Brief description of the drawings]
FIG. 1 is a front view showing a minute magnetic substance removing device according to a first embodiment arranged in a powder particle conveying line. FIG. 2 is a plan view of FIG. 1. FIG. 3a is III-III in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1. FIG. 5 is a plan view for explaining the arrangement relationship between the magnetic sensor and the suction nozzle in FIG. 6A is an enlarged cross-sectional view showing a state immediately before the suction nozzle corresponding to the magnetic sensor that has detected a minute magnetic substance is activated, and b is an enlarged cross-sectional view showing a state immediately after the operation of a. FIG. FIG. 8 is a partially omitted front view showing the minute magnetic substance removing device of the embodiment. FIG. 8 is a partially omitted side view of FIG.
DESCRIPTION OF SYMBOLS 1 Hopper 2 Vibrating feeder 3 Belt conveyor 3a Side guide 3b Drive roller 4, 4a, 4b Chute 5 Product collection part 6 Gate 7 Magnetic sensor 7a Support stand 8 Suction nozzle 8a Electromagnetic valve 9 Controller 10 Magnetic sensor 11 Frame 12 Ejector 13 Foreign material collection Part 14 Air tube 15 Air injection nozzle 16 Foreign matter recovery part

Claims (5)

粉粒体を所定幅の搬送面上で搬送する搬送ラインに沿って、前記搬送される粉粒体に混入する微小磁性物を検出する磁性物検出手段と、磁性物検出手段で検出された微小磁性物を除去する磁性物除去手段とを上流側から順に配設した微小磁性物除去装置において、前記磁性物検出手段を前記搬送面の幅方向に配列した複数の磁気センサとし、前記磁性物除去手段をこの磁気センサの幅方向配列に対応させて配列した複数の独立な作動端で形成し、前記各磁気センサで検出された微小磁性物を、検出した磁気センサに対応する前記作動端の位置までトラッキングしてこの作動端を作動させ、前記粉粒体に混入する微小磁性物をピンポイントで除去するようにしたことを特徴とする微小磁性物除去装置。A magnetic substance detecting means for detecting a minute magnetic substance mixed in the conveyed granular material along a conveying line for conveying the granular material on a conveying surface having a predetermined width, and a minute substance detected by the magnetic substance detecting means. In the minute magnetic substance removing device in which magnetic substance removing means for removing the magnetic substance are arranged in order from the upstream side, the magnetic substance detecting means is a plurality of magnetic sensors arranged in the width direction of the transport surface, and the magnetic substance removing means The means is formed by a plurality of independent operating ends arranged corresponding to the arrangement in the width direction of the magnetic sensor, and the position of the operating end corresponding to the detected magnetic sensor is detected by the minute magnetic material detected by each magnetic sensor. The fine magnetic substance removing apparatus is characterized in that the fine magnetic substance mixed in the powder and granular material is removed at a pinpoint by tracking this until the operating end is activated. 前記磁性物除去手段の作動端を、前記搬送面に近接させてその幅方向に配列され、前記微小磁性物を吸引して除去する複数の吸引ノズルとした請求項1に記載の微小磁性物除去装置。2. The magnetic material removing device according to claim 1, wherein the magnetic material removing unit has a plurality of suction nozzles that are arranged in the width direction so as to be close to the transport surface and suck and remove the fine magnetic material. apparatus. 前記吸引ノズルの負圧発生源を、空気の一次流で吸引二次流を発生させる空気エジェクタとした請求項2に記載の微小磁性物除去装置。The fine magnetic substance removing device according to claim 2, wherein the negative pressure generation source of the suction nozzle is an air ejector that generates a suction secondary flow using a primary air flow. 前記磁性物除去手段の作動端を、前記搬送面の排出端に近接させてその幅方向に配列され、前記微小磁性物をブローして除去する複数のエア噴射ノズルとした請求項1に記載の微小磁性物除去装置。The operating end of the magnetic substance removing means is arranged in the width direction so as to be close to the discharge end of the transport surface, and is a plurality of air injection nozzles that blow and remove the minute magnetic substance. Micro magnetic material removal device. 前記磁性物検出手段の上流側に、前記搬送面上を搬送される粉粒体を薄い層厚に均す層厚調整手段を設けた請求項1乃至4のいずれかに記載の微小磁性物除去装置。5. The minute magnetic substance removal unit according to claim 1, further comprising a layer thickness adjusting unit that equalizes the granular material conveyed on the conveying surface to a thin layer thickness on an upstream side of the magnetic substance detecting unit. apparatus.
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JP2005183142A (en) * 2003-12-18 2005-07-07 Mitsubishi Chemicals Corp Method for detecting foreign matter in electrode material for lithium secondary battery
JP2009532198A (en) * 2006-03-31 2009-09-10 トーマス バレリオ、 Method and apparatus for classifying fine non-ferrous metals and insulated wire fragments
US20120245743A1 (en) * 2009-12-10 2012-09-27 Takehiko Hino machine, a system, and a method for suctioning powders and granular materials
CN103260776A (en) * 2011-12-15 2013-08-21 松下电器产业株式会社 Sorting device and sorting method
CN103501924A (en) * 2011-04-28 2014-01-08 夸利森斯股份公司 Sorting apparatus
CN105358266A (en) * 2013-04-25 2016-02-24 松下知识产权经营株式会社 Sorting device for material and sorting method
CN105772414A (en) * 2016-05-08 2016-07-20 无锡奥特维智能装备有限公司 Battery detection machine
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CN106824831A (en) * 2016-12-19 2017-06-13 金同林 A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity
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JP4701608B2 (en) * 2003-12-18 2011-06-15 三菱化学株式会社 Method for detecting foreign matter in electrode material for lithium secondary battery
JP2005183142A (en) * 2003-12-18 2005-07-07 Mitsubishi Chemicals Corp Method for detecting foreign matter in electrode material for lithium secondary battery
JP2009532198A (en) * 2006-03-31 2009-09-10 トーマス バレリオ、 Method and apparatus for classifying fine non-ferrous metals and insulated wire fragments
US9126773B2 (en) * 2009-12-10 2015-09-08 Sintokogio, Ltd. Machine, a system, and a method for suctioning powders and granular materials
US20120245743A1 (en) * 2009-12-10 2012-09-27 Takehiko Hino machine, a system, and a method for suctioning powders and granular materials
CN103501924A (en) * 2011-04-28 2014-01-08 夸利森斯股份公司 Sorting apparatus
US8907241B2 (en) 2011-04-28 2014-12-09 Qualysense Ag Sorting apparatus
CN103260776A (en) * 2011-12-15 2013-08-21 松下电器产业株式会社 Sorting device and sorting method
CN103260776B (en) * 2011-12-15 2015-07-01 松下电器产业株式会社 Sorting device and sorting method
US9199283B2 (en) 2011-12-15 2015-12-01 Panasonic Intellectual Property Management Co., Ltd. Separation apparatus and separation method
CN105358266A (en) * 2013-04-25 2016-02-24 松下知识产权经营株式会社 Sorting device for material and sorting method
CN105800314A (en) * 2016-04-12 2016-07-27 攸潇潇 Cylindrical lithium battery automatic screening mechanical power arm and screening method thereof
CN105772414A (en) * 2016-05-08 2016-07-20 无锡奥特维智能装备有限公司 Battery detection machine
CN106824831A (en) * 2016-12-19 2017-06-13 金同林 A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity
JP7511039B2 (en) 2018-07-09 2024-07-04 ノベリス・インコーポレイテッド System and method for sorting materials on a conveyor
CN112474431A (en) * 2020-11-29 2021-03-12 龚海燕 Conveying equipment with color sorting and rejecting mechanism and implementation method thereof

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