JP2004041903A - Planetary mixer - Google Patents

Planetary mixer Download PDF

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Publication number
JP2004041903A
JP2004041903A JP2002202039A JP2002202039A JP2004041903A JP 2004041903 A JP2004041903 A JP 2004041903A JP 2002202039 A JP2002202039 A JP 2002202039A JP 2002202039 A JP2002202039 A JP 2002202039A JP 2004041903 A JP2004041903 A JP 2004041903A
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JP
Japan
Prior art keywords
cylinder
blade
rotor
shaft
support cylinder
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2002202039A
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Japanese (ja)
Inventor
Masanori Inoue
井上 政憲
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.)
Inoue Mfg Inc
Original Assignee
Inoue Mfg Inc
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
Application filed by Inoue Mfg Inc filed Critical Inoue Mfg Inc
Priority to JP2002202039A priority Critical patent/JP2004041903A/en
Publication of JP2004041903A publication Critical patent/JP2004041903A/en
Pending legal-status Critical Current

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  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a planetary mixer constituted so as to form a metal powder from a shaft seal part when treatment is performed by applying pressure to the inside of a tank or reducing the pressure in the tank. <P>SOLUTION: A rotor (5) is attached to the main shaft (3) extending so as to pierce through a support cylinder (4). The rotor (5) has a gear case part (6) and a bearing case part (7). A blade shaft (8) is supported by a bearing case part (7) and a blade (28) is provided to the lower part of the blade shaft (8). An upper cylinder (12) is provided above the gear case part (6) so as to surround the support cylinder (4). A lower cylinder (13) is provided to the lower part of the bearing case part (7) so as to surround the blade shaft (8). Magnetic seal units (15) and (18) are provided between the upper cylinder (12) and the support cylinder (4) and between the lower cylinder (13) and the blade shaft (8), respectively. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、タンク内でブレードを遊星運動させて処理材料を混練等するようにしたプラネタリーミキサーに関する。
【0002】
【従来の技術】
プラネタリーミキサーは、2軸、3軸等のブレード軸を有し、該ブレード軸に設けたブレードをタンク内で遊星運動させ、強力な混合、攪拌、混練作用を行うことができ、特に固体(粉粒体)と液体との混合物よりなる粘性体(ペースト)材料の攪拌、混練等にすぐれており、またタンク内を加圧したり、加熱、真空減圧等することにより水性系および溶剤系の材料のフラッシングやパウダー化が可能であり、種々の製品の生産に用いられている。
【0003】
上記のように、タンク内を加圧したり、真空減圧して処理するには、タンクの上面をフードで覆って行うが、上記ブレードを駆動する主軸やブレード軸は、大気側に連通しているので、主軸等の周辺からの通気を防止するよう上記プラネタリーミキサーには軸封装置が設けられている。通常、プラネタリーミキサーの軸封装置としては、主軸により回転されるローターの軸封部にゴム系またはテフロン(登録商標)系のオイルシールタイプのリップシールを1〜2段取り付け、該リップシールを各軸に装着した軸スリーブに摺接させている。該軸スリーブは、ステンレス鋼で構成され、窒化処理等による表面硬化処理を施されているが、リップシールと軸スリーブが接触して回転する構造のため、リップシールの摩耗粉や軸スリーブから摩耗した金属粉がローターの回転に伴ってタンク内に落下してしまうことがある。しかし、処理材料の中には、金属の混入が絶対的に認められない場合があり、そのような材料のときには、従来のプラネタリーミキサーを使用することができなかった。
【0004】
【発明が解決しようとする課題】
本発明の解決課題は、タンク内を加圧または真空減圧状態に保持して処理を行うプラネタリーミキサーにおいて、主軸により回転されるローターから処理中に金属粉等がタンク内に落下して処理材料中に混入するおそれがないようにしたプラネタリーミキサーを提供することである。
【0005】
【課題を解決するための手段】
本発明によれば、タンク上に位置する攪拌ヘッドに支持筒を設け、該支持筒に主軸を挿通し、該主軸の下部にローターを取り付け、該ローターのベアリングケース部に複数のブレード軸を軸支し、該ローターのギアケース部に延びる上記ブレード軸の先端に遊星歯車を設け、該遊星歯車を上記支持筒に設けた太陽歯車に係合し、上記ブレード軸の下端にタンク内で回転するようブレードを設け、上記ローターのギアケース部の上方に上記支持筒を囲む上部筒を形成し、該上部筒と支持筒間に磁気シールユニットを設け、上記ローターのベアリングケース部の下方に上記ブレード軸を囲む下部筒を形成し、該下部筒とブレード軸間に磁気シールユニットを設けたことを特徴とするプラネタリーミキサーが提案され、上記課題が解決される。
【0006】
上記磁気シールユニットは、磁石、ヨーク及び磁性流体を含む磁気シールを具備し、該磁気シールにより回転部とヨーク間に磁性流体をかけ渡して磁性流体膜を形成し、この磁性流体膜によりシールすることができるので、ローターが回転しても従来のように摩耗により金属粉等が発生するおそれがない。
【0007】
【発明の実施の形態】
図1は本発明の一実施例を示し、2軸のブレード軸を有するプラネタリーミキサーを示してあるが、3軸若しくはそれ以上のブレード軸を有するプラネタリーミキサーに本発明を適用することもできる。該プラネタリーミキサーは、公知のように、タンク(1)に対して昇降可能に設けた攪拌ヘッド(2)を有し、該攪拌ヘッドにはモーター等の駆動手段(図示略)により駆動される主軸(3)がある。該主軸(3)は上記攪拌ヘッド(2)に固定した支持筒(4)にベアリング(図示略)を介して回転自在に軸支され、該支持筒(4)を通って下方に延びる下部にローター(5)が取り付けられている。
【0008】
上記ローター(5)は、ギアケース部(6)とその下方に気密的に連結されるベアリングケース部(7)を有し、該ベアリングケース部(7)には、複数の、図に示す実施例では2つのブレード軸(8),(8)がベアリング(9),(9)により回転自在に軸支されている。該ブレード軸(8)の先端には、上記ギアケース部(6)に延び、遊星歯車(10)が設けられており、該遊星歯車(10)は上記支持筒(4)に設けた太陽歯車(11)に係合している。図1においては、該太陽歯車は、遊星歯車の内側に位置しているが、遊星歯車の外側に位置するように内歯太陽歯車を用いてもよい。
【0009】
上記ギアケース部(6)の上方には上記支持筒(4)を囲むよう上部筒(12)が取り付けられ、上記ベアリングケース部(7)の下方には上記ブレード軸(8)を囲むよう下部筒(13)が取り付けられている。図2は、主として上部筒(12)部分を示し、上記支持筒(4)の外周には、スリーブ(14)が気密的に装着され、該スリーブ(14)と上部筒(12)の間には磁気シールユニット(15)が設けられ、該磁気シールユニット(15)の下方にはベアリング(16),(16) が設けられている。
【0010】
図3は、主として下部筒(13)部分を示し、上記ブレード軸(8)の外周にはスリーブ(17)が気密的に装着され、該スリーブ(17)と下部筒(13)間には磁気シールユニット(18)が設けられ、該磁気シールユニット(18)の上方にはベアリング(19),(19) が設けられている。なお、上記上部筒(12)及び下部筒(13)は、上記各ケース部(6),(7)と別体に形成し、ねじ(図示略)等で気密的に取り付けてあるが、各ケース部(6),(7)とそれぞれ一体的に形成することもできる。
【0011】
上記磁気シールユニット(15),(18) は、公知の種々の磁性流体軸封装置を用いることができ、図4にはその一例が示されている。図4に示すように、磁気シールユニット(15),(18) は、外筒部材(20)内に内筒部材(21)を軸受(22),(22) を介して回転自在に設け、該軸受(22),(22) 間の内筒部材の外周に磁石、ヨーク、磁性流体を含む磁気シール(23)を設けてあり、上記外筒部材(20)にOリング等の弾性部材(24)を嵌着して上記上部筒(12)若しくは下部筒(13)内に密嵌すると共に上記内筒部材(21)にOリング等の弾性部材(25)を嵌着して上記スリーブ(14),(17) の外面に密嵌してある。
【0012】
上記磁気シールユニットは、上記上部筒(12)及び下部筒(13)の他、図に示す実施例ではローター内の主軸(3)と支持筒(4)間やブレード軸(8)とベアリングケース部(7)間にも磁気シールユニット(26),(27) を設けることができるが、これらの部分はローターの内部に設けられているので、従来のリップシールでもよい。
【0013】
上記主軸(3)が駆動手段により回転すると、上記ローター(5)が回転し、上記ブレード軸(8),(8)に取り付けた枠型ブレード等のブレード(28),(28) が遊星運動して回転する。そして、タンクの上面をフード(29)で覆ってタンク(1)内を加圧したり、真空減圧しても上記ローター(5)の上部筒(12)及び下部筒(13)部分の磁気シールユニット(15),(18) によりローター(5)内は気密に保持されるから、上記真空減圧状態を保持することができ、摩耗により金属粉を生じることもなく、処理材料に金属が混入するおそれもない。なお、図4に示すように磁気シールユニットに弾性部材(24),(25) を設けると、ブレードを強力に回転させることによりブレード軸等に微小のたわみを生じても確実にシールすることができる。
【0014】
【発明の効果】
本発明は上記のように構成され、タンク上に位置する攪拌ヘッドに支持筒を設け、該支持筒に主軸を挿通し、該主軸の下部にローターを取り付け、該ローターのベアリングケース部に複数のブレード軸を軸支し、該ローターのギアケース部に延びる上記ブレード軸の先端に遊星歯車を設け、該遊星歯車を上記支持筒に設けた太陽歯車に係合し、上記ブレード軸の下端にタンク内で回転するようブレードを設け、上記ローターのギアケース部の上方に上記支持筒を囲む上部筒を形成し、該上部筒と支持筒間に磁気シールユニットを設け、上記ローターのベアリングケース部の下方に上記ブレード軸を囲む下部筒を形成し、該下部筒とブレード軸間に磁気シールユニットを設けたから、真空減圧状態等で上記ローターを回転して上記ブレードをタンク内で遊星運動させても、真空状態等を保持することができ、この際従来のように上記支持筒やブレード軸の周囲から摩耗により金属粉が生じることもなく、タンク内の処理材料に金属を混入させないようにすることができる。
【図面の簡単な説明】
【図1】本発明の一実施例を示す説明図。
【図2】主として上部筒部分の拡大断面図。
【図3】主として下部筒部分の拡大断面図。
【図4】磁気シールユニットの一実施例を示す断面図。
【符号の説明】
3…主軸
4…支持筒
5…ローター
6…ギアケース部
7…ベアリングケース部
8…ブレード軸
12…上部筒
13…下部筒
15, 18, 26, 27…磁気シールユニット
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a planetary mixer in which a processing material is kneaded by planetary movement of a blade in a tank.
[0002]
[Prior art]
The planetary mixer has a blade axis such as two axes, three axes, etc., and can perform powerful mixing, stirring, and kneading actions by causing a blade provided on the blade axis to perform planetary motion in a tank, and particularly to a solid ( Viscous material (paste) composed of a mixture of powder and granules) and liquid is excellent in stirring, kneading, and the like. Aqueous and solvent-based materials can be obtained by pressurizing, heating, or depressurizing the tank. It can be flushed or powdered, and is used in the production of various products.
[0003]
As described above, the processing in which the tank is pressurized or vacuum depressurized is performed by covering the upper surface of the tank with a hood, but the main shaft or blade shaft that drives the blade communicates with the atmosphere. Therefore, the above-mentioned planetary mixer is provided with a shaft sealing device so as to prevent ventilation from the periphery such as the main shaft. Usually, as a shaft sealing device of a planetary mixer, a rubber or Teflon (registered trademark) oil seal type lip seal is attached to a shaft sealing portion of a rotor rotated by a main shaft in one or two stages, and the lip seal is attached. Sliding contact is made with the shaft sleeve mounted on each shaft. The shaft sleeve is made of stainless steel and has been subjected to a surface hardening treatment such as nitriding treatment. The metal powder may fall into the tank as the rotor rotates. However, in some processing materials, contamination of metals may not be absolutely recognized. In such a case, a conventional planetary mixer cannot be used.
[0004]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a planetary mixer that performs processing while maintaining the inside of a tank under a pressurized or vacuum state, in which metal powder or the like falls into the tank during processing from a rotor rotated by a main shaft, and the processing material is reduced. It is an object of the present invention to provide a planetary mixer which is prevented from being mixed therein.
[0005]
[Means for Solving the Problems]
According to the present invention, a support cylinder is provided on a stirring head located on a tank, a main shaft is inserted through the support cylinder, a rotor is attached to a lower portion of the main shaft, and a plurality of blade shafts are mounted on a bearing case portion of the rotor. A planetary gear is provided at the tip of the blade shaft extending to the gear case portion of the rotor, the planetary gear is engaged with a sun gear provided on the support cylinder, and the lower end of the blade shaft rotates in a tank. A blade is provided, an upper cylinder surrounding the support cylinder is formed above the gear case part of the rotor, a magnetic seal unit is provided between the upper cylinder and the support cylinder, and the blade is provided below a bearing case part of the rotor. A planetary mixer has been proposed in which a lower cylinder surrounding a shaft is formed and a magnetic seal unit is provided between the lower cylinder and a blade shaft, and the above-mentioned problem is solved.
[0006]
The magnetic seal unit includes a magnetic seal including a magnet, a yoke, and a magnetic fluid. The magnetic seal wraps a magnetic fluid between the rotating unit and the yoke to form a magnetic fluid film, and seals with the magnetic fluid film. Therefore, even if the rotor rotates, there is no possibility that metal powder or the like is generated due to abrasion as in the related art.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of the present invention, showing a planetary mixer having two blade axes. However, the present invention can be applied to a planetary mixer having three or more blade axes. . As is well known, the planetary mixer has a stirring head (2) provided to be movable up and down with respect to the tank (1), and the stirring head is driven by driving means (not shown) such as a motor. There is a main shaft (3). The main shaft (3) is rotatably supported by a support cylinder (4) fixed to the stirring head (2) via a bearing (not shown), and extends downward through the support cylinder (4). A rotor (5) is attached.
[0008]
The rotor (5) has a gear case part (6) and a bearing case part (7) airtightly connected below the gear case part (6). The bearing case part (7) has a plurality of the illustrated embodiments. In the example, two blade shafts (8) and (8) are rotatably supported by bearings (9) and (9). At the tip of the blade shaft (8), a planetary gear (10) is provided extending to the gear case portion (6), and the planetary gear (10) is a sun gear provided on the support cylinder (4). (11) is engaged. In FIG. 1, the sun gear is located inside the planetary gear, but an internal gear sun gear may be used so as to be located outside the planetary gear.
[0009]
An upper cylinder (12) is attached above the gear case (6) so as to surround the support cylinder (4), and a lower part is arranged below the bearing case (7) so as to surround the blade shaft (8). A tube (13) is attached. FIG. 2 mainly shows an upper cylinder (12) portion, and a sleeve (14) is hermetically mounted on an outer periphery of the support cylinder (4), and is provided between the sleeve (14) and the upper cylinder (12). Is provided with a magnetic seal unit (15), and bearings (16), (16) are provided below the magnetic seal unit (15).
[0010]
FIG. 3 mainly shows a lower cylinder (13) portion. A sleeve (17) is hermetically mounted on the outer periphery of the blade shaft (8), and a magnetic field is provided between the sleeve (17) and the lower cylinder (13). A seal unit (18) is provided, and bearings (19) and (19) are provided above the magnetic seal unit (18). The upper cylinder (12) and the lower cylinder (13) are formed separately from the case parts (6) and (7), and are hermetically attached with screws (not shown). It can also be formed integrally with the case portions (6) and (7).
[0011]
Various known magnetic fluid shaft sealing devices can be used for the magnetic seal units (15) and (18), and FIG. 4 shows an example. As shown in FIG. 4, the magnetic seal units (15) and (18) have an inner cylinder member (21) rotatably provided in bearings (22) and (22) in an outer cylinder member (20). A magnet, a yoke, and a magnetic seal (23) containing a magnetic fluid are provided on the outer periphery of the inner cylinder member between the bearings (22) and (22). An elastic member such as an O-ring is provided on the outer cylinder member (20). 24) and fit tightly into the upper cylinder (12) or lower cylinder (13), and an elastic member (25) such as an O-ring is fitted to the inner cylinder member (21). 14) and (17).
[0012]
In the embodiment shown in the drawing, the magnetic seal unit is provided between the main shaft (3) and the support tube (4) in the rotor, the blade shaft (8) and the bearing case in addition to the upper tube (12) and the lower tube (13). Magnetic seal units (26) and (27) can be provided between the parts (7), but since these parts are provided inside the rotor, a conventional lip seal may be used.
[0013]
When the main shaft (3) is rotated by the driving means, the rotor (5) is rotated, and the blades (28), (28) such as frame type blades attached to the blade shafts (8), (8) are in planetary motion. And rotate. Then, even if the upper surface of the tank is covered with a hood (29) and the inside of the tank (1) is pressurized or reduced in vacuum, the magnetic seal unit of the upper cylinder (12) and the lower cylinder (13) of the rotor (5) is provided. Since the inside of the rotor (5) is kept airtight by (15) and (18), the vacuum depressurized state can be maintained, metal powder is not generated by abrasion, and metal may be mixed into the processing material. Nor. When the magnetic seal unit is provided with the elastic members (24) and (25) as shown in FIG. 4, the blade can be strongly rotated to securely seal even if a slight deflection occurs in the blade shaft or the like. it can.
[0014]
【The invention's effect】
The present invention is configured as described above, a support cylinder is provided in the stirring head located on the tank, a main shaft is inserted into the support cylinder, a rotor is attached to a lower portion of the main shaft, and a plurality of bearings are provided in a bearing case portion of the rotor. A planetary gear is provided at the tip of the blade shaft that supports the blade shaft and extends to the gear case portion of the rotor, the planetary gear is engaged with a sun gear provided on the support cylinder, and a tank is provided at a lower end of the blade shaft. A blade is provided to rotate within the rotor, an upper cylinder surrounding the support cylinder is formed above the gear case section of the rotor, a magnetic seal unit is provided between the upper cylinder and the support cylinder, and a bearing case section of the rotor is provided. A lower cylinder surrounding the blade shaft is formed below and a magnetic seal unit is provided between the lower cylinder and the blade shaft. Even when planetary motion is performed in the tank, a vacuum state or the like can be maintained, and at this time, metal powder is not generated due to abrasion from around the support cylinder and the blade shaft as in the conventional case, and the processing material in the tank Metals can be prevented from being mixed.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing one embodiment of the present invention.
FIG. 2 is an enlarged sectional view mainly showing an upper cylindrical portion.
FIG. 3 is an enlarged sectional view mainly showing a lower cylindrical portion.
FIG. 4 is a sectional view showing one embodiment of a magnetic seal unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Main shaft 4 ... Support cylinder 5 ... Rotor 6 ... Gear case part 7 ... Bearing case part 8 ... Blade shaft 12 ... Upper cylinder 13 ... Lower cylinder 15, 18, 26, 27 ... Magnetic seal unit

Claims (3)

タンク上に位置する攪拌ヘッドに支持筒を設け、該支持筒に主軸を挿通し、該主軸の下部にローターを取り付け、該ローターのベアリングケース部に複数のブレード軸を軸支し、該ローターのギアケース部に延びる上記ブレード軸の先端に遊星歯車を設け、該遊星歯車を上記支持筒に設けた太陽歯車に係合し、上記ブレード軸の下端にタンク内で回転するようブレードを設け、上記ローターのギアケース部の上方に上記支持筒を囲む上部筒を形成し、該上部筒と支持筒間に磁気シールユニットを設け、上記ローターのベアリングケース部の下方に上記ブレード軸を囲む下部筒を形成し、該下部筒とブレード軸間に磁気シールユニットを設けたことを特徴とするプラネタリーミキサー。A support cylinder is provided on the stirring head located on the tank, a main shaft is inserted through the support cylinder, a rotor is attached to a lower portion of the main shaft, a plurality of blade shafts are pivotally supported on a bearing case portion of the rotor, and A planetary gear is provided at the tip of the blade shaft extending to the gear case portion, the planetary gear is engaged with a sun gear provided on the support cylinder, and a blade is provided at the lower end of the blade shaft so as to rotate in a tank, An upper cylinder surrounding the support cylinder is formed above the gear case part of the rotor, a magnetic seal unit is provided between the upper cylinder and the support cylinder, and a lower cylinder surrounding the blade shaft below the bearing case part of the rotor. A planetary mixer, wherein a magnetic seal unit is provided between the lower cylinder and the blade shaft. 上記上部筒に設けた磁気シールユニットの下方には、上記支持筒を軸支するベアリングが設けられている請求項1に記載のプラネタリーミキサー。2. The planetary mixer according to claim 1, wherein a bearing that supports the support cylinder is provided below the magnetic seal unit provided on the upper cylinder. 3. 上記下部筒に設けた磁気シールユニットの上方には、上記ブレード軸を軸支するベアリングが設けられている請求項1または2に記載のプラネタリーミキサー。The planetary mixer according to claim 1, wherein a bearing that supports the blade shaft is provided above the magnetic seal unit provided in the lower cylinder.
JP2002202039A 2002-07-11 2002-07-11 Planetary mixer Pending JP2004041903A (en)

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JP2007100008A (en) * 2005-10-07 2007-04-19 Toyo Ink Mfg Co Ltd METHOD FOR PREPARING epsilon-PHTHALOCYANINE PIGMENT
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JP2018111067A (en) * 2017-01-12 2018-07-19 株式会社井上製作所 High shear type disperser
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JPWO2006098261A1 (en) * 2005-03-14 2008-08-21 サカタインクス株式会社 Treated pigment and its use
JP2006272139A (en) * 2005-03-29 2006-10-12 Toray Ind Inc Paste stirrer and production method of paste
JP2007100008A (en) * 2005-10-07 2007-04-19 Toyo Ink Mfg Co Ltd METHOD FOR PREPARING epsilon-PHTHALOCYANINE PIGMENT
JP2007277449A (en) * 2006-04-10 2007-10-25 Toyo Ink Mfg Co Ltd Method for producing fine organic pigment
US7540653B2 (en) * 2006-09-15 2009-06-02 Premark Peg L.L.C. Mixing machine and associated sealing arrangement for bearings
JP2010115595A (en) * 2008-11-13 2010-05-27 Inoue Mfg Inc Planetary mixer
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CN102962892B (en) * 2012-11-29 2014-11-12 江苏莱斯兆远环保科技有限公司 Double-layer continuous stirring machine
CN102962892A (en) * 2012-11-29 2013-03-13 江苏莱斯兆远环保科技有限公司 Double-layer continuous stirring machine
CN103511448A (en) * 2013-09-29 2014-01-15 四川宏劲机械有限公司 Novel rotating bearing and planetary transmission stirring mechanism formed by novel rotating bearing
JP2016534875A (en) * 2013-11-08 2016-11-10 ヴゾア ゲーエムベーハーWUSOA GmbH Stirrer for mixing fluid
JP2018111067A (en) * 2017-01-12 2018-07-19 株式会社井上製作所 High shear type disperser
CN108502950A (en) * 2018-04-26 2018-09-07 深圳汇呈环保科技有限公司 A kind of processing method of pharmaceuticals industry waste water
JP2021023923A (en) * 2019-08-01 2021-02-22 方小剛 High efficiency paint mixer
EP3970498A1 (en) * 2020-09-21 2022-03-23 DIOSNA Dierks & Söhne GmbH Kneading machine for food products with sealing of the kneading tools
WO2022058477A1 (en) * 2020-09-21 2022-03-24 DIOSNA Dierks & Söhne GmbH Kneading machine for food dough with a seal of the kneading tools
CN117258651A (en) * 2023-11-09 2023-12-22 湖州新开元碎石有限公司 Equipment for continuously producing artificial soil by utilizing sand and tailing sludge

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