EP2314377A1 - Walzwerk - Google Patents

Walzwerk Download PDF

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Publication number
EP2314377A1
EP2314377A1 EP09013352A EP09013352A EP2314377A1 EP 2314377 A1 EP2314377 A1 EP 2314377A1 EP 09013352 A EP09013352 A EP 09013352A EP 09013352 A EP09013352 A EP 09013352A EP 2314377 A1 EP2314377 A1 EP 2314377A1
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EP
European Patent Office
Prior art keywords
roll
rolls
load
control
center
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.)
Granted
Application number
EP09013352A
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English (en)
French (fr)
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EP2314377B1 (de
Inventor
Yoshitaka Inoue
Choji Hatsugai
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
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Inoue Mfg Inc
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Publication date
Application filed by Inoue Mfg Inc filed Critical Inoue Mfg Inc
Priority to EP09013352.1A priority Critical patent/EP2314377B1/de
Publication of EP2314377A1 publication Critical patent/EP2314377A1/de
Application granted granted Critical
Publication of EP2314377B1 publication Critical patent/EP2314377B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers

Definitions

  • the present invention relates to a roll mill to be used for wet-dispersion, particularly a roll mill to be used for a milling-dispersing treatment of a substance such as fine powder or nano particles in a material to be treated in production steps of various products such as ink, paint, ceramics, medicines, foods and electronic materials.
  • the roll mill for a milling-dispersing treatment of a material to be treated generally comprises a rear roll and a front roll movably mounted on a frame, each roll has a roll shaft on each end portion, the roll shaft is provided with a bearing not shown in the figure, and a pressing force is applied via the roll shaft.
  • Bearings for roll shafts of a center roll positioned between the rear roll and front roll are fixed on the frame. Therefore, between the rolls, "a pressing force b" exists on a contact line of the roll on the pressing side and "a reaction force a" is generated on a contact line of the roll on the fixed side.
  • Crowns R1, R2 are formed on the surface of the roll so that the pressing force (contact reaction force) would be in a constant distribution (flat single line) on the contact line, not like a curve c or d as shown in Fig.2 . And, the pressing side roll and the fixed side roll are rotated with the numbers of revolution being different from each other, and driven so that a frictional force would be generated between the rolls, whereby the frictional force plays a role for dispersion effects.
  • a finite-element analysis model of a combination of two rolls being in contact with each other is prepared; a nonlinear analysis wherein a contact portion is extended while the load is incrementally added on the contact line, is conducted; and based on the analysis, relations of the pressing force from the rear roll P1, the pressing force from the front roll P2, the crown of the rear roll R1, the crown of the center roll R2, a crown of the front roll R3, a distance between the rear roll and center roll ⁇ 1 and a distance between the center roll and front roll ⁇ 2 can be specifically obtained.
  • the roll mill is limited by a certain roll size and also the pressing force on dispersion processing required by the users. Using them, at first, a static analysis of the roll is once carried out. From this result, it is possible to determine the configuration of the crown curve formed on the roll and the peak value of the curve (usually exists at the center). Then, by incorporating the analysis results, conversion to roll analysis model including the information of crown is carried out. Using two pieces of this model, a contact analysis model wherein only the crown peak portions at the center are in contact with each other from the initial stage, is made.
  • One of the rolls is a fixed roll, and its both ends are supported, and a constant load is applied from both ends of another roll, and in this manner, a finite-element nonlinear contact analysis is carried out in accordance with a load incremental analysis method. Accordingly, the load is finely classified into respective steps and finally reaches P1 or P2.
  • the result shows the configuration represented by "constant reaction force" in the schematic view of Fig.2 . From this result, a distribution having a constant pressing force (or reaction force) on the contact line is obtained, and concomitantly R1, R2, R3, P1, P2, ⁇ 1, ⁇ 2 are obtained as interrelated numerical values.
  • R1, R2, R3 are used as the crown amounts at the time of designating the rolls, and the rest i.e. P1, P2, ⁇ 1, ⁇ 2 are numerical values used for automatic control.
  • the automatic control of roll mill is preferably carried out by the control of displacement by detecting the position of roll with a sensor.
  • the following problems are caused only with the control of displacement, it is necessary to conduct a partial correction by monitoring the load in addition to the control of displacement.
  • the following inconvenience is caused by unbalance of loads between the right and left ends of roll.
  • a contact line pressure between the rolls is of substantially flat distributed load at the portion that balances with the crown configuration formed on the roll.
  • A, B are fulcrums
  • C is a center point
  • nip in the technical field of the roll mill, and especially, the nip of the material-feeding side (first clearance) is called as “feed nip”, and the nip of the material-dispersing side (secondary clearance) is called as “apron nip”. Both of "feed nip” and “apron nip” are called as “the nip” hereinafter.
  • a film thickness of the materials through the nip at the initial stage is "e" which is the same as the clearance "e”.
  • the film thickness e reduces as the milling and dispersing operation proceeds.
  • the program be constructed so that when a large, but not a level of emergency shutdown, disturbance is caused, the control is temporarily changed from the control of displacement to the control of load, and immediately after constraint of disturbance, the control is returned from the control of load to the control of displacement.
  • the present invention provides a roll mill to be used for a milling-dispersing treatment of a substance such as fine powder or nano particles, in a material to be treated, which comprises a fixed roll fixed to a frame; a transfer roll disposed in such a manner that it may be touched to or detached from the fixed roll, the transfer roll being slightly movable in a perpendicular direction to the fixed roll by a servomotor and a ball screw; between the fixed roll and the transfer roll, a laser sensor for measuring the distance between the rolls and a load sensor for measuring a pressing force between the rolls; an electronic automatic control mechanism for keeping a constant distance and a constant pressing force between the fixed roll and the transfer roll by feed back of detected signals sent with time from respective sensors, wherein the servomotor is driven by the electronic automatic control mechanism to successively adjust the position of the transfer roll.
  • the present invention provides a triple roll mill having three rolls arranged in parallel in a lateral direction, wherein the fixed roll is a center roll fixed at the center of the frame, and the transfer roll comprises a front roll and a rear roll disposed before and behind the center roll, the front and rear rolls being automatically controlled respectively.
  • the automatic control is basically constructed by a control of displacement by monitoring the load with a load sensor and controlling the distance between the rolls with the laser sensor.
  • a program is composed in such a manner that when a large disturbance occurs, the control is temporarily changed from a control of displacement to a control of load, and immediately after constraint of disturbance, the control is returned from the control of load to the control of displacement.
  • the present invention provides an automatic control with a program that the distance between the rolls is a numerical value obtained by adding a function with time e(t) which shows a fluctuation of the film thickness of the materials through the nip with time to the distance D between roll shafts taking into account the collapse of rolls under operation.
  • an automatic control is carried out by using the control of displacement and the control of load in combination, and a predetermined distance between the rolls can be maintained with time by a feed back control, by which it is possible to obtain a constant pressing force (reaction force) distribution on a contact line using a roll provided with a crown, and to obtain a roll mill such as a triple roll mill which can be operated always under a constant contact force, scheduled to correspond to self-alignment, collapse allowance of rolls, viscosity fluctuation of materials to be treated, occurrence of abnormal load, etc.
  • a feed back control by which it is possible to obtain a constant pressing force (reaction force) distribution on a contact line using a roll provided with a crown, and to obtain a roll mill such as a triple roll mill which can be operated always under a constant contact force, scheduled to correspond to self-alignment, collapse allowance of rolls, viscosity fluctuation of materials to be treated, occurrence of abnormal load, etc.
  • the particle size distribution after dispersion is narrower than conventional roll mills, and by employing the automatic control, it becomes possible to transfer the operation that has been relied on human control techniques from human skill to machine.
  • the present invention is applicable to various types of roll mills to be used for a milling-dispersing treatment of a substance such as fine powder or nano particles in a material to be treated in production steps of various products such as ink, paint, ceramics, medicines, foods and electronic materials.
  • Figs.5 and 6 show as an example of the roll mill of the present invention, a triple roll mill comprising a center roll 1 fixed at the center and a front roll 2 and a rear roll 3 disposed in parallel before and behind it in the lateral direction in such a manner that these rolls may be touched to or detached from the fixed roll.
  • a bearing 5 supporting roll shafts 4 of the center roll 1 is fixed to a frame (now shown) and the front roll 2 and rear roll 3 are positioned at both sides thereof.
  • Fig.6 shows an example of an installed portion.
  • a servomotor bracket 6 is fixed to the frame, and thereon a servomotor used exclusively for displacement driving (not shown) is mounted, and the torque of the servomotor is transmitted to a ball screw coupling 7.
  • a ball screw coupling 7 In concurrence with the transmission of torque, it receives a reaction force transmitted via a ball screw 8 and transmits it to the motor bracket 6.
  • a bearing 9 is inserted between them, and a load cell (load sensor) 10 for measurement of the reaction force is also installed between the bracket 6 and the bearing 9.
  • the ball screw 8 and ball screw coupling 7 are firmly connected with key engagement, and the torque is transmitted to the ball screw.
  • the torque is converted to an ahead power (propulsion) within the ball screw, and the ahead power (propulsion) is transmitted to a ball bearing holder 12 via a roll push bar 11.
  • the ball screw 8 and roll push bar 11 are installed on one screw-fixing plate 13, an LM (linear motion) guide 14 is installed on the screw-fixing plate. Further, a similar LM guide 15 is installed on the roll bearing holder 12, and these two LM guides move on common two rails to keep the straight forward movement of both.
  • LM linear motion
  • Fig.6 shows the example wherein the holding plate is fixed to a frame, i.e., a holding plate 13a is fixed to the frame and the ball screw 8 is supported by the holding plate 13a through such a bearing 20 as a cylindrical rolling radial bearing.
  • the ball screw is movable axially under supported by the holding plate.
  • a roll shaft 16 of the rear roll (front roll) body is inserted into the bearing of the roll bearing holder 12.
  • a driving motor (not shown) is connected to each of the roll shaft 16.
  • the Schmidt coupling 17 has a mechanism that permits parallel translation of a shaft during rotation in power transmission though different axes, it is possible to transmit the rotation driving force from the driving motor to the roll shaft 16 at a equal rotating velocity while allowing the roll shaft 16 to move in a perpendicular direction by this mechanism.
  • a laser displacement meter (laser sensor) 18 is fixed to the servomotor bracket 6, and the distance is measured by directly irradiating a roll flange portion at the end of roll with a laser beam.
  • the servomotor bracket 6 is fixed to the frame, and the bearing 5 for the roll shaft 4 of the center roll 1 is also fixed to the frame. Therefore, by measuring the distance between the servomotor bracket 6 and the roll (flange) , the distance between the roll shaft 4 of the center roll and roll shaft 16 of the rear roll 3 (front roll 2) can be measured.
  • the distance between the servomotor bracket 6 and the roll (flange) is determined by the initial pressing force (static) under the static condition of the roll, and thereafter a feed back control is carried out during operation of the roll so that the distance will be constant. For this control, a ball screw propulsion by a servomotor torque is used. Further, an electronic automatic control mechanism is disposed so that the servomotor will be actuated in a moment and a constant distance and a constant pressing force will be maintained.
  • the control system illustrated in Fig. 6 and Fig.7 is disposed at four portions in total i.e. left and right ends of the front roll 2 and left and right ends of the rear roll 3, these are fixed via LM guides on the frame on the same plane, and left and right ends of the center roll are fixed to the frame. Accordingly, when the above roll mill is operated, the distance between rolls and the inter-roll pressing force applied to the rolls are informed in a moment by the laser sensor 18 and load sensor (load cell) 10.
  • the roll shaft 16 is slightly moved in a perpendicular direction against the roll, by which optimum operation can be made automatically with a constant distance under a constant pressing force, thereby obtaining the improved dispersion effects.
  • the automatic control is made on the basis of the control of displacement in which the load is monitored by a load sensor and the distance between rolls is controlled by a laser sensor.
  • the program is composed so that when a large disturbance occurs, the control is temporarily changed from the control of displacement to the control of load, and immediately after constraint of the disturbance, the control is returned from the control of load to the control of displacement.
  • the present invention also employs the automatic control with a program that the distance between the rolls is a numerical value obtained by adding a function with time e(t) which shows a fluctuation of the film thickness of the materials through the nip with time to the distance D between the roll shafts taking into account the collapse of rolls under operation.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP09013352.1A 2009-10-22 2009-10-22 Walzwerk Active EP2314377B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09013352.1A EP2314377B1 (de) 2009-10-22 2009-10-22 Walzwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09013352.1A EP2314377B1 (de) 2009-10-22 2009-10-22 Walzwerk

Publications (2)

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EP2314377A1 true EP2314377A1 (de) 2011-04-27
EP2314377B1 EP2314377B1 (de) 2019-06-19

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2465050C1 (ru) * 2011-05-31 2012-10-27 Государственное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ГОУ ВПО "КубГТУ") Вальцовый станок
CN104475188A (zh) * 2014-11-14 2015-04-01 张祥平 一种高速双辊破碎机
CN105255219A (zh) * 2015-11-16 2016-01-20 南通宝聚颜料有限公司 一种层叠式氧化铁黄粘度调节装置
WO2016113605A1 (en) * 2015-01-12 2016-07-21 So Kwok Fai Edmund A ceramic material granulator
CN107487071A (zh) * 2017-08-30 2017-12-19 深圳市点网络科技有限公司 一种用于激光全息图文印刷的组合式模压装置
CN107793036A (zh) * 2017-11-30 2018-03-13 绵阳市奇帆科技有限公司 智能电子浆料玻璃粉生产系统
CN109675663A (zh) * 2019-01-25 2019-04-26 昆山得士成自动化设备有限公司 一种纳米晶带材破碎加工装置
CN113333070A (zh) * 2021-05-28 2021-09-03 河南工业大学 磨粉机及其调控方法
CN115415000A (zh) * 2022-08-29 2022-12-02 广东必得星辉化学工业有限公司 一种电子膜油墨生产用加工设备及其加工工艺
CN115870041A (zh) * 2022-12-28 2023-03-31 浙江奥克珠光颜料有限公司 颜料生产用充粉辊磨机
CN116493119A (zh) * 2023-06-26 2023-07-28 山东第一医科大学附属省立医院(山东省立医院) 一种疼痛治疗药物破碎装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953290A1 (de) * 1998-04-30 1999-11-03 CARLE & MONTANARI S.p.A. Verfahren und Vorrichtung zur Vorzerkleinerung von Konfektmaterial
WO2007121596A2 (de) * 2006-04-21 2007-11-01 Bühler AG Walzwerk zur behandlung viskoser massen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953290A1 (de) * 1998-04-30 1999-11-03 CARLE & MONTANARI S.p.A. Verfahren und Vorrichtung zur Vorzerkleinerung von Konfektmaterial
WO2007121596A2 (de) * 2006-04-21 2007-11-01 Bühler AG Walzwerk zur behandlung viskoser massen

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2465050C1 (ru) * 2011-05-31 2012-10-27 Государственное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ГОУ ВПО "КубГТУ") Вальцовый станок
CN104475188A (zh) * 2014-11-14 2015-04-01 张祥平 一种高速双辊破碎机
WO2016113605A1 (en) * 2015-01-12 2016-07-21 So Kwok Fai Edmund A ceramic material granulator
CN105255219A (zh) * 2015-11-16 2016-01-20 南通宝聚颜料有限公司 一种层叠式氧化铁黄粘度调节装置
CN105255219B (zh) * 2015-11-16 2017-08-25 南通宝聚颜料有限公司 一种层叠式氧化铁黄粘度调节装置
CN107487071B (zh) * 2017-08-30 2019-07-26 深圳市一点网络科技有限公司 一种用于激光全息图文印刷的组合式模压装置
CN107487071A (zh) * 2017-08-30 2017-12-19 深圳市点网络科技有限公司 一种用于激光全息图文印刷的组合式模压装置
CN107793036A (zh) * 2017-11-30 2018-03-13 绵阳市奇帆科技有限公司 智能电子浆料玻璃粉生产系统
CN109675663A (zh) * 2019-01-25 2019-04-26 昆山得士成自动化设备有限公司 一种纳米晶带材破碎加工装置
CN109675663B (zh) * 2019-01-25 2024-02-13 昆山得士成自动化设备有限公司 一种纳米晶带材破碎加工装置
CN113333070A (zh) * 2021-05-28 2021-09-03 河南工业大学 磨粉机及其调控方法
CN115415000A (zh) * 2022-08-29 2022-12-02 广东必得星辉化学工业有限公司 一种电子膜油墨生产用加工设备及其加工工艺
CN115870041A (zh) * 2022-12-28 2023-03-31 浙江奥克珠光颜料有限公司 颜料生产用充粉辊磨机
CN115870041B (zh) * 2022-12-28 2023-11-24 湖北卡乐尔新材料科技有限公司 颜料生产用充粉辊磨机
CN116493119A (zh) * 2023-06-26 2023-07-28 山东第一医科大学附属省立医院(山东省立医院) 一种疼痛治疗药物破碎装置
CN116493119B (zh) * 2023-06-26 2023-09-05 山东第一医科大学附属省立医院(山东省立医院) 一种疼痛治疗药物破碎装置

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