EP0212882A2 - Mühle zur Herstellung von Getreideflocken - Google Patents

Mühle zur Herstellung von Getreideflocken Download PDF

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Publication number
EP0212882A2
EP0212882A2 EP86305880A EP86305880A EP0212882A2 EP 0212882 A2 EP0212882 A2 EP 0212882A2 EP 86305880 A EP86305880 A EP 86305880A EP 86305880 A EP86305880 A EP 86305880A EP 0212882 A2 EP0212882 A2 EP 0212882A2
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
mill
shaft
coolant flow
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.)
Withdrawn
Application number
EP86305880A
Other languages
English (en)
French (fr)
Other versions
EP0212882A3 (de
Inventor
Walter E. Buske
Stanley Woodworth
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.)
Wolverine Corp
Original Assignee
Wolverine Corp
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 Wolverine Corp filed Critical Wolverine Corp
Publication of EP0212882A2 publication Critical patent/EP0212882A2/de
Publication of EP0212882A3 publication Critical patent/EP0212882A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B02C4/30—Shape or construction of rollers
    • 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
    • B02C4/44—Cooling or heating rollers or bars

Definitions

  • This invention relates to mills, and more particularly to mills for production of cereal flakes from processed grains such as corn, wheat or rice, and to rolls for use in such flaking mills and the like.
  • processed grains with additives in the form of pellets of about three-sixteenths inch dimension are passed through a flaking mill to produce flakes of about 0.015 inch thickness and a diameter of about one inch.
  • the pellets be formed into flakes of uniform thickness for further processing such as toasting, and because of the hard pellets, large external forces (forces at the roll nip of over 100,000 pounds) are required to satisfactorily form the flakes and the dimensions of the nip between the flaking rolls must be controlled with precision.
  • the flaking process generates substantial quantities of heat which must be removed in order to satisfactorily produce cereal flakes of desired quality and uniformity.
  • a roll mill with opposed side frames between which are rotatably mounted a pair of rolls, together with means for driving the rolls in opposite directions, guide means for feeding material to be milled into the nip between the rolls and means beneath the rolls for collecting the milled product.
  • Each roll includes a through shaft on which a set of concentric sleeves are mounted with a coolant flow passage defined between the sleeves.
  • the outer sleeve is of hardened metal and structure defining a spiral coolant flow path is disposed between the two sleeves, a coolant inlet at one end of the through shaft is in communication with the spiral flow path and a coolant outlet at the other end of the through shaft is similarly in communication with the spiral coolant flow path.
  • nonmetallic material in a particular embodiment an expanding aggregate
  • one roll is fixed in position and the other roll is supported for movement toward and away from the fixed roll to vary the dimension between the nip of the two rolls
  • the adjustment mechanism including a double acting hydraulic cylinder mounted on the fixed frame member and having a rod secured to the auxiliary roll support frame and carrying a transducer for sensing the position of the rod to provide precise positioning of the moveable roll relative to the fixed roll.
  • each roll has a diameter of about twenty six inches and a length of about forty inches and includes a through hardened alloy steel outer sleeve (of hardness greater than 50 Rockwell C), a steel inner sleeve, and a set of internal spiral cooling passages that are bounded by the steel sleeves. Coolant is flowed under turbulent conditions (Reynolds Number above 2000) through the cooling passages. An adjustable angle doctor blade with oscilating drive is associated with each roll. The system provides a roll nip force of approximately 250,000 pounds across the forty inch long nip and the deflection of each roll is less than one half thousandth inch. The mill produces quality cereal flakes of uniform thickness and high quality from processed grain pellets.
  • the flaking mill shown in Figures 1-3 includes two heavy duty side frames 10,12 (seven inch thick solid hot rolled steel) between which flaking rolls 14, 16 (each about twenty- six inches in diameter and forty inches long) are mounted.
  • Each side frame 10,12 has a base 18 that is mounted on concrete pedestal 20 by a five-sixteenths inch thick vibration pad. Grain pellets to be flaked are fed into feed chute 24 for flow into the nip of rolls 14,16 and the flaked product is discharged onto a transport conveyor disposed between pedestals 20.
  • Rolls 14,16 are driven by 100 horsepower AC motors 30, each of which is coupled to its corresponding roll via high torque drive belt 32 and shaft mounted speed reducer 34.
  • the speed of each roll is monintored by toothed gear 36 and cooperating magnetic pickup.
  • An adjustable angle doctor blade 40 associated with each roll is mounted on shaft 38 for pivoting movement as controlled by air cylinders 42, the two blades 40 being oscillated by drive 44 and cam 46 that produce an axial travel about one-eighth inch.
  • each flaking roll 14, 16 includes a steel shaft 60 that has a body section 62 of twelve inches outer diameter on which inner sleeve 64 (twenty- two inches in outer diameter and one and one quarter inches wall thickness) is secured by end plates 66 that are welded to body section 62 and to sleeve 64.
  • the space between shaft 60 and sleeve 64 is filled with Por-rok expansion aggregate 68 that expands about 0.3 percent as it cures over an interval of two to three days and provides a rigid composite roll base of shaft 62, sleeve 64, endplates 66 and aggregate 68.
  • sleeve 64 Continuously welded on the outer surface of sleeve 64 are a series of four steel flats 72 (each of three-eighths inch by one half inch cross section) in a spiral with a pitch of one and one half inch and a lead of six inches.
  • the outer surfaces of the spiral flats 72 are machined to a precision diameter of 22 7/16 inches.
  • Outer sleeve 74 (a 4150 steel alloy forging that has an outer diameter of about 26 inches and a wall thickness of 1 25/32 inches and that is through hardened to Rockwell C58-64) is shrink fitted over the spiral flats 72 to provide an interference fit of about 0.015-0.020 inch, and to define four spiral coolant circulation channels 76 between the inner surface of hardened outer sleeve 74 and the outer surface of inner sleeve 64.
  • a ring 78 is welded to each end of sleeve 64 and end disks 80 are welded to shaft 60 and sealed to outer sleeve 74, the sleeve-disk joints being sealed by 0-ring 82 and cap plates 84 with thermal insulation 86 disposed on ene plate 80 between each seal disk 84 and the weld 78.
  • each shaft 60 Formed in each end of each shaft 60 is a coolant flow passage that includes an axial portion 90 and four radial portions 92 that extend into the radial flow region between endplates 68 and 80 with rings 78 providing flow restrictions between those regions and the inlets and outlets of the coolant flow passages 76.
  • Formed on the outer surface of the shaft 60 on either side of body section 62 is a tapered surface 94 on which a spherical roller bearing assembly 96 (SKF-23248K) is mounted and secured by ring nut 98. Seal. plates 100, 102 carry split seals 104 and protect the bearings 96.
  • coolant is flowed through inlets 110 and rotary couplings 112 to the shaft inlet passage portions 90 for flow at a rate of 10 to 100 gallons per minute to produce turbulent flow within flow passages 76 for cooling the rolls 14, 16, and then discharge at the opposite end of the shafts 60 through couplings 114 and conduits 116.
  • the bearing assemblies 96 for roll 16 are mounted in auxiliary frame members 120 that are of the same thickness as side frames 10 and 12.
  • auxiliary frame members 120 Welded to each auxiliary frame 120 are two two inch thick side gussets 122, 124 that extend downwardly on either side of the main frame members 10, 12 and are supported on pivot shafts 126 that are press fitted into side frames 10, 12 respectively to define a pivot axis about seventeen inches below the axis of roll 16.
  • Pivot shafts 126 are hollow and the doctor blade shaft 38 passes through those pivot shafts 126.
  • Transverse pivot shaft 130 Secured at the upper end of auxiliary frame 120 by clamp member 128 is transverse pivot shaft 130 (located about twenty inches above the axis of roll 16 - thus providing a slightly greater than 2:1 mechanical advantage).
  • each actuator 134 includes a servo cylinder which has a bore of seven inches diameter and in which is disposed a double acting piston with a five inch stroke.
  • a sonic probe in each hydrdaulic cylinder unit 134 monitors the position of the piston and provides position resolution and repeatability within 0.0001 inch.
  • the piston rod 138 extends into a bore 142 in auxiliary frame 120 and is threaded into transverse shaft 130 to couple auxiliary frame 120 to actuator cylinder unit 134.
  • the two cylinder units 134 are individually controllable to allow non-parallel disposition of roll 16 to compensate as necessary for unequal product feed conditions.
  • the specific roll gap is selected by an operator adjustable thumb wheel switch and the operator may move the rolls together or apart with a jogging function. Whenever this system is shut down, servo cylinders 134 move roll 16 to a position of maximum separation and upon the system being repowered, roll 16 is moved to its original position as specified by the servo cylinder controllers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Press Drives And Press Lines (AREA)
EP86305880A 1985-08-07 1986-07-30 Mühle zur Herstellung von Getreideflocken Withdrawn EP0212882A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76342385A 1985-08-07 1985-08-07
US763423 1985-08-07

Publications (2)

Publication Number Publication Date
EP0212882A2 true EP0212882A2 (de) 1987-03-04
EP0212882A3 EP0212882A3 (de) 1988-04-27

Family

ID=25067809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86305880A Withdrawn EP0212882A3 (de) 1985-08-07 1986-07-30 Mühle zur Herstellung von Getreideflocken

Country Status (4)

Country Link
EP (1) EP0212882A3 (de)
JP (1) JPH0657323B2 (de)
KR (1) KR870001872A (de)
CN (1) CN86104859A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000054608A1 (de) * 1999-03-17 2000-09-21 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur behandlung und verarbeitung alkaloid-, öl- und proteinhaltiger lupinensamen
KR200452016Y1 (ko) * 2010-05-24 2011-01-25 최종묵 곡물 분쇄장치용 분쇄롤러
WO2016128274A1 (de) * 2015-02-09 2016-08-18 Khd Humboldt Wedag Gmbh Mahlwalze und verfahren zum abziehen einer bandage und aufschrumpfen einer bandage auf die welle der mahlwalze

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100308850B1 (ko) * 1998-10-31 2002-04-24 무 호 장 분쇄기의수냉식칼날
CN105665064A (zh) * 2013-11-13 2016-06-15 蒋春花 一种金属破碎机的工作方法
CN103721783B (zh) * 2014-01-10 2016-03-23 中信重工机械股份有限公司 一种无壳体式对辊挤压机
CN106541602A (zh) * 2016-11-27 2017-03-29 河南龙昌机械制造有限公司 锯齿形对辊压片机
CN110052306A (zh) * 2019-05-28 2019-07-26 肇庆学院 一种化工固体原料粉碎设备
CN110773303B (zh) * 2019-10-31 2021-08-31 无锡蜂巢生态农业有限公司 一种高效环保的农业种植用肥料粉碎装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE957540C (de) * 1953-09-13 1957-02-07 Draiswerke Ges Mit Beschraenkt Walze, insbesondere fuer Reibwalzenmuehlen
FR1183202A (fr) * 1956-09-21 1959-07-03 United States Pipe Foundry Cylindres de broyage et procédé de fabrication
US3881663A (en) * 1974-02-14 1975-05-06 Andrew M Brown Roll mill for flaking grain and the like
DE2655925A1 (de) * 1976-12-09 1978-06-15 Bauermeister Hermann Maschf Nahrungsmittel-walzvorrichtung
US4154408A (en) * 1977-12-19 1979-05-15 N. Hunt Moore & Associates, Inc. Flaking mill adjustment and shock absorbing means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE957540C (de) * 1953-09-13 1957-02-07 Draiswerke Ges Mit Beschraenkt Walze, insbesondere fuer Reibwalzenmuehlen
FR1183202A (fr) * 1956-09-21 1959-07-03 United States Pipe Foundry Cylindres de broyage et procédé de fabrication
US3881663A (en) * 1974-02-14 1975-05-06 Andrew M Brown Roll mill for flaking grain and the like
DE2655925A1 (de) * 1976-12-09 1978-06-15 Bauermeister Hermann Maschf Nahrungsmittel-walzvorrichtung
US4154408A (en) * 1977-12-19 1979-05-15 N. Hunt Moore & Associates, Inc. Flaking mill adjustment and shock absorbing means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000054608A1 (de) * 1999-03-17 2000-09-21 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur behandlung und verarbeitung alkaloid-, öl- und proteinhaltiger lupinensamen
KR200452016Y1 (ko) * 2010-05-24 2011-01-25 최종묵 곡물 분쇄장치용 분쇄롤러
WO2016128274A1 (de) * 2015-02-09 2016-08-18 Khd Humboldt Wedag Gmbh Mahlwalze und verfahren zum abziehen einer bandage und aufschrumpfen einer bandage auf die welle der mahlwalze

Also Published As

Publication number Publication date
JPS6233553A (ja) 1987-02-13
JPH0657323B2 (ja) 1994-08-03
KR870001872A (ko) 1987-03-28
CN86104859A (zh) 1987-04-01
EP0212882A3 (de) 1988-04-27

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Inventor name: BUSKE, WALTER E.

Inventor name: WOODWORTH, STANLEY