US3790092A - Grinding apparatus - Google Patents

Grinding apparatus Download PDF

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Publication number
US3790092A
US3790092A US00230393A US3790092DA US3790092A US 3790092 A US3790092 A US 3790092A US 00230393 A US00230393 A US 00230393A US 3790092D A US3790092D A US 3790092DA US 3790092 A US3790092 A US 3790092A
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United States
Prior art keywords
grinding
discs
space
disc
water
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Expired - Lifetime
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US00230393A
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English (en)
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R Reinhall
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Individual
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Individual
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills

Definitions

  • ABSTRACT The invention relates to a grinding apparatus of the type having grinding discs arranged in a housing of which at least one is rotatable and which between themselves form a grinding space for the grinding produce such as wooden chips fed dispersed in an aqueous vehicle to the centre of the space to be forced therethrough in outward direction under strong axial grinding pressure.
  • the temperature of the vehicle is increased which results in evaporation of water. which in turn unfavourably affects the produce such as the wooden chips the fibres of which may be locally overheated and miscoloured.
  • Grinding apparatuses of this kind may have grinding discs subdivided into concentrical sections adjustable in axial direction relative one another'for compensation of the non-uniform wear on the grinding surfaces of the discs as is evident from e.g., the US Pat. application Ser. No. 884 603 filed Dec. 12, 1969 now US. Pat. No. 3,684,200. I
  • a high concentration of the pulp in the dispersion at the start of the disintegration process between the grinding discs is, highly desirable which substantially limits the margin of water loss resulting from boiling off or evaporation.
  • One main object of the invention is to eliminate the drawbacks stated hereinbefore.
  • At least one of the grinding discs which preferably is stationary is formed with ducts for supply of water to the space at one or several places located at the same radial distance or at radially differing distances from the cen# tre of the discs between the inner and outer circumferences thereof.
  • the grinding produce will thus be cooled or the dispersion will be diluted during the defibration or refining thereof during its movement in outward direction between the grinding discs. It is even possible to supply more water than the quantity which is evaporated so that the water content of the pulp is increased during the treatment between the grinding discs. This is especially important when the pulp when entering the grinding disc has a concentration amounting from about 30 to about 40 per cents.
  • reference numeral 10 denotes a portion of the rigid frame of the grindingapparatus which frame forms a casing within which a shaft 12 carrying a grinding disc 14 is mounted rotatably.
  • the grinding disc carries a plurality of concentrically arranged disc elements, which in the present case are three and denoted l6, l7 and 18, respectively, each of said disc elements being composed of segments secured by screws onto the disc 14 about the circumference thereof. Disposed in the centre may. be a disc 20 which feeds the grinding produce radially outwards.
  • a stationary grinding disc is composed of three concentrically arranged annular retainer members 22, 23 and 24 for a corresponding number of disc elements 26, 27am 28, respectively, which latter also each are composed of segments.
  • the surfaces facing each other of the grinding disc segments on both grinding discs are in known manner formed with radial and peripheral ribs and grooves .in order to attain the optimum grinding effect.
  • the grinding produce which may have the form of wood chips or partially dismembered fibre pulp is fed to the inner circumference of the grinding discs through a central channel 30 formed in the stationary frame. From said place the grinding produce is advanced radially outwards between the segments of the two grindingdiscswhich segments between themselves fonn a grinding space which in the illustrated embodiment is composed of three concentric zones 31, 32, 33 which progressively decreases in'width in radial direction.
  • the rotatable grinding disc 14 is subjected to an axially acting pressure from one or several means not shown here, such as hydraulically actuated servo motors in accordance with the disclosure of e.g., the US Pat. No. 2 891 733.
  • the three concentric annular holder members 22 to 24 are together with the disc segments 26 to 28 supported by them adjustably relatively one another in axial direction.
  • the outermost annular holder member 24 is in this embodiment-preferably by means of screw joints 36v or similar connecthe annular holder members. 22 and 23 are arranged to be actuated by an adjusting mechanism generally denoted 34 and 35, respectively.
  • the axial adjustment is obtained by providing the opposing surfaces of the annular holder members 23,24 with threads 40 so that the annular member 23 is rotatable relatively to the axially fixed annular member 24.
  • the casing has an annular projection 39 formed with threads 38 which engage corresponding threads on the innermost annular member 22 which thereby also is displaced in axial direction when being rotated.
  • Each of the annular members 22, 23 have at their lateral surfaces facing the casing 10 an annular recess 42 formed with an inner gear ring 44 engaged by a gear wheel 46 mounted on a shaft 48 in the stand 10 and adapted to be rotated by means of a hand wheel.
  • the gear wheel 46 is locked in predetermined position by means of a nut 52.
  • both inner stationary annular holder members 22 and 23 have a rotation mechanism 34 and 35, respectively, whereas the outermost annular member 24 is rigidly anchored in the casing 10.
  • Each of the two inner annular holder members 22, 23 is individually displaceable axially in one or the opposite direction by rotation thereof by means of the hand wheels 35 and 50 in order thereby to adjust the widths of the spaces 31 and 32, respectively, in relationship to one another and to the uttermost space 33.
  • a compensation can be effected in a simple way for nonuniform wear on the grinding surfaces in the various grinding space zones 31, 32 and 33, respectively even during operation of the apparatus.
  • the grinding operation need not be interruptedfor such an adjustment of the spaces.
  • the annular holder members 22 or 23 are advanced in relative parallel direction so that the parallelism between each pair of disc elements forming one of the grinding spaces is always maintained and a uniform grinding effect'around the circumference of the space is ensured even during the adjusting movement. It is obvious that the axial displacement between the. annular holder members 22 to 24 can be effected by means of other devices than those shown here.
  • conduits 54, 55 which may be controlled by valves 56 disposed therein, water is supplied under pressure to axial channels 58 formed in the casing and connected to one or the otherof said conduits, which channels each open into an annular channel 60 formed on that side of each of the outer annular holder members 23, 24, respectively, which faces the frame.
  • connection channels 62 extend to an additional annular channel 64 in each of the two annular holder members which spread water around the circumference of the disc and to the spaces 32 and,33, through tolerances 66 between the grinding discs, which tolerances form substantially axially extending ducts.
  • the supplied water has preferably lower temperature than that temperature which prevails in the space so that the water serves the dual function of increasing the water content of the grinding produce or the fibres and as coolant.
  • the space in the final zone i.e., between the outermost grinding segment sections 18 and 28 may have a width of some hundredths of l millimeter only, for which reason a loss of water during the separation of the fibres and the fibrillation of the fibres proper is especially perceptible as a result of the subdivision of the spaces of the grinding zones into a plurality of subzones and the adjustability of said spaces in order always to obtain a maximum of effective treatment.
  • the quantity of water supplied to the uttermost space 33 may be equal or greater than that supplied to the intermediate space 32. As is generally known, the circumferential dimension of the space increases with the square of the radius.
  • the invention is also applicable to grinding discs which are not adjustable in relation to one another during operation, although the illustrated embodiment with adjustable grinding discs is especially advantageous due to the feature that the grinding spaces by the additional supply of water to the interior thereof makes it possible to maintain the grinding effect at a maximum level over the entire radial extension of the grinding discs.
  • a grinding apparatus comprising:
  • said grinding discs being stationary and comprising a plurality concentrically arranged disc segments and holder members for said segments; I 1 g (1. said segments being spaced from one another in a radial direction to provide ducts extending substantially axially therethrough, and;
  • means for supplying liquid to said stationary disc and to said grinding space during the grinding operation comprising:
  • a plurality of radially spaced annular channels defined between said holder members and said disc segments adapted to supply liquid to said grinding space through said ducts.
  • a grinding apparatus in which the vegetable produce is fed centrally through said stationary disc and said disc segments form separate zones in said grinding space successively decreasing in width towards the periphery of the discs.
  • a grinding apparatus according to claim 2 in which said holder members are axially adjustable.

Landscapes

  • Polishing Bodies And Polishing Tools (AREA)
  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Detergent Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US00230393A 1971-03-16 1972-02-29 Grinding apparatus Expired - Lifetime US3790092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE03397/71A SE362102B (de) 1971-03-16 1971-03-16

Publications (1)

Publication Number Publication Date
US3790092A true US3790092A (en) 1974-02-05

Family

ID=20262025

Family Applications (1)

Application Number Title Priority Date Filing Date
US00230393A Expired - Lifetime US3790092A (en) 1971-03-16 1972-02-29 Grinding apparatus

Country Status (11)

Country Link
US (1) US3790092A (de)
JP (1) JPS56133337U (de)
AT (1) AT339703B (de)
CA (1) CA963705A (de)
DE (1) DE2209268C3 (de)
FI (1) FI51968C (de)
FR (1) FR2129683A5 (de)
GB (1) GB1382673A (de)
IT (1) IT950136B (de)
NO (1) NO140074C (de)
SE (1) SE362102B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942729A (en) * 1972-09-18 1976-03-09 Sca Projekt Aktiebolag Device for supplying treatment agent to ligno-cellulose containing material
US4357208A (en) * 1978-02-17 1982-11-02 Sca Development Aktiebolag Method of making pulp
WO1985004431A1 (en) * 1984-04-03 1985-10-10 Sunds Defibrator Aktiebolag Method and apparatus for refining lignocellulose-containing material
US4955549A (en) * 1986-08-07 1990-09-11 Sunds Defibrator Aktiebolag Apparatus for treatment of fibre suspensions
US5011091A (en) * 1989-08-10 1991-04-30 Haybuster Manufacturing Inc. Cellulose fiberization apparatus
US5248099A (en) * 1991-04-05 1993-09-28 Andritz Sprout-Bauer, Inc. Three zone multiple intensity refiner
US5335865A (en) * 1992-06-26 1994-08-09 Andritz Sprout-Bauer, Inc. Two-stage variable intensity refiner
US5709257A (en) * 1996-09-13 1998-01-20 Invention Machine Corporation Removing bark from wood chips
US20150291928A1 (en) * 2014-04-09 2015-10-15 Sk Innovation Co., Ltd. Apparatus and method for simultaneous operation of refining cellulosic biomass and mixing enzymes
US20170320239A1 (en) * 2014-10-27 2017-11-09 Mirko Winter Apparatus and Method for Reducing the Size of Fiber Composite Materials
CN118454804A (zh) * 2024-07-12 2024-08-09 安徽雪莲面粉有限责任公司 一种面粉生产磨粉装置及磨粉工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253613A (en) * 1978-02-17 1981-03-03 Reinhall Rolf Bertil Method and apparatus for controlling the effect of the centrifugal force on the stock in pulp defibrating apparatus
SE418626B (sv) * 1978-08-29 1981-06-15 Sunds Defibrator Sett och anordning for framstellning av massa i en skivraffinor
JP7153468B2 (ja) * 2018-05-25 2022-10-14 日本コークス工業株式会社 粉砕機
CN110369036A (zh) * 2019-07-23 2019-10-25 王国周 一种立式制砂机
DE102019219607A1 (de) * 2019-12-13 2021-06-17 BSH Hausgeräte GmbH Mahlscheibe eines Mahlwerks

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641164A (en) * 1946-07-08 1953-06-09 Hill Harold Sanford Method for processing fibrous pulp
US2801084A (en) * 1954-08-26 1957-07-30 Gerber Prod Differential injection rotary heater
US3077007A (en) * 1958-11-05 1963-02-12 Curlator Corp Feed mechanism for machines for processing fibrous material
US3273807A (en) * 1963-08-05 1966-09-20 Bauer Bros Co Refiner system
US3459379A (en) * 1967-01-18 1969-08-05 Beloit Corp Mechanical pulping apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641164A (en) * 1946-07-08 1953-06-09 Hill Harold Sanford Method for processing fibrous pulp
US2801084A (en) * 1954-08-26 1957-07-30 Gerber Prod Differential injection rotary heater
US3077007A (en) * 1958-11-05 1963-02-12 Curlator Corp Feed mechanism for machines for processing fibrous material
US3273807A (en) * 1963-08-05 1966-09-20 Bauer Bros Co Refiner system
US3459379A (en) * 1967-01-18 1969-08-05 Beloit Corp Mechanical pulping apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942729A (en) * 1972-09-18 1976-03-09 Sca Projekt Aktiebolag Device for supplying treatment agent to ligno-cellulose containing material
US4357208A (en) * 1978-02-17 1982-11-02 Sca Development Aktiebolag Method of making pulp
WO1985004431A1 (en) * 1984-04-03 1985-10-10 Sunds Defibrator Aktiebolag Method and apparatus for refining lignocellulose-containing material
US4955549A (en) * 1986-08-07 1990-09-11 Sunds Defibrator Aktiebolag Apparatus for treatment of fibre suspensions
US5011091A (en) * 1989-08-10 1991-04-30 Haybuster Manufacturing Inc. Cellulose fiberization apparatus
US5248099A (en) * 1991-04-05 1993-09-28 Andritz Sprout-Bauer, Inc. Three zone multiple intensity refiner
US5335865A (en) * 1992-06-26 1994-08-09 Andritz Sprout-Bauer, Inc. Two-stage variable intensity refiner
US5709257A (en) * 1996-09-13 1998-01-20 Invention Machine Corporation Removing bark from wood chips
US20150291928A1 (en) * 2014-04-09 2015-10-15 Sk Innovation Co., Ltd. Apparatus and method for simultaneous operation of refining cellulosic biomass and mixing enzymes
US10030223B2 (en) * 2014-04-09 2018-07-24 Sk Innovation Co., Ltd. Apparatus and method for simultaneous operation of refining cellulosic biomass and mixing enzymes
US20170320239A1 (en) * 2014-10-27 2017-11-09 Mirko Winter Apparatus and Method for Reducing the Size of Fiber Composite Materials
CN118454804A (zh) * 2024-07-12 2024-08-09 安徽雪莲面粉有限责任公司 一种面粉生产磨粉装置及磨粉工艺

Also Published As

Publication number Publication date
IT950136B (it) 1973-06-20
DE2209268B2 (de) 1978-01-26
NO140074B (no) 1979-03-19
CA963705A (en) 1975-03-04
DE2209268C3 (de) 1979-09-20
FI51968B (de) 1977-01-31
SE362102B (de) 1973-11-26
FR2129683A5 (de) 1972-10-27
NO140074C (no) 1979-06-27
ATA169972A (de) 1977-02-15
FI51968C (fi) 1977-05-10
JPS56133337U (de) 1981-10-09
GB1382673A (en) 1975-02-05
AT339703B (de) 1977-11-10
DE2209268A1 (de) 1972-10-12

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