EP0252204A1 - Dispositif pour le défibrage à sec d'une pâte fibreuse cellulosique, en particulier pour la préparation de masses absorbantes pour couches ou produits similaires - Google Patents

Dispositif pour le défibrage à sec d'une pâte fibreuse cellulosique, en particulier pour la préparation de masses absorbantes pour couches ou produits similaires Download PDF

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Publication number
EP0252204A1
EP0252204A1 EP87100633A EP87100633A EP0252204A1 EP 0252204 A1 EP0252204 A1 EP 0252204A1 EP 87100633 A EP87100633 A EP 87100633A EP 87100633 A EP87100633 A EP 87100633A EP 0252204 A1 EP0252204 A1 EP 0252204A1
Authority
EP
European Patent Office
Prior art keywords
hammers
rotor
machine according
machine
axis
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Withdrawn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
EP87100633A
Other languages
German (de)
English (en)
Inventor
Elio Trabattoni
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.)
NUOVA RED ITALIANA SpA
Original Assignee
NUOVA RED ITALIANA SpA
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 NUOVA RED ITALIANA SpA filed Critical NUOVA RED ITALIANA SpA
Publication of EP0252204A1 publication Critical patent/EP0252204A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D21D1/32—Hammer mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/066—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being pulp sheets

Definitions

  • the present invention relates to a machine for the dry defibering of fibrous cellulosic material and the like, particularly for preparing absorbent masses for disposable diapers and the like.
  • Mills for the dry defibering of fibrous cellulosic material or the like for preparing absorbent masses for disposable diapers are known.
  • these machines comprise a containment body which internally defines a substantially cylindrical chamber provided with at least one feed port for introducing in the chamber the material to be processed which, usually, is packaged in bands a few millimeters thick.
  • the containment body also has a plurality of output ports suitably sized for the discharge of the defibered material.
  • a rotor is accommodated, which is generally composed of a main shaft which is rotatably supported by the containment body and which can be operated with a rotary motion about its own axis, which generally coincides with the axis of the chamber.
  • the main shaft of the rotor supports a plurality of fixed or oscillating hammers which are arranged along the generatrix lines of a cylindrical surface the axis of which is the main shaft axis. With the rotation of the latter, the material introduced through the feed port is struck by the hammers which break the band of material and drag the detached portions along in their motion. During this motion, the portions of material are defibered more and more finely until their discharge through the outlet ports is possible. To facilitate the flow of the outgoing material, aspiration can be provided at the outlet ports.
  • it is necessary to provide adequate soundproofing systems which however have a significant adverse effect on the overall costs of the apparatus.
  • the main object of the present invention is to eliminate the above described disadvantages by providing a machine for the dry defibering of cellulosic material which has a tolerable noise level during its operation and which allows a better use of the power installed.
  • an object of the invention is to provide a machine which achieves a more gradual contact between the hammers and the material to be processed, so as to reduce the vibrations and therefore to extend the life of the bearings of the shaft of the main motor.
  • a machine for the dry defibering of fiberous cellulosic material and the like, particularly for preparing absorbent masses for disposable diapers and the like comprising a containment body defining a substantially cylindrical chamber accommodating a rotor controllable in rotation about its own axis and provided with a plurality of hammers, said containment body being provided with at least one feed port for the introduction into said chamber of the material to be processed in a direction which is substantially radial to said rotor, as well as with outlet ports for the discharge of the processed material, characterized in that said hammers are arranged around said axis of rotation according to a cylindrical helix.
  • the machine according to the invention comprises a containment body 2 which internally defines a chamber 3 which is substantially cylindrical and in which a rotor 4 is accommodated and is substantially composed of a main shaft 5 which is arranged substantially coaxially with the chamber 3 and supports a plurality of hammers 6.
  • the containment body 2 has, along its lateral surface, a feed port 7 through which the material to be defibered in a band 8 is fed into the chamber 3 in a direction which is substantially radial with respect to the rotor 4.
  • a traction assembly 9 of a known kind is mounted, which is substantially composed of a pair of opposite and counter-­rotating rollers 10a and 10b which push the band 8 through the feed port 7.
  • an abutment bar 11 is mounted, on which the band 8 rests and which opposes the action of the hammers 6.
  • the hammers of the rotor are carried by a set of wheels 12 which are rigidly coupled to the main shaft in a longitudinal direction, each of which has a plurality of spokes 13, four in the case illustrated, which extend radially. At the free end of each of these spokes a hammer 6 is fixed in a known manner.
  • the hammers of the rotor 4 are arranged around the axis of the main shaft according to a cylindrical helix.
  • a cylindrical helix with four origins coaxial to the main shaft.
  • the main shaft fitted with a single tab for all the wheels, offsetting every time by a preset angle the seat of the tab on the wheels with respect to a reference position, e.g. the position of the seat of the tab of one of the end wheels.
  • the pitch of the helix substantially matches the length of the set of wheels so as to have an excellent continuity in the contact between hammers and material to be defibered.
  • Each hammer can have two counterposed cutting edges, so as to allow the operation of the machine in both directions of rotation.
  • the rotor can be operated in a known manner, e.g. by means of an electric motor, not illustrated, which is connected by means of belts to a pulley 15 which is associated to an end of the main shaft which is supported proximate to its two ends by two bearings 16 and 17.
  • dentellated regions 18 and 19 are provided on the internal surface of the chamber 3, on which regions the portions of material removed from the band 8 by the hammers are dragged.
  • the containment body 2 has, in a lower region thereof, outlet ports 20 for the discharge of the defibered material. These outlet ports are connected with a transport channel 21 which can be connected with an aspiration device to remove the material from the machine.
  • the band 8 of the material to be defibered is conveyed into the chamber 3 by the rollers 10a and 10b while the rotor is made to rotate around its own axis.
  • the band 8 is struck by the hammers 6 which cause portions of material to detach and which drag these portions continuing the defibering thereof until they emerge from the outlet ports 20.
  • a further advantage is that of achieving a reduction in the vibrations of the main shaft of the rotor and therefore a greater life for the bearings which support it.
  • the materials employed, as well as the dimensions, may be any according to the requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
EP87100633A 1986-07-07 1987-01-19 Dispositif pour le défibrage à sec d'une pâte fibreuse cellulosique, en particulier pour la préparation de masses absorbantes pour couches ou produits similaires Withdrawn EP0252204A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2105186 1986-07-07
IT21051/86A IT1196469B (it) 1986-07-07 1986-07-07 Macchina per la defibrazione a secco di materiale cellulosico fibroso e simili,particolarmente per la preparazione di masse assorbenti per pannolini monouso e simili

Publications (1)

Publication Number Publication Date
EP0252204A1 true EP0252204A1 (fr) 1988-01-13

Family

ID=11175985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100633A Withdrawn EP0252204A1 (fr) 1986-07-07 1987-01-19 Dispositif pour le défibrage à sec d'une pâte fibreuse cellulosique, en particulier pour la préparation de masses absorbantes pour couches ou produits similaires

Country Status (2)

Country Link
EP (1) EP0252204A1 (fr)
IT (1) IT1196469B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1079021A1 (fr) * 1999-08-20 2001-02-28 Ein Kohsan Co., Ltd. Composition de pâte photocatalytique, écume utilisant ladite composition, pâte moulée utilisant ladite composition et écume de pâte moulée utilisant ladite écume ainsi que des procédés pour la fabrication de ladite composition de pâte photocatalytique, de ladite écume, de ladite pâte moulée et de ladite écume moulée et dispositif pour la production de ladite composition
EP1164221A3 (fr) * 2000-06-16 2002-10-16 Ein Kohsan Co., Ltd. Papier laminé photocatalytique
EP1778907A4 (fr) * 2004-08-17 2009-12-16 Livedo Corp Appareil a ecraser la pulpe
US20260185301A1 (en) * 2022-05-17 2026-07-02 Zuiko Corporation Pulverization device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1949534A (en) * 1933-05-08 1934-03-06 Sturtevant Mill Co Method of and apparatus for hydrating cellulose pulp
US3236723A (en) * 1963-05-07 1966-02-22 Improved Machinery Inc Sheet material reprocessing apparatus for paper broke
FR2158824A5 (fr) * 1971-09-22 1973-06-15 Procter & Gamble
US3755856A (en) * 1971-04-23 1973-09-04 Kimberly Clark Co Method and apparatus for the formation of fiber fluff
US4030865A (en) * 1974-07-08 1977-06-21 Tadashi Kobayashi Apparatus for simultaneous defiberization of waste paper stock and uniform dispersion and accumulation of the defiberized fine fiber stock for dry web formation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1949534A (en) * 1933-05-08 1934-03-06 Sturtevant Mill Co Method of and apparatus for hydrating cellulose pulp
US3236723A (en) * 1963-05-07 1966-02-22 Improved Machinery Inc Sheet material reprocessing apparatus for paper broke
US3755856A (en) * 1971-04-23 1973-09-04 Kimberly Clark Co Method and apparatus for the formation of fiber fluff
FR2158824A5 (fr) * 1971-09-22 1973-06-15 Procter & Gamble
US4030865A (en) * 1974-07-08 1977-06-21 Tadashi Kobayashi Apparatus for simultaneous defiberization of waste paper stock and uniform dispersion and accumulation of the defiberized fine fiber stock for dry web formation

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1079021A1 (fr) * 1999-08-20 2001-02-28 Ein Kohsan Co., Ltd. Composition de pâte photocatalytique, écume utilisant ladite composition, pâte moulée utilisant ladite composition et écume de pâte moulée utilisant ladite écume ainsi que des procédés pour la fabrication de ladite composition de pâte photocatalytique, de ladite écume, de ladite pâte moulée et de ladite écume moulée et dispositif pour la production de ladite composition
US6419792B1 (en) 1999-08-20 2002-07-16 Ein Kohsan Co., Ltd. Photocatalytic pulp composition
US7060160B2 (en) 1999-08-20 2006-06-13 Ein Kohsan Co., Ltd. Process for producing a photocatalytic pulp composition and molded photocatalytic pulp
EP1164221A3 (fr) * 2000-06-16 2002-10-16 Ein Kohsan Co., Ltd. Papier laminé photocatalytique
US6673207B1 (en) 2000-06-16 2004-01-06 Ein Kohsan Co., Ltd. Laminated photocatalytic pulp paper and process for making thereof
KR100627437B1 (ko) * 2000-06-16 2006-09-22 아인 코산 가부시키가이샤 적층 광촉매 펄프지 및 그 제조방법, 그 제조방법에이용되는 분리분해장치, 상기 적층 광촉매 펄프지로이루어진 종이끈 및 그 제조방법, 및 상기 종이끈으로이루어진 성형체
CN1318698C (zh) * 2000-06-16 2007-05-30 艾因兴产株式会社 层压光催化纸与生产过程和装置，纸带与生产工艺和制品
EP1778907A4 (fr) * 2004-08-17 2009-12-16 Livedo Corp Appareil a ecraser la pulpe
US20260185301A1 (en) * 2022-05-17 2026-07-02 Zuiko Corporation Pulverization device

Also Published As

Publication number Publication date
IT8621051A0 (it) 1986-07-07
IT1196469B (it) 1988-11-16
IT8621051A1 (it) 1988-01-07

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Inventor name: TRABATTONI, ELIO