• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A web is formed from particulate material, for example wood fibres, by depositing the fibres on a movable deposition surface in a chamber. The particulate material is carried to the surface in an air stream to form a composite material flow which is caused to oscillate across the surface by impulses from separate control means preferably disposed on opposite sides of the stream. The control means is preferably opposed control flows which are caused to vary alternatingly between a minimum and a maximum impulse by use of one or more fluidistors. The fluidistors may be controlled by self-oscillation or by measuring the evenness of the particulate material deposited on the deposition surface. The control may also be effected by adjusting the walls of the chamber to utilize the coanda-effect. The particulate material may be admixed with additives from the control flow and may be charged electrostatically.
    公开号:SU882420A3
    申请号:SU762393347
    申请日:1976-09-07
    公开日:1981-11-15
    发明作者:Густавссон Леннарт
    申请人:Аб Свенска Флектфабрикен (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention is related to the pulp and paper industry, namely the method for producing sheet material by the dry method.
    The technology of producing sheet material is known by feeding the composite stream from the fibrous material and the gaseous medium into the distribution chamber, which is acted upon by gaseous medium flows directed from opposite sides in relation to the composite flow, and the fibrous material is deposited from the composite flow on the moving tape into distribution chamber. A device for implementing this technology comprises means for supplying gaseous medium streams ri.
    The disadvantage of this technology is that it does not provide the necessary uniformity of distribution of the fibrous material and effective adjustment of the sheet thickness along its length.
    The purpose of the invention is to increase the uniform distribution of fibrous material and adjust the thickness of the sheet.
    This goal is achieved by the fact that the gaseous medium flows in a pulsed mode with a frequency of 2-20 cycles per second, with the maximum value of the flow impulse directed on one side corresponding to the minimum value of the flow impulse directed from the opposite side with respect to
    10 composite stream ..
    FIG. 1 and 2 shows a device that implements the method; in fig. 3 and 4 are diagrams of pressure variation in regulator with a molded box.
    The device (Fig. 1) has a distribution chamber 1, a channel for feeding material 2 with a nozzle 3, a roller 7 with a moving belt 4, a vacuum box 5 with a pump 6, regulating
    20 boxes 8 and 9, provided with holes 10 and 11. Regulating boxes 8 and 9 are connected via distribution channels 12 and 13 to control device 14, which, in turn,
    25 is connected to a gas source by a pump 15.
    A composite stream of fibrous material and a gaseous medium is fed through a channel for feeding material 2 into a 30 distribution chamber.
    The fibrous material is deposited on the belt 4, the gaseous medium is removed under the action of vacuum in the box 5, and a layer of fibers 18 is formed on the tape. Near the exit of the composite stream from the nozzle 3, it is exposed to gaseous medium streams 16 and 17, which are opposite to each other. in relation to the composite stream. The control device 14. Creates a variable pulse in the streams 16 and 17 by feeding the gas stream from the pump 15 alternately into the channels 12 and 13.
    Switching takes place at a frequency of 2-20 cycles / s.
    FIG. Figures 3 and 4 show graphs of the magnitude of impulse fluxes in a gaseous medium. FIG. 3 shows an embodiment with a decrease in the magnitude of the flux to zero; FIG. 4 shows an embodiment with a decrease in the magnitude of the impulse fluxes up to a certain minimum value. The flow of gaseous medium in a pulsed mode with the ability to control the frequency of change of the pulse allows one to increase the uniform distribution of the fibrous material and to regulate the thickness of the sheet.
    invention formula
    The method of producing sheet material by feeding the composite stream of fibrous material and gas medium into the distribution chamber, which is affected by gaseous medium flows directed from opposite sides with respect to the composite flow, and deposition of fibrous material from the composite flow onto the moving tape in the distribution chamber , in order to increase the uniform distribution of the fibrous material and adjust the thickness of the sheet, the flow of the gaseous medium is out in pulsed mode frequency of 2-20 cycles per second, and the maximum value of the pulse stream directed on the one hand, it corresponds to the minimum value of the pulse stream, directed from the opposite side with respect to the composite stream.
    Sources of information taken into account in the examination
    1. US Patent No. 3766607, cl. D 01 G 25/00, 1973.
    and,
    t
    : M.
    g; k
    tj -. v "
    权利要求:
    Claims (1)
    [1]
    Claim
    A method of producing a sheet material by feeding a composite stream of fibrous material and a gaseous medium into a distribution chamber, which is influenced by gaseous medium flows directed from opposite sides with respect to the composite stream, and depositing the fibrous material from the composite stream onto a moving tape in the distribution chamber, o It is due to the fact that, in order to increase the uniformity of the distribution of the fibrous material and adjust the thickness of the sheet, the gaseous medium flows into them pulse mode with a frequency of 2-20 cycles per second, and the maximum value of the pulse of the stream directed from one side corresponds to the minimum value of the pulse of the stream directed from the opposite side with respect to the composite stream.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU882420A3|1981-11-15|Method of producing sheet material
    KR930019155A|1993-10-18|Method for applying treatment material to the surface of adhesive machine and apparatus therefor
    US4240180A|1980-12-23|Fiber feeding apparatus for carding machines and the like
    JPS6054407B2|1985-11-29|
    UA50777C2|2002-11-15|Method and apparatus for applying a material to a web
    SE7702187L|1977-09-03|PROCEDURE FOR THICKNESS CONTROL OF A PAPER PATH AND APPARATUS FOR PERFORMING THE PROCEDURE
    US2951007A|1960-08-30|Method and device for regulating the moisture content of endless moving webs of fibrous material
    GB1059206A|1967-02-15|Improvements in or relating to air knives
    US5045342A|1991-09-03|Independent heat moisture control system for gloss optimization
    US3002700A|1961-10-03|Nozzle on heat-treatment machines for textile fabrics and the like
    US5361451A|1994-11-08|Apparatus for making a nonwoven web
    US4501953A|1985-02-26|Method of and apparatus for controlling apparatus for perforating strips of paper or the like by disruptive spark discharges
    US4353686A|1982-10-12|Apparatus for air-layer fibrous webs
    US4075739A|1978-02-28|Method and apparatus for controlling a card
    RU2186512C2|2002-08-10|Method and apparatus for adding smoke modifying agents into smoking material core
    PL199485B1|2008-09-30|Method of and apparatus for dispensing an additive, in particular that in liquid state, ono a moving web of primary material
    CA2457923A1|2003-02-27|High speed former head
    US6167593B1|2001-01-02|Apparatus for varying the depth of a chute in a fiber feeder
    US4041770A|1977-08-16|Method and apparatus for sensing the thickness of a fiber layer on a moving surface
    GB1141698A|1969-01-29|Improvements in or relating to an apparatus for producing a continuous strand of loose fibrous particles
    SE8502260D0|1985-05-08|KIT AND APPARATUS FOR PREPARING A MATERIAL COAT
    US4197267A|1980-04-08|Method for forming a web of material
    US4761858A|1988-08-09|Procedure and apparatus for controlling the surface mass distribution of paper web
    PL194515B1|2007-06-29|Transport apparatus for a web of casing material pulled off out of a bobbin for use in tobacco industry
    SU882418A3|1981-11-15|Device for forming material web
    同族专利:
    公开号 | 公开日
    AU501938B2|1979-07-05|
    NO156041C|1987-07-15|
    NO156041B|1987-04-06|
    JPS5240675A|1977-03-29|
    CA1049215A|1979-02-27|
    FI58370C|1981-01-12|
    AU1805376A|1978-04-13|
    NO763293L|1977-03-29|
    FR2325500A1|1977-04-22|
    NZ182150A|1979-06-19|
    FR2325500B1|1981-09-18|
    DE2635919C3|1980-07-17|
    RO74098A|1982-07-06|
    JPS6051569B2|1985-11-14|
    DD126196A5|1977-06-29|
    DE2635919A1|1977-03-31|
    SE7510795L|1977-03-27|
    SE397943B|1977-11-28|
    US4269578A|1981-05-26|
    FI58370B|1980-09-30|
    US4099296A|1978-07-11|
    FI762312A|1977-03-27|
    PL105819B1|1979-11-30|
    DE2635919B2|1979-11-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2315735A|1940-05-15|1943-04-06|Nat Gypsum Co|Method of and apparatus for blowing mineral wool|
    DE889508C|1951-08-17|1953-09-10|Spinnfaser Ag|Process for preparing pulp flakes for post-treatment|
    NL207062A|1955-05-25|1900-01-01|
    US2920679A|1956-01-16|1960-01-12|Walsco Company|Method and apparatus for producing fibrous structures|
    BE557512A|1956-05-15|
    US3408697A|1965-09-21|1968-11-05|Koppers Co Inc|Apparatus for forming a fiber mat|
    US3485428A|1967-01-27|1969-12-23|Monsanto Co|Method and apparatus for pneumatically depositing a web|
    US3477103A|1967-07-07|1969-11-11|Du Pont|Preparation of nonwoven web structure|
    GB1264962A|1968-06-25|1972-02-23|
    US3599848A|1970-05-14|1971-08-17|Owens Corning Fiberglass Corp|Method and means for strand distribution|
    US3777231A|1972-09-27|1973-12-04|A Guschin|A device for forming a layer of fibrous material of homogeneous structure|US4197267A|1975-09-26|1980-04-08|Aktiebolaget Svenska Flaktfabriken|Method for forming a web of material|
    SE403586B|1977-03-25|1978-08-28|Svenska Flaektfabriken Ab|KIT AND DEVICE FOR TREATMENT OF A FIBROST OR PARTICULATED MATERIAL, WHICH TREATMENT INCLUDES ONE OR SEVERAL OF THE STEPS DRYING, COOLING, MOISTURIZING|
    SE403585B|1977-03-25|1978-08-28|Svenska Flaektfabriken Ab|METHODS AND DEVICES FOR FORMING A MATERIAL PATH BY DEPOSITING IN A DISTRIBUTION CHAMBER INTRODUCING IN GASY MEDIUM DISTRIBUTED STREAM OF PARTICLES, EXV FIBERS, ON A DISTRIBUTION CHAMBER ARRANGED|
    DE2735510C3|1977-08-06|1980-05-08|Kuesters, Eduard, 4150 Krefeld|Method and device for sifting and forming panels, in particular in the course of the production of wooden panels|
    US4285452A|1979-02-26|1981-08-25|Crown Zellerbach Corporation|System and method for dispersing filaments|
    US4648920A|1981-05-19|1987-03-10|Henry Sperber|Process for manufacturing batt-type insulation from loose fibrous particles|
    US4432714A|1982-08-16|1984-02-21|Armstrong World Industries, Inc.|Apparatus for forming building materials comprising non-woven webs|
    US4489462A|1983-03-17|1984-12-25|E. I. Du Pont De Nemours And Company|Air flow control apparatus for a fiber air-lay machine|
    SE447807B|1985-05-08|1986-12-15|Kmw Ab|KIT AND APPARATUS FOR PREPARING A MATERIAL COAT|
    SE447808B|1985-05-08|1986-12-15|Kmw Ab|KIT AND APPARATUS FOR PREPARING A MATERIAL COAT|
    SE457729B|1985-12-04|1989-01-23|Flaekt Ab|SET AND DEVICE FOR DRY FORMATION OF A FIBER COVER|
    JPS63122371U|1987-01-31|1988-08-09|
    EP1299588B1|2000-05-31|2004-03-10|M & J Fibretech A/S|Plant and method for dryly producing a non-woven fibre web of short and long fibres, a cotton fibre web containing cotton linters pulp |
    EP1277867A1|2001-07-16|2003-01-22|Carl Freudenberg KG|Method and apparatus for the manufacture of spunbond webs|
    US7886411B2|2007-07-06|2011-02-15|Jezzi Arrigo D|Apparatus for the uniform distribution of fibers in an air stream|
    US8122570B2|2007-07-06|2012-02-28|Jezzi Arrigo D|Apparatus and method for dry forming a uniform non-woven fibrous web|
    WO2009025636A1|2007-08-17|2009-02-26|A.D.Jezzi & Associates, Llc|Apparatus for the uniform distribution of fibers in an air stream|
    JP2013161924A|2012-02-03|2013-08-19|Tokyo Electron Ltd|Purge device and purge method of substrate storage container|
    GB2539668A|2015-06-23|2016-12-28|Concepts For Success |Method for applying particles to a moving web and apparatus therefor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7510795A|SE397943B|1975-09-26|1975-09-26|METHODS AND DEVICES FOR FORMING A MATERIAL PATH BY DEPOSITING IN A DISTRIBUTION CHAMBER INTRODUCING INTO GASY MEDIUM DISTRIBUTED STREAM OF PARTICLES, FOR EXAMPLE FIBERS, ON A DISTRIBUTION CHAMBER ...|
    [返回顶部]