EP0273093B1 - Verfahren und Vorrichtung zur Herstellung von dehnungsstabilen, flüssigkeitsundurchlässigen, biegsamen Pressbändern, insbesondere für Nasspressen von Papiermaschinen - Google Patents

Verfahren und Vorrichtung zur Herstellung von dehnungsstabilen, flüssigkeitsundurchlässigen, biegsamen Pressbändern, insbesondere für Nasspressen von Papiermaschinen Download PDF

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Publication number
EP0273093B1
EP0273093B1 EP87104607A EP87104607A EP0273093B1 EP 0273093 B1 EP0273093 B1 EP 0273093B1 EP 87104607 A EP87104607 A EP 87104607A EP 87104607 A EP87104607 A EP 87104607A EP 0273093 B1 EP0273093 B1 EP 0273093B1
Authority
EP
European Patent Office
Prior art keywords
wall
centrifugal tube
depressions
cavities
band
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.)
Expired - Lifetime
Application number
EP87104607A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0273093A1 (de
Inventor
Bernhard Dr. Krenkel
Heinz Joos
Karl Maria Dr. Fitzka
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.)
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Original Assignee
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
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 F Oberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Priority to AT87104607T priority Critical patent/ATE58190T1/de
Publication of EP0273093A1 publication Critical patent/EP0273093A1/de
Application granted granted Critical
Publication of EP0273093B1 publication Critical patent/EP0273093B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D21F3/0236—Belts or sleeves therefor manufacturing methods

Definitions

  • the invention relates to a method and a device for producing stretch-stable, liquid-impermeable, flexible, in particular for elastic press belts suitable for wet presses of paper machines provided with an extended press nip, the hollow spaces suitable for liquid removal on their outside facing the fibrous web or the felt cloth or cloths and / or have depressions, an essentially bubble-free, free-flowing mixture of a prepolymer being poured onto a reinforcing strip lying against the inner wall of a rotating centrifugal tube and thereby being connected to it in a form-fitting manner.
  • Press belts which are produced using the above-mentioned method and the associated device are known from EP-A 0 098 502. They are usually coated with a plastic by pouring, the reinforcement being partially embedded in the plastic.
  • the flowable mixture of a prepolymer is poured onto the reinforcement band, which is stretched onto a horizontal cylinder rotating about its longitudinal axis, in a pouring jet slowly moving parallel to the cylinder axis or into a vertical or inclined mold introduced, in which the reinforcement tape in the form of a single or multi-layer fabric made of threads of one or more materials such as polyamide, polyester, Kevlar, metal and the like. or mixtures thereof.
  • the object of the invention is therefore to design the method of the type mentioned in such a way that so-called wide-nip press belts which have cavities and / or depressions for liquid removal on the felt-facing side can be produced considerably more easily.
  • a device is to be developed which, starting from a cylindrical centrifugal tube which can be rotated about its longitudinal axis and a device for substantially bubble-free pouring of a liquid mixture of a prepolymer onto the inner wall of the centrifugal tube, is designed in such a way that it is economically advantageous and thus enables cost-effective implementation of the method.
  • the inner wall of the centrifugal tube is provided with cavities and / or depressions which are filled by the flowable mixture when it is poured on and form raised surface parts on the outside of the finished press belt, between which the liquid to be removed during the later pressing process can flow away, and that the cast casting tape is ground on its inside to the finished size.
  • a device which is characterized in that the inner wall of the cylindrical centrifugal tube is provided with cavities and / or depressions, and in that the flowable mixture is applied onto the inner wall of the centrifugal tube with the aid of a pouring head which is movably arranged in the centrifugal tube can be poured on, which is fastened to a traverse which can be retracted and extended in the centrifugal tube and can be exchanged for a grinding device for grinding the inside of the cast press belt.
  • the turning of the finished cast press belt is omitted, because in the press belt coating inside a rotating centrifugal tube, the cavities and depressions desired on the press belt outside, such as grooves, bores or the like, which are provided as a negative form on the inside of the cylinder, in the outside of the press belt is poured in after the reinforcement band, for example a fabric band, has been inserted into the cylindrical centrifugal tube and this has been set in rapid rotation, so that the flowable mixture of a prepolymer, for example polyurethane, is poured into the centrifugal tube rotating about the longitudinal axis , penetrates the reinforcement tape under the effect of centrifugal force and fills the cavities or depressions on the inner tube wall with the polyurethane.
  • the reinforcement band for example a fabric band
  • the inner wall of the centrifugal tube can be provided with cavities and / or depressions in that a profiled film is placed on its surface, which contains these cavities and / or depressions and is fastened to the inner wall of the centrifugal tube, the placement also in sections, in side-by-side profile film parts, until the desired press tape dimension is reached and the profile film can be fastened in the region of the centrifugal tube ends with tensioning and / or limiting rings on the inner wall.
  • the profile film is treated with a release agent, in particular silicone oil, before the casting process, and to cause the Back of the profile film adheres to the inner wall of the conveyor tube, the profile film can be treated with an adhesion promoter before the casting process.
  • a release agent in particular silicone oil
  • the profile film could also remain on the finished cast press belt, if this is desired. In this case, it may previously treated with an adhesion promoter.
  • the inner wall can be covered with a fabric provided with a release agent or at least one spiral, which are removed again after the casting and spinning process and the negative of which remains on the outside of the press belt as the desired water-removing structure by creating cavities and / or depressions.
  • the flowable mixture of the prepolymer is expediently applied in one operation, but can also be carried out in several operations, for example in cases where different layers and / or degrees of hardness of the prepolymer are to be achieved.
  • the reinforcing tape which rests on the inner wall of the rotating centrifugal tube and serves in particular to increase the dimensional stability of the press belt to be created, is generally placed directly on the highest elevations of the inner wall or the profile film of the centrifugal tube lying on the inner wall. However, it has also proven useful to place spacer strips between the reinforcement tape and the inner wall or the profile film lying on the inner wall.
  • the device for carrying out the method can be modified in order to achieve advantageous adaptations of the production process to the particular circumstances, as the centrifugal tube can also be composed of several parts, which facilitates the removal of the cast casting tape from the tube.
  • the cavities and / or depressions on the inner wall of the centrifugal tube are not part of the wall itself, they can be formed in lining pieces which are arranged in the centrifugal tube and fastened to the inner wall. It has proven useful to assemble the chucks from longitudinal and / or cross-divided segments that are easier to install and remove than one-piece chucks.
  • an expansion-stable, liquid-impermeable, elastic press belt which is particularly suitable for wet presses of paper machines provided with an extended press nip and on its outside facing the fibrous web or the felt cloth or cloths for liquid removal has suitable cavities and / or depressions, and consists of an essentially bubble-free, flowable mixture of a prepolymer, the depressions and / or cavities having configurations which in the negative correspond to configurations of depressions and / or cavities on the inner wall of the centrifugal tube, which either Are part of the inner wall itself or of lining pieces attached to the inner wall or of profiled foils or fabrics or spirals placed on the inner wall.
  • the device shown in FIG. 1 for producing stretch-stable, liquid-impermeable, flexible, elastic press belts, in particular for wet presses of paper machines provided with an extended press nip has a centrifugal tube 1 which is mounted horizontally on a foundation 5 and which is driven by a motor 9 Sprocket gear 10 on which a pipe end is rotated.
  • the outer diameter of the centrifugal tube in this exemplary embodiment is 1,000 mm, the centrifugal tube length is 10,000 mm, and during centrifuging the maximum speed is 600 rpm.
  • the centrifugal tube 1 is supported on bearing devices 6 and 7, which are arranged at the points of minimal deflection.
  • chuck pieces 8 are successively attached in the direction of the tube axis, which, as shown in FIG. 9, abut one another and, as shown in FIG. 10, can also consist of longitudinally and / or cross-divided chuck segments and on them inner surface are provided with cavities and / or depressions, not shown, which are filled by a substantially bubble-free, flowable mixture of a prepolymer from this and on the outside of the finished press belt, which is produced in this centrifugal tube, form raised surface parts, between which the liquid to be removed during the later pressing process can flow off.
  • the chucks 8 not only facilitate the removal of the finished press belt, but also increase the economy of the manufacturing process by avoiding the fact that the inner wall 2 itself of the centrifugal tube 1 must be provided with the appropriate cavities and / or depressions, as shown in FIG. 6 at 12 is shown where the depressions consist of parallel grooves 18, which would have the consequence that if the desired surface configuration of the press belt were changed, the entire centrifugal tube would have to be replaced.
  • a pouring head 4 For pouring the flowable mixture onto the inner wall 2 of the centrifugal tube or the inner wall of the chuck pieces 8 inserted into this tube, a pouring head 4 is used, which is attached to the front end of a traverse 3 which can be extended and retracted into the centrifugal tube and which is also on the foundation 5 2, and can be moved in the longitudinal direction of the centrifugal tube with the aid of a spindle drive 11.
  • the casting head 4 is connected to supply lines 20, 21 for the two elastomer components which, by mixing in a suitable mixing device 13, form the prepolymer from which the press belt to be produced is to be made.
  • the traverse 3 is moved forward evenly inside the centrifugal tube 1 by a feed device 22, which also includes the spindle 11.
  • the centrifugal tube itself can be divided, expediently by a longitudinal division parallel to the main axis of the centrifugal tube.
  • the press belt created which is still in the centrifugal tube, is ground to its finished size on the inside.
  • the casting head 4 is exchanged for a grinding device 5 which is inserted into the front end of the cross member 3, as can be seen in FIG. 3.
  • compressed air nozzles 24 are arranged in the wall of the centrifugal tube, which are connected to hose connections 25 for this purpose and when the centrifugal tube is at a standstill, so that compressed air between the inner wall of the centrifugal tube 2 and cast press belt is blowable, which detaches the press belt from the inner wall and thereby facilitates the removal of the press belt from the centrifugal tube.
  • a profiled film 14 can be placed on the surface of the inner wall 2 of the centrifugal tube, as shown in FIGS. 5 and 11 is shown, which is produced, for example, as an extrusion film and cut off according to the inner circumference of the centrifugal tube 1 and is placed next to one another until the desired press belt dimension is reached in the centrifugal tube.
  • This profile film is advantageously fastened to the inner wall of the centrifugal tube 1 in the region of the centrifugal tube ends 15, 16 with the aid of tensioning or limiting rings 26, as can be seen from FIGS. 5 and 7.
  • This profile film 14 is provided on its inside facing the centrifugal drum with the desired profiling, for example grooves 27 or grooves 18 running in the circumferential direction of the centrifugal tube or grooves and / or grooves running inclined to the longitudinal axis of the pipe, at least some grooves or grooves also being able to cross.
  • the profile film can also be provided with profiles on its surface, which later represents the final outer layer.
  • the back is the profile expediently treat the film with a suitable adhesion promoter before the casting process.
  • grooves or grooves can also be used for structuring the outside of the press belt for the purpose of transporting off the press water, which blind holes are produced by the fact that on the inner wall 2 of the centrifugal tube 1, as can be seen from FIG. 8, or on the inner wall of the inserted in the centrifugal tube Lining pieces 8 a plurality of bolts 19 is attached, which correspond to the dimensions of the desired blind holes.
  • Such bolts or pins can also be part of a profile film to be inserted into the centrifugal tube, which, as in the cases already described above, is expediently treated before the casting process with a release agent, in particular silicone oil, which after the casting or centrifuging detaches the press belt relieved by the profile film.
  • a fabric 17 provided with a release agent can also be arranged on the inner wall 2 of the centrifugal tube 1 instead of a profile film, as shown in FIG 12 is shown that after the finished cast press belt has been removed from its upper surface. surface is removed again, or it can be arranged one or more spirals 18 on the inner wall, as shown in Fig. 13, which, provided with a release agent, can also be removed later from the surface of the press belt.
  • a reinforcement tape or reinforcement fabric is placed in the centrifuge tube, which, when the centrifugal tube rotates, lies smoothly on the prepared profile surfaces before the pouring process, be it that these profiles are a direct component the inner wall of the centrifugal tube or are part of lining pieces or of profiled films 14, fabrics 17 or spirals 18 are formed.
  • These reinforcing tapes or fabrics are placed directly on the highest elevations of the inner wall or the profiles of the centrifugal tube lying on the inner wall and thus become an integral part of the press belt after its completion.
  • spacer strips can also be placed between the reinforcement tape or fabric and the inner wall of the centrifugal tube or the profile film lying on the inner wall, which have the effect that the reinforcement is not visible on the surface of the finished press belt, but rather completely in the cast prepolymer is embedded.
  • the profile foils can consist of an elastomer, but can also be made of metal, by extrusion, rolling or stamping. They are inserted as one piece or in sections in the circumferential direction or along the main axis of the centrifugal tube in the latter.
  • stretch-stable, liquid-impermeable elastic press belts in particular for wet presses provided with an extended press nip, can be produced by paper machines, which can also have relatively small belt diameters, because it is no longer necessary to turn the cast press belt, since this is produced in the manner described above
  • Press belt on its outside facing the fibrous web or the felt cloth or cloths has the structure suitable for liquid removal in the form of cavities and / or depressions.
  • FIG. 14 shows an application example for a press belt 31 produced in accordance with the invention in a wide nip press 33 which, on the side facing the felt 30, has cavities (not shown) for removing the fibrous web 29 formed by the two rollers 34 and 35 during passage through the press nip 32 and serves water taken up by the felt 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Centrifugal Separators (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP87104607A 1986-12-03 1987-03-27 Verfahren und Vorrichtung zur Herstellung von dehnungsstabilen, flüssigkeitsundurchlässigen, biegsamen Pressbändern, insbesondere für Nasspressen von Papiermaschinen Expired - Lifetime EP0273093B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104607T ATE58190T1 (de) 1986-12-03 1987-03-27 Verfahren und vorrichtung zur herstellung von dehnungsstabilen, fluessigkeitsundurchlaessigen, biegsamen pressbaendern, insbesondere fuer nasspressen von papiermaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863641191 DE3641191A1 (de) 1986-12-03 1986-12-03 Verfahren und vorrichtung zur herstellung von dehnungsstabilen, fluessigkeitsundurchlaessigen, biegsamen pressbaendern, insbesondere fuer nasspressen von papiermaschinen
DE3641191 1986-12-03

Publications (2)

Publication Number Publication Date
EP0273093A1 EP0273093A1 (de) 1988-07-06
EP0273093B1 true EP0273093B1 (de) 1990-11-07

Family

ID=6315306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104607A Expired - Lifetime EP0273093B1 (de) 1986-12-03 1987-03-27 Verfahren und Vorrichtung zur Herstellung von dehnungsstabilen, flüssigkeitsundurchlässigen, biegsamen Pressbändern, insbesondere für Nasspressen von Papiermaschinen

Country Status (8)

Country Link
US (1) US4889674A (enrdf_load_stackoverflow)
EP (1) EP0273093B1 (enrdf_load_stackoverflow)
JP (1) JPS63295216A (enrdf_load_stackoverflow)
AT (1) ATE58190T1 (enrdf_load_stackoverflow)
CA (1) CA1315063C (enrdf_load_stackoverflow)
DE (2) DE3641191A1 (enrdf_load_stackoverflow)
ES (1) ES2019318B3 (enrdf_load_stackoverflow)
FI (1) FI91948C (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4016902A1 (de) * 1990-05-25 1991-11-28 Balatros Gmbh Verfahren und vorrichtung zum herstellen eines endlosen, flachen und flexiblen bandes aus giessbarem kunststoff
DE4020589A1 (de) * 1990-06-28 1992-01-09 Oberdorfer Fa F Beschichtetes, flexibles, undurchlaessiges pressband fuer den einsatz in breit-nip-pressen
US5525194A (en) * 1994-04-22 1996-06-11 Tamfelt Corp. Extended nip press belt
US5536352A (en) * 1994-11-14 1996-07-16 Eastman Kodak Company Methods of making centrifugally cast parts
US5677022A (en) * 1994-11-14 1997-10-14 Eastman Kodak Company Electrostatographic roller mask
DE19860099A1 (de) 1998-12-23 2000-07-06 Voith Sulzer Papiertech Patent Preßmantel und Verfahren zur Herstellung
DE19962708A1 (de) * 1999-12-23 2001-06-28 Voith Paper Patent Gmbh Pressenanordnung
US6752908B2 (en) 2001-06-01 2004-06-22 Stowe Woodward, Llc Shoe press belt with system for detecting operational parameters
US7014733B2 (en) * 2002-05-14 2006-03-21 Stowe Woodward L.L.C. Belt for shoe press and shoe calender and method for forming same
US20040234716A1 (en) * 2003-05-21 2004-11-25 Madden Michael D. Method for forming endless belt
CN103938480B (zh) * 2014-04-28 2016-02-03 杭州顺隆胶辊有限公司 一种造纸靴套的成型方法

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US2507347A (en) * 1947-12-26 1950-05-09 Jr Robert R Myers Method of producing arcular printing plates
US2940125A (en) * 1956-09-17 1960-06-14 Raybestos Manhattan Inc Method of producing designs on heattreated articles
US3150219A (en) * 1959-08-25 1964-09-22 Schmidt William Karl Process of making plastic pipes
US3162568A (en) * 1961-03-23 1964-12-22 James E Post Press units for moisture removal
CH427223A (de) * 1965-08-31 1966-12-31 Basler Stueckfaerberei Ag Verfahren und Einrichtung zum Herstellen von rohfaserverstärkten Rohren aus härtbarem Kunststoff
US3439077A (en) * 1966-06-09 1969-04-15 Emsig Mfg Corp Process for making plastic articles having decorative surface effects
US3529054A (en) * 1967-11-15 1970-09-15 Burroughs Corp Method for fabricating printing drums
US3803281A (en) * 1968-04-22 1974-04-09 Goodyear Tire & Rubber Method of preparing polyurethane belts
SU368047A1 (ru) * 1969-09-05 1973-01-26 Авторы изобретени витель Форма для изготовления армированных изделий
US3864182A (en) * 1973-07-18 1975-02-04 Plas Steel Products Inc Method of making a reinforced plastic apertured tube
GB1504439A (en) * 1974-05-28 1978-03-22 Dunlop Ltd Tyre manufacture
US4049767A (en) * 1974-10-04 1977-09-20 Vaidya Deepak V Rotational molding process for forming a closed hollow toroidal article
US3997645A (en) * 1974-10-08 1976-12-14 Canathane Roller Corporation Method of rotational molding a rectangular mat
US3956448A (en) * 1974-10-21 1976-05-11 The Goodyear Tire & Rubber Company Method of centrifugally casting a tire
US4055620A (en) * 1976-09-07 1977-10-25 Conrad Jack R Flexible mold and process
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US4511521A (en) * 1982-04-12 1985-04-16 Dayco Corporation Endless power transmission belt construction and method and apparatus for making the same
GB2138349B (en) * 1983-04-22 1987-06-03 Metal Box Plc Dimensionally stable thermoplastic tubular articles
DE3224760A1 (de) * 1982-07-02 1984-01-05 Thomas Josef Heimbach GmbH & Co, 5160 Düren Band zum einsatz in nasspressen von papiermaschinen
US4478769A (en) * 1982-09-30 1984-10-23 Amerace Corporation Method for forming an embossing tool with an optically precise pattern
JPS5954598U (ja) * 1982-10-01 1984-04-10 市川毛織株式会社 抄紙機の広巾ニツププレス用加圧ベルト
DE3318984A1 (de) * 1983-05-25 1984-11-29 Fa. F. Oberdorfer, 7920 Heidenheim Herstellungsverfahren fuer zugfeste, undurchlaessige, biegsame baender insbesondere fuer pressen zum entwaessern von faserstoffbahnen

Also Published As

Publication number Publication date
JPH0413127B2 (enrdf_load_stackoverflow) 1992-03-06
FI91948B (fi) 1994-05-31
DE3766084D1 (de) 1990-12-13
ATE58190T1 (de) 1990-11-15
FI91948C (fi) 1994-09-12
DE3641191A1 (de) 1988-06-09
EP0273093A1 (de) 1988-07-06
JPS63295216A (ja) 1988-12-01
CA1315063C (en) 1993-03-30
FI874328A0 (fi) 1987-10-02
FI874328A7 (fi) 1988-06-04
US4889674A (en) 1989-12-26
ES2019318B3 (es) 1991-06-16

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