EP0664843A1 - A method of manufacturing a cover for a press roll. - Google Patents

A method of manufacturing a cover for a press roll.

Info

Publication number
EP0664843A1
EP0664843A1 EP93921473A EP93921473A EP0664843A1 EP 0664843 A1 EP0664843 A1 EP 0664843A1 EP 93921473 A EP93921473 A EP 93921473A EP 93921473 A EP93921473 A EP 93921473A EP 0664843 A1 EP0664843 A1 EP 0664843A1
Authority
EP
European Patent Office
Prior art keywords
matrix
cover
manufacturing
set forth
filler
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.)
Granted
Application number
EP93921473A
Other languages
German (de)
French (fr)
Other versions
EP0664843B1 (en
Inventor
James Bonander
Eugene L Slagowski
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.)
Beloit Technologies Inc
Original Assignee
Beloit Technologies Inc
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 Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of EP0664843A1 publication Critical patent/EP0664843A1/en
Application granted granted Critical
Publication of EP0664843B1 publication Critical patent/EP0664843B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • D21F3/08—Pressure rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/005—Roll constructions
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings

Definitions

  • PATENT APPLICATION TITLE A METHOD OF MANUFACTURING A COVER FOR A PRESS ROLL
  • the present invention relates to a method of manufacturing a cover for a press roll. More specifically, the present invention relates to a method of manufacturing a cover for a press roll which includes spirally winding reinforcing material around the press roll.
  • a formed web is guided through a press section for removing water from the web.
  • Steel press rolls have been covered with rubber or synthetic material in order to enhance the water removing capability of the press.
  • fillers have been added to urethane in order to increase the hardness of the cover.
  • the present invention overcomes the problem of adding filler to the spirally wound reinforcing material by applying the filler to an epoxy matrix prior to the application of the mixture to the reinforcing material.
  • the present invention provides a method of manufacturing a cover for a press roll that overcomes the aforementioned inadequacies of the prior art arrangements and which makes a considerable contribution to the art of manufacturing a cover for a press roll.
  • the present invention relates to a method of manufacturing a cover for a press roll.
  • the method includes the steps of feeding an epoxy matrix into a container and agitating the matrix. Filler material is added to the matrix while the matrix is being agitated, and the matrix and filler are then conveyed to an application zone. Reinforcing material is unwound from a roll such that the material extends past the application zone. The agitated matrix and filler are applied to the unwound material during passage of the material past the application zone. The reinforcing material, together with the matrix and filler, are then spirally wound around the press roll such that the press roll is covered with the reinforcing material impregnated with the matrix and filler. The arrangement is such that the surface characteristics of the resultant cover are dependent on the amount and type of filler material added to the matrix.
  • the epoxy matrix is a polymeric thermo-plastic matrix.
  • the matrix is a polymeric thermo-set matrix.
  • the filler material is composed of either mineral particles, synthetic particles or refractory particles.
  • the particles in one embodiment of the invention have a diameter less than one (1 ) millimeter, and in another embodiment of the present invention, the particles have a diameter of at least one (1 ) millimeter.
  • the filler material includes PTFE powder, together with glass fibers. In yet another embodiment of the present invention, the filler material includes PTFE powder, together with ceramic fibers.
  • the filler material includes PTFE powder, together with quartz fibers and feldspar particles.
  • the reinforcing material is either a woven material, a knitted material, a braided material or a non-woven material.
  • Figure 1 is a schematic view representing the step of feeding the epoxy matrix into a container and agitating the same;
  • Figure 2 is a similar view to that shown in Figure 1 , but shows filler material being added to the matrix while the matrix is being agitated;
  • Figure 3 is a similar view to that shown in Figure 2, but shows the agitated matrix and filler being conveyed to an application zone and being applied to reinforcing material being unwound from a roll of reinforcing material;
  • Figure 4 is a perspective view showing a press roll being spirally wound with the reinforcing material and matrix and filler according to the present invention.
  • Figure 1 is a schematic view illustrating a method of manufacturing a cover for a press roll shell according to the present invention.
  • Figure 1 shows an epoxy matrix 10 disposed within a container 12. The epoxy matrix 10 is being agitated by an agitator 14.
  • Figure 2 is a similar view to that shown in Figure 1 , but shows filler material 16 being added to the matrix 10 while the matrix 10 is being agitated within the container 12.
  • Figure 3 is a similar view to that shown in Figure 2, but shows the agitated matrix 10 and filler 16 being conveyed and pumped via pump P to an application zone, generally designated 18.
  • a roll 20 of reinforcing material 22 is unwound, as indicated by the arrow 26, such that the reinforcing material 22 extends past the application zone 18.
  • the agitated matrix and filler 10 and 16 are applied, as indicated by the arrow 26, to the unwound material 22 during passage of the unwound material 22 past the application zone 18.
  • Figure 4 is a perspective view of a press roll 28 and shows the roll 28 being spirally wound with the reinforcing material 22, the matrix 10 and filler 16 having been previously applied to the reinforcing material 22.
  • the arrangement is such that the press roll 28 is covered with the reinforcing material 22, which is impregnated with the matrix 10 and filler 16.
  • the surface characteristics of the resultant cover are consequently dependent on the amount and type of filler material 16 added to the matrix.
  • the matrix 10 is either a polymeric thermo-plastic matrix or a polymeric thermo-set matrix.
  • the filler material 16 is either composed of mineral particles, synthetic particles or refractory particles.
  • the filler material 16 includes particles having a diameter of less than one (1 ) millimeter, and in another embodiment of the present invention, the filler material 16 includes particles having a diameter of at least one (1 ) millimeter.
  • the filler material 16 includes either PTFE powder together with glass fibers, PTFE powder together with ceramic fibers, or PTFE powder together with quartz fibers and feldspar particles.
  • the reinforcing material 22 is either a woven material, a knitted material, a braided material or a non-woven material.
  • the step of spirally winding the reinforcing material 22 is carried out during the cross-linking of the matrix.
  • the present invention provides a method of manufacturing a roll cover which exhibits the required durometer hardness for the particular type of paper being pressed.
  • Such hardness of the cover is not only a requirement according to the type of paper being manufactured, but also a requirement according to the type of coating that will be applied thereto for subsequent calendering.
  • roll covers of varying durometer hardness will be required dependent upon the type of furnish being used. Although the present invention has been described with particular application to the provision of a cover for a press roll, it will be appreciated by those skilled in the art that such roll covers will also be applicable in soft calendering and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Reinforced Plastic Materials (AREA)
  • Paper (AREA)

Abstract

A method of manufacturing a cover for a press roll includes the steps of feeding epoxy matrix (10) into a container (12) and agitating the same. Filler material (16) is added to the matrix (10) while the matrix is being agitated. The matrix (10) and filler (16) are conveyed to an application zone (18). A roll (20) of reinforcing material (22) is unwound such that the unwound reinforcing material (22) extends past the application zone (18). The agitated matrix (10) and filler (16) is applied to the unwound material (22) during passage of the material past the application zone (18). The reinforcing material (22) with the matrix (10) and filler (16) applied thereto are then spirally wound around the press roll (28) such that the press roll (28) is covered with the reinforcing material (22) impregnated with the matrix (10) and filler (16). The arrangement is such that the surface characteristics of the resultant cover are dependent on the amount and type of filler material added to the matrix (10).

Description

PATENT APPLICATION TITLE: A METHOD OF MANUFACTURING A COVER FOR A PRESS ROLL
Background of the Invention Field of the Invention v
The present invention relates to a method of manufacturing a cover for a press roll. More specifically, the present invention relates to a method of manufacturing a cover for a press roll which includes spirally winding reinforcing material around the press roll.
Information Disclosure Statement
In the papermaking art, a formed web is guided through a press section for removing water from the web.
Steel press rolls have been covered with rubber or synthetic material in order to enhance the water removing capability of the press.
Often, it has been the practice to add filler particles to the rubber compounds prior to application of the rubber compound to the steel roll shell in order to change the hardness of the resultant cover.
Additionally, fillers have been added to urethane in order to increase the hardness of the cover.
However, more recently, it has been found advantageous to impregnate reinforcing material with a urethane material and to spirally wind the same onto a roll shell. However, such spiral winding of the reinforcing material does not readily permit the addition thereto of the aforementioned filler particles.
The present invention overcomes the problem of adding filler to the spirally wound reinforcing material by applying the filler to an epoxy matrix prior to the application of the mixture to the reinforcing material.
Therefore, the present invention provides a method of manufacturing a cover for a press roll that overcomes the aforementioned inadequacies of the prior art arrangements and which makes a considerable contribution to the art of manufacturing a cover for a press roll.
Other objects and advantages of the present invention will be readily apparent to those skilled in the art by a consideration of the detailed description contained hereinafter, taken in conjunction with the annexed drawings.
Summary of the Invention
The present invention relates to a method of manufacturing a cover for a press roll. The method includes the steps of feeding an epoxy matrix into a container and agitating the matrix. Filler material is added to the matrix while the matrix is being agitated, and the matrix and filler are then conveyed to an application zone. Reinforcing material is unwound from a roll such that the material extends past the application zone. The agitated matrix and filler are applied to the unwound material during passage of the material past the application zone. The reinforcing material, together with the matrix and filler, are then spirally wound around the press roll such that the press roll is covered with the reinforcing material impregnated with the matrix and filler. The arrangement is such that the surface characteristics of the resultant cover are dependent on the amount and type of filler material added to the matrix.
In a more specific embodiment of the present invention, the epoxy matrix is a polymeric thermo-plastic matrix.
In another embodiment of the present invention, the matrix is a polymeric thermo-set matrix.
The filler material is composed of either mineral particles, synthetic particles or refractory particles.
The particles in one embodiment of the invention have a diameter less than one (1 ) millimeter, and in another embodiment of the present invention, the particles have a diameter of at least one (1 ) millimeter.
In another embodiment of the present invention, the filler material includes PTFE powder, together with glass fibers. In yet another embodiment of the present invention, the filler material includes PTFE powder, together with ceramic fibers.
Additionally, in another embodiment of the present invention, the filler material includes PTFE powder, together with quartz fibers and feldspar particles.
The reinforcing material is either a woven material, a knitted material, a braided material or a non-woven material.
The step of spirally winding the reinforcing material is carried out during the cross-linking of the matrix. Many variations and modifications of the combination of method steps according to the present invention will be readily apparent to those skilled in the art by a consideration of the detailed description contained hereinafter. However, such modifications and Variations fall within the spirit and scope of the present invention as defined by the appended claims.
Brief Description of the Drawings
Figure 1 is a schematic view representing the step of feeding the epoxy matrix into a container and agitating the same;
Figure 2 is a similar view to that shown in Figure 1 , but shows filler material being added to the matrix while the matrix is being agitated;
Figure 3 is a similar view to that shown in Figure 2, but shows the agitated matrix and filler being conveyed to an application zone and being applied to reinforcing material being unwound from a roll of reinforcing material; and
Figure 4 is a perspective view showing a press roll being spirally wound with the reinforcing material and matrix and filler according to the present invention.
Detailed Description of the Drawings
Figure 1 is a schematic view illustrating a method of manufacturing a cover for a press roll shell according to the present invention. Figure 1 shows an epoxy matrix 10 disposed within a container 12. The epoxy matrix 10 is being agitated by an agitator 14.
Figure 2 is a similar view to that shown in Figure 1 , but shows filler material 16 being added to the matrix 10 while the matrix 10 is being agitated within the container 12.
Figure 3 is a similar view to that shown in Figure 2, but shows the agitated matrix 10 and filler 16 being conveyed and pumped via pump P to an application zone, generally designated 18.
A roll 20 of reinforcing material 22 is unwound, as indicated by the arrow 26, such that the reinforcing material 22 extends past the application zone 18.
The agitated matrix and filler 10 and 16 are applied, as indicated by the arrow 26, to the unwound material 22 during passage of the unwound material 22 past the application zone 18.
Figure 4 is a perspective view of a press roll 28 and shows the roll 28 being spirally wound with the reinforcing material 22, the matrix 10 and filler 16 having been previously applied to the reinforcing material 22. The arrangement is such that the press roll 28 is covered with the reinforcing material 22, which is impregnated with the matrix 10 and filler 16. The surface characteristics of the resultant cover are consequently dependent on the amount and type of filler material 16 added to the matrix.
In specific embodiments of the present invention, the matrix 10 is either a polymeric thermo-plastic matrix or a polymeric thermo-set matrix. The filler material 16 is either composed of mineral particles, synthetic particles or refractory particles.
In one embodiment of the present invention, the filler material 16 includes particles having a diameter of less than one (1 ) millimeter, and in another embodiment of the present invention, the filler material 16 includes particles having a diameter of at least one (1 ) millimeter.
Additionally, the filler material 16 includes either PTFE powder together with glass fibers, PTFE powder together with ceramic fibers, or PTFE powder together with quartz fibers and feldspar particles.
The reinforcing material 22 is either a woven material, a knitted material, a braided material or a non-woven material.
The step of spirally winding the reinforcing material 22 is carried out during the cross-linking of the matrix.
The present invention provides a method of manufacturing a roll cover which exhibits the required durometer hardness for the particular type of paper being pressed.
Such hardness of the cover is not only a requirement according to the type of paper being manufactured, but also a requirement according to the type of coating that will be applied thereto for subsequent calendering.
Additionally, roll covers of varying durometer hardness will be required dependent upon the type of furnish being used. Although the present invention has been described with particular application to the provision of a cover for a press roll, it will be appreciated by those skilled in the art that such roll covers will also be applicable in soft calendering and the like.

Claims

WHAT IS CLAIMED IS:
1 . A method of manufacturing a cover for a press roll, said method comprising the steps of: feeding an epoxy matrix (10) into a container (1 2); agitating the epoxy matrix (10); adding filler material (1 6) to the matrix (10) while the matrix is being agitated; conveying the agitated matrix and (10 filler (1 6) to an application zone (1 8); unwinding a roll (20) of reinforcing material (22) such that the unwound reinforcing material (22) extends past the application zone (1 8); applying the agitated matrix (1 0) and filler (1 6) to the unwound material (22) during passage of the unwound material past the application zone (1 8); and spirally winding the reinforcing material (22) with the matrix (10) and filler (1 6) applied thereto around the press roll (28) such that the press roll (28) is covered with the reinforcing material (22) impregnated with the matrix (10) and filler (1 6), the arrangement being such that the surface characteristics of the resultant cover are dependent on the amount and type of filler material added to the matrix.
2. A method of manufacturing a cover as set forth in claim 1 , wherein the feeding step includes: feeding a polymeric thermo-plastic matrix into the container (1 2).
3. A method of manufacturing a cover as set forth in claim 1 , wherein the feeding step includes: feeding a polymeric thermo-set matrix into the container (12).
4. A method of manufacturing a cover as set forth in claim 1 , wherein the step of adding filler material includes: adding mineral particles to the matrix (10).
5. A method of manufacturing a cover as set forth in claim 1 , wherein the step of adding filler material includes: adding synthetic particles to the matrix (10).
6. A method of manufacturing a cover as set forth in claim 1 , wherein the step of adding filler material includes: adding refractory particles to the matrix (10).
7. A method of manufacturing cover as set forth in claim 1 , wherein the step of adding filler material includes: adding material having a particle size less than one (1 ) millimeter in diameter.
8. A method of manufacturing cover as set forth in claim 1 , wherein the step of adding filler material includes: adding material having a particle size of at least one (1 ) millimeter in diameter.
9. A method of manufacturing a cover as set forth in claim 1 , wherein the step of adding filler material includes: adding PTFE powder, together with glass fibers.
10. A method of manufacturing a cover as set forth in claim 1 , wherein the step of adding filler material includes: adding PTFE powder, together with ceramic fibers.
1 1 . A method of manufacturing a cover as set forth in claim 1 , wherein the step of adding filler material includes: adding PTFE powder, together with quartz fibers, together with feldspar particles.
12. A method of manufacturing a cover as set forth in claim 1 , wherein the reinforcing material (22) is a woven material.
13. A method of manufacturing a cover as set forth in claim 1 , wherein the reinforcing material (22) is a knitted material.
14. A method of manufacturing a cover as set forth in claim 1 , wherein the reinforcing material (22) is a braided material.
15. A method of manufacturing a cover as set forth in claim 1 , wherein the reinforcing material (22) is a non-woven material.
16. A method of manufacturing a cover as set forth in claim 1 , wherein the step of spirally winding the reinforcing material (22) is carried out during the cross-linking of the matrix (10).
EP93921473A 1992-10-16 1993-09-09 A method of manufacturing a cover for a press roll Expired - Lifetime EP0664843B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US96263692A 1992-10-16 1992-10-16
US962636 1992-10-16
PCT/US1993/008537 WO1994009208A1 (en) 1992-10-16 1993-09-09 A method of manufacturing a cover for a press roll

Publications (2)

Publication Number Publication Date
EP0664843A1 true EP0664843A1 (en) 1995-08-02
EP0664843B1 EP0664843B1 (en) 1997-10-29

Family

ID=25506169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93921473A Expired - Lifetime EP0664843B1 (en) 1992-10-16 1993-09-09 A method of manufacturing a cover for a press roll

Country Status (5)

Country Link
EP (1) EP0664843B1 (en)
JP (1) JP2881663B2 (en)
CA (1) CA2146770A1 (en)
DE (1) DE69314966T2 (en)
WO (1) WO1994009208A1 (en)

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US5601920A (en) * 1995-04-06 1997-02-11 Stowe Woodward Licensco, Inc. Covered roll and a method for making the same
DE19758443A1 (en) † 1997-03-14 1998-09-24 Voith Sulzer Finishing Gmbh Smoothing unit
FI111025B (en) 1997-05-30 2003-05-15 Metso Paper Inc A roll having a thermoplastic coating, a method of making the roll, a composition of a thermoplastic surface coating, a calendering process using rolls with a thermoplastic coating of the invention, and a paper / board made by the rollers
US6409645B1 (en) 1997-06-13 2002-06-25 Sw Paper Inc. Roll cover
DE19729189A1 (en) * 1997-07-08 1999-01-14 Voith Sulzer Papiermasch Gmbh Press roller for the press section of a papermaking machine, to extract water from the wet web
FI103740B1 (en) * 1998-06-02 1999-08-31 Valmet Corp Sheath for a nip roller
DE19925419A1 (en) * 1999-06-02 2000-12-07 Voith Sulzer Papiertech Patent Elastic roller and method of making it
US6776744B1 (en) 1999-07-28 2004-08-17 Advanced Materials Corporation Method for and devices used in covering a roll core with a resin infused fiber reinforced adhesive under layer and a polymeric top layer, the method including the use of an improved mold tape
US6793754B1 (en) 1999-07-28 2004-09-21 Advanced Materials Corporation Covered roll having an under-layer formed of resin infused densely packed fibers that provides increased strength and adhesion properties
US6206994B1 (en) 1999-07-28 2001-03-27 Advanced Materials Corporation Method and apparatus for covering a metal roll core with a polymeric material preferable a high performance thermoplastic material
DE60014275T2 (en) * 1999-07-28 2006-03-02 Advanced Materials Corp. Method and apparatus for applying a polymer coating to a substantially cylindrical roll core for calendering
DE10001409A1 (en) * 2000-01-14 2001-09-06 Voith Paper Patent Gmbh Elastic roller and method of making it
DE10339443A1 (en) * 2003-04-11 2004-10-21 Dirk Richter Method for coating a roller with a coating formed from at least two components by mixing the two components under vacuum generally useful in applying coatings by means of a roller
US6874232B2 (en) 2003-05-21 2005-04-05 Stowe Woodward, Llc Method for forming cover for industrial roll
DE102004025116A1 (en) 2004-05-21 2005-12-08 Voith Paper Patent Gmbh Fiber composite roll cover for machines processing flat materials comprises a compound whose composition varies in different areas
US10287731B2 (en) 2005-11-08 2019-05-14 Stowe Woodward Licensco Llc Abrasion-resistant rubber roll cover with polyurethane coating
DE102007006821A1 (en) * 2007-02-07 2008-08-14 Voith Patent Gmbh Roll cover with friction-reducing filler
JP5651847B2 (en) * 2011-04-06 2015-01-14 西武ポリマ化成株式会社 Manufacturing method of resin roll using cotton roll core metal for calendar
DE102011075810A1 (en) * 2011-05-13 2012-11-15 Voith Patent Gmbh CORROSION RESISTANT ROLL COATING
FI20115952L (en) 2011-09-29 2013-03-30 Metso Paper Inc Track coating
DE102012205227B3 (en) * 2012-03-30 2013-04-11 Voith Patent Gmbh Process for producing a roll cover and roll cover

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See also references of WO9409208A1 *
US-A- 3 069 304 *

Also Published As

Publication number Publication date
JPH07508566A (en) 1995-09-21
WO1994009208A1 (en) 1994-04-28
EP0664843B1 (en) 1997-10-29
JP2881663B2 (en) 1999-04-12
CA2146770A1 (en) 1994-04-28
DE69314966T2 (en) 1998-03-26
DE69314966D1 (en) 1997-12-04

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