WO1997030212A1 - Foil blade - Google Patents

Foil blade Download PDF

Info

Publication number
WO1997030212A1
WO1997030212A1 PCT/GB1997/000425 GB9700425W WO9730212A1 WO 1997030212 A1 WO1997030212 A1 WO 1997030212A1 GB 9700425 W GB9700425 W GB 9700425W WO 9730212 A1 WO9730212 A1 WO 9730212A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
wear
adhesive
substrate
resistant
Prior art date
Application number
PCT/GB1997/000425
Other languages
French (fr)
Inventor
Duncan Anderson
Original Assignee
Plasma Coatings Limited
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 Plasma Coatings Limited filed Critical Plasma Coatings Limited
Publication of WO1997030212A1 publication Critical patent/WO1997030212A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars

Definitions

  • the present invention relates to a blade for use in apparatus such as that used for forming and processing material in sheet form, and particularly to a wear-resistant foil blade suitable for conveying a moving paper web during the manufacture of paper.
  • Blade arrangements in existence incorporate the use of coatings that are thermally sprayed onto metal blades. Such blades can subsequently be bonded or held in close contact with a plastic sub-structure.
  • Thermal spraying techniques have a disadvantage in that they are expensive, requiring costly spraying equipment and associated safety equipment and also involve a high energy consumption. Furthermore, thermal spraying techniques present difficulties in depositing a wear-resistant layer directly onto a plastics sub-structure in view of the high temperatures that can damage the sub-structure. This is disadvantageous in view of the cost and weight advantages that plastics can afford over metal.
  • a method of manufacture of a blade comprising a substrate and a wear-resistant layer, the method including the step of: - applying the wear-resistant layer in the form of an adhesive, the adhesive comprising wear-resistant particles suspended in an unset settable material.
  • the adhesive is sprayed onto the blade substrate. Spraying is advantageous in that it provides an even distribution of material onto the blade substrate.
  • the adhesive may be applied mechanically to the blade substrate, for example by extrusion techniques.
  • the method comprises the further step of adding further blade surface materials whilst the adhesive is unset.
  • further materials may be applied by thermal spraying or by mechanical means.
  • the method may comprise the step of applying pre-for ed wear- resistant tiles onto the blade substrate and applying the adhesive between edges of adjacent tiles.
  • the present invention further encompasses a blade manufactured according to the materials defined above.
  • the adhesive comprises a polymer material in which is suspended any of silicon carbide, tungsten, alumina, zirconia or chrome oxide particles.
  • the blade substrate is recessed in an area where the adhesive is to be applied. Such recessing facilitates the application of the adhesive layer.
  • the substrate comprises a removable member onto which the wear-resistant layer is formed.
  • the removable member may be hollow.
  • the wear-resistant particles form 50-70% by weight of the wear-resistant layer.
  • a foil blade for use in processing sheet material comprising a polymer material in which is suspended wear- resistant particles.
  • Figure 1 shows a blade in accordance with a first embodiment of the present invention
  • Figure 2 shows a blade in accordance with a second embodiment of the present invention
  • Figure 3 show a cross-sectional view of the blade shown in Figures 1 or 2 ;
  • Figure 4 shows an alternative blade.
  • a blade 1 for use with paper mill equipment includes a substrate 3, preferably formed of plastics or a glass fibre composite material, and an adhesive mixture wear-resistant layer 2.
  • the wear-resistant layer may be formed using any suitable materials, although one or more of silicon carbide, tungsten, alumina, zirconia or chrome oxide are preferred for use as wear-resistant particles.
  • Such particle ⁇ are preferably provided within an epoxy material, e.g. a thermo setting or thermo plastics material.
  • the particles are generally in the range of 50-70% by weight of the wear-resistant layer. With silicon carbide particles for example, the particles are preferably around 55% by weight of the wear-resistant layer.
  • the wear-resistant layer 2 may be applied to the substrate 3 using spraying techniques or may be applied mechanically, for example by extrusion techniques.
  • Additional blade surface materials may be applied to the adhesive layer whilst it is ⁇ till sticky, i.e. whilst it has not dried. Such additional materials may be applied mechanically (cold) or by thermal spraying.
  • the wear-resistant layer may be formed by applying a layer of pre-made tiles 4 onto an adhesive layer 5 and filling the gaps 6 between the tiles with the epoxy adhesive composite mixture. Blades of over 10 metres can be produced in this way.
  • the pre-made tiles can be formed in any suitable manner, using for example casting or extrusion techniques.
  • the tiles may be relatively short so that a number are required along the length of the blade, or relatively long so as to extend along the whole length of the blade.
  • the adhesive wear-resistant layer 2 may be applied to one or more of the faces of the blade substrate to provide a suitable wear-resistant layer.
  • the substrate 3 may be recessed to assist in the application of the adhesive material. The recess will also result in a secure mounting of the wear-resistant layer.
  • the substrate may include a removable member 7 onto which the wear-resistant layer is formed.
  • the removable member 7 may be formed hollow, as shown by phantom-lines 9, as an extrusion.
  • the removable member 7 can facilitate reconditioning of the foil blade on wearing down of the layer 2.
  • the removable member can be dovetailed with the main substrate 3 for strength.
  • the substrate 3 may itself include a channel 8 for easy mounting thereof on a sub-structure.
  • Figure 4 shows an alternative blade structure where the blade is an integral member with no separate substrate.
  • the blade comprises a polymer base material, such as a plastics material, in which is suspended wear-resistant particles of the sort described above.
  • the blade may be cast or extruded.

Abstract

The present invention concerns a foil blade (1) and its method of manufacture. The blade comprises a substrate (3) and a wear-resistant layer (2), the wear-resistant layer being applied as an adhesive, the adhesive comprising wear-resistant particles suspended in an unset settable material.

Description

FOIL BLADE
The present invention relates to a blade for use in apparatus such as that used for forming and processing material in sheet form, and particularly to a wear-resistant foil blade suitable for conveying a moving paper web during the manufacture of paper.
Blade arrangements in existence incorporate the use of coatings that are thermally sprayed onto metal blades. Such blades can subsequently be bonded or held in close contact with a plastic sub-structure.
Thermal spraying techniques have a disadvantage in that they are expensive, requiring costly spraying equipment and associated safety equipment and also involve a high energy consumption. Furthermore, thermal spraying techniques present difficulties in depositing a wear-resistant layer directly onto a plastics sub-structure in view of the high temperatures that can damage the sub-structure. This is disadvantageous in view of the cost and weight advantages that plastics can afford over metal.
It is therefore an object of the present invention to provide a blade and a method of manufacture thereof which overcomes the disadvantages of the prior art.
According to an aspect of the present invention there is provided a method of manufacture of a blade comprising a substrate and a wear-resistant layer, the method including the step of: - applying the wear-resistant layer in the form of an adhesive, the adhesive comprising wear-resistant particles suspended in an unset settable material.
Preferably, the adhesive is sprayed onto the blade substrate. Spraying is advantageous in that it provides an even distribution of material onto the blade substrate. Alternatively however, the adhesive may be applied mechanically to the blade substrate, for example by extrusion techniques.
Conveniently, the method comprises the further step of adding further blade surface materials whilst the adhesive is unset. Such further materials may be applied by thermal spraying or by mechanical means.
The method may comprise the step of applying pre-for ed wear- resistant tiles onto the blade substrate and applying the adhesive between edges of adjacent tiles.
The present invention further encompasses a blade manufactured according to the materials defined above.
In preferred embodiments, the adhesive comprises a polymer material in which is suspended any of silicon carbide, tungsten, alumina, zirconia or chrome oxide particles.
Preferably the blade substrate is recessed in an area where the adhesive is to be applied. Such recessing facilitates the application of the adhesive layer.
Conveniently, the substrate comprises a removable member onto which the wear-resistant layer is formed. The removable member may be hollow.
In preferred embodiments, the wear-resistant particles form 50-70% by weight of the wear-resistant layer.
According to a further aspect of the present invention, there is provided a foil blade for use in processing sheet material comprising a polymer material in which is suspended wear- resistant particles. Certain preferred embodiments of the invention will now be described with reference to the accompanying drawings; of which:-
Figure 1 shows a blade in accordance with a first embodiment of the present invention;
Figure 2 shows a blade in accordance with a second embodiment of the present invention;
Figure 3 show a cross-sectional view of the blade shown in Figures 1 or 2 ; and
Figure 4 shows an alternative blade.
As shown in Figure 1, a blade 1 for use with paper mill equipment includes a substrate 3, preferably formed of plastics or a glass fibre composite material, and an adhesive mixture wear-resistant layer 2.
The wear-resistant layer may be formed using any suitable materials, although one or more of silicon carbide, tungsten, alumina, zirconia or chrome oxide are preferred for use as wear-resistant particles. Such particleε are preferably provided within an epoxy material, e.g. a thermo setting or thermo plastics material. The particles are generally in the range of 50-70% by weight of the wear-resistant layer. With silicon carbide particles for example, the particles are preferably around 55% by weight of the wear-resistant layer.
The wear-resistant layer 2 may be applied to the substrate 3 using spraying techniques or may be applied mechanically, for example by extrusion techniques.
Additional blade surface materials may be applied to the adhesive layer whilst it is εtill sticky, i.e. whilst it has not dried. Such additional materials may be applied mechanically (cold) or by thermal spraying.
As shown in Figure 2, the wear-resistant layer may be formed by applying a layer of pre-made tiles 4 onto an adhesive layer 5 and filling the gaps 6 between the tiles with the epoxy adhesive composite mixture. Blades of over 10 metres can be produced in this way.
The pre-made tiles can be formed in any suitable manner, using for example casting or extrusion techniques. The tiles may be relatively short so that a number are required along the length of the blade, or relatively long so as to extend along the whole length of the blade.
The adhesive wear-resistant layer 2 may be applied to one or more of the faces of the blade substrate to provide a suitable wear-resistant layer. As shown in Figure 3, the substrate 3 may be recessed to assist in the application of the adhesive material. The recess will also result in a secure mounting of the wear-resistant layer. The substrate may include a removable member 7 onto which the wear-resistant layer is formed. For enhanced weight characteristics, the removable member 7 may be formed hollow, as shown by phantom-lines 9, as an extrusion. The removable member 7 can facilitate reconditioning of the foil blade on wearing down of the layer 2. The removable member can be dovetailed with the main substrate 3 for strength.
The substrate 3 may itself include a channel 8 for easy mounting thereof on a sub-structure. Figure 4 shows an alternative blade structure where the blade is an integral member with no separate substrate. The blade comprises a polymer base material, such as a plastics material, in which is suspended wear-resistant particles of the sort described above. The blade may be cast or extruded.
It will be understood that the embodiments illustrated show an application of the invention in one form only for the purposes of illustration. In practice, the invention may be applied to many different configurations, the detailed embodiments being straightforward for those skilled in the art to implement.

Claims

1. A method of manufacture of a blade comprising a substrate and a wear-resistant layer, the method including the step of:- applying the wear-resistant layer in the form of an adhesive, the adhesive comprising wear-resistant particles suspended in an unset settable material.
2. A method as claimed in claim 1, wherein the adhesive is sprayed onto the blade substrate.
3. A method as claimed in claim 1, wherein the adhesive is extruded onto the blade substrate.
4. A method as claimed in any preceding claim, wherein additional blade surface materials are applied whilst the adhesive is unset.
5. A method as claimed in any preceding claim, further comprising the step of applying pre-formed wear-resistant tiles onto the blade substra e and applying the adhesive between edges of adjacent tiles.
6. A blade manufactured according to the method of any preceding claim.
7. A blade as claimed in claim 6, wherein the adhesive comprises a polymer in which is suspended any of silicon carbide, tungsten, alumina, zirconia or chrome oxide particles.
8. A blade as claimed in claim 6 or 7 , wherein the blade substrate is recessed to accept the adhesive.
9. A blade as claimed in any one of claims 6 to 8, wherein the substrate comprises a removable member onto which the wear-resistant layer is formed.
10. A blade as claimed in any one of claims 6 to 9, wherein the wear-resistant particles are 50-70% by weight of the wear- resistant layer.
11. A foil blade for use in processing material in sheet form comprising a polymer material in which is suspended wear- resistant particles.
12. A blade substantially as hereinbefore described with reference to Figures 1 to 3 or 4 of the accompanying drawings.
13. A method substantially as hereinbefore described with reference to Figures 1 to 3 or 4 of the accompanying drawings.
PCT/GB1997/000425 1996-02-14 1997-02-14 Foil blade WO1997030212A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9602984.8A GB9602984D0 (en) 1996-02-14 1996-02-14 Foil blade
GB9602984.8 1996-02-14

Publications (1)

Publication Number Publication Date
WO1997030212A1 true WO1997030212A1 (en) 1997-08-21

Family

ID=10788670

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/000425 WO1997030212A1 (en) 1996-02-14 1997-02-14 Foil blade

Country Status (2)

Country Link
GB (1) GB9602984D0 (en)
WO (1) WO1997030212A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1316640A2 (en) * 2001-11-21 2003-06-04 Metso Paper, Inc. Dewatering member with a composite body for a paper or board machine and method for manufacturing a dewatering member with a composite body for a paper or board machine
WO2005054574A1 (en) * 2003-11-20 2005-06-16 Btg Eclepens S.A. Materials for dewatering elements

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103261A (en) * 1964-02-07 1968-02-14 Feldmuehle Ag Improvements in foils for the wet section of paper-making machines
FR2179973A1 (en) * 1972-04-12 1973-11-23 Union Carbide Corp
GB2079803A (en) * 1980-07-10 1982-01-27 Irapa Vyvojovy A Racional Drainage elements
US4334958A (en) * 1980-08-25 1982-06-15 Fred W. Meyers Production of conveyor support bars for paper making machinery
JPS57108139A (en) * 1980-11-28 1982-07-06 Hitachi Chem Co Ltd Lightweight synthetic resin molded article
FR2619131A1 (en) * 1987-08-06 1989-02-10 Loustau Philippe Component of a papermaking machine
US5387172A (en) * 1992-08-13 1995-02-07 Sigri Great Lakes Carbon Gmbh Fiber-reinforced plastic cylinder with an outer wear-resistant layer of filler-containing plastic and a method for producing the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103261A (en) * 1964-02-07 1968-02-14 Feldmuehle Ag Improvements in foils for the wet section of paper-making machines
FR2179973A1 (en) * 1972-04-12 1973-11-23 Union Carbide Corp
GB2079803A (en) * 1980-07-10 1982-01-27 Irapa Vyvojovy A Racional Drainage elements
US4334958A (en) * 1980-08-25 1982-06-15 Fred W. Meyers Production of conveyor support bars for paper making machinery
JPS57108139A (en) * 1980-11-28 1982-07-06 Hitachi Chem Co Ltd Lightweight synthetic resin molded article
FR2619131A1 (en) * 1987-08-06 1989-02-10 Loustau Philippe Component of a papermaking machine
US5387172A (en) * 1992-08-13 1995-02-07 Sigri Great Lakes Carbon Gmbh Fiber-reinforced plastic cylinder with an outer wear-resistant layer of filler-containing plastic and a method for producing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 197 (C - 128) 6 October 1982 (1982-10-06) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1316640A2 (en) * 2001-11-21 2003-06-04 Metso Paper, Inc. Dewatering member with a composite body for a paper or board machine and method for manufacturing a dewatering member with a composite body for a paper or board machine
EP1316640A3 (en) * 2001-11-21 2004-11-17 Metso Paper, Inc. Dewatering member with a composite body for a paper or board machine and method for manufacturing a dewatering member with a composite body for a paper or board machine
US7291248B2 (en) 2001-11-21 2007-11-06 Exel Oyj Dewatering member with a composite body for a paper or board machine and method for manufacturing a dewatering member with a composite body for a paper or board machine
WO2005054574A1 (en) * 2003-11-20 2005-06-16 Btg Eclepens S.A. Materials for dewatering elements
US7513976B2 (en) 2003-11-20 2009-04-07 Btg Eclepens, S.A. Materials for dewatering elements
KR101120473B1 (en) 2003-11-20 2012-02-29 비티지 에클레펜 엣스.에이. Materials for dewatering elements

Also Published As

Publication number Publication date
GB9602984D0 (en) 1996-04-10

Similar Documents

Publication Publication Date Title
US6205731B1 (en) Front panel positioned in front of a facing construction
KR870009107A (en) Method for Attaching Single Particle Layer to the Ballade Tip Surface
CN105556047A (en) Vacuum glazing pillars delivery films and methods for insulated glass units
UA88876C2 (en) THERMAL barrier coating with stabilized elastic microstructure
JP2008516525A5 (en)
BR8200189A (en) PROCESS TO PREPARE A SILAZAN POLYMER SILAZAN POLYMER SO OBTAINED A PROCESS TO PREPARE A SILICON CARBIDE CERAMIC MATERIAL PROCESS TO PREPARE AN ARTICLE COATED WITH CERAMICS AND SUCH ARTICLE
US4617198A (en) Method for making roofing
FR2740380B1 (en) METHOD FOR MANUFACTURING A VARIABLE PITCH BLADE FROM COMPOSITE MATERIAL FOR HELICOPTER ROTOR
JPH0386535A (en) Adaptive high molecular marking sheet
WO1997030212A1 (en) Foil blade
ES526398A0 (en) INSTALLATION FOR THE THERMAL TREATMENT OF FINE GRAIN MATERIAL, ESPECIALLY FOR THE MANUFACTURE OF CEMENT
US8152969B2 (en) Hydrofoil for a papermaking installation
EP0150882B1 (en) Conductive die attach tape
PT894588E (en) METHOD FOR FORMING CERAMIC TILES INCLUDING THOSE OF LARGE DIMENSIONS THROUGH PARTIALLY ISOSTATIC MOLDS AND A DEVICE FOR IMPLEMENTING THE METHOD
US3707432A (en) Reinforced fibrous felts for roofing shingle manufacture
EP0538522A1 (en) Method of making composite building elements
FR2703076B1 (en) A method of forming a tough, electrically insulating layer on the surface of a copper material.
FI113677B (en) Wear-resistant coating sheet or equivalent sheet for treating a paper web
US5425979A (en) Concrete protection sheet with signalling and reflective layer
KR101146393B1 (en) Device for manufacturing wide surface blanket and method for manufacturing the blanket using the same
SU1186083A3 (en) Protective coating for belt conveyer drum
CN110545924A (en) coated strip
US5701659A (en) Method of making a thin film thermal printhead
EP4137238A1 (en) Multiple slot die coater
CA2152738A1 (en) Production Process of Siding Elements Cut in a Composite Slab and Siding Elements Obtained Thereof

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CA GB HU JP NO US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97529115

Format of ref document f/p: F

NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase