WO2006134208A1 - Lame de crêpage - Google Patents

Lame de crêpage Download PDF

Info

Publication number
WO2006134208A1
WO2006134208A1 PCT/FI2006/000196 FI2006000196W WO2006134208A1 WO 2006134208 A1 WO2006134208 A1 WO 2006134208A1 FI 2006000196 W FI2006000196 W FI 2006000196W WO 2006134208 A1 WO2006134208 A1 WO 2006134208A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
blade
drying cylinder
paper
wear
Prior art date
Application number
PCT/FI2006/000196
Other languages
English (en)
Inventor
Ingmar Vesterlund
Original Assignee
Ingmar Westerlund Consulting Oy
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 Ingmar Westerlund Consulting Oy filed Critical Ingmar Westerlund Consulting Oy
Publication of WO2006134208A1 publication Critical patent/WO2006134208A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/12—Crêping
    • B31F1/14—Crêping by doctor blades arranged crosswise to the web
    • B31F1/145—Blade constructions

Definitions

  • the present invention relates to a creping blade for a soft crepe paper machine, said blade being used to detach a paper web moving along a drying cylinder from the drying cylinder to form soft crepe paper.
  • a creping blade is used in paper manufacture to detach the paper web from the surface of the drying cylinder.
  • drying cylinders are cast from cast iron, and the creping blade detaches the paper web by "scratching" the cylinder surface.
  • the upper surface or upper edge of the blade produces a compressive force on the paper, thus producing a crepe structure typical of soft crepe paper as needed in the manufacture of soft crepe paper.
  • creping blade is subjected to sustained wear. For this reason, creping blades are typically coated with a wear-resistant material. Such a coating may be e.g. ceramic, forming a hard surface and thus reducing wear of the blade.
  • Specification SE 506 563 describes a blade structure in which the blade thickness is at least 0.5 mm but not over 2 - 3 mm, and in which the edge resting against the cylinder is uncoated, being therefore subjected to wear due to the sliding contact, but in which the upper surface coming into contact with the paper web is coated with a ceramic, metallic or composite coating to reduce wear.
  • a drawback with the solution disclosed in the SE specification in question is that the blade is subject to wear and reduction of thickness expressly in the portion against the cylinder, and that the surface facing against the paper also undergoes relative wear.
  • the object of the present invention is to overcome the drawbacks of prior-art technology and to provide a new type of creping blade.
  • the creping blade of the invention makes use of the very advantageous structure of diamond-like coatings (DLC) in particular in the area of the blade surface (upper surface, front surface) facing against the paper web.
  • DLC diamond-like coatings
  • the edge facing against the cylinder especially to reduce wear of the cylinder, can then be coated with a different coating, which can be produced via thermal spraying, e.g. plasma spraying (APS, Atmospheric Pressure Spraying, flame or HVOF (High Velocity OxyFuel) spraying.
  • thermal spraying e.g. plasma spraying (APS, Atmospheric Pressure Spraying, flame or HVOF (High Velocity OxyFuel) spraying.
  • Blades used at present are hardened and coated with ceramics or hard metal to increase the service life (e.g. WC-CoCr or TiO2).
  • the reduction of wear of the blade is based on the hardness of the coating.
  • the hardness of the coatings and hardening varies in the range of HV 700-1500. By increasing the hardness of the coating, it is possible to extend the service life of the blade.
  • Harder than the above-mentioned coatings are diamond or diamond- like carbon coatings (DLC). Diamond-like coatings are used because diamond is the hardest material known, HV 10000 on Vickers scale.
  • the coating is formed as a film of a thickness of 1-20 ⁇ m on the edge of a pre-ground blade.
  • the creping blade of the invention has a better resistance especially to long- term wear caused by the paper web than prior-art blades.
  • Fig. 1 illustrates the solution of the invention.
  • the creping blade is fixed to a blade holder, and it serves to detach the paper web 3 moving along the drying cylinder from the drying cylinder to form soft crepe paper.
  • the upper surface 21 coming into contact with the paper web 3 is coated with a diamond-like DLC blade coating 22, which can be advantageously formed on the surface of the blade by the so-called PVD coating method in a PVD reactor.
  • the edge or part 23 of the edge facing against the cylinder 1 is coated with a ceramic or equivalent wear-resistant coating 24, such as a wear-resistant material, such as a ceramic or hard-metal material (e.g. TiO2 or WC-Co).
  • the DLC coating 22 may also extend partly over the ceramic coating 24, as indicated in Fig. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne une lame de crêpage (2), qui est utilisée pour détacher une bande de papier (3) qui se déplace le long d’un cylindre sécheur (1) à partir du cylindre sécheur pour former du papier crêpé doux, dans laquelle lame la surface supérieure (21) destinée à être agencée contre le papier est enduite d’un revêtement (22) pour réduire l’usure, ledit revêtement (22) étant un revêtement sous forme de diamant.
PCT/FI2006/000196 2005-06-14 2006-06-14 Lame de crêpage WO2006134208A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20050629 2005-06-14
FI20050629A FI20050629A (fi) 2005-06-14 2005-06-14 Kreppausterä

Publications (1)

Publication Number Publication Date
WO2006134208A1 true WO2006134208A1 (fr) 2006-12-21

Family

ID=34778349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2006/000196 WO2006134208A1 (fr) 2005-06-14 2006-06-14 Lame de crêpage

Country Status (2)

Country Link
FI (1) FI20050629A (fr)
WO (1) WO2006134208A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108532352A (zh) * 2018-03-26 2018-09-14 赣州恩创科技有限公司 一种起皱刀及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB978988A (en) * 1962-12-14 1965-01-01 Lodding Engineering Corp Doctor blade
GB2128551A (en) * 1982-10-13 1984-05-02 Inventing Ab Scraper with wear-resistant coating
JPH05192629A (ja) * 1991-12-03 1993-08-03 Mitsubishi Heavy Ind Ltd コータブレードの製造方法
WO1999054520A1 (fr) * 1998-04-22 1999-10-28 Valmet Corporation Parties d'une machine a papier/carton ou de finissage soumises a une usure intensive, et procede de fabrication de telles parties

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB978988A (en) * 1962-12-14 1965-01-01 Lodding Engineering Corp Doctor blade
GB2128551A (en) * 1982-10-13 1984-05-02 Inventing Ab Scraper with wear-resistant coating
JPH05192629A (ja) * 1991-12-03 1993-08-03 Mitsubishi Heavy Ind Ltd コータブレードの製造方法
WO1999054520A1 (fr) * 1998-04-22 1999-10-28 Valmet Corporation Parties d'une machine a papier/carton ou de finissage soumises a une usure intensive, et procede de fabrication de telles parties

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108532352A (zh) * 2018-03-26 2018-09-14 赣州恩创科技有限公司 一种起皱刀及其制备方法
US20210053311A1 (en) * 2018-03-26 2021-02-25 Ganzhou En Chuang Technology Company Limited Creping blade and method for manufacturing same
EP3779037A4 (fr) * 2018-03-26 2021-07-07 Ganzhou en Chuang Technology Company Limited Lame de crêpage et son procédé de fabrication
CN108532352B (zh) * 2018-03-26 2024-03-29 赣州恩创科技有限公司 一种起皱刀及其制备方法
US11951708B2 (en) 2018-03-26 2024-04-09 Ganzhou En Chuang Technology Company Limited Creping blade and method for manufacturing same

Also Published As

Publication number Publication date
FI20050629A (fi) 2006-12-15
FI20050629A0 (fi) 2005-06-14

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