Roll and method for producing a roll

A roll and structure technology, applied in textile and papermaking, printing press roll jacket, papermaking, etc., can solve the problems of high raw material cost and process cost, unfavorable melting, small coating rate, etc., to save materials and reduce manufacturing time. , the effect of reducing process costs

Inactive Publication Date: 2015-04-15
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Here, it is disadvantageous in the known prior art that the smelting has to be carried out due to the high melting point and the rheological properties of the chromium oxide melt and the mixture essentially consisting of chromium oxide and titanium oxide.
This leads to a low coating rate during the plasma spraying process, which also leads to layers that are expensive in terms of raw material costs and process costs, since multiple application stages are required in order to achieve a sufficient layer thickness

Method used

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  • Roll and method for producing a roll
  • Roll and method for producing a roll

Examples

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Embodiment Construction

[0030] exist figure 1 A section of a roller 1 with the features according to the invention is shown in a very schematic sectional view. The curvature of the rollers is disregarded for simplicity of illustration. It should also be noted that the thicknesses of the individual coatings of the roller 1 are not shown to correct scale. The order of the layers is indicated only symbolically.

[0031] A roller 1 constructed according to the invention usually has a roller core 2 which can consist of metal, for example steel, or currently also of a synthetic material, in particular a fiber-reinforced synthetic material.

[0032] The roll 1 can be used in different positions in a machine for manufacturing or processing fibrous webs, such as paper webs, cardboard webs or tissue webs. In the following the position of the central press roll in the press section of a fiber web machine is discussed in particular, since in this position technically the highest demands are placed on the roll...

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Abstract

The invention relates to a roll (1) for use in a machine for producing or finishing a web of fibrous material such as a paper, cardboard or tissue web comprising a roll core (2), at least one adhesion layer (3) formed thereon, and at least one ceramic layer (4) formed on the at least one adhesion layer (3). The at least one ceramic layer (4) contains an oxide compound in the form of a mixed oxide ceramic, at least in parts.

Description

technical field [0001] The invention relates to a roll according to the preamble of claim 1 for use in a machine for producing or improving a web of fibrous material, such as a paper web, a cardboard web or a tissue web, and a roll according to claim 12 The method used to manufacture such rollers of the preamble. Background technique [0002] In a machine for manufacturing web material, rolls are located in several positions. These rollers fulfill different tasks for guiding and guiding the fibrous web and / or the stretched wire, which can be dewatered, pressed, smoothed or dried. [0003] The roll according to the preamble of claim 1 is applied, for example, as a central press roll in the press section of a fiber web machine. Here, the fibrous web fed from the forming part directly contacts the surface of the roll. In the nip, most of the residual moisture still present is pressed out of the fiber web by means of a central press roll. Subsequently, the fibrous web is dra...

Claims

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Application Information

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IPC IPC(8): D21F3/08D21G1/02
CPCB41N7/00B41N2207/10D21F3/08B41N2207/02D21G1/0246D21H17/20D21H17/675D21H17/74
Inventor 亚历山大·埃奇迈尔
Owner VOITH PATENT GMBH
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