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Roller for a machine for producing, further processing and/or finishing a fibrous material web

A fiber web and roller technology

Inactive Publication Date: 2015-12-30
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the known roller here is mainly that the entire roller sleeve must be designed to be electrically conductive in terms of structure and / or radial extension, which leads to a very high expenditure of material and costs.

Method used

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  • Roller for a machine for producing, further processing and/or finishing a fibrous material web
  • Roller for a machine for producing, further processing and/or finishing a fibrous material web

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Possible configurations of calender roll sleeves for electrical conductivity:

[0036] Here, the electrical conductivity is reduced by the alternative reinforcement carrier in the active layer 6 , the intermediate layer 5 electrically connected to the roller core 2 and the known adhesion promoter layer 4 .

[0037] - Adhesion promoter layer 4 implemented in a known manner

[0038] - an intermediate layer 5 implemented in a known manner

[0039] - one or more copper wires wound helically in the circumferential direction

[0040] - Effect layer 6:

[0041] Fill epoxy with inorganic fillers (~44%)

[0042] Aramid non-woven fabric with 97% hydroentangled para-aramid, 3% silver filaments, approximately 60g / m 2 flat ground

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Abstract

The invention relates to a roller (1) for a machine for producing, further processing and / or finishing a fibrous material web such as a paper, paperboard or tissue web, said roller comprising a roller core (2) and a roller cover (3) arranged on the roller core (2) and having at least one layer. According to the invention, at least one device (7) is provided in the roller cover (3) for conducting away electrical charges, said device being conductively connected to a ground connection located outside the roller (1).

Description

technical field [0001] The invention relates to a press according to the preamble of claim 1, especially for use in machines for producing and / or improving fibrous webs such as paper webs, cardboard webs or tissue webs and preferably for smoothing paper webs. Rolls used in light machines. Background technique [0002] Rollers of this type generally have a roll core made of metallic or composite material, which is provided with a roll cover which usually has at least one bonding layer and an active layer which contacts the fibrous web. [0003] Electrostatic charging occurs by friction due to the frictional contact of the fibrous web with its contact partner, eg a roll. This electrostatic charging induces a potential difference between the fibrous web or roll cover and its surroundings, for example with respect to a grounded machine support. This potential difference can lead to electrostatic discharge, which is dangerous for people and machines. [0004] Protection agains...

Claims

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Application Information

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IPC IPC(8): D21G1/02
CPCD21G1/02
Inventor 弗里德里希·克诺尔斯特凡·波拉舍克
Owner VOITH PATENT GMBH
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