Method for guiding web patching using a re-reeler and a corresponding system

A technology for rewinding machines and paper webs, which is applied in material analysis, papermaking, papermaking machines, etc. through optical means, and can solve problems such as the causal relationship investigation of deviations that hinder paper breaking

Inactive Publication Date: 2011-10-19
METSO AUTOMATION OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In plants according to the prior art, the paper machine, rewinder and coater are separate units between which information about deviations leading to web breaks at the coater is poorly communicated
The poor transfer of information between these units significantly hinders the investigation of the causality of the deviation leading to the web break

Method used

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  • Method for guiding web patching using a re-reeler and a corresponding system
  • Method for guiding web patching using a re-reeler and a corresponding system
  • Method for guiding web patching using a re-reeler and a corresponding system

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Embodiment Construction

[0024] Figure 1a A system 10 ′ according to the prior art is shown in which a paper web is first produced on a paper machine 12 . The produced web is coated on an off-line coater 16 after being rewound on a rewinder 14, cut to standard width and repaired. Coater 16 is roughly divided into three sections, namely unwind 18 , coating section 20 and take-up 22 . After the coater, coating bumps and streaks are removed from the web on a second rewinder (not shown). Thereafter, the web can be calendered. The same rewinder that rewinds before the coater can be used in post-coater removal of coating pimples and streaks, but usually a second rewinder is used to rewind after the coater.

[0025] exist Figure 1a In the illustrated system according to the prior art, a defect map is generated for display to the operator of the coating machine from the defects in the web prior to coating. The defect map 31 is generated using image processing from image data imaged by the defect detection ...

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Abstract

The invention relates to a method for guiding web patching, using a re-reeler, in connection with a paper machine and an off-line coating machine (16), in which method a defect map (31) of the web is created on the paper machine (12), to show deviations (P), some of which are shown on the coating machine (16), using selected criteria, to the operator, the said deviations being patched using the re-reeler, guided by the defect map (31) and preset patching rules (144). On the coating machine (16), the virtual location of the selected deviations (P) is monitored through the coating machine (16),and if a possible web break occurs, a deviation (P) is localized relative to the web break, and on the basis of this monitoring, feedback (27) is provided to the patching rules (144) of the re-reeler(14), in order to optimize them.

Description

technical field [0001] The present invention relates to a method of web patching guided by a re-reeler combined with a paper machine and an off-line coating machine, in which In the method, a defect map of the paper web is generated on the paper machine to show the operator the deviations to be repaired with the rewinder according to the defect map and preset repair rules. The invention also relates to a corresponding system in combination with a paper machine, a rewinder and an off-line coater. From the simulations, it can be said that the invention improves the efficiency of the coater since the repair of the web is the most notable factor related to the efficiency of the coater. Background technique [0002] Systems are known from the prior art for monitoring deviations in a web being coated on an off-line coating machine. In these systems, a defect map of the web is generated from defect detection performed on a fiber-web machine, which is then displayed to the operato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/89
CPCB65H26/025B65H2301/5114B65H2511/52B65H2551/21B65H2553/42B65H2801/84B65H26/02D21G9/0009D21H23/78G01N21/8903
Inventor H·鲁斯卡
Owner METSO AUTOMATION OY
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