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Method for regulating gap of forming roll of calendar

A technology of forming rolls and calenders, applied in calenders, paper machines, textiles and paper making, etc., can solve problems such as forming efficiency of slow forming roll gaps

Inactive Publication Date: 2012-01-11
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The forming efficiency of slow forming nips is useless when all forming nips are active

Method used

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  • Method for regulating gap of forming roll of calendar
  • Method for regulating gap of forming roll of calendar
  • Method for regulating gap of forming roll of calendar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 Shows the load gap of the forming roll nip of a calender equipped with two forming roll nips in a solution according to the prior art, wherein the first forming roll nip N1 has a slow adjustment function, the second forming roll nip Seam N2 has a quick adjustment function. The fast adjustment function of the second forming nip N2 reacts quickly to disturbances occurring in the paper web at point 1), but the slow adjustment function of the first forming nip N1 does not react to disturbances occurring in the paper web Quick response.

[0025] figure 2 In a solution according to the prior art, the load gap of the forming roll nip of a calender equipped with two forming roll nips is shown, wherein both forming roll nips have the same load gap. At point 2) the situation is shown in which the second forming nip N2 is driven with manual adjustment. When the second forming nip N2 is switched back to automatic adjustment, the load gap of the second forming nip N2 s...

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PUM

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Abstract

A method for adjusting gapping place of forming rollers seam (N1, N2) of a plating press, wherein the plating press is composed of at least two forming rollers seam (N1, N2), each forming rollers seam (N1, N2) forming a loading gapping place, detecting whole width landscape orientation surface of the processing press finishing surface (W) by a detection device (30) installed at back of the last forming rollers seam (N2) along operation direction along the processing press finishing surface (W). In addition, in the method, all of the forming rollers seam (N1, N2) can process sharp separation adjustment, and one of the forming rollers seam (N1, N2) is selected as a reference forming rollers seam. Then, loading gapping place values of the reference forming rollers seam (N1, N2) are copied inbit by bit modus to form at least another loading gapping place of the forming rollers seam (N1, N2).

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 . Background technique [0002] Typically, calendering seeks to improve the properties of web-like materials such as paper or cardboard, such as smoothness and gloss. During the calendering process, the web is conveyed into a nip or calender nip formed between two rollers pressed against each other, in which the web is subjected to heat, humidity and deformed by seam pressure. In a calender, a nip is formed between a contact pressure roll with a smooth surface, such as a metal roll, and a roll provided with an elastic layer, such as a polymer roll. Rollers with elastic surfaces match the surface shape of the web and press the opposite side of the web evenly against the smooth-surfaced contact pressure roll. [0003] Multiple roll calenders consist of at least two rolls, between which a roll gap is formed. Multiple roll calenders can consist of sets of rolls, wherein roll gaps ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21G1/00
CPCD21G1/0046
Inventor 尤哈尼·托帕里
Owner METSO PAPER INC