Method and machine for producing a paper web that is smooth on one side

A paper width, smoothing technology, applied in the paper machine, papermaking, textiles and papermaking, etc., can solve the problem of not setting the width guide, etc., to achieve the effect of improving production efficiency

Active Publication Date: 2010-03-24
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In a method and a machine of the type mentioned at the outset, known from DT 24 43 099 A1, the paper web to be produced is moved on the felt after the first press nip, which in turn leads to undesired remoistening
Furthermore, it is disadvantageous that there is no web guidance supported by tensioning elements (Bespannung) in the press area

Method used

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  • Method and machine for producing a paper web that is smooth on one side
  • Method and machine for producing a paper web that is smooth on one side
  • Method and machine for producing a paper web that is smooth on one side

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Embodiment Construction

[0026] figure 1 An exemplary embodiment of a machine according to the invention for producing a one-sided smooth paper web with a forming zone 14 , a pressing zone 16 and a drying zone is shown in a schematic partial view 18.

[0027] In this case, the paper web 12 to be produced is received from the screen 24 by means of the water-absorbing first press felt 20 in the region of the first pick-up roll 22 wound by the press felt 20 and combined with the first press felt 20 The first press nip 28 assigned to the press zone 16 is guided together with a smooth conveyor belt 26 , which is at least substantially non-absorbent. The first press felt 20 is transferred away directly after the first press nip 28 from the paper web 12 and the smooth transfer belt 26 on which the paper web 12 exits the first press nip 28 .

[0028] Next, the paper web 12 is received from the smoothing conveyor belt 26 by means of a second press felt 30 which is preferably moist and in particular unstructu...

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Abstract

The invention relates to a method to manufacture a fibrous web in the form of a paper web, which is smooth on one side, by a papermaking machine having a forming area (14), a pressing area (16) and a drying area (18). The method including picking up the paper web (12) from the forming area by a water absorbent first press felt; guiding the paper web (12) together with the first press felt (20) and a smooth transfer belt (26) through a first press nip. The smooth transfer belt is configured to substantially not absorb any water. The first press nip being a part of the pressing area. The first press felt (20) being configured to be separated and led away from the paper web (12) immediately after the first press nip. The method further including the steps of leading the paper web together with the smooth transfer belt away from the first press nip; and subsequently leading the paper web from the smooth transfer belt by way of a conditioned water absorbent second press felt (30), the second press felt not passing through the first press nip (28); and subsequently guiding the paper web together with the second press felt through a second press nip (32), the second press nip being associated with the drying area (18).

Description

technical field [0001] The present invention relates to a machine and method for producing a single-sided smooth paper web. Background technique [0002] At present it is customary to manufacture on so-called MG machines (MG = smoothing machine) with a weight per unit area of ​​20 g / m 2 to 80g / m 2 between, especially at 16g / m 2 to 40g / m 2 A smooth, one-sided paper web in between. Here, the web with a relatively low dry weight content is conveyed by means of a press roll to a smooth or Yankee cylinder. However, the production efficiency of such machines is limited by the evaporation efficiency of the drum and the hood associated with the drum. Although wet pressing prior to the levelling drum is already known. However, closed web guidance is required here due to the low basis weight. Therefore, the press is double felted in this case, whereupon the achievable dry weight content is limited by remoisturization. [0003] In a method and a machine of the type described at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F3/02D21F3/04
CPCD21F3/045D21F3/0281
Inventor 彼得·米尔斯伯格
Owner VOITH PATENT GMBH
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