Machine and method for producing one or more layers of fibrous webs consisting of cardboard or wrapping paper

A technology of fiber material and wrapping paper, applied in the field of fiber material web machine, can solve the problems of quality loss and so on

Active Publication Date: 2016-03-16
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a loss of quality mainly in the cardboard type

Method used

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  • Machine and method for producing one or more layers of fibrous webs consisting of cardboard or wrapping paper
  • Machine and method for producing one or more layers of fibrous webs consisting of cardboard or wrapping paper

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0029] exist figure 1 In the diagram, a first embodiment of a paper machine for producing a one- or multi-layer fibrous web 1 of cardboard or packaging paper is shown schematically according to the invention.

[0030] The fiber suspension forming the layers of the multilayer web produced afterwards is uniformly distributed in the forming unit 2 over the respectively corresponding forming wires 2a, 2b, 2c via separate headboxes 3a, 3b, 3c, and These are successively joined together to form a multilayer fibrous or cardboard web 1 .

[0031] In the forming unit 2 or wire section, eg white material is processed, which either consists of pulp, white old paper or a combination of white old paper and pulp.

[0032] The forming wire 2a is an elongated wire and transfers the wet fibrous web 1 to a press section 4 having a plurality of separate smoothing nips arranged one behind the other.

[0033] In this embodiment, the fibrous web 1 passes in the machine direction L through three p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention relates to a machine for producing a single-ply or multiple-ply fibrous web (1) of cardboard or packaging paper, having a pressing section (4) for dewatering the fibrous web (1), which pressing section (4) contains a plurality of separate smoothing nips (4a, 4b, 4c) which are arranged behind one another, and having a calender (7) which is also arranged upstream of a following coating device (8). It is provided according to the invention that, as viewed in the machine running direction (L), the last of the plurality of pressure nips (4c) is formed by a nipping press (5) which has two rollers (5.2, 5.3) which are pressed against one another, wherein one of the rollers (5.3) is of smooth configuration and has a surface consisting of ceramic with a minimum thickness of 0.6 mm and a minimum hardness of 800 HV (Vickers hardness), and the calender (7) is configured as a belt calender (7.1) or as a hot calender (7.2). The invention also relates to a method.

Description

technical field [0001] The invention relates to a machine for the manufacture of one or more layers of fibrous web consisting of cardboard or wrapping paper, having a press section for dewatering the fibrous web and a calender, the press section comprising a plurality of independent The smoothing nip arranged one behind the other, the calender is also arranged in front of the subsequent coating device. Background technique [0002] Currently, one or more layers of cardboard and packaging paper are smoothed and compacted at different points in the paper machine. For this purpose, it is customary to use at least one so-called smoothing press, which does not lay a felt or simply lays a felt, wherein the web-contacting rolls are designed with a soft or hard coating. [0003] Pre-calendering usually also takes place before the coating process. This is possible with all known types of calenders with hard or soft nips. [0004] Accompanying the calendering process, the fibrous w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21G1/00D21G1/02D21F3/02
CPCD21G1/00D21F3/02D21F3/04D21G1/006D21G1/0066D21G1/0246
Inventor R.沙依弗林格S.隆米克G.巴科夫斯基S.汉普
Owner VOITH PATENT GMBH
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