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Board machine

A cardboard machine and pulp technology, applied in paper machine, wet end of paper machine, paper making, etc., can solve problems such as increase in total cost, and achieve the effect of reducing investment and operating cost, low energy consumption and cost saving

Inactive Publication Date: 2013-08-07
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, providing strength requires better fiber and beating energy, which again increases the overall cost

Method used

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Embodiment Construction

[0034] figure 1 A schematic diagram is shown of a board machine according to the invention with two separate forming sections consisting of partial webs. The first wire unit comprises a lower wire 11 on which a first Fourdrinier section T1 is formed. A first headbox 100 , which is a double-layer headbox, feeds a jet of pulp suspension to a first forming board 200 located behind the first breast roll 12 . Water is uploaded from above the lower wire 11 on the first fourdrinier section T1 traveling along the first forming plate 200 by utilizing the dehydration fitting 15 (it may be a water suction box provided with a strip cover) arranged below the lower wire 11 The delivered web is removed.

[0035] Following the first wire unit is a second wire unit comprising an upper wire 21 on which a second Fourdrinier section T2 is formed. On the upper wire 21 , a second headbox 110 , which is a single-layer headbox, feeds a jet of pulp suspension onto a second forming plate 300 located...

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Abstract

A board machine comprises a forming section where a lower wire loop (11) forms a fourdrinier-wire section (Tl) at the beginning of which is located a forming board (200) which consists of at least one stationary, non-pulsating forming shoe (210). In the forming shoe (210), there is a cover (211) provided with thorough holes (212), setting against the inner surface of the lower wire loop (11). A first headbox (100), which is a multi-layer headbox, feeds a pulp suspension jet onto the forming shoe (210). The board machine further comprises a press section (Pl) where a surface (Wa) of the web (W) having been against the lower wire loop (11) is pressed against a smooth surface, a dryer section (Dl) where the web (W) is dried with at least one cylinder-dryer group and a coating section (400) where at least the surface (Wa) of the web (W) having been against the lower wire (11) is coated.

Description

technical field [0001] The invention relates to a method for forming a multilayer web. [0002] The invention also relates to a board machine. Background technique [0003] Liner board is used as the surface layer of corrugated board. The typical basis weight range of containerboard is 100-350g / cm 2 . Linerboard includes a top layer (top layer) and a back layer (back layer), which may have a protective layer in between. Liner board is made of different raw materials in order to utilize various surface layers. Both virgin and recycled fibers are used to make containerboard. The linerboard mainly made of virgin fibers is called kraftliner, while the linerboard made of recycled fibers is called testliner. In recent years, almost all containerboards are manufactured on the basis of recycled fibers. For example old corrugated cardboard (OCC) can be used as raw material for the back layer; whereas for example deinked pulp (DIP), or for example more expensive bleached fibril...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F11/04D21F1/00
CPCD21F1/52D21F11/04D21F9/02D21F9/003D21F1/00
Inventor 卡里·雷伊塞宁
Owner METSO PAPER INC
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