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Lightweight wood material board

A wooden and light-weight technology, applied in flat products, wood processing appliances, household components, etc., can solve the problems of high volume density, high power and heat consumption, large-scale use of machines, high volume density, and large material consumption

Active Publication Date: 2012-10-03
KRONOPLUS TECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, relatively large amounts of material need to be used to manufacture wood chip plywood, which in the case of three-ply panels leads to high bulk densities
However, for the manufacture of such three-layer boards, in addition to high weight and material consumption, high bulk density also requires high electrical and thermal energy consumption and large-scale use of machines

Method used

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  • Lightweight wood material board
  • Lightweight wood material board
  • Lightweight wood material board

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] The industrial spruce logs are cut into thin wood chips with a length of about 30 mm by a knife shaft cutter. The spruce chips are cut into thin chips with a length of up to 35 mm by a knife ring cutter. Using a crusher, the spruce chips were further crushed into narrow crushed chips with a thickness of about 1.5 mm. 20% of the crushed wood chips were mixed with 40% of the wood chips made by the knife shaft cutter and 40% of the wood chips made by the knife ring cutter and dried. The fine-grained material contained in the mixture and the sawdust also contained in the mixture were separated by a vibrating sieve having a mesh width of 0.8 mm. The wood chip material from which sawdust and fine material have been removed is covered with 4% Polymeric methylene diphenyl diisocyanate (PMDI) glue (adhesive) relative to the mass of the wood chip. The glued wood chips are formed into a single-layer wood chip mat by a dispersing head, which is then compacted using a continuous d...

example 2

[0047] As in Example 1, but during dispersal of the chip mat, only thin and flat chips and no thick crushed chips reach the upper and lower sides of the chip mat by adjusting the dispersing rollers. After compacting the chip mat, the lightweight single-ply board thus produced has a very uniform surface free of small depressions. The material property values ​​correspond to the values ​​shown in the table below for the lightweight single-ply panels made of wood according to the invention. At the same time, the covering of the wood chips with PMDI glue and the compacting of the dispersed wood chip pieces were carried out on a continuous double-belt press.

example 3

[0049] As in Example 1, but using willow logs and willow chips instead of spruce logs and spruce chips.

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Abstract

The invention relates to a lightweight wood material board which is constructed as a single layer and which is characterized in that said board has an apparent density under 500 kg / m<3> and consists of a mixture of crushed pulp and wood shavings. The invention further relates to a method for producing such a lightweight wood material board that is constructed as a single layer.

Description

technical field [0001] The present invention relates to a kind of with less than 500kg / m 3 Lightweight single-ply wood boards with a bulk density and are characterized by a mixture of crushed and thinly sliced ​​wood chips. The invention also relates to a method for the manufacture of such lightweight single-layer wooden panels. Background technique [0002] Traditional chipboards usually have a three-layer structure to ensure good coating properties. In the middle layer, slightly larger wood chips are thus used, while in the outer layers, usually smaller wood chips are used which create a broad continuous surface. [0003] As wood chips are continuously processed to form fuel pellets, there is also a constant need to manufacture small wood chips from round logs. A large amount of energy is therefore required to manufacture smaller wood chips made from wood. In addition, these smaller wood pieces require more bonding due to their small size. [0004] In order to achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/00
CPCB27N3/00B27N3/005Y02E50/10Y02E50/30C08L97/02
Inventor 安德列亚斯·米哈尼克尔
Owner KRONOPLUS TECHN