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Mechanically glued veneer, its manufacture method and equipment

A kind of equipment, technology of sawdust, applied in the field of mechanical plywood of wood and its manufacture and equipment, can solve the problem of glue loss, etc., achieve the effect of short extrusion time, pollution problem and related cost reduction

Inactive Publication Date: 2010-11-03
LIGNUM TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the problem is that part of the glue is lost through temperature treatment in the actual process.

Method used

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  • Mechanically glued veneer, its manufacture method and equipment
  • Mechanically glued veneer, its manufacture method and equipment
  • Mechanically glued veneer, its manufacture method and equipment

Examples

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Embodiment Construction

[0070] Such as figure 1 Shown by the arrow 3 in the shavings, the dry fibers made of shavings are conveyed to the weighing belt conveyor 1 through the opening of the housing 4 . The ramp 5 guides the arriving fibers onto the belt of the weighing belt conveyor. The weighing belt conveyor measures and controls the amount of material conveyed towards the three rollers 6 directions. Three rolls 6 are arranged up and down and alternately in turn, and they form an acute angle α with the weighing belt conveyor 1 . The fibers on the weighing belt conveyor 1 arrive within this acute angle. They pass through rotating rolls 6 . In the meantime, a thin layer is formed from the fibers, which is conveyed vertically further downwards in the direction of arrow 7 due to gravity. The thin layer thus enters the mixer 2 , in particular between the nozzles 8 and the tool 9 .

[0071] The mixer consists of a tubular housing. The housing consists of double walls 10 and 11 . A shaft 12 is arra...

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PUM

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Abstract

The invention relates to a production method and a corresponding device for a board made of fibers or chips and to a board produced according to said method. The invention relates particularly to an MDF or HDF or a chip board. The aim of the invention is to provide a board having a low glue content in comparison with prior art. According to the invention, this is achieved in that the fibers or chips are first dried. The dried fibers or chips are then mixed with glue at temperatures substantially below drying temperatures, i.e. especially below 100 DEG C. This prevents the glue from being undesirably exposed to relatively high temperatures occurring during drying. The resulting board has a relatively low glue content.

Description

technical field [0001] The invention relates to a method of manufacturing a board made of fibers and wood chips, a corresponding device, and a board manufactured by this method. In particular the invention relates to MDF boards, HDF boards or particle boards. Background technique [0002] A typical, known production method for the manufacture of boards of the type mentioned at the outset is carried out as follows: The cooked shavings used to manufacture boards made of fibers are first fed to a rolling mill. In this rolling mill the shavings are processed into fibers, in particular under conditions of exerted temperature and pressure, by means of mold discs. The fibers are sent from the roller press by means of steam and are conveyed onward by means of a pipe called the "blue line". The steam pressure here is approximately 10 bar. The temperature is about 150 to 160°C. Glue is added to the "blue line". After adding glue, the "blue line" expands immediately. As this expa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/08B27N1/02
CPCB27N1/02
Inventor 约瑟夫·施图茨
Owner LIGNUM TECH AG
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