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Method and apparatus for contact drying of rotary-peeled or cut wood veneers

A wood veneer and drying technology, applied in lighting and heating equipment, heating to dry solid materials, method combination to dry solid materials, etc., can solve problems such as production efficiency decline

Active Publication Date: 2011-11-23
HELSINKI UNIVESITY OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this considerable extrusion pressure, the veneers are squeezed together and are less productive compared to the convection / hot air dryers described above

Method used

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  • Method and apparatus for contact drying of rotary-peeled or cut wood veneers
  • Method and apparatus for contact drying of rotary-peeled or cut wood veneers
  • Method and apparatus for contact drying of rotary-peeled or cut wood veneers

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Embodiment Construction

[0013] The apparatus for contact drying peeled or cut wood veneers comprises a first belt assembly 3 and a second belt assembly 4 . The first belt assembly 3 comprises a first metal belt 1 and the second belt assembly 4 comprises at least a second metal belt 2 . These belt assemblies 3 and 4 are arranged to receive between them the wood veneer 5 to be dried with the apparatus. To this end, the belt assemblies 3 and 4 extend in parallel for a length spaced at a distance S3 corresponding to the thickness S2 of the veneer. "Wood veneer" or "veneer" refers to a thin-sawn wood panel that has been peeled (ie, helically cut) from a log, or a thin-sliced ​​wood panel that has been parallel-cut (ie, sliced) from a log. In both cases the wood is therefore cut by a blade with an uninterrupted / continuous cutting edge, with which felling enables the veneer to be obtained from the wood with substantially no waste of material, unlike in principle In the case of a saw, a large number of ind...

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Abstract

The present invention relates to an apparatus for contact drying rotary-peeled or cut wood veneers. The apparatus comprises a first belt assembly (3), which comprises a first metal belt (1 ) and a second belt assembly (4), which comprises a second metal belt (2) and a porous screen band (6) or a porous surface section (8) in between the second metal belt and the wood veneer (5). The apparatus comprises heating means (11) for heating the first metal belt (1) to the first temperature (T1 ) and cooling means (12) for keeping the second metal belt (2) at the second temperature (T2), which is about the amount of the difference in temperature (detaT) lower than said first temperature (T1). Further the apparatus comprises pressing means to press the first belt assembly (3) and the second belt assembly (4) towards each other during said heating and cooling whereupon compression pressure (P) is applied to the wood veneer between them. The first belt assembly (3) and the second belt assembly (4) are moved at the same velocity (V) with a control unit (9).

Description

technical field [0001] The invention mainly relates to a method for contact drying peeled or cut wood veneer, in which method fresh veneer with green moisture content is heated and simultaneously pressed to obtain dry veneer. The present invention also relates to apparatus for contact drying peeled or cut wood veneer, said apparatus comprising: a first belt assembly and a second belt assembly, wherein said first belt assembly comprises a first metal belt, a second belt The assembly comprises at least a second metal belt, whereby the belt assemblies are arranged to receive the wood veneer between them; heating means for heating at least the first metal belt to a first temperature; The first belt assembly and the second belt assembly are pressed towards each other during said heating, in which case the wood veneer between them is compressed. Background technique [0002] Currently, drum dryers that work according to the feed-in principle and work on the basis of convection, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B13/10
CPCF26B7/00F26B13/105F26B2210/14F26B3/20
Inventor M·凯里P·阿赫蒂拉
Owner HELSINKI UNIVESITY OF TECH