Method for manufacturing glue-less fiber board by leak-free type hot pressing technology

A hot-pressing process and fiberboard technology, applied in the direction of manufacturing tools, flat products, wood processing appliances, etc., can solve the problems that have not been applied in actual production, and achieve the effect of small process reform, good effect and low density

Inactive Publication Date: 2005-08-17
ZHEJIANG FORESTRY UNIVERSITY
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Problems solved by technology

This patented technology has not been applied to actual production due to some of the above-mentioned deficiencies

Method used

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  • Method for manufacturing glue-less fiber board by leak-free type hot pressing technology

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Embodiment 1

[0016] Embodiment 1: In this example, the method for manufacturing glue-free high-density fiberboard with a closed hot pressing process is:

[0017] Using wood as raw material, glue-free high-density fiberboard is produced on the existing medium-density fiberboard production line.

[0018] 1) Fiber separation and water repellent: Chip the wood on a chipper, separate the fibers according to the MDF production process and apply paraffin water repellent, the amount of which is 0.8% of the dry fiber mass.

[0019] 2) Drying and paving: the hot-milled fibers are dried by pipeline air-flow drying method, and the moisture content is controlled at 18%;

[0020] 3) Pre-pressing: the process is the same as that in the existing medium density fiberboard production.

[0021] 4) Airtight hot pressing: send the pre-pressed slab into the airtight frame (rectangular shape made of steel with a thickness of 6.0mm and a rectangular cross-sectional shape, the airtight frame is fixed on the upper...

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Abstract

The present invention is sealed hot pressing technological process of producing no-glue fiber board with wood, bamboo or herbaceous plant as material, and solves the technological problems of lowering hot press pressure and expanding the product thickness and density range. The technological process includes the steps of: separating the material into wet fiber and applying paraffin emulsion; drying and spreading; pre-pressing; sealed and heated pressing the board blank inside sealing frame in a hot press to form the no-glue fiber board. The hot pressing step consists of hydrolysis section, air exhausting section and plasticizing section, and the sealing frame is heat resistant and airtight and in the shape of formed board.

Description

technical field [0001] The invention relates to the field of producing glue-free fiberboards using wood (bamboo) or herbaceous plants as raw materials, in particular to a method for manufacturing glue-free fiberboards by a closed hot pressing process. Background technique [0002] Chinese patent document CN1108988A discloses "a production method of dry-process glue-free hard fiberboard", which separates and dries plant raw materials, forms them under the condition of not applying synthetic resin, and hot-presses them to obtain a wood-based panel. Seen from the embodiment of this patent, this technology is only limited to adapting to the manufacture of dry-process adhesive-free hard fiberboard (the board density is all greater than 1.0g / cm2 substantially) 3 ), cannot be used in the production of dry-process glue-free medium density fiberboard (the density range of medium density fiberboard is 0.45 ~ 0.88g / cm 3 ). The standard adopted by this technology is the national stand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N3/08
Inventor 金春德
Owner ZHEJIANG FORESTRY UNIVERSITY
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