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System for preparing laminated veneer lumber from wooden veneers and laminated veneer lumber preparation method

A technology of laminated veneer lumber and veneer, which is applied in the direction of wood processing appliances, flat products, household components, etc., and can solve problems such as the influence of strength of laminated lumber products, uneven distribution of glue, and substandard product performance

Inactive Publication Date: 2017-06-13
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the sizing treatment is concerned, the quality of the treatment effect will not only directly affect the sizing effect of the subsequent sizing, but also affect the strength of the laminated timber product; and in terms of sizing treatment, the sizing The amount of glue and the uniformity of glue distribution have a direct impact on the quality of laminated veneer lumber: too little glue, the bonding strength of the board is low, resulting in substandard product performance, surface cracks and other quality defects; too much glue , will reduce the mechanical properties of the board; the uneven distribution of sizing will lead to low bonding strength, product performance is not up to standard or cracking and other quality defects
[0004] At present, due to the improper slitting and sizing process, the subsequent preparation of laminated veneer lumber products has low strength and is easy to crack

Method used

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  • System for preparing laminated veneer lumber from wooden veneers and laminated veneer lumber preparation method
  • System for preparing laminated veneer lumber from wooden veneers and laminated veneer lumber preparation method
  • System for preparing laminated veneer lumber from wooden veneers and laminated veneer lumber preparation method

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preparation example Construction

[0029] The preparation system provided by the invention includes a roller press, first drying equipment, glue sizing equipment, second drying equipment, pressing molding equipment and thermal curing equipment. Wherein, the roller press includes two rollers arranged in parallel, and the roller gap is preferably 10-80% of the thickness of the wood veneer, more preferably 50-80%, most preferably 70-77%. In one embodiment provided by the present invention, the roller gap is 1-1.2 mm. In an embodiment provided by the present invention, the two pressure rollers arranged in parallel in the roller press are cylindrical cylinders, and the surface of the cylinders has no gears or threads.

[0030] In the present invention, the first drying device is arranged between the first double-pressing rollers and the sizing device, and is used for drying the veneer after being rolled by the first double-pressing rollers. The present invention does not specifically limit the specific structure of...

Embodiment 1

[0059] Laminated veneer lumber preparation system

[0060] The preparation system provided in this embodiment includes a roller press, first drying equipment, glue sizing equipment, second drying equipment, compression molding equipment and thermal curing equipment.

[0061] Among them, the roller press includes two rollers arranged in parallel. The roller gap is 77% of the thickness of the wood veneer. The two rollers are cylindrical cylinders with no teeth or threads on the surface of the cylinders. The diameter of the cylinders is 150mm. .

[0062] In this embodiment, the first drying equipment is arranged downstream of the roller press, specifically a mesh belt dryer.

[0063] In this embodiment, the sizing equipment is arranged downstream of the first drying equipment, and its structure is as follows: figure 1 as shown, figure 1 Among them, 1 is the first glue spraying device, 2 is the first double pressure roller, 3 is the second glue spraying device, 4 is the conveyi...

Embodiment 2

[0072] Adopt the system that embodiment 1 provides to prepare laminated veneer lumber

[0073] 1) Rotary cutting: use a rotary cutting machine to cut Russian poplar into veneers, the thickness of the veneer is 1.3mm, the width is 250mm, the length is 650mm, and the moisture content is 130±10%.

[0074] 2) One-time rolling: Put the rotary-cut wooden veneer into a rolling machine according to the direction of its fiber transverse grain for rolling. The rotating speed of the lower roller is 20r / min, and the rotating speed of the upper roller is 24r / min. After rolling, a rolled veneer is obtained. After rolling, the veneer is a broom-like mesh structure veneer that does not break in the longitudinal direction and is loose in the transverse direction, such as figure 2 as shown, figure 2 It is a digital photo of the veneer after being rolled by the first double pressure roller provided in Example 2 of the present invention.

[0075] 3) Drying of the veneer: After rolling, the v...

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Abstract

The invention belongs to the field of laminated veneer lumber and particularly relates to a system for preparing laminated veneer lumber from wooden veneers and a laminated veneer lumber preparation method. The system comprises a first double press roller, first drying equipment, gluing equipment, second drying equipment, compression moulding equipment and thermocuring equipment. The first drying equipment and the gluing equipment are arranged at the downstream position of the first double press roller, and the second drying equipment, the compression moulding equipment and the thermocuring equipment are arranged at the downstream position of the gluing equipment. The gluing equipment comprises a first glue spraying device, a rolling and glue spraying device and a conveying device, wherein the rolling and glue spraying device is arranged at the downstream position of the first glue spraying device and comprises the first double press roller and a second glue spraying device arranged at a discharging end of the first double press roller, and the conveying device is used for allowing the wooden veneers dried by the first drying equipment to pass through the first glue spraying device and the rolling and glue spraying device sequentially. The system has advantages that controllability and uniformity in gluing of the wooden veneers can be realized, and accordingly high-strength laminated veneer lumber can be prepared.

Description

technical field [0001] The invention belongs to the field of laminated veneer lumber, and in particular relates to a system for preparing laminated veneer lumber by using wooden veneers as raw materials and a preparation method for laminated veneer lumber. Background technique [0002] Laminated veneer lumber is a new type of wood material made of wood veneer after slitting, gluing and pressing without disturbing the arrangement direction of wood fibers and retaining the basic characteristics of wood. Natural wood texture structure, and has higher strength than logs, and the size specification of the product is also easy to adjust. [0003] In the preparation process of laminated veneer lumber, fibrillation treatment and sizing are extremely important process steps. As far as the sizing treatment is concerned, the quality of the treatment effect will not only directly affect the sizing effect of the subsequent sizing, but also affect the strength of the laminated timber pro...

Claims

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Application Information

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IPC IPC(8): B27N3/14B27N3/08B27N3/18
CPCB27N3/14B27N3/08B27N3/18
Inventor 金太权马韵升柳金章张云奎赵春水刘振学贾波王卫光
Owner CHAMBROAD CHEM IND RES INST CO LTD
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