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Forward wood laminated timber production process and impact device

A production process and technology of laminated lumber, applied in the direction of wood processing equipment, wood veneer joining, manufacturing tools, etc., can solve the problem that broken veneer or lumber waste can not be fully utilized, and the processing process of silk strips is complicated. , low strength-to-weight ratio of composite boards, etc., to achieve the effects of rich and beautiful texture and color, strong process order and light weight

Active Publication Date: 2014-02-26
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of industrial technology, the requirements for the form of raw materials are getting higher and higher. If a good production method is not found, the broken veneer or lumber waste cannot be fully utilized.
[0004] Nowadays, there are some patent application technologies that also use leftover materials (such as bamboo scraps, etc.) to make finished boards. They generally process raw materials into chips or use a rack decomposer to decompose them into strands before sizing. , Pavement and hot pressing molding, the defects are: the debris has seriously damaged the shape of the raw materials, the amount of adhesive sizing is large, and the strength-to-weight ratio of the prepared composite board is low; the processing process of the flaking filaments is complicated, and the amount of dipping is large ; There is still a contradiction between the cost and performance of materials

Method used

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  • Forward wood laminated timber production process and impact device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Choose the residue of Chinese fir wood sawing processing - fir bark as raw material, dismantle it into side strips with a width of 20-30mm and a thickness of 2-3mm, and screen the strips with a length of more than 300mm for utilization. Then, immerse the dried wood edge strips in the modified phenolic resin glue solution with a solid content of 20%. After all the edge strips are soaked in the glue solution, take out the edge strips and drain them, and further dry them to a moisture content below 12%. . Then spread the wood strips after dipping and drying evenly in a mold according to the grain direction of the strips, and then put the mold with the blank into the hot press for hot pressing, and press according to the following hot pressing process parameters: hot pressing temperature 130°C, hot pressing pressure 4MPa, hot pressing time 2min / mm, formed density 0.80g / cm 3 board square timber. After trimming and sanding, the pressed planks are trimmed to the required size...

Embodiment 2

[0042] Choose the residue from the sawing process of eucalyptus wood - Chinese fir bark as the raw material, gather it up and bundle it, then impact it, break it into side strips with a width of 20-30mm and a thickness of 2-3mm, and screen the strips with a length of more than 300mm for use . The specific subsequent processing steps are similar to those in Example 1.

Embodiment 3

[0044] Select various discarded veneers produced in the production of poplar plywood, cut the veneer strips into veneer strips with a width of 15-30mm with a cutter, and screen out wood chips with a length greater than 300mm for utilization. According to the production conditions of Example 1, the selected veneer strips are dipped, dried, paved, and hot-pressed in a four-sided press, using a hot-pressing temperature of 140 ° C, a hot-pressing pressure of 3 MPa, and a hot-pressing time of 3 min / mm. The forming density is 0.75g / cm 3 square material. The pressed square material is finished by cutting, sanding and other post-finishing methods.

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Abstract

The invention discloses a forward wood laminated timber production process and a device thereof. The process includes sequentially performing processes fo raw material selection, material ease, sizing, pavement, hot forming and after arrangement, and finally obtaining plates or timbers. The raw materials are wood peels or plywood crushed veneers. In the process of material ease, the wood peels are eased to from wood strips with certain cross section size and length through an impact device, or the plywood crushed veneers are cut with the fixed width and screened to from wood strips with certain cross section size and length. In the process of pavement of the forward wood laminated timber production process, dipped and dried wood strips are evenly paved in the grain direction, are fed into a machine, and are pressed and controlled from all sides, and plate blanks with preset size are obtained. By the aid of the process, high-performance application of waste material can be realized to an utmost extent.

Description

technical field [0001] The invention relates to a production technology of boards, in particular to a production process and equipment of forward-strip laminated lumber. Background technique [0002] With the reduction and protection of forest resources, the wood processing industry mainly uses artificial secondary forests for processing and utilization. After years of development, the materials used in modern wood structure buildings are no longer limited to wood-based lumber. Laminated veneer lumber (LVL), glued wood (Glulam), oriented strand board (OSB), and forward wood Structural composite lumber, such as strip-laminated lumber (PSL), has partially replaced gauge lumber and prepared various building components for use in wood structures. Among them, parallel strand lumber (PSL) can be prepared and processed with smaller-sized wood or shredded veneer. During the processing of raw materials, defects such as scars and cracks are removed, which not only improves the qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08
Inventor 高黎王正任一萍郭文静常亮
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY