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Processing method of compression-enhanced fast growing wood

A processing method and fast-growing wood technology, applied in wood processing equipment, wood compression, wood treatment, etc., can solve the problems of reducing springback rate, bubbling, wood springback, etc., to improve hot pressing efficiency, shorten process time, The effect of accelerated drying and molding

Inactive Publication Date: 2020-06-19
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Softening treatment is required before compression. The most environmentally friendly and common physical softening method is hydrothermal treatment or steam. After treatment, the elastic modulus of the material is greatly reduced and the plasticity is increased. The densification of wood is achieved under pressure, but the wood The water in the wood cannot be discharged, and after the pressure is relieved, under the action of the residual stress, the wood will have defects such as rebound or bubbling, and the water content in the wood after treatment is high, which will affect the use of the final product
By prolonging the hot pressing time or carbonization treatment, the rebound rate after compression can be reduced, but the process takes a long time, the production efficiency is low, and the production cost is high

Method used

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  • Processing method of compression-enhanced fast growing wood
  • Processing method of compression-enhanced fast growing wood
  • Processing method of compression-enhanced fast growing wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like figure 1 As shown, a kind of processing method of compressing and strengthening fast-growing wood of the present embodiment comprises the following steps:

[0035] S1: End capping: Dry and saw the fast-growing wood specimen after moisture content balance treatment, and use polypropylene wax to seal the surroundings of the fast-growing wood specimen (referring to the side wall and two ends of the fast-growing wood specimen, and the upper and lower surfaces are not exposed). Capping, for steam exhaust) capping; In the present embodiment, fast-growing wood is poplar, and the moisture content of fast-growing wood before capping is 12%-14%, and capping helps reduce the moisture of fast-growing wood, reduces heat pressure time.

[0036] S2: Boiling and softening: Boil and soften the fast-growing wood specimens with 100°C water for 20 minutes; use boiling water for surface softening to shorten the softening time and improve the softening efficiency.

[0037] In other em...

Embodiment 2

[0053] This embodiment is roughly the same as Embodiment 1, except that the pressing plate 1:

[0054] Different from Embodiment 1, the pressing plate 1 is composed of an inner pressing plate 11 and an outer pressing plate 12, and is a composite plate. The pressing plate 1 of this embodiment is a single plate, such as Figure 7-9 as shown, Figure 8 The middle arrow shows the pressure direction.

[0055] The release hole 111 is opened on one side of the pressing plate 1 and is set close to the side of the fast-growing material specimen, and the groove 121 is opened on the other side of the pressing plate 1 and is set away from the side of the fast-growing wood specimen.

[0056] Dimensions of the pressure plate 1 in this embodiment: format: 500×500×3mm (length×width×thickness), groove 121: 500×2×1.5mm (length×width×depth) interval 5mm, release hole 111 diameter 1mm, interval 5mm. The cross section of the groove 121 in this embodiment is rectangular.

[0057] The pressure p...

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Abstract

The invention discloses a processing method of compression-enhanced fast growing wood. The processing method comprises the following steps: S1, a pretreated fast growing wood test piece is softened; and S2, the fast growing wood test piece is placed into a hot-pressing die for hot-pressing shaping treatment, and after pressure relief cooling, the compression-enhanced fast growing wood is obtained.The hot-pressing die comprises two symmetrically-arranged pressing plates, the fast growing wood test piece is located between the two pressing plates, the upper surface and the lower surface of thefast growing wood test piece directly make contact with the two pressing plates correspondingly, a plurality of releasing holes are formed in the surface, close to the fast growing wood test piece, ofeach pressing plate, the other ends, in the direction away from one side of the fast growing wood test piece, of the releasing holes communicate with grooves, and water on the surface of the fast growing wood test piece is discharged into the grooves through the releasing holes. Operation is easy, and the water of the compressed wood can be quickly released.

Description

technical field [0001] The invention relates to the field of furniture, in particular to a processing method for compression-enhanced fast-growing wood. Background technique [0002] Compression densification is a commonly used strengthening method for fast-growing wood. Softening treatment is required before compression. The most environmentally friendly and common physical softening method is hydrothermal treatment or steam. After treatment, the elastic modulus of the material is greatly reduced and the plasticity is increased. The densification of wood is achieved under pressure, but the wood The moisture in the treated wood cannot be discharged, and after the pressure is relieved, the wood will have defects such as rebound or bubbling under the action of residual stress, and the water content in the treated wood is high, which affects the use of the final product. By prolonging the hot pressing time or carbonization treatment, the rebound rate after compression can be r...

Claims

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Application Information

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IPC IPC(8): B27M1/08B27M1/02B27K5/06B27K5/00
CPCB27K5/0085B27K5/06B27M1/02B27M1/08
Inventor 郝景新金秀李贤军吴新凤
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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