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New hardwood based on high frequency glueless compaction

A high-frequency, hardwood technology, used in pressurized wood treatment, radiation/wave wood treatment, wood heating, etc., can solve the problems of hardwood degumming, paint stripping, easy water absorption and cracking, low hardness, etc., to achieve stable properties and low water absorption , the effect of low content

Active Publication Date: 2022-05-17
王凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The hardwood obtained by the existing surface treatment, heat treatment or compression technology is prone to degumming, paint removal, etc., and its interior is easy to decay, crack, low hardness, easy to absorb water and crack

Method used

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  • New hardwood based on high frequency glueless compaction
  • New hardwood based on high frequency glueless compaction
  • New hardwood based on high frequency glueless compaction

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Embodiment 1

[0045] Embodiment 1 of the present invention provides a new type of hardwood based on high-frequency glue-free compaction, and the average density of the new type of hardwood is 1.25g / cm 3 , the average hardness is 34.1MPa, and the density difference is 0.48g / cm 3 , the difference in hardness is 1.7MPa, and the novel hardwood is obtained by the following preparation method:

[0046] 1) wood pretreatment: pretreat the wood with a density of ρ=0.6, and control the average moisture content of the wood to 10%;

[0047] 2) Heating and compression treatment: use high frequency to maintain the preset heating rate v on the pretreated wood 1 , preset temperature difference ΔT 1 Heating under the condition of heating until the average temperature of the wood is 100°C, keeping it warm for 7 minutes, and compressing at a compression rate of 45%, v 1 =5°C / min, ΔT 1 =4℃, the frequency of high frequency is 6MHz;

[0048] 3) Curing treatment: use high frequency to maintain the preset hea...

Embodiment 5

[0056] Embodiment 5 of the present invention provides a new type of hardwood based on high-frequency glue-free compaction, and the average density of the new type of hardwood is 1.56g / cm 3 , the average hardness is 49.5MPa, and the density difference is 0.25g / cm 3 , the difference in hardness is 0.82MPa, and the novel hardwood is obtained by the following preparation method:

[0057] 1) wood pretreatment: pretreat the wood with a density of ρ=0.6, and control the average moisture content of the wood to 10%;

[0058] 2) Heating and compression treatment: use high-frequency waves in the middle area and surrounding area of ​​the pretreated wood respectively and maintain the preset heating rate v 1 , preset temperature difference ΔT 1 Heating under the condition of heating until the average temperature of the wood is 100°C, keeping it warm for 7 minutes, and compressing at a compression rate of 45%, v 1 =5°C / min, ΔT 1 = 4°C, the frequency of the high-frequency wave in the midd...

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Abstract

The invention provides a new type of hardwood based on high-frequency glue-free compaction, and the average density of the new type of hardwood is 0.82-1.6g / cm 3 , the average hardness is 34‑51.2MPa, and the density difference is less than 0.48g / cm 3 , the hardness difference is less than 1.7MPa, the new hardwood is made through the steps of wood pretreatment, heating and compression treatment, curing treatment, cooling treatment and health treatment, the new hardwood based on high frequency glueless compaction provided by the present invention has a very high Average hardness and average density; uniform distribution of density and hardness, small internal honeycomb structure area, extremely low content of air, resin and tannin compounds; hardwood has low water absorption inside and outside, is not afraid of boiling and water invasion, and has stable properties.

Description

technical field [0001] The invention belongs to the field of hardwood processing and manufacturing, in particular to a new type of hardwood based on high-frequency glue-free compaction. Background technique [0002] Hardwood is hard and dense, with gorgeous color and beautiful and delicate patterns. It is an excellent material for making furniture and wood products, but it grows slowly and has a fine and compact wood structure, so the price of these woods is expensive. The soft wood grows fast, and its interior is composed of many flat cells arranged radially. The cell cavity contains resin and tannin compounds and is filled with air. The texture is light, soft, and elastic, but its physical and mechanical properties are poor, such as low density. , low hardness, easy to shrink and deform, and easy to corrode. In order to improve the above properties of soft wood, it is necessary to carry out surface treatment and heat treatment on the wood; in order to meet the needs of pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K5/00
CPCB27K5/001B27K5/007B27K5/00B27K5/003B27K2240/70
Inventor 王凯
Owner 王凯
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