Surface-Reinforced Solid Wood Section Material Processing
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Solution Overview
Problem
Existing methods for manufacturing artificial wood products, such as compressed wood, face issues with low density, surface hardness, corrosion resistance, and dimensional stability, leading to poor performance and limited applications, especially under varying weather conditions and moisture exposure.
Innovation Solution
A surface-reinforced solid wood section material is created using a compacted layer and a fiber-connected natural layer with controlled density and moisture content, processed through drying, compression, and carbonization, eliminating the need for chemical agents and enhancing surface hardness and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If water soaking is used to prepare compressed wood, then the wood can be processed and compressed, but the surface contains large amount of water that vaporizes quickly causing internal stress, cracks and rebound
Solution Approach 1:
The patent changes the physical state parameters of water in wood by controlling heating rate and temperature. The heating rate is controlled at 3-5°C/min with temperature maintained between 60-80°C during compression, preventing rapid vaporization and internal stress buildup while still enabling proper compression and drying.
Solution Approach 2:
The patent applies preliminary compression before drying to stabilize the wood structure. The wood is compressed at controlled pressure (0.5-1.5 MPa) while still containing moisture, which prevents rebound during subsequent drying by establishing structural integrity before water removal.
2Reliability
If chemical agents are used to process wood to improve mechanical properties, then corrosion resistance and dimensional stability improve, but water gas/water emissions and noise are produced
Solution Approach 1:
The patent replaces chemical treatment methods with physical field methods. Instead of using chemical agents to improve corrosion resistance and dimensional stability, the patent uses controlled heating fields (3-5°C/min heating rate) and mechanical compression fields (0.5-1.5 MPa pressure) to achieve the same effects without producing harmful emissions.
Solution Approach 2:
The patent enables the wood to self-strengthen through controlled physical processing. The gradual heating and compression process allows the wood structure to naturally densify and stabilize without external chemical agents, eliminating water gas emissions while improving mechanical properties.
3Productivity
If fast-growing artificial wood is used, then yield quantity and harvesting cycle improve, but density, surface hardness and corrosion resistance are low
Solution Approach 1:
The patent applies localized quality enhancement through controlled compression. The compression force (0.5-1.5 MPa) is applied uniformly across the wood surface during the drying process, densifying the surface layer and improving hardness locally while maintaining the overall structure of the fast-growing wood.
Solution Approach 2:
The patent changes the density parameter of fast-growing wood through controlled physical processing. By applying sustained compression (0.5-1.5 MPa) during gradual drying (3-5°C/min heating rate), the wood density and surface hardness are enhanced without changing the fundamental nature of the fast-growing material.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in a product with improved mechanical properties, high corrosion resistance, and stable moisture content, suitable for various weather conditions, with increased yield and reduced environmental impact, making it suitable for applications like solid wood floorboards.
Implementation Method 1
dry the log
Implementation Method 2
compress the log in a hot-press with temperature from 210-250 °C
Implementation Method 3
maintain the temperature of the compressed log for 20-60 minutes
Implementation Method 4
carbonize the compacted layer
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention relates to a solid wood section material and its manufacturing method. This invention is achieved by the following technical plans: a type of surface-reinforced solid wood product, including a compacted layer and a natural layer connected with fibre, has total density of 350-750kg/m3, moisture content 5-12%, corrosion grade >II and weight loss≤24%. This invention is particularly suitable to make floor boards.