Surface-Strengthened Solid Wood Floor Board via Hot Compression
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Solution Overview
Problem
Current methods for manufacturing surface-strengthened solid wood floor boards are complex, environmentally unfriendly, and result in low mechanical strength due to high pollution and process intricacies, particularly in using densification techniques with resin impregnation and hot pressing.
Innovation Solution
A method involving controlled moisture content (7-16%) of log profiles, surface polishing, hot pressing at 220-250°C with 15-25% compression rate, and warm-keeping to achieve a surface-strengthened solid wood floor board with a density of 300-580 kg/m³, reducing rebound and maintaining dimension stability, and eliminating the need for organic resin and inorganic metal elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If organic resin and inorganic metallic elements are used to densify timber surface, then density and hardness of timber surface are improved, but pollution hazard increases significantly
Solution Approach 1:
The invention extracts and eliminates the harmful organic resin and inorganic metallic elements from the densification process, achieving surface hardening through purely mechanical compression and natural wood component transformation, thereby resolving the pollution hazard while maintaining improved hardness
Solution Approach 2:
The invention converts the natural lignin and hemicellulose components of wood, which are normally present but insufficient for hardening, into beneficial strengthening agents through hot compression treatment, transforming the wood's own components into effective hardening agents without external pollutants
2Strength
If resin-impregnated timber is compressed to achieve higher densification, then density and hardness are improved, but process complexity and pollution increase
Solution Approach 1:
The invention removes the resin impregnation step entirely from the process, achieving densification through direct mechanical compression of untreated or minimally treated wood, thereby simplifying the process while maintaining effectiveness
Solution Approach 2:
The invention enables the wood to densify and harden through its own natural components (lignin, hemicellulose) under hot compression, without requiring external resin agents, making the process self-sufficient and simpler
3Ease of manufacture
If sawdust is used as raw material for flooring base, then wood waste is utilized, but mechanical strength deteriorates compared to log fiber
Solution Approach 1:
The invention changes the physical and chemical parameters of the wood material through hot compression treatment, transforming the structural properties of wood fibers or sawdust into a denser, stronger configuration that achieves mechanical strength comparable to or exceeding original log fiber
Solution Approach 2:
The invention creates a composite structure within the wood material itself through hot compression, where lignin and hemicellulose act as natural binding agents between cellulose fibers, forming a strengthened composite that maintains integrity and strength
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 produces a solid wood floor board with a high hardness paint film (2H-8H), stable moisture content (6-9%), and improved mechanical properties, suitable for various climate conditions, reducing installation costs and environmental impact.
Implementation Method 1
put the log profiles into a hot press, make the hot pressing plate of the hot press face the surface to be strengthened, adjust the temperature of the hot pressing plate to 220-250°C
Implementation Method 2
press the log profiles being compressed in the hot press to acquire a compression rate of 15-25%
Implementation Method 3
maintain pressure and perform warm-keeping on the log profiles for 20-40 minutes
Data Source
AI summary
The present invention relates to the technical field of wood processing, in particular to the method for strengthening the wood surface, the profiles and the solid wood flooring of the same. The density of the surface-strengthened solid wood profiles are 300-580Kg/m3 the reinforced surface is 1-5mm thick, the hardness of the paint film of the reinforced surface is 2H-8H, the overall moisture content of the profiles are 6-9%. The hardness of the paint film on the reinforced surface of the inventive solid wood profiles is higher, and the overall moisture content is stable, which is suitable for wider range of climate conditions.