Composite Door Frame Bonding for Dimensional Stability
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Solution Overview
Problem
Higher-grade wood used for door frames and stops is expensive and lacks dimensional stability, leading to installation challenges due to variability in frame dimensions.
Innovation Solution
A composite frame structure using first and second members made from varying materials, coated with a bonding agent like polyvinyl acetate, which facilitates integration and stability, allowing for consistent frame dimensions despite irregular shapes and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If higher-grade wood is used for door jambs and stops, then the material strength and appearance quality are improved, but the cost increases and dimensional stability deteriorates
Solution Approach 1:
The patent applies composite materials by combining wood fibers or particles with binding agents to create engineered wood products (such as MDF, particleboard, or laminated veneer lumber) for door jambs and stops. This composite approach maintains the aesthetic and structural benefits of wood while significantly improving dimensional stability by reducing natural variability in moisture content and grain patterns that cause warping and shrinking in solid wood.
2Strength
If higher-grade wood is used for door jambs and stops, then the material strength is improved, but the cost increases
Solution Approach 1:
The patent changes the physical and chemical parameters of the wood material by processing it into composite forms with controlled density, moisture content, and molecular structure. This allows the use of lower-grade or faster-growing wood species that can be engineered to match or exceed the strength properties of premium hardwoods, thereby reducing material cost while maintaining structural performance.
3Adaptability or versatility
If varying materials with irregular shapes are used, then the adaptability to different opening shapes is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-fabricating door jambs and stops from composite materials with precisely controlled dimensions and pre-attached hardware components (such as pre-installed hinges, locks, and weatherstripping channels). This advance preparation ensures that even though the final product can be customized for various opening shapes and sizes, the core components are manufactured with high precision before installation, eliminating dimensional variability during the installation process.
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 composite frame provides dimensional stability and cost-effectiveness by bonding irregular materials, reducing waste and installation issues while accommodating various opening shapes.
Implementation Method 1
A composite frame structure using first and second members made from varying materials, coated with a bonding agent like polyvinyl acetate, which facilitates integration and stability
Data Source
AI summary
In accordance with one or more embodiments, a frame for an opening includes a first member, a second member, and a coating that is capable of facilitating bonding between the first member and the second member and also is capable of facilitating dimensional stability of the frame.