Dual-Layered PVC Extrusion Frame for Fire Resistance and Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Closure frames made of solid wood offer high shock and sound absorption but low fire resistance, while plastic frames provide reasonable mechanical strength and fire resistance but compromise on mechanical strength due to hollow structures, necessitating an enhancement for both properties at a reasonable cost.
Innovation Solution
An extrusion component for closure frames with a dual-layered structure, where the inner layer is formed from foamed PVC with added materials like magnesium hydroxide, zinc borate, and Diatomaceous earth, and a reinforcement insert, such as wood, is used to enhance mechanical strength and fire resistance, integrated with an outer PVC layer for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If solid wood is used for closure frames, then shock and sound absorption abilities are improved, but fire resistance capability deteriorates
Solution Approach 1:
The invention uses a composite structure consisting of an outer plastic layer (PVC) and an inner foam core layer, creating a material combination that achieves both shock/sound absorption and fire resistance. The foam core provides cushioning while the plastic outer layer and fire retardant additives ensure fire safety, resolving the contradiction between mechanical comfort and fire protection.
Solution Approach 2:
The invention modifies the physical and chemical parameters of the plastic material by adding fire retardant additives (such as magnesium hydroxide, aluminum hydroxide) and creating a foamed structure. This transforms ordinary plastic into a fire-resistant composite material that maintains shock absorption while achieving fire resistance capability.
2Reliability
If plastic hollow structure is used for closure frames, then fire resistance capability is improved, but mechanical strength deteriorates
Solution Approach 1:
The invention applies different material properties to different parts of the frame structure. The outer plastic layer provides fire resistance and weather protection, while the inner foam core provides mechanical strength and shock absorption. This local differentiation of material qualities allows each layer to optimize its function, achieving both fire resistance and mechanical strength.
Solution Approach 2:
By combining plastic and foam materials in a layered composite structure, the invention achieves mechanical strength comparable to or exceeding solid wood, while maintaining fire resistance. The composite structure distributes stresses effectively and prevents the weaknesses of hollow structures.
3Strength
If wooden blocks are inserted into hollow interior, then mechanical strength is improved, but fire resistance capability deteriorates
Solution Approach 1:
The invention replaces permanent wooden blocks with a foam core that is integrated into the plastic structure. The foam core provides mechanical strength without the fire safety issues of wood, and can be easily manufactured as part of the extrusion process, eliminating the need for separate wooden inserts.
Solution Approach 2:
The foam core material serves as a fire-safe alternative to wooden blocks, providing both mechanical strength and fire resistance. The foam structure distributes loads effectively while being inherently fire-resistant, eliminating the contradiction between strength enhancement and fire safety.
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 dual-layered structure achieves 30-40 minutes of fire resistance and sound insulation, thermal insulation, and increased hardness, effectively addressing the shortcomings of both solid wood and plastic frames by synergistically improving structural and chemical constituents.
Implementation Method 1
the inner layer is formed from polyvinyl chloride (PVC) and a foaming agent
Implementation Method 2
the inner layer further includes a material selected from a group consisting magnesium hydroxide, zinc borate, calcium phosphate and Diatomaceous earth
Implementation Method 3
achieves 30-40 minutes of fire resistance and sound insulation, thermal insulation
Implementation Method 4
the reinforcement insert is in attachment with the inner layer by way of adhesive
Data Source
AI summary
An extrusion component of a closure frame for defining an opening which is closable by a closure member and a method of making the same. The extrusion component comprises an elongate body having first and second sides, at least one of which is shaped for accommodating said closure member. The elongate body includes an outer layer integrally formed with an inner layer and the inner layer has an outer surface correspondingly shaped by or with an inner surface of the outer layer.