Composite Profile Reinforcing Strips Angled Sections
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Solution Overview
Problem
Extruded plastic profiles used in windows face challenges with dimensional stability due to weight and wind pressure, requiring reinforcement to minimize deflection, which is often achieved through separate work steps increasing costs.
Innovation Solution
A composite profile with at least two reinforcement strips made from thermoplastic material with embedded continuous glass and/or mineral fibers, featuring angled sections and strategically placed to maintain a specific distance from the outer wall, enhancing flexural rigidity and surface quality, and utilizing spacers and connecting layers for improved connection with the plastic matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If separate reinforcement steps are used to improve dimensional stability, then bending stiffness is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention combines the reinforcement strips and the plastic profile into a single integrated composite profile that is extruded in one continuous process. The reinforcement strips are embedded within the plastic material during extrusion, eliminating the need for separate reinforcement steps and reducing manufacturing complexity while maintaining the required bending stiffness.
Solution Approach 2:
The invention uses composite materials consisting of thermoplastic material with embedded continuous glass and/or mineral fibers as reinforcement strips. These composite reinforcement strips provide the necessary mechanical strength and bending stiffness while being integrated into the plastic profile through a single extrusion process.
2Strength
If reinforcement strips are placed close to the outer surface to improve mechanical properties, then bending stiffness increases, but surface quality deteriorates
Solution Approach 1:
The invention applies local quality by creating an asymmetric cross-section where the reinforcement strips are positioned at different distances from the outer surface. At least one reinforcement strip has an angled section that places it closer to the outer surface to maximize bending stiffness, while other regions maintain appropriate spacing to preserve surface quality. This localized positioning optimizes mechanical properties without compromising overall surface quality.
3Stability of the object's composition
If reinforcement strips are positioned far from the center of gravity axis to increase section modulus, then dimensional stability improves, but manufacturing precision requirements increase
Solution Approach 1:
The invention uses preliminary action by incorporating spacers within the mold during the extrusion process. These spacers pre-position the reinforcement strips at the optimal distance from the center of gravity axis before the plastic material is extruded around them. This ensures precise positioning and maximizes the section modulus for dimensional stability while simplifying the manufacturing process.
4Strength
If angled sections are added to reinforcement strips to increase bending stiffness, then mechanical properties improve, but device complexity increases
Solution Approach 1:
The invention applies curvature by introducing angled sections into the otherwise linear reinforcement strips. These angled sections increase the bending stiffness of the reinforcement strips by creating a more complex geometric configuration that better resists bending forces. The angled sections are integrated into the extrusion process, allowing the complex shape to be manufactured efficiently.
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 solution provides a dimensionally stable and aesthetically superior composite profile with enhanced mechanical properties, reducing deflection and internal stresses, while maintaining surface quality and allowing for efficient stress distribution, thus reducing overall window costs.
Implementation Method 1
During corner welding of the windows, this matrix softens, allowing the reinforcing fibers to move laterally during the formation of the weld seam and the associated shortening in the area of the end faces. They can also penetrate each other at the end faces, effectively welding the reinforcing strips themselves together.
Data Source
Figure 1~1B
Figure 2~2B
Figure 3
AI summary
The invention relates to a composite profile made of plastics, designed as a hollow profile with at least two reinforcing strips arranged in the interior, characterized in that the at least two reinforcing strips (1A, 1B) are formed at least partially of thermoplastic plastic with embedded continuous glass and/or mineral fibers and/or other reinforcing fibers, and at least one of the reinforcing strips (1A, 1B) has at least one angled section (5A, 5B) parallel to the longitudinal axis of the composite profile (10), wherein the distance (A) between the at least two reinforcing strips (1A, 1B) and the respective adjacent outer walls (11) of the composite profile (10) in the region of the non-angled section corresponds to 0.1 to 3 times the wall thickness (D) of the outer wall (11). The invention also relates to a reinforcing strip for a composite profile and to a method for producing a composite profile.