Dual-Plastic Expansion Anchor for Solid and Hollow Materials
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Solution Overview
Problem
Existing expansion anchors made of uniform plastic materials struggle to effectively anchor in both solid and hollow building materials, lacking versatility in expansion behavior.
Innovation Solution
The expansion anchor is designed with two base bodies made of different plastics, one reinforced with glass fibers, where the nut section is radially expandable and the expansion arms have varying behaviors to adapt to different anchoring bases, allowing for secure fastening in both solid and hollow materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform plastic material is used for the expansion anchor, then the manufacturing process is simple and cost-effective, but the expansion behavior is insufficient for both solid and hollow building materials
Solution Approach 1:
The expansion anchor uses a composite structure with two different plastic materials: a first plastic for the base body and a second plastic with higher elasticity for the expansion elements. This material combination enables the anchor to exhibit both structural stability and adaptive expansion behavior, allowing it to effectively anchor in both solid and hollow building materials while managing the complexity through a systematic multi-material design approach
2Force
If the expansion elements are made of highly elastic material, then the expansion force is increased, but the structural stability is reduced
Solution Approach 1:
The expansion anchor applies local quality by assigning different material properties to different components: the base body uses a first plastic with structural stability for positional support, while the expansion elements use a second plastic with higher elasticity for generating expansion force. This localized material differentiation allows each component to optimize its function without compromising the overall system stability
3Strength
If the anchor is designed for strong expansion, then the anchoring force in solid materials is improved, but the ability to adapt to hollow materials is reduced
Solution Approach 1:
The expansion anchor implements dynamics by designing expansion elements with higher elasticity that can adapt their behavior based on the anchoring conditions. In solid materials, the elastic expansion elements generate strong expansion forces for firm anchoring, while in hollow materials, the same elements can flex and conform to the cavity shape, providing versatile material compatibility while maintaining strong anchoring capability across different material types
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-plastic design ensures robust anchoring in diverse materials by expanding and bending to fit various conditions, providing a stable hold in both solid and hollow building structures.
Implementation Method 1
The expansion anchor consists of a first base body made of a first plastic and a second base body made of a second plastic. The two plastics differ, in particular in their type, color, strength, and/or fiber content, such as glass fibers, which serve in particular to reinforce the respective plastic.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an expansion anchor 1 made of plastic. In an expansion section 4, the expansion anchor 1 has two expansion arms 9 which extend parallel to a longitudinal axis L in a cantilevered manner and which are connected with their rear ends 11 to the head section 2.