Chemical Wall Plug Sock Sealing for Controlled Polymerization
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Solution Overview
Problem
Chemical wall plugs face issues with premature polymerization component degradation due to exposure to external conditions, fragile and costly sock materials, and the need for a mechanical fixing method that allows load application before polymerization is complete.
Innovation Solution
A chemical wall plug with a holed tubular jacket and an outer elastically deformable sock that seals the internal housing, made from materials like thermosetting elastomer or thermoplastic elastomer, which can be overmolded onto the jacket to provide a secure and thin seal, allowing for mechanical compression and controlled polymerization component mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external sock is used to cover the holes in the jacket, then the polymerization components are retained inside the jacket, but the sock is fragile and breaks easily during use
Solution Approach 1:
The sealing function and the retention function are merged into a single integrated sock structure that is overmolded directly onto the jacket. This eliminates the need for separate components and reduces fragility by creating a unified structural element.
Solution Approach 2:
The sock is made from an elastically deformable material that combines sealing properties with enhanced mechanical strength. This composite material approach allows the sock to be both flexible enough to seal effectively and strong enough to resist breaking during use.
2Device complexity
If the internal housing is left open at both ends, then the jacket structure is simple, but the polymerization components are exposed to external conditions and degrade prematurely
Solution Approach 1:
A flexible sock made of elastically deformable material is used to seal the internal housing. This thin film structure closes the open ends of the housing, protecting the polymerization components from external conditions while maintaining a relatively simple overall device structure.
3Strength
If a thick sock is used to prevent breaking, then the sock is more durable, but it may not tear properly during compression and prevent polymerization components from exiting
Solution Approach 1:
The sock has non-uniform thickness with localized thin zones positioned at specific locations. These local thin areas are designed to tear preferentially during compression, allowing controlled release of polymerization components while the rest of the sock remains thick and durable for sealing and retention purposes.
4Reliability
If resin injection is used to fix the wall plug, then chemical bonding is achieved, but the injection process is relatively fastidious and time-consuming
Solution Approach 1:
The polymerization components (resin and hardener) are pre-loaded into capsules inside the jacket before the wall plug is installed. This preliminary preparation eliminates the need for on-site resin injection operations, simplifying the installation process while ensuring proper chemical bonding occurs automatically when the capsules break during compression.
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 sealed environment for polymerization components, prevents premature degradation, and enables mechanical fixation before polymerization is complete, improving the reliability and cost-effectiveness of the wall plug.
Implementation Method 1
said sock being made from an elastically deformable material and suitable to be torn at the level of said holes when the wall plug is compressed
Implementation Method 2
a chemical wall plug, comprising: a holed tubular jacket, this jacket defining an internal housing which emerges at each of the longitudinal ends of the jacket; an outer sock which surrounds the jacket and covers the holes of the jacket
Data Source
Figure 1~2
Figure 3~4
AI summary
Wall plug (10), in particular chemical, comprising (i) a holed tubular jacket (12), this jacket defining an internal housing (32) which emerges at each of the longitudinal ends of the jacket, and (ii) an outer sock (40) which surrounds the jacket and covers the holes of the jacket, characterized in that said sock covers a first longitudinal end (18) of the jacket so as to close said internal housing on the side of this first end.