Dowel Anchoring With Vibration-Cured Mortar in Hollow Materials
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Solution Overview
Problem
Anchoring in objects with low density and/or low mechanical strength, such as those with macroscopic hollow spaces, and dense materials with low ductility poses challenges due to limited anchoring strength and the inefficiency of existing methods like special dowels and curable resins, which are time-consuming and prone to unreliable connections.
Innovation Solution
A method involving the insertion of an insert portion into an opening in the second object, with a hardenable composition between the insert portion and the object, and applying mechanical vibration energy to cause chemical hardening, creating a strong connection by integrating debris and enhancing anchoring strength through interpenetration and adhesive bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If special dowels are used to anchor in hollow bricks, then anchoring is possible despite hollow spaces, but anchoring strength is limited due to limited expansion space
Solution Approach 1:
The patent changes the physical state of the anchoring composition from solid to liquid/pasty during insertion, allowing it to flow and fill hollow spaces effectively. After insertion, the composition hardens to provide strong anchoring. This parameter change enables the composition to adapt to limited expansion spaces while still achieving reliable anchoring strength.
2Strength
If curable resins are used to anchor in dense materials, then strong connection is achieved, but curing takes a lot of time making processes more complicated and expensive
Solution Approach 1:
The patent applies mechanical vibration energy to the anchoring composition during or after insertion. This vibration accelerates the hardening process of the composition, significantly reducing the curing time compared to conventional static resin curing. The vibration energy promotes faster chemical reactions and more rapid strength development, thereby reducing process time and cost while maintaining high connection strength.
3Strength
If curable resins are used for anchoring, then strong connection is achieved, but presence of drill dust or debris causes connection to become unreliable and fail
Solution Approach 1:
The patent converts the harmful effect of drill dust and debris into a beneficial one. The liquid/pasty anchoring composition has the ability to flow around and encapsulate debris particles, incorporating them into the matrix. When the composition hardens, the debris becomes embedded within the solidified material, preventing it from interfering with the bond interface. This eliminates the need for extensive cleaning steps while maintaining connection reliability.
4Reliability
If dowel material is made comparably strong to achieve anchoring, then anchoring strength improves, but expansion into hollow spaces is limited due to material strength
Solution Approach 1:
The patent uses a composition that undergoes parameter changes from liquid to solid state. In liquid form, it can flow and expand deeply into hollow spaces without resistance. After insertion and hardening, it transforms into a strong solid that provides anchoring strength. This sequence allows the material to first achieve deep penetration (overcoming the length limitation) and then provide strong anchoring (overcoming the strength limitation).
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
This method provides efficient anchoring with improved strength and reliability, reducing the need for extensive cleaning and curing time, and is suitable for a wide range of materials, including those with low ductility and density, by utilizing mechanical vibration to enhance the hardening process and interpenetration of structures.
Implementation Method 1
causing mechanical vibration energy to impinge to cause the hardenable composition to undergo a chemical hardening process
Implementation Method 2
cause the hardenable composition to undergo a chemical hardening process to yield a hardened composition
Implementation Method 3
a first connection between the first object and the hardened composition and a second connection between the hardened composition and the second object results
Data Source
AI summary
A method of anchoring a first object in a second object. The second object defines an opening. The first object has an insert portion that defines an insertion axis and has an outer shape that may form an undercut with respect to axial directions. The method includes inserting the insert portion in the opening, with a hardenable composition (prepolymer; mortar) between a wall of the opening and the insert portion, and causing mechanical vibration energy to impinge to cause the hardenable composition to undergo a chemical hardening process to yield a hardened composition, so that a first connection between the first object and the hardened composition and a second connection between the hardened composition and the second object results, whereby the first object is anchored in the second object. The first connection and/or the second connection may include an adhesive connection and/or a positive-fit connection.