Insulation Anchor With Peripheral Cutting Edges for Hard Plaster
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Solution Overview
Problem
Existing insulation anchors face difficulties in achieving effective retraction behavior when screwed into thermal insulation composite systems with hard plaster layers, as they struggle to penetrate and secure attachments efficiently.
Innovation Solution
The insulation anchor features a hollow shaft with a large-surface insulation thread and a conical drill bit with a secondary thread and peripheral cutting edges, designed to penetrate and grip insulation materials, including those with plaster layers, by generating an axial pull-in force through the secondary thread and facilitating screwing with reduced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional insulation anchor is used, then the structure is simple, but the penetration capability into hard plaster layers is insufficient
Solution Approach 1:
The anchor is divided into functionally distinct segments: a drill bit portion with cutting edges for penetrating hard plaster layers, a secondary thread for initial engagement and pull-in force generation, and a main insulation thread for final anchoring. This segmentation allows each part to specialize in a specific function, improving overall penetration capability while maintaining reasonable structural complexity.
Solution Approach 2:
The drill bit with cutting edges performs preliminary action by creating a pilot hole and clearing debris before the threads engage. The secondary thread then performs preliminary engagement by cutting into the insulation material and generating pull-in force before the main insulation thread fully engages. This sequence of preliminary actions enables successful penetration of hard plaster layers.
2Strength
If a large-surface insulation thread is used, then the axial hold is improved, but the screwing resistance increases
Solution Approach 1:
The secondary thread with smaller diameter performs preliminary action by cutting into the insulation material and generating axial pull-in force before the large-surface insulation thread engages. This preliminary engagement creates a pathway and reduces resistance, allowing the larger insulation thread to engage more easily while still achieving strong axial hold.
Solution Approach 2:
Different portions of the anchor have different thread characteristics optimized for their specific functions: the secondary thread has smaller diameter and coarser pitch for cutting and pull-in force generation, while the main insulation thread has larger surface area and finer pitch for strong axial hold. This local differentiation of qualities allows both requirements to be satisfied.
3Strength
If the anchor is designed for deep penetration, then the grip in insulation material is improved, but the retraction behavior is compromised
Solution Approach 1:
The anchor is segmented into a drill bit portion for deep penetration and debris removal, a secondary thread for initial engagement and pull-in force, and a main insulation thread for deep anchoring. This segmentation allows the anchor to achieve deep penetration and strong grip while maintaining stability through the coordinated action of distinct functional segments.
Solution Approach 2:
The thread parameters change along the length of the anchor: the secondary thread has smaller diameter and coarser pitch for cutting and pull-in, while the main insulation thread has larger diameter and finer pitch for deep anchoring and stable grip. This parameter differentiation enables both deep penetration and stable retraction behavior.
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 design enhances penetration and secure attachment in insulation materials with hard plaster layers by providing improved grip and reduced screwing resistance, ensuring deep axial hold and secure fastening of attachments.
Implementation Method 1
The secondary thread cuts into the insulation material by rotating around its axis, preferably with simultaneous axial feed, and generates an axial pull-in force that increases with increasing axial penetration into the insulation material
Implementation Method 2
The peripheral cutting edge serves to chip or at least separate insulation and, if applicable, a plaster layer applied to the insulation when screwing the insulation anchor into the insulation
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to an insulation anchor (1) for fastening an attachment to an external thermal insulation composite system (ETICS). The invention proposes to design a drill tip (3) of the insulation anchor (1) with two circumferential cutting edges (13) and to provide a smaller diameter secondary thread (14) in addition to an insulation thread (9). The secondary thread (14) begins further forward on the drill tip (3) of the insulation anchor (1) relative to the insulation thread (9). The circumferential cutting edges (13) drill a pilot hole for a hollow shaft (2) of the insulation anchor (1), thereby facilitating the screwing of the insulation anchor (1) into the insulation material. The secondary thread (14) engages the insulation material in front of the insulation thread (9) and pulls the insulation thread (9) into the insulation material, which also facilitates the screwing of the insulation anchor (1) into the insulation material.