Ceramic Plate Fixing With Undercut Clips
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Solution Overview
Problem
Ceramic plates used in paper production systems face challenges due to their high hardness, limited dimensions, and susceptibility to fracture, leading to increased risk of damage and fracture when fixed to carrier strips, with existing fixing methods failing to ensure flat surfaces and adequate fracture resistance.
Innovation Solution
The solution involves forming ceramic plates with strips projecting from their surface, featuring lateral undercuts, and using resilient U-shaped clips with free ends that project into these undercuts, exerting compressive forces and avoiding cutouts that reduce fracture resistance, thereby ensuring even alignment and preventing projecting edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If ceramic plates are fixed to carrier strips using connecting elements that extend over butt joints, then the plates are kept at the same height and projecting edges are avoided, but the plates are loaded in tension or flexure increasing the risk of fracture
Solution Approach 1:
Instead of using connecting elements that extend over the butt joints to bridge the plates (which causes tensile loading), the patent inverts the approach by using clips that attach to the carrier strip and exert compressive force on the plates from below. This reverses the loading direction from tensile/flexural to compressive, thereby maintaining plate alignment while reducing fracture risk.
Solution Approach 2:
The carrier strip acts as an intermediary element between the clips and the ceramic plates. The clips are anchored in the carrier strip and transmit compressive forces to the plates through the undercut strips, rather than directly bridging the plates with connecting elements. This intermediary mechanism allows for alignment while avoiding direct tensile loading of the plates.
2Ease of manufacture
If cutouts are provided in the plates for fixing, then the plates can be attached to the carrier strip, but the thickness of the plates is reduced and fracture resistance is lowered
Solution Approach 1:
The fixing mechanism is segmented into separate components: clips that are anchored in the carrier strip and strips that project from the plates. The clips engage with the undercut strips to provide fixing without requiring cutouts in the plates themselves. This segmentation allows the plates to maintain their full thickness and strength while still achieving secure attachment.
Solution Approach 2:
The undercut strips projecting from the plates serve as an intermediary element between the clips and the plate body. These strips provide the necessary engagement surface for the clips without requiring large cutouts in the plates, thereby maintaining plate thickness and fracture resistance while enabling secure fixing.
3Ease of manufacture
If plastic material is used to fix plates to carrier strips, then the plates can be attached, but thermal expansions cause the flat surface to be compromised
Solution Approach 1:
The clips serve as a rigid intermediary element between the carrier strip and the ceramic plates, eliminating the need for plastic fixing material. The clips are anchored in the carrier strip and engage with the undercut strips to provide secure attachment without the thermal expansion issues associated with plastic materials, thereby maintaining the flat surface precision of the plates.
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 configuration enhances the fracture resistance and alignment of ceramic plates, reducing the risk of damage and fracture by distributing compressive forces evenly and maintaining the plates' thickness, ensuring a stable and durable assembly for paper production systems.
Implementation Method 1
the free ends of the clips, which are oriented toward one another, projecting into the lateral undercuts of the strips projecting from the plates
Data Source
AI summary
A foil for paper production systems has a carrier strip and mutually adjoining plates of ceramic material. The plates are fixed to the carrier strip by way of a plurality of clips, whose free ends are latched to the plates. On their side facing the carrier strip, the plates of a ceramic material are formed with strips projecting from the latter and extending in the longitudinal direction of the carrier strip, which are formed with undercuts along their side edges, the free ends of the clips, which are oriented toward one another, projecting into the lateral undercuts of the strips projecting from the plates.