Coating Sheet Turning Mechanism Relieving Rear Edge Stress
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Solution Overview
Problem
Existing methods for turning coating sheets on a pre-drawing table are either expensive, mechanically complex, or cause damage to the sheets due to bending stress and overloading, leading to inefficient cycle times and risk of breakage.
Innovation Solution
A device with a contact device for the rear edge of the coating sheet that can move upwards and a support device, either mechanical or pneumatic, to lift the sheet and relieve the rear edge, preventing mechanical overload and allowing the sheet to relax freely during turning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trailing edge is gripped by a suction bar and the sheet is folded forward, then the sheet can be turned over, but bending stress is generated in the material which can lead to breakage
Solution Approach 1:
Instead of gripping and folding the trailing edge forward as in prior art, the invention grips the trailing edge and folds it backward over the turning shaft. This inversion of the folding direction eliminates the generation of bending stress in the sheet material, preventing breakage while achieving the turning operation.
2Reliability
If a complex mechanical turning device is used, then the sheet can be turned completely, but the device is uneconomical and cannot achieve short cycle times
Solution Approach 1:
The invention extracts only the essential turning function from complex mechanical systems. By using a simple turning shaft that rotates 180 degrees and a basic gripping mechanism, the device achieves complete sheet turning without the mechanical complexity of prior art systems, enabling economical operation and short cycle times.
3Productivity
If the sheet is folded forward with clamping, then the sheet can be turned, but the rear edge becomes overloaded and may tear or break
Solution Approach 1:
The invention reverses the folding direction so that the trailing edge folds backward over the turning shaft instead of forward. This inversion prevents the rear edge from becoming overloaded during the turning process, eliminating the risk of tearing or breakage while maintaining efficient turning speed.
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 effectively prevents damage to the coating sheet by relieving the rear edge, enabling safe and efficient turning without breaking the sheet, while simplifying the mechanical design and maintaining short cycle times.
Implementation Method 1
a support device is arranged in or below the table plane of the feed table, with which a coating sheet that has not yet been completely turned can be mechanically or pneumatically supported from below
Data Source
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AI summary
A device and a method for turning over a coating sheet (2) placed on a feed table (1) are provided, which reliably eliminate the risk of damage to the trailing edge of a coating sheet (2) or to the coating sheet (2) itself, which is achieved by the device having a contact device for contacting the trailing edge of the coating sheet (2), which is rotatably mounted on a longitudinal guide (4) above the feed table (1) upwards, in the drawing direction (3) and about a transverse axis movable horizontally and transversely to the drawing direction (3), and a support device (5) is arranged in or below the table plane of the feed table (1), which mechanically or pneumatically supports a coating sheet (2) that has not yet been completely turned over in front of its turning shaft (6) which travels with it in the drawing direction (3) in the rear discharge area.