Punching Sheet With Damping Element For Tolerance Compensation
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Solution Overview
Problem
Current punching plates for labeling, especially those used in rotational stamping and in-mould label production, face challenges with high height tolerances and accuracy requirements, leading to reduced service life and poor punching performance due to material inaccuracy and potential damage from misalignment.
Innovation Solution
A punching plate with a damping element on its underside, which is elastically deformable and compressible, reduces forces on cutting edges during 'hard-on-hard' punching, allowing for precise punching of thin PET substrates by compensating for tolerances and reducing rolling movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the punching plate is used for hard-on-hard punching of thin PET substrates, then the punching precision is improved, but the service life of the punching plate is reduced due to damage of cutting edges
Solution Approach 1:
A damping element is arranged on the underside of the base plate before punching operations occur. This damping element absorbs and reduces the forces acting on the cutting edges during hard-on-hard punching of thin PET substrates, preventing damage before it occurs and extending the service life of the punching plate while maintaining punching precision
Solution Approach 2:
The damping element acts as an intermediary between the base plate and the punching lines. It mediates the force transmission during punching, reducing the direct impact forces on the cutting edges while allowing precise punching of thin materials to proceed effectively
2Reliability
If the distance between punching and counter-punching cylinders is reduced to prevent carrier damage, then the risk of injury to PET carrier is reduced, but the punching edges become damaged due to excessive force
Solution Approach 1:
The damping element is pre-installed on the base plate to cushion the impact forces during punching. This allows the cylinders to be positioned closer together without damaging the carrier, while the damping element prevents excessive forces from damaging the cutting edges by absorbing the excess energy
3Ease of manufacture
If the base plate thickness is reduced to lower costs, then the manufacturing cost is reduced, but the stability and tolerance compensation capability are worsened
Solution Approach 1:
The damping element serves as an intermediary that compensates for the reduced structural mass of a thinner base plate. It provides the necessary stability and tolerance compensation capability that would otherwise require a thicker base plate, allowing cost reduction through thinner material while maintaining performance
Solution Approach 2:
Instead of changing the base plate thickness parameter to achieve stability, the invention changes the damping element properties (material, thickness, compression characteristics) to provide the necessary stability and tolerance compensation, allowing the base plate to be thinner while maintaining system performance
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 damping element extends the service life of punching plates by adapting to local and temporal tolerances, enabling precise punching of thin materials and reducing the risk of damage, while also allowing for cost savings by reducing the base plate thickness.
Implementation Method 1
Due to its damping properties, this damping element reduces the forces acting on a cutting edge or edge of a punching line during 'hard-on-hard' punching
Implementation Method 2
The damping element can then be adjusted so that the layers to be punched are punched, but the damping element is compressed when it hits the harder carrier layer
Data Source
Figure 1~2
Figure 3~5
AI summary
Disclosed is a punching sheet for punching tags or labels, comprising a main sheet (2), on the top face of which at least one punching line (4) is provided, and in at least some areas of a bottom face (3) of which at least one damping element (14) is arranged. Also disclosed is a process for manufacturing a punching sheet.