Cardboard Pretreatment Creasing for Fast Thick-Board Laser Cutting
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Solution Overview
Problem
Existing cardboard processing systems face inefficiencies when dealing with thick cardboard, leading to issues such as heat-affected zones (HAZ) and increased processing time due to the limited depth of focus of laser systems, which require slower speeds or multiple passes to achieve clean cuts.
Innovation Solution
The system creates creases at locations where cuts are required, reducing the cardboard thickness to fit within the laser's depth of focus, allowing for faster and more precise cutting without HAZ by using creasing modules in conjunction with laser modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser cutting is used on thick cardboard, then cutting precision can be improved, but heat-affected zones (HAZ) occur and processing speed must be reduced
Solution Approach 1:
The system performs preliminary creasing at the cut location before laser cutting. The creasing module compresses the cardboard along the intended cut path, creating a pre-compressed zone that reduces the effective thickness. This preliminary action enables the laser to cut through the pre-compressed area faster and more cleanly, eliminating HAZ and allowing higher processing speeds while maintaining precision.
Solution Approach 2:
The invention changes the physical state of the cardboard by applying compression through creasing. This parameter change (from uncompressed to pre-compressed state) reduces the effective thickness and density at the cut location, allowing the laser beam to penetrate more efficiently and cut faster without creating heat-affected zones, thus resolving the contradiction between precision and speed.
2Productivity
If laser cutting speed is increased to improve productivity, then processing time is reduced, but cutting precision deteriorates due to heat-affected zones
Solution Approach 1:
The creasing module performs preliminary compression at the cut location before the laser arrives. This pre-compression creates a dense, compacted zone that the laser can cut through rapidly and cleanly. By preparing the material in advance, the system enables high-speed cutting without sacrificing precision or creating heat-affected zones.
Solution Approach 2:
The pre-compressed cardboard allows the laser to 'rush through' the material at high speed without lingering. The compressed structure enables rapid energy penetration and clean separation, allowing the laser to complete the cut quickly while maintaining precision and avoiding heat-affected zones that would occur on uncompressed thick cardboard.
3Manufacturing precision
If multiple laser passes are used to cut thick cardboard, then cutting precision can be maintained, but processing time increases
Solution Approach 1:
The creasing module performs preliminary compression that prepares the cardboard for single-pass laser cutting. By pre-compressing the material along the cut path, the system enables the laser to complete the cut in one pass through the pre-compressed zone, eliminating the need for multiple passes and significantly reducing processing time while maintaining precision.
Solution Approach 2:
The creasing applies compression that exceeds what would normally be present, creating a densely compacted zone specifically at the cut location. This excessive pre-compression enables the laser to cut through the entire thickness in a single pass with high precision, eliminating the need for multiple passes and reducing total processing time.
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 approach enables efficient and precise cutting of thick cardboard by ensuring the laser beam can focus through the entire thickness, eliminating the need for slower speeds or additional passes, thereby improving throughput and reducing costs.
Implementation Method 1
processing module is a laser module
Implementation Method 2
heat-affected zones (HAZ)
Data Source
AI summary
A system and methods for operating a cardboard processing machine, the method comprising creating a pre-processing crease at a location on the cardboard where it is required to process the cardboard; and processing the cardboard along the pre-process crease.