Cardboard Pre-Creasing for Precise Laser Cutting of Thick Corrugate
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Solution Overview
Problem
Existing cardboard pretreatment systems face inefficiencies when processing thick corrugated cardboard, leading to issues like heat-affected zones (HAZ) and increased processing time, as the laser beam's depth of focus limits precise cutting and creasing, especially when dealing with varying cardboard thickness.
Innovation Solution
The system creates creases at locations where cuts are required, reducing the cardboard thickness to within the laser's depth of focus, allowing for precise cutting without additional passes or slower speeds, using a combination of rule dies and laser technology to thin the cardboard effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser beam is used to cut thick corrugated cardboard, then cutting precision is improved, but processing time increases and heat-affected zone expands
Solution Approach 1:
The cutting process is divided into two distinct stages: first, a crease is created along the cutting line to separate and thin the cardboard layers; second, the laser beam cuts only the thinned creased area. This segmentation allows the laser to operate within its depth of focus, maintaining precision while reducing processing time and heat-affected zone.
Solution Approach 2:
The creasing operation is performed as a preliminary action before laser cutting. By pre-creasing the cardboard along the intended cutting line, the material is thinned and separated in advance, preparing it for efficient laser cutting without requiring the laser to process the full thickness of thick corrugated cardboard.
2Manufacturing precision
If laser beam is used to cut thick corrugated cardboard, then cutting precision is improved, but heat-affected zone increases
Solution Approach 1:
The cutting process is divided into two distinct stages: first, a crease is created along the cutting line to separate and thin the cardboard layers; second, the laser beam cuts only the thinned creased area. This segmentation allows the laser to operate within its depth of focus, maintaining precision while reducing processing time and heat-affected zone.
Solution Approach 2:
The creasing operation is performed as a preliminary action before laser cutting. By pre-creasing the cardboard along the intended cutting line, the material is thinned and separated in advance, preparing it for efficient laser cutting without requiring the laser to process the full thickness of thick corrugated cardboard, thereby minimizing heat exposure.
3Productivity
If traditional cutting method is used for corrugated cardboard, then processing speed is maintained, but cutting precision deteriorates for thick material
Solution Approach 1:
The cutting process is divided into two distinct stages: first, a crease is created along the cutting line to separate and thin the cardboard layers; second, the laser beam cuts only the thinned creased area. This segmentation allows the laser to operate within its depth of focus, maintaining precision while reducing processing time and heat-affected zone.
Solution Approach 2:
The creasing operation is performed as a preliminary action before laser cutting. By pre-creasing the cardboard along the intended cutting line, the material is thinned and separated in advance, preparing it for efficient laser cutting without requiring the laser to process the full thickness of thick corrugated cardboard.
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 faster and more accurate cutting of corrugated cardboard with reduced HAZ and increased throughput, as the creasing module thins the cardboard to match the laser's focus, improving cut quality and reducing processing time and costs.
Implementation Method 1
the creasing module thins the cardboard to match the laser's focus
Implementation Method 2
processing the cardboard along the pre-process crease... the processing module is optionally a laser module
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.