Laser Cardboard Creasing With Defocused Beam Ablation
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Solution Overview
Problem
Conventional laser-based creasing methods for cardboard are time-consuming and prone to errors due to the need for multiple creasing lines, which increases the risk of cutting through the cardboard during folding.
Innovation Solution
A method and device using an unfocused laser beam with a larger diameter to ablate the cardboard surface along desired folding lines, reducing the number of creasing lines required and minimizing the risk of cutting, with the laser beam moved in patterns such as parallel lines or dashed lines to facilitate efficient folding without visible creases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a focused laser beam is used for creasing cardboard, then the laser can precisely ablate the upper layer, but multiple creasing lines are necessary which increases processing time and risk of cutting through
Solution Approach 1:
The patent changes the focus parameter of the laser beam from focused (conventional method) to unfocused. This parameter change allows a single broader creasing line to achieve the same ablation effect that previously required multiple narrower lines, reducing processing time while maintaining precision of the crease.
2Ease of operation
If multiple creasing lines are used to enable sufficient folding, then folding capability is improved, but the risk of accidentally overlapping lines and cutting through the cardboard increases
Solution Approach 1:
By changing the laser beam focus parameter to unfocused, the patent creates a single broader creasing line that eliminates the need for multiple lines. This reduces the risk of overlapping lines and accidentally cutting through the cardboard while maintaining sufficient folding capability.
3Productivity
If the laser beam diameter is increased to reduce the number of creasing lines, then productivity improves, but the precision of ablation may be compromised
Solution Approach 1:
The patent changes the focus parameter to unfocused, which naturally increases the beam diameter at the cardboard surface. This single parameter change achieves both goals: broader coverage for fewer lines and maintained ablation precision through controlled unfocused energy distribution.
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 significantly reduces the time and risk associated with creasing cardboard, allowing for efficient folding with fewer lines, enhancing productivity and ensuring the creases are not visible on the final packaging.
Implementation Method 1
the laser beam is moved over the cardboard along a desired folding line such that an upper layer of the cardboard is ablated without cutting through the cardboard
Data Source
AI summary
A method for processing a cardboard (12) with a laser beam (14) is provided, wherein the laser beam (14) is moved over the cardboard (12) along a desired folding line (24) such that an upper layer of the cardboard (12) is ablated without cutting through the cardboard (12), wherein the laser beam (14) is adjusted such that the laser beam (14) is focused below the cardboard (12). Further, a device (10) for carrying out a method for processing a cardboard (12) with a laser beam (14) is provided.