Laser Pattern Formation for Uniform Marking on Conveyed Base Materials
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Solution Overview
Problem
Existing pattern formation methods for base materials, such as PET bottles, suffer from variations in patterns due to inconsistencies in laser light path length and beam size, leading to inconsistent optical properties and reduced visibility of information.
Innovation Solution
A pattern formation apparatus that irradiates base materials with a laser to maintain a constant light path length and beam size, forming patterns with dot portions that have recesses and protrusions to enhance optical diffusion and visibility, thereby reducing pattern variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser irradiation is used to form patterns on base materials, then pattern formation speed and productivity are improved, but variation in light path length and beam size causes pattern inconsistency
Solution Approach 1:
The patent employs dynamic adjustment of the laser beam diameter to compensate for variations in light path length. As the base material moves through the irradiation unit at different positions, the beam diameter is dynamically changed to maintain constant irradiation energy density, thereby ensuring pattern consistency while enabling continuous high-speed production
Solution Approach 2:
The patent changes the physical parameter of laser beam diameter based on the position of the base material. By adjusting the beam diameter parameter in response to light path length variations, the system maintains consistent irradiation conditions across different positions, resolving the contradiction between production speed and pattern uniformity
2Ease of manufacture
If direct thermal processing or molding is used for marking, then label-free information display is achieved, but pattern variation occurs due to inconsistent processing conditions
Solution Approach 1:
The patent implements a feedback control system that monitors the position of the base material and adjusts the laser beam diameter accordingly. This feedback mechanism ensures that despite variations in light path length caused by different positions or material characteristics, the irradiation energy density remains constant, achieving uniform patterns for label-free information display
3Device complexity
If laser beam parameters are not adjusted, then device complexity is reduced, but optical properties and visibility of formed patterns vary
Solution Approach 1:
The patent introduces dynamic beam diameter adjustment to maintain constant irradiation energy density. This dynamic control compensates for light path length variations, ensuring consistent optical properties and pattern visibility without requiring complex manual intervention or multiple laser systems
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 reduces pattern variations and enhances visibility by maintaining consistent optical properties across multiple base materials, ensuring clear display of information without the need for labels.
Implementation Method 1
irradiate each of a plurality of base materials being conveyed, with laser such that one of a light path length and a beam size at a position of the plurality of base materials is approximately constant
Implementation Method 2
based on direct thermal processing
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A pattern formation apparatus is configured to irradiate each of a plurality of base materials (1a) being conveyed, with laser such that one of a light path length and a beam size at a position of the plurality of base materials (1a) is approximately constant, to form a pattern (11) on a surface of each of the plurality of base materials (1a).