Laser Cutting Label Paper Using Pre-Printed Dark Locus
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Solution Overview
Problem
Existing methods for half-cut cutout processing of label paper using laser beams are complex and burdensome due to the need for adjusting and controlling processing energy based on varying surface colors and printed image colors, which can result in damage to the supporting sheet.
Innovation Solution
The method involves printing a cutting locus in a single color that is darker than or equal in darkness to the darkest color of the surface or print image, and irradiating it with a laser beam, allowing for constant processing energy and precise cutting without damaging the supporting sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the processing energy of the laser beam is adjusted and controlled for each label sheet of different surface colors, then the cutting precision is improved, but the device complexity and operational burden increase
Solution Approach 1:
The cutting locus is printed in advance on the label sheet before cutting. This preliminary action creates a standardized dark-colored guide pattern that ensures consistent laser absorption regardless of the original label sheet color, eliminating the need for real-time energy adjustment during cutting operations
Solution Approach 2:
The invention changes the color parameter of the cutting locus to be uniformly dark (darker than or equal to the darkest color in portions to be cut). This parameter standardization ensures consistent laser beam absorption across different label sheet colors, allowing fixed processing energy to be used for all cutting operations
2Manufacturing precision
If the processing energy of the laser beam is frequently adjusted and controlled during each cutting operation, then the cutting precision is improved, but the productivity decreases
Solution Approach 1:
The cutting locus printing is performed as a preliminary step before cutting. This pre-printing creates a standardized target that eliminates the need for frequent energy adjustments during cutting, thereby maintaining high cutting precision while significantly improving productivity by streamlining the cutting operation
Solution Approach 2:
By pre-printing the cutting locus, the invention enables continuous cutting operations with fixed processing energy. The dark-colored locus ensures consistent laser absorption throughout the cutting path, allowing the laser beam to continuously cut through the label sheet without interruption for energy adjustments, thus maintaining both precision and efficiency
3Manufacturing precision
If the laser beam processing energy is increased to cut through darker printed image portions, then the cutting depth is improved, but the supporting sheet may be damaged
Solution Approach 1:
The invention applies local quality by creating a dark-colored cutting locus only in the specific regions where cutting is needed. This localized dark pattern ensures that the laser beam is absorbed primarily at the cutting locus rather than across the entire label sheet, enabling precise control of cutting depth to match the label sheet thickness without damaging the supporting sheet
Solution Approach 2:
The cutting locus acts as an intermediary that mediates between the laser beam and the label sheet. By printing a dark-colored locus that is darker than or equal to the darkest color in portions to be cut, it serves as a standardized absorption target that ensures consistent laser energy absorption and controlled cutting depth, preventing both insufficient cutting and excessive cutting that could damage the supporting sheet
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 simplifies the adjustment and control of laser beam energy, reduces operational burdens, minimizes waste, and enhances processing efficiency by maintaining a consistent depth of cut, thereby preventing damage to the supporting sheet and reducing costs.
Implementation Method 1
irradiating with laser beam, and thereby cutting, the cutting locus so printed
Implementation Method 2
irradiated with laser beam (laser light ray) and thereby only the label sheet of the label paper is cut into given cutout shapes
Implementation Method 3
the darker and brighter the color of the label sheet surface becomes, the higher and lower the absorption efficiency of the laser beam becomes
Data Source
AI summary
A method of half-cut cutout processing of label paper 1 is disclosed that allows laser beam 11 to cut a label sheet 3 of the label paper 1 into a given cutout shape without damaging a supporting sheet 2. In the method, a cutting locus 30 along contours of the cutout shape is printed on a surface of the label sheet 3 in a single color which is darker than or equal in darkness to a color that is the darkest of colors in portions to be cut, and then the cutting locus 30 printed is irradiated with the laser beam, thereby cutting the label sheet 3 selectively into the cutout shape.