Upper Blade Roller Curved Geometry for Narrow Slitting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for slitting laminated films with adhesive layers struggle to achieve narrow widths without causing the base film and adhesive layer to peel apart, leading to issues with machining precision, bump formation, and adhesive layer protrusion.
Innovation Solution
The use of flat upper blades with two ridges on one side for shear cutting, which allows for precise slitting to widths as small as 0.5 mm or less, while reducing bump formation and preventing peeling and adhesive layer protrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shear cutting is performed using conventional flat blades to slit laminated film, then cutting action is achieved, but the base film and adhesive layer peel apart and bumps form at the cut sections
Solution Approach 1:
The upper blade is designed with a curved cutting surface that contacts the laminated film along an arc rather than a straight line. This curved geometry allows the blade to apply cutting force progressively across the thickness of the film, preventing the adhesive layer from peeling away and eliminating bump formation at the cut sections while maintaining laminated structure integrity
Solution Approach 2:
The invention changes the geometric parameters of the blade, specifically using a curved surface with controlled radius and angle of contact. This parameter modification transforms the cutting mechanism from a conventional flat blade approach that causes peeling and bumps into a curved blade approach that maintains layer alignment and produces clean cuts without defects
2Length of moving object
If narrow width slitting is attempted with conventional methods, then tape width is reduced, but the base film and adhesive layer are more likely to peel apart
Solution Approach 1:
The curved upper blade design is particularly effective for narrow width slitting because the arc-shaped contact distributes cutting stress more evenly across the reduced width, preventing the adhesive layer from peeling away at the edges which is the primary failure mode in narrow tape production
3Device complexity
If conventional flat blades are used for slitting, then simple blade structure is maintained, but bumps form at the cut sections causing flatness impairment and adhesive layer protrusion
Solution Approach 1:
The curved blade surface is designed to match the expected bump formation pattern, effectively counteracting the tendency for the base film to form bumps at cut sections. This geometric solution simultaneously prevents adhesive layer protrusion and maintains tape flatness without requiring complex additional components
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 clear cut sections, suppresses bump formation, prevents peeling of the base film and adhesive layer, and prevents adhesive layer protrusion from wound bodies, resulting in high-quality narrow laminated tapes.
Implementation Method 1
slitting a laminated film including an adhesive layer peelably laminated on a base film by shear cutting to a tape width of 0.5 mm or less
Data Source
AI summary
A laminated film including an adhesive layer peelably laminated on a base film is shear cut using an upper roller including specific upper blades arranged at a pitch of 0.5 mm or less for slitting. The upper blade includes one side surface constituting a blade edge being a flat surface and the other side surface having a first ridge and a second ridge from the blade edge aide. A laminated tape including an adhesive layer peelably laminated on a base film is slit by slitting using this upper blade to a tape width of 0.5 mm or less without the base film and the adhesive layer peeling apart and with suppressed protrusion of the adhesive layer in the slit tape.