Digital Corrugated Cardboard Cutting Head for Accurate Template-Free Creasing
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Solution Overview
Problem
Traditional methods for cutting and creasing corrugated cardboard, such as rotary and flatbed die-cutting, face challenges with accuracy, productivity, and high costs due to the need for dedicated templates and complex machinery, while laser cutting struggles with thick or multilayered cartons and leaves burn residues.
Innovation Solution
A digital cutting and creasing system with a conveyor and a punching head unit featuring an array of selectively actuated punching elements, controlled by a unit to form precise cutting and creasing lines, allowing for high accuracy and productivity without dedicated templates, and optionally using lubricating or etching agents to enhance cutting and creasing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rotary die-cutting is used for continuous operation, then productivity is improved, but cutting accuracy deteriorates due to slip between blank and cutter
Solution Approach 1:
The patent replaces traditional mechanical die-cutting systems with a laser-based cutting system. The laser beam cuts the cardboard without physical contact, eliminating slip between the blank and cutter that plagues rotary die-cutting. This substitution maintains high productivity through continuous operation while achieving superior cutting accuracy through precise laser positioning and control.
2Manufacturing precision
If dedicated punching templates are prepared for each cutting pattern, then cutting accuracy is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent uses digital copies (computer files containing cutting patterns) instead of physical punching templates. The system reads digital design files and reproduces the cutting patterns using laser or punching elements, eliminating the need for manufacturing, storing, and changing physical templates. This approach maintains cutting accuracy through precise digital control while dramatically reducing device complexity and associated costs.
Solution Approach 2:
The patent creates a universal cutting system that can handle multiple different cutting patterns using the same equipment. Instead of requiring dedicated templates for each pattern, the system uses a single multi-functional apparatus controlled by digital files, allowing it to switch between different cutting designs without changing physical components.
3Ease of manufacture
If laser cutting is used to avoid physical contact, then template costs are reduced, but cutting quality deteriorates due to burn residues on substrate
Solution Approach 1:
The patent introduces lubricating or etching agents as intermediaries between the cutting tool and the cardboard substrate. These agents are applied to the cutting area to facilitate cleaner cutting, reduce friction, and prevent burn residues from forming on the cardboard surface, thereby maintaining the advantages of contactless cutting while eliminating the harmful burn effects.
4Manufacturing precision
If flatbed die-cutting is used for high cutting accuracy, then manufacturing precision is improved, but productivity deteriorates due to intermittent operation
Solution Approach 1:
The patent implements continuous operation capability in the cutting system. The conveyor belt continuously feeds cardboard through the cutting apparatus, and the laser or punching elements operate continuously along the cutting path, eliminating the intermittent stop-and-go operation characteristic of flatbed die-cutting. This maintains high cutting accuracy while dramatically improving productivity through uninterrupted processing.
Data Source
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AI summary
The present invention relates to systems and processes for cutting and creasing corrugated cardboards, and more specifically, to digital system and processes for cutting and creasing corrugated cardboards, wherein the system includes an array of cutting elements that can be dynamically configured to cut and/or crease a wide range of contours.