Medium Cutting With Preliminary Penetration for Stable Cut Shapes
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Solution Overview
Problem
Existing cutting methods for long sheet-like media in printing apparatuses result in unstable cut shapes due to the cutter blade being inclined relative to the medium's width direction, leading to difficulties in medium handling and setup.
Innovation Solution
A method and device that utilize a cutter unit with a cutter blade and moving mechanism to penetrate and cut the medium in a direction inclined to its width, stabilizing the cut shape by controlling the cutter's movement and rotation, and incorporating a winding mechanism for easy medium handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutter blade is moved in a direction inclined with respect to the width direction of the medium to enable easy pull-out and setup, then the ease of operation is improved, but the manufacturing precision deteriorates due to unstable cut shapes
Solution Approach 1:
The cutter blade penetrates the medium in advance at a predetermined position before the inclined cutting operation begins. This preliminary penetration action establishes a stable starting point and ensures the blade is properly positioned within the medium thickness, preventing instability during the subsequent inclined cutting motion and ensuring consistent cut shapes across different medium characteristics.
Solution Approach 2:
The cutting operation transitions from a static perpendicular cut to a dynamic inclined cut after the blade has penetrated the medium. The blade then moves in an inclined direction relative to the width direction of the medium, creating the desired cut shape that facilitates easy pull-out and setup while maintaining stability through the controlled dynamic motion sequence.
2Manufacturing precision
If the cutter blade penetrates the medium at a predetermined position before inclined cutting, then the manufacturing precision is improved by stabilizing the cut shape, but the productivity decreases due to additional process steps
Solution Approach 1:
The penetration operation and the inclined cutting operation are merged into a single coordinated sequence. The cutter blade penetrates the medium at a predetermined position and immediately proceeds to the inclined cutting motion without requiring separate operations, thereby stabilizing the cut shape while minimizing additional processing time through efficient operation integration.
3Manufacturing precision
If the cutter blade is positioned reliably in the medium from the start, then the manufacturing precision is improved, but the device complexity increases due to additional positioning mechanisms
Solution Approach 1:
The system performs a preliminary penetration action that automatically positions the cutter blade at a predetermined location within the medium thickness. This preliminary positioning action eliminates the need for complex pre-positioning mechanisms, as the blade's initial penetration inherently establishes the correct starting position for the subsequent inclined cutting operation, thereby achieving high positioning accuracy with minimal additional device complexity.
Data Source
AI summary
To stabilize a shape of a cut portion regardless of characteristics of a medium. The medium cutting method includes a first thrusting process of thrusting a cutter blade into a medium 2 so as to penetrate the medium 2, and a first cutting process of relatively moving the cutter blade with respect to the medium 2 in a longitudinal direction of the medium 2 and a width direction of the medium 2 with a first thrusting spot SP2 as a starting point, which is a spot thrust by the cutter blade in the first thrusting process, to cut the medium 2 in a direction inclined with respect to the width direction of the medium 2.