Dual-pass trim cutter for neat bound material edge trimming
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Solution Overview
Problem
Conventional trimmers fail to neatly trim the edge portions of bound materials without bending or tearing, especially when dealing with long edges or uncut pages that are half-folded.
Innovation Solution
A trimmer system with a table and trim cutter that includes a first drive mechanism for vertical reciprocation and a second drive mechanism for perpendicular movement, controlled by a unit that cuts the edge portion at two parallel lines spaced closely, ensuring precise cutting by moving between these lines to prevent bending and tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the trim cutter cuts the edge portion only once, then the cutting operation is simple and fast, but the edge portion may be bent or the cover may be torn
Solution Approach 1:
The cutting operation is divided into two sequential cutting passes. The trim cutter first cuts at a first position, then moves to a second position to cut again. This segmentation of the cutting process allows the edge portion to be trimmed without bending or tearing while maintaining operational efficiency through automated control.
2Device complexity
If the trim cutter reciprocates only once, then the device complexity is low, but the edge portion cannot be trimmed neatly
Solution Approach 1:
The trimmer incorporates a control unit that dynamically adjusts the cutting process by controlling the reciprocation of the trim cutter multiple times. The system automatically manages the movement between first and second cutting positions, adding dynamic control capability without requiring complex mechanical restructuring of the cutting mechanism.
3Manufacturing precision
If the trim cutter moves to cut at two different positions, then the edge portion is trimmed neatly, but the operation time increases
Solution Approach 1:
The control unit manages the cutting operation to ensure continuous useful action by automatically controlling the trim cutter's reciprocation between the first and second positions without idle delays. The system maintains continuous engagement with the workpiece throughout the dual-cutting process, minimizing non-productive time while achieving neat edge trimming.
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
It is an object of the present invention to provide a trimmer which can cut the edge portion of the bound material neatly without bending the edge portion of the bound material and tearing the cover of the bound material. An edge portion 1a of a bound material 1 is provided with first and second lines 100 and 101 to be cut. The first and second lines 100 and 101 are spaced at a small interval X and arranged in parallel to each other. The first line 100 is arranged outside of the second line 101 of the bound material 1. And, a control unit 7 controls first and second drive mechanisms 21 and 56 in such a manner that the edge portion 1a of the bound material 1 is cut at the first line 100 by a trim cutter 20, then the trim cutter 20 or the table 10 is moved at the small interval X in a moving direction 56a toward the second line 101, and then the edge portion 1a of the bound material 1 is cut at the second line 101 by the trim cutter 20.