Thin Sheet Bending Device with Dihedral Template and Suction Alignment
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Solution Overview
Problem
Existing methods for producing composite image display devices with parallel dihedrals face challenges in precise positioning of image bands, leading to errors in fold lines coinciding with grooves, especially for large images, resulting in significant errors due to accumulation of minor misalignments.
Innovation Solution
A device featuring a frame with a bending template of parallel dihedrals and mobile applicator blades that apply score lines precisely along the template's junction lines, using stepper motors and suction channels to maintain alignment and prevent slippage, ensuring accurate folding of sheets into dihedrals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing printing equipment is used to produce alternating strips of photographs, then precision of strip placement is improved, but alignment error between groove and fold line increases due to cumulative effects over large sheet lengths
Solution Approach 1:
The patent introduces a folding template as an intermediary tool between the sheet and the folding operation. The template includes a reference line that serves as a mediator to establish precise alignment between the groove and the fold line, eliminating cumulative alignment errors that occur when folding large sheets directly
Solution Approach 2:
The patent applies a marking line on the sheet along the groove before the folding operation. This preliminary marking serves as a reference that is transferred to the folding template, ensuring that the fold line aligns precisely with the groove from the outset, preventing cumulative misalignment during the folding process
2Manufacturing precision
If a folding template with reference lines is used to ensure precise alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the alignment function from the complex folding operation and concentrates it into a simple linear reference line on the folding template. This reference line is the minimal element needed to establish precise alignment between the groove and fold line, reducing the complexity of the overall device while maintaining high precision
3Stability of the object's composition
If suction channels are added to hold the sheet against the template, then stability during folding is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs a suction-based holding mechanism that uses pneumatic pressure to secure the sheet against the folding template. The suction channels create a vacuum that holds the sheet in place during folding, providing stable positioning without requiring complex mechanical clamping systems
Solution Approach 2:
The suction channels act as an intermediary mechanism between the sheet and the template, creating a holding force that maintains the sheet in the correct position during folding. This pneumatic intermediary provides stable positioning more effectively than direct mechanical contact
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
The solution ensures precise alignment and accurate folding of sheets into dihedrals, minimizing errors and maintaining precise positioning throughout the folding process, even for large images, by using vertically movable blades and suction mechanisms to hold the sheet against the folding template.
Implementation Method 1
the folded sections of the sheet remaining on the folding jig, the dihedral angles forming the jig being traversed by channels connected to suction devices
Data Source
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AI summary
The present invention relates to a device for bending a thin sheet, in particular a sheet of paper (33), according to equidistant parallel score lines made on said sheet, which extend transversely from one side of the sheet to the other. Said device is characterised in that it comprises: a frame capable of receiving a bending template which is at least the same size as the sheet (33) to be bent and which consists of a series of adjacent, transversal and identical parallel dihedrons (19) separated by a joining line; a translatably movable applicator means (35a, 35b, 35c) capable of consecutively applying a score line of the sheet (33) against a joining line of the bending template; a supporting means capable, during the actuation of the applicator means on a predetermined joining line, of keeping at least one score line applied against a joining line located upstream of said predetermined joining line.