Tapered Object Printing With Pre-Deformed Image Data
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Solution Overview
Problem
Printing a rectangular image on a truncated cone-shaped object results in distortion due to varying moving distances between the large and small diameter sides.
Innovation Solution
A printing system with a rotation support unit and a control unit that adjusts the rotation and ink ejection to match the cone's shape, combined with a print data generation device that deforms the image data to fit the cone's dimensions, ensuring uniform ink application and minimizing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rectangular image is printed on a truncated cone-shaped object using conventional printing methods, then the printing process is simple, but distortion occurs due to varying moving distances at different diameters
Solution Approach 1:
The patent applies preliminary action by pre-deforming the rectangular image data into a trapezoidal shape before printing. The image processing unit transforms the original rectangular image into a trapezoidal image where the parallel sides correspond to the large and small diameters of the truncated cone, ensuring that when the image is printed on the conical surface, the distortion is compensated and the visual appearance remains uniform.
Solution Approach 2:
The patent changes the geometric parameters of the image data from a rectangle to a trapezoid. Specifically, the image processing unit adjusts the width of the image at different vertical positions to match the varying circumference of the truncated cone, transforming the image parameters to compensate for the conical geometry and eliminate distortion.
2Area of stationary object
If the head is arranged along the side surface of a tapered printing target object, then the printing coverage is maximized, but the moving distance per rotation varies causing image distortion
Solution Approach 1:
The patent applies preliminary action by pre-deforming the rectangular image data into a trapezoidal shape before printing. The image processing unit transforms the original rectangular image into a trapezoidal image where the parallel sides correspond to the large and small diameters of the truncated cone, ensuring that when the image is printed on the conical surface, the distortion is compensated and the visual appearance remains uniform.
Solution Approach 2:
The patent changes the geometric parameters of the image data from a rectangle to a trapezoid. Specifically, the image processing unit adjusts the width of the image at different vertical positions to match the varying circumference of the truncated cone, transforming the image parameters to compensate for the conical geometry and eliminate distortion.
Data Source
AI summary
To suppress distortion in an image formed on a tapered printing target object. A printing system includes: a printing device that rotates a tapered printing target object about an axial rotation direction of the central axis and ejects an ink to the side surface of the printing target object, and a control unit that forms an image on the printing target object based on supplied print data; and a print data generation device that acquires a rectangular original image, generates an image for printing deformed in the lateral direction in such a manner that the acquired original image is tapered from a second edge side corresponding to the small-diameter-side end portion of the printing target object to a first edge side corresponding to the large-diameter-side end portion of the printing target object, and supplies the image for printing generated to the printing device as print data.