Pivoting Printheads for Non-Linear Workpiece Surface Finishing
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Solution Overview
Problem
Existing devices for decorating or refining narrow surfaces of workpieces, such as those with non-linear contours like radii or kinks, are limited in their ability to achieve high-quality finishes due to the fixed arrangement of print heads, which prevents effective printing on complex or irregular surfaces.
Innovation Solution
A device with a printing unit that allows translational and rotational movements relative to the workpiece, featuring pivotable printheads and a common vertical axis rotation, enabling precise alignment of print media outlets to the surface contour, allowing multiple printheads to work simultaneously and adapt to irregular surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If print heads are firmly connected to a printing unit in a fixed linear arrangement, then the device structure is simple and stable, but it cannot print on surfaces with non-linear contours such as radii or kinks
Solution Approach 1:
The patent applies dynamics by making the printing unit rotatable about a vertical axis and allowing individual print heads to pivot independently. This dynamic capability enables the fixed printing unit structure to adapt to non-linear workpiece contours by rotating the entire unit and pivoting individual heads, thereby resolving the contradiction between structural simplicity and adaptability to complex surfaces
Solution Approach 2:
The patent segments the printing unit into multiple independently pivotable print heads. Each print head can be individually adjusted to align with different surface contours, allowing the system to handle complex geometries while maintaining a relatively simple overall device structure. This segmentation enables localized adaptation without requiring complete structural redesign
2Productivity
If multiple print heads are used to finish narrow surfaces in a single pass, then productivity increases, but the device complexity and alignment precision requirements increase
Solution Approach 1:
The patent uses dynamic pivot mechanisms that allow each print head to independently adjust its angle during operation. This dynamic adjustment capability maintains precise alignment with the surface contour even when multiple heads operate simultaneously, enabling high productivity without sacrificing alignment precision
Solution Approach 2:
Each print head is equipped with independent pivot capability, providing local quality adjustment. This allows each head to optimize its alignment independently based on local surface characteristics, ensuring high precision across multiple simultaneous printing operations and enabling increased productivity
Data Source
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AI summary
The invention relates to a device for finishing a surface, preferably a narrow surface, of a workpiece, which preferably consists at least partially of wood, wood-based materials, or the like, with a printing unit. The device comprises a printing unit with one or more printheads, each printhead being rotatable about its own vertical axis and relative to the printing unit by means of a pivoting element, and/or the one or more printheads together with the printing unit being rotatable about a common vertical axis, preferably equidistant from each printhead, and allowing a translational relative movement between the printing unit and the workpiece and a rotational movement of at least one printhead to be carried out simultaneously.