Universal Wire Holding Mechanism for 3D Object Printing
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Solution Overview
Problem
Existing systems for printing on three-dimensional objects in non-production environments require unique part holders for each object, limiting the ability to print on general objects brought by end users due to the need for machined metal brackets with dedicated features.
Innovation Solution
A universal object holding mechanism using an array of wires stretched between a back plate and datum pins, allowing for the secure holding of objects against a minimum number of pins to maximize printing surface area, with tensioning and alignment systems to accommodate varied object sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If unique part holders with dedicated locating and fastening features are used for each object, then manufacturing precision and reliability are improved, but device complexity and adaptability worsen
Solution Approach 1:
The patent applies universality by replacing dedicated part holders with a generic holding mechanism that can accommodate multiple types of 3-D objects. The mechanism uses an array of wires that can be tensioned to hold various objects against a back plate, eliminating the need for unique holders for each object type while maintaining accurate positioning for printing.
Solution Approach 2:
The patent uses parameter changes by adjusting wire tension to accommodate different object sizes and shapes. The tensioning system allows the same holding mechanism to adapt to various objects by changing the tension parameters of the wires, rather than requiring different mechanical structures for each object type.
2Manufacturing precision
If objects are held against multiple datum pins, then manufacturing precision is improved, but the printing surface area is reduced
Solution Approach 1:
The patent extracts the essential positioning function by using a minimal set of datum pins rather than multiple pins. The array of wires provides the necessary constraints to hold the object securely while using only the minimum number of pins required for accurate positioning, thereby maximizing the available printing surface area.
3Reliability
If wires are tensioned to hold objects securely, then reliability is improved, but laminar airflow turbulence increases affecting image quality
Solution Approach 1:
The patent applies local quality by creating localized tension zones with the wire array rather than uniform tension across the entire object. This allows secure holding of the object while minimizing disruption to the laminar airflow in the critical printing zone, as the wires are positioned to hold the object without creating excessive turbulence in the path of the print heads.
Data Source
AI summary
A universal object holding mechanism for holding three-dimensional objects for printing thereon uses an array of wires connected to one side of a frame that are stretched to an opposite side of the frame of the holding mechanism to thereby trap an object between the wires and a back plate positioned behind and spaced from the frame. A minimum number of wires are used to hold the object against a minimum number of datum pins, so that the maximum amount of object surface is available for printing.