3D Printing Printhead With Plastic Fluid Guides
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Solution Overview
Problem
Existing 3D printing technologies face challenges with geometric accuracy and fluid compatibility due to metal components interacting with solvents and binders, leading to geometric distortion, corrosion, and module damage in printheads.
Innovation Solution
A printhead design that replaces metallic parts for positioning with plastic fluid guides, using materials like polyethylene and polypropylene, which do not directly influence the positioning and are chemically resistant to handle the pressure fluid effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If metallic parts are used for positioning printhead modules, then high accuracy and stability are achieved, but the metal interacts with solvents and fluids causing geometric distortion, corrosion, and module damage
Solution Approach 1:
The patent extracts the harmful metallic parts from the fluid path while retaining their positioning function. Plastic fluid guides are used instead of metal components in areas where fluid flows, eliminating corrosion and geometric distortion caused by metal-solvent interactions, while metal supports are retained only for structural positioning where they do not contact the fluid directly.
Solution Approach 2:
The patent introduces plastic as an intermediary material between the fluid and any remaining metal components. The plastic fluid guides act as a barrier that prevents direct contact between corrosive solvents and metallic parts, thereby eliminating the harmful interactions while maintaining the structural integrity and positioning accuracy provided by metal supports.
2Stability of the object's composition
If metal components are used in the printhead, then structural stability and temperature resistance are ensured, but corrosion and geometric distortion occur due to fluid interaction
Solution Approach 1:
The printhead is segmented into distinct functional zones: metal supports provide structural stability and temperature resistance in non-fluid areas, while plastic fluid guides handle fluid transport and binding agent application. This segmentation allows each material to perform its optimal function without suffering from the weaknesses of the other.
Solution Approach 2:
The printhead employs a composite construction combining metal and plastic materials, each selected for specific properties. Metal provides mechanical strength and thermal stability, while plastic provides chemical resistance to solvents and binding agents. The combination creates a system that achieves both structural stability and corrosion resistance simultaneously.
3Reliability
If plastic materials are used for fluid guidance, then chemical resistance to solvents is improved, but geometric accuracy may be affected by material swelling
Solution Approach 1:
Different plastic materials with appropriate properties are selected for different parts of the fluid guidance system. plastics resistant to specific solvents and binding agents are chosen for each application, ensuring that the local material properties match the chemical environment. This prevents swelling and maintains geometric accuracy in each specific location.
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
This design enhances the geometric accuracy and stability of 3D printed components by preventing fluid-induced damage and corrosion, ensuring precise and reliable printing without the drawbacks of metal interactions.
Implementation Method 1
The pressure module has a piezoelectric element for generating pressure
Implementation Method 2
After the solvent has evaporated, the particles stick together at the desired locations
Data Source
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AI summary
The invention relates to a print head, in particular for selectively applying printing fluid to a particle material when producing three-dimensional models using layering technology, comprising a print head tank for receiving printing fluid, which is connected to print head modules, via which the printing fluid is directed into pump chambers and to nozzles, and at least one metal carrier on which the print head modules are secured, characterised in that, in order to conduct the printing fluid through the metal carrier, plastic fluid guides are provided which are positioned throughout the metal carrier. The invention also relates to the use of said print head in a 3D-printing method.