Modular Gantry End-Effector for Large Binder Jet 3D Printing
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Solution Overview
Problem
Conventional inkjet 3D-printers are limited to producing hand-sized objects, and when scaled up for larger objects, the precision of layer printing is consistently reduced due to the need for increasingly powerful hydraulics to facilitate motion.
Innovation Solution
A modular end-effector system with a scalable printhead and a gantry or robotic system that provides reliable printed layer thickness for objects larger than a meter in length, using a combination of powder recoating, spreading, and inkjet modules with adjustable components for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional inkjet 3D-printers are scaled up for larger objects, then the printing capacity is improved, but the precision of layer printing is reduced
Solution Approach 1:
The printhead is divided into multiple independent modules (first module for powder recoating, second module for powder spreading, third module for inkjet printing) that can be separately optimized. Each module has specific functions and can be independently adjusted to maintain precision while increasing overall printing capacity.
Solution Approach 2:
The system employs adjustable and movable components including the elongated support module that can be positioned at different locations along the printhead, and the powder bed that can be lowered into recesses. This dynamic adjustability allows the system to maintain precise layer thickness control across varying print sizes.
2Shape
If the support surface is lowered into recesses for layer-by-layer printing, then the 3D structure is formed, but vertical deviations and operational vibrations occur
Solution Approach 1:
The powder bed is designed to be lowered into recesses formed in the support surface, creating a nested structure where each printed layer is accommodated in a dedicated recess. This nesting approach allows systematic layer-by-layer construction while maintaining vertical precision through controlled recess depths.
Solution Approach 2:
The system includes sensors and control mechanisms that monitor the position of the powder bed and support surface, providing feedback to actuators that adjust their positions. This closed-loop control compensates for vertical deviations and reduces operational vibrations during the printing process.
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 system achieves reliable and precise layer printing for large objects, maintaining high precision and scalability while preventing vertical deviations and operational vibrations, thus enabling the production of person, room, and house-sized objects with technical ceramics.
Implementation Method 1
small drops of ink or fluid are projected directly onto a receiver surface without physical contact between the printing device and the ink-receiver
Implementation Method 2
liquid binder which may chemically react with the powder or provide adhesion between powder particles to which the binder has been provided
Implementation Method 3
liquid binder which may chemically react with the powder
Data Source
AI summary
A modular printhead for binder jet three-dimensional printing using a gantry including an elongated support module including a mounting portion for being mounted to a vertical carrier arm of a gantry to, in use, longitudinally extend in a substantially horizontal direction, a first module for depositing a powder layer, a second module for evening a height of said powder layer, and a third module for providing a binder fluid to said evened powder layer to form a printed layer. The first, second, and third module are each connected to a mutually different lateral face of the elongated support module such that in horizontal lateral motion the first, second and third module pass over a same printing area in a sequence of first to second to third. The third module is movable connected with the support module.