Multi-material 3D Printer with Adjustable Binder Foundation
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Solution Overview
Problem
Three-dimensional (3D) printing technologies face limitations in creating precise thin layers and achieving uniform powder deposition due to the in situ creation of patterned layers, which restricts material compatibility, layer density control, and feature precision in powder bed-based processes.
Innovation Solution
A jetted binder printing system that includes a carrier substrate with an adjustable binder printer, a dispensing module for powder deposition, a compaction module for controlled pressure, and a primary binder printer, allowing for the creation of a stable and uniform powder layer on the carrier substrate, followed by selective fusion and removal of non-fused material to form patterned single-layer objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If in situ pattern generation is used to create the first layer of powder, then the process is simplified and no manipulation of layers is required, but the powder layer cannot be stabilized uniformly and the first layer must be on a bed of several layers of powder confined by a build box
Solution Approach 1:
The process is segmented into separate steps: first creating a stable powder bed foundation layer on the carrier substrate, then performing in situ pattern generation on top of this foundation. This segmentation allows the foundation to provide stability while the pattern generation maintains process simplicity.
Solution Approach 2:
A preliminary stable powder bed foundation layer is created on the carrier substrate before the actual pattern generation occurs. This preliminary action provides a stable base that enables uniform subsequent layers without requiring the pattern generation step to also perform the stabilization function.
2Device complexity
If in situ build is used, then the process is integrated, but the system is limited to a single material to avoid cross-contamination and cannot condition the powder layer to obtain desired density
Solution Approach 1:
The carrier substrate acts as an intermediary between the powder bed and the build box, enabling the separation of the foundation layer creation from the pattern generation process. This intermediary role allows for better material compatibility and layer conditioning while maintaining process integration.
3Productivity
If in situ build is used, then the process is streamlined, but the system cannot reject or correct a defective layer before it is incorporated into the complete printed part
Solution Approach 1:
The building process is segmented into removable foundation layers and patterned layers. If a defective layer is detected, the segmented structure allows for selective removal and correction of only the affected portion without compromising the entire printed part, thereby maintaining productivity while improving reliability.
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 approach enables the production of precise and uniform 3D objects by allowing for separate manipulation of the pattern generation and assembly steps, improving material compatibility and layer density, thereby overcoming the limitations of in situ layer creation.
Implementation Method 1
an adjustable binder printer configured to deliver an adjustable binder to the carrier substrate
Implementation Method 2
the compaction module being configured to apply a controlled pressure, in a direction substantially orthogonal to the longitudinal direction of the carrier substrate, to increase a compaction of the dispensed powder to a desired compaction range
Implementation Method 3
the primary binder printer including a print head configured to print a primary binder on the dispensed powder according to a desired pattern
Data Source
AI summary
A jetted binder printing system includes a carrier substrate configured to travel along a longitudinal direction thereof, an adjustable binder printer configured to deliver an adjustable binder to the carrier substrate, a dispensing module located downstream from the adjustable binder printer on the longitudinal direction of the carrier substrate, the dispensing module including at least one powder container, the dispensing module being configured to dispense powder onto the carrier substrate, and a primary binder printer located downstream from the compaction module along the longitudinal direction of the carrier substrate. The primary binder printer includes a print head configured to print a primary binder on the dispensed powder according to a desired pattern. The primary binder is printed on a surface of the powder that is opposite a surface on which the adjustable binder is printed. The primary binder is printed to match the pattern of the adjustable binder.