Sintered Support Blades for 3D Printing Detachment
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Solution Overview
Problem
Existing methods for producing three-dimensional objects by sintering require additional machining or cutting steps to separate the object from its manufacturing plate, which can lead to unsatisfactory surface finishes and complex industrial processes, especially for objects with undercut surfaces.
Innovation Solution
A method involving the creation of a support structure with homothetic surfaces and sintered blades that allow for easy detachment of the object by mechanical rupture, reducing the need for elaborate removal processes and improving surface finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional sintering methods are used to manufacture three-dimensional objects, then the objects can be produced from powder layers, but additional machining or cutting steps are required to separate the object from the manufacturing plate, increasing process complexity
Solution Approach 1:
The support structure is segmented into multiple blades distributed across the manufacturing plate. Each blade independently supports a portion of the object, allowing selective removal of individual blades to facilitate object extraction without requiring complex machining operations on the entire support structure.
Solution Approach 2:
The support blades are designed to be easily extracted from the support structure. The blades can be removed individually by applying force to detach them from the sintered support, enabling simple object removal without elaborate industrial processes.
2Strength
If traditional support structures with many support rods are used, then the object can be supported during manufacturing, but the detachment becomes difficult and surface quality deteriorates
Solution Approach 1:
The support structure uses blades with locally optimized geometry and distribution. Each blade is positioned and dimensioned to provide precise local support where needed, while maintaining overall structural strength. The blade dimensions and spacing are tailored to the specific object geometry to ensure adequate support without compromising surface quality.
Solution Approach 2:
The support blades are designed as temporary, disposable elements that are easily broken or removed after serving their support function. This allows the use of simple, low-cost blade structures that can be discarded after object extraction, eliminating the need for complex, reusable support systems.
3Adaptability or versatility
If supports are used for objects with undercut surfaces, then the objects can be manufactured, but the interface areas between the object and build plate are modified, degrading the surface quality
Solution Approach 1:
The blade cross-sections are designed with asymmetric geometries that adapt to the specific undercut surface requirements. The blades can have varying thicknesses, angles, and profiles matched to the local surface geometry, providing support for undercut areas while minimizing interference with the final surface quality.
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
Facilitates the removal of three-dimensional objects with reduced complexity and improved surface quality by using sintered blades that can be broken to release the object from the support, minimizing additional industrial processes.
Implementation Method 1
solidifying by fusion under the effect of the thermal energy supplied by a laser certain zones of the powder previously spread and compacted
Implementation Method 2
Each layer of powder is sintered, only at the level of the zones intended to form the finished object
Implementation Method 3
detaching the three-dimensional object from the support by applying a force to the three-dimensional object or to the support, tending to move the object and the support relative to each other until the blade(s) break
Data Source
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AI summary
This method for producing a three-dimensional object (1) from a powder or from a mixture of powders by sintering and/or laser melting comprises manufacturing steps consisting of depositing, compacting, then solidifying, in predetermined areas, successive layers of the powder or of the mixture of powders. It further comprises the following steps: a) before implementing the steps of manufacturing the three-dimensional object and from a manufacturing table (3), manufacturing, by sintering and/or laser melting, a support (5) whereof the surface or surfaces oriented towards the three-dimensional object to be manufactured are respectively homothetic to surfaces (11) opposite the three-dimensional object to be manufactured; b) manufacturing, by sintering and/or laser melting, blades (7) for supporting the three-dimensional object to be manufactured on the support produced in step a); c) manufacturing the three-dimensional object from the upper surfaces of the blades manufactured in step b) and d) when the manufacturing of the three-dimensional object is complete, detaching the three-dimensional object from the support by applying a force to the three-dimensional object or to the support, moving the object and the support relative to one another until the blades break.