Process and freeform fabrication system for producing a three-dimensional object
A technology of three-dimensional objects and manufacturing systems, which is applied in the direction of manufacturing tools, additive manufacturing, and 3D image production, and can solve the unsatisfactory problems of free-form manufacturing systems
Active Publication Date: 2010-12-15
ENVISIONTEC GMBH DE
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Problems solved by technology
[0005] However, previous freeform manufacturing systems described in WO 03 / 059184A2 and other documents dealing with synthetic materials to be cured were found to be unsatisfactory
Method used
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Embodiment Construction
[0087] according to figure 1 , in a specific embodiment of a free-form manufacturing method and system for the fabrication of three-dimensional objects based on stereolithography, a container or jar 1 is used for providing a material 7 to be cured, the material 7 comprising a particulate filler 6 and a binder 5 , particle filler 6 such as yttria stabilized tetragonal zirconia phase material (3YTZP), binder 5 such as acrylic resin. The material 7 to be cured may also contain the above-mentioned components, such as sintering aids in the filler material and photoinitiators in the binder, and optionally auxiliaries. figure 1 The method and system are shown at a particular moment during execution, where a portion 9 of the desired three-dimensional object has been fabricated and carried on a three-dimensional object carrier / feed 10, here shown as a platform form. A gap is formed between the surface of the previously cured partial object 9 and the bottom 2 of the container or vat 1...
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Abstract
The present invention describes a process for producing a three-dimensional object, comprising: providing a material to be solidified, the material comprising a filler and a binder; delivering electromagnetic radiation and / or synergistic stimulation in a pattern or an image to a building region for solidifying said material; wherein said delivering of electromagnetic radiation and / or synergistic stimulation is performed selectively to a defined area or volume of said material to be solidified; and wherein an energy density of electromagnetic radiation and / or synergistic stimulation is varied within said pattern or image and / or between patterns or images of different building regions of said material. The present invention may be directed also to a system where different first and second materials are to be solidified. The present invention further provides a freeform fabrication system, and a freeform three-dimensional object having unique properties as well as products derived therefrom, such as sintered products.
Description
technical field [0001] The present invention relates to a method and apparatus for making at least one three-dimensional object by curing a curable material comprising a filler and a binder. The method and device are particularly suitable for medical applications, eg for making implants, bone substitutes, especially for making dental products. Background technique [0002] Known methods and apparatuses for making at least one three-dimensional object by solidifying curable materials are sometimes referred to as rapid prototyping and fabrication techniques, and sometimes they are more specifically referred to as stereolithography, laser sintering, fused deposition modeling, Selective light modulation, etc., but not limited to these. Hereinafter, the methods, apparatuses and systems in the art are collectively referred to as "free-form manufacturing". [0003] Sometimes, especially in the case of providing stronger three-dimensional objects formed by free-form fabrication, t...
Claims
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IPC IPC(8): A61C13/00B29C67/00G03F7/00
CPCA61C13/0013B29C67/0081G03F7/0037B29C64/129Y10T428/31B33Y10/00B33Y80/00B33Y70/10
Inventor A·埃尔-斯博兰尼
Owner ENVISIONTEC GMBH DE