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Método y dispositivo de estereolitografía para producir objetos tridimensionales


Oferta Tecnológica
Un equipo de científicos de una universidad del nordeste de Alemania ha desarrollado un sistema de estereolitografía con más de un rayo independiente para la producción de objetos tridimensionales, como prototipos, sinterizado por láser y corte por láser, así como grabado mediante fuentes láser. El sistema permite ahorrar tiempo gracias al uso de varias fuentes láser al mismo tiempo. Sus campos de aplicación incluyen prototipado rápido y fabricación rápida. El equipo de científicos busca socios industriales con el fin de establecer acuerdos de licencia o cooperación en materia de investigación para continuar con el desarrollo.


Method and device for stereo lithography to produce 3-dimensional objects
A team of scientists from a university located in the North-east of Germany developed a stereo lithography system with more than one independent ray applicable for producing of 3-dimensional objects, e.g. prototypes, laser sintering, laser cutting as well al inscribing by laser sources.
Industrial partners are sought for license agreement or a research cooperation for a further development.
The offered stereo lithography system is set in the field of additive manufacturing, specifically in 3D-printing. In general, those methods are used for the quick and cheap production of prototypes, Rapid Prototyping (RP), for fabrication of tools, Rapid Tooling (RT) or of end products or parts, Rapid Manufacturing.
It is a growing market but the present stereo lithography systems are relatively cost-intensive.

During the construction process liquid photopolymer is stored in a construction container. To create a part, the photopolymer is hardened in a defined layer by a diode laser. Once one layer is finished, the entire piece is lowered by the height of the constructed layer and the next layer is manufactured.
The laser rays are reflected to the right position by rotating or moving mirrors. This requires a precise movement along with a very planar surface. Because of this, manufacturing of such mirrors is difficult and expensive which leads to high costs for the entire system. Furthermore, every reflection of the laser causes 10 percent performance loss even with high quality mirrors. Alternative setups with glass fiber cables are expensive as well because the dividing of the laser into the different glass fiber cables is very difficult.

Not so the offered solution. Especially in the field of UV-Lasers, there are powerful and lightweight lasers available which are used for the offered stereo lithography method and device.
The newly developed system contains a moving platform located above the bin with the part to be constructed. The laser source is connected with this moving platform in such a way that it can be moved in the X- and Y-directions above the entire object. Required optical equipment, like focusing lenses, are directly attached to the laser.
An extension of this system is the use of multiple lasers at the same time. By doing so, it is possible to fabricate several small objects parallel. If the lasers are able to move independently, it is possible to manufacture larger objects in a faster and more efficient manner. A clean transition between the working areas of the lasers is guaranteed by letting those areas overlap.

The scientists are looking for industrial partners who are interested in the developed system by a license agreement and/or in a further development on the basis of a research cooperation agreement.
Advantages and Innovations:
The necessary optical equipment is mounted directly on the laser source so that their influence on the laser beam tends to zero. Therefore, diode lasers can be used which are less powerful and therefore need less energy supply. This makes the new developed stereo lithography system cheaper than the systems available on the market.
Additional, it is possible to save time due to the use of several laser sources at the same time. There are versatile fields of use, like Rapid Prototyping, Rapid Tooling or Rapid Manufacturing.
Stage of Development:
Concept stage
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
DE patent pending

Partner sought

Type and Role of Partner Sought:
- Industry with need for production of prototypes, Rapid Prototyping (RP), for fabrication of tools, Rapid Tooling (RT) or of end products or parts, Rapid Manufacturing

Task to be performed:
- Industry: interest in development cooperation and commercialization of the invention


Type and Size of Client:
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
02001001 Impresión 3D
01002002 Impresión 3D