Maro Publications

Laser Sintering

Patents with Abstracts

*12/21/2012

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Patents with Abstracts

8. 8,303,886 
Method of manufacturing a three-dimensional object
 
Philippi of EOS GmbH Electro Optical Systems, Germany, produced a three-dimensional object by solidifying a building material by means of a beam of a gas laser at locations in each layer corresponding to the cross section of the object.  The power of the laser is measured and the power of the laser is controlled according to the measured value.  The power measurement takes place in a time window, in which a change of the power occurs, and an input control signal of the laser is controlled according to the measured values. (RDC 12/21/2012)

7. 8,303,886 
Method of manufacturing a three-dimensional object
 
Philippi of EOS GmbH Electro Optical Systems, formed a three-dimensional object layer by layer by solidifying a building material by means of a beam of a gas laser at locations in each layer corresponding to the cross section of the object, wherein the power of the laser is measured and the power of the laser is controlled according to the measured value.  The power measurement takes place in a time window, in which a change of the power occurs, and an input control signal of the laser is controlled according to the measured values. (RDC 12/12/2012)

6. 8,282,377 
Method and apparatus for producing a three-dimensionally shaped object
 
Higashi et al of Panasonic Corporation, Japan, produced a three-dimensionally shaped object, (i) by irradiating a light beam on a specified portion of a powder layer to sinter or melt the specified portion. Further, (ii) another solidified layer is formed by placing a new powder layer on the solidified layer obtained in step (i), and irradiating the light beam on a specified portion of the new powder layer to sinter or melt the specified portion of the new powder layer. The steps (i) and (ii) are repeated to produce a three-dimensionally shaped object. In the method, a gas is supplied to a mirror used in scanning the light beam. (RDC 10/10/2012)

5. 8,187,522 
Method and apparatus for producing a three-dimensionally shaped object, and three dimensionally shaped object
 
Higashi et al of Panasonic, Japan, developed a method for producing a three-dimensionally shaped object by (i) forming a solidified layer by irradiating a light beam on a specified portion of a powder layer placed on a shaping table to sinter or melt the specified portion; (ii) adding  another solidified layer and (iii) repeating the steps to produce a three-dimensionally shaped object. The ambient gas is partially removed during the process. (RDC 6/6/2012)

4. 8,187,521 
Method and device for producing three-dimensional objects
 
Larsson and Anders of Arcam, Sweden, developed a method for producing three-dimensional objects from a powder material which is capable of solidification by irradiation with a high-energy beam.  The powder is pre-heated material by scanning with the high-energy beam along predetermined paths over a pre-heating area so that consecutive paths are separated by a minimum security distance which is adapted to prevent undesirable summation effects in the pre-heating area, and then solidifying the powder material by fusing together the powder material. (RDC 6/6/2012)

3. 8,186,990 
Device for a layerwise manufacturing of a three-dimensional object
 
Perret et al of EOS, Germany, developed a device for manufacturing a three-dimensional object by a layer wise solidification of a building material at positions in the respective layers that correspond to the object is provided.  A feed that supplies the building material to a building space  in the device and at least two filler portions that are provided at the feed and are independent from one another are provided, wherein one connector is provided for each building material supply container in order to supply the building material from outside of the device. (RDC 6/4/2012)

2. 8,137,739 
Apparatus and method for the manufacture of a three-dimensional object
Philippi, Halder and Mattesn of EOS, Germany, developed  a method for the manufacture of three-dimensional objects (3) by local solidification of layers of a building material at positions corresponding to the respective cross-section of the object (3), by exposure to electromagnetic or particle radiation. The process is controlled by a  non-contact measurement of the temperature of the building material.  This apparatus can be used to actively access a not exposed region of the surface for measuring the temperature of each layer and to detect a temperature distribution by altering the position of a measurement region in a layer.  (RDC 5/15/2012)

1. 8,137,609 
Apparatus and method for cooling part cake in laser sintering
 
McAlea, Pang and Tummala of 3D Systems, South Carolina, developed a laser sintering system is which a part cake defining a build produced by laser sintering and the surrounding unfused powder is contained in an enclosure, and the enclosure includes displaceable wall portions for compressing the part cake to support the build against distortion during rapid cooling from a cooling fluid.  The enclosure enables the part cake to be quickly and reliably cooled either within the laser sintering system or outside the laser sintering system.  A source of cooling fluid connects to the enclosure and a lid holds the part cake in place as cooling fluid is forced through the pore volume of the cake.  An inert gas blanket apparatus is also provided to reduce or prevent oxidation of the part cake and/or to cool the part cake. Once the part cake is cooled, the build produced by laser sintering may be removed from the part cake.  (RDC 5/14/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

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Tel: 610 363 9920
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E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 5/14/2012.