Apparatus for producing an object using stereolithography

Details Apparatus for producing an object using stereolithography Apparatus for producing an object using stereolithography

1996-04-24

1997-09-09

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Radiated energy

118623, 118100, 118120, B29C 3508, B29C 6700

Patent

active

056654014

ABSTRACT:
An apparatus for producing an object using stereolithography includes a container, a bath of a liquid or powder material filling the container and having a free surface, the material being solidifiable under the action of electromagnetic radiation, a support for positioning the object relative to the free surface of the bath so as to form a layer of the material adjacent to the free surface, a device for solidifying the layer using electromagnetic radiation, a wiper device extending along a first direction across the free surface and drive means for moving the wiper device across the free surface along a second direction. In order to achieve optimum wiping conditions the wiper device has a leading first surface portion and a trailing second surface portion when moving along the second direction, the first and second surface portions extending in the first direction, the first surface portion having a first surface tension value and the second surface portion having a second surface tension value different from the first surface tension value.

REFERENCES:
patent: 5044306 (1991-09-01), Erdmann
patent: 5174931 (1992-12-01), Almquist et al.
patent: 5330574 (1994-07-01), Nakagawa et al.
patent: 5358673 (1994-10-01), Heller et al.
patent: 5573721 (1996-11-01), Gillette

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