Global Filtration Systems

Sprintray Inc.

Global Filtration Systems, a Dba of Gulf Filtration Systems Inc.

Mohamad Janbain

Ali El-Siblani

Alexandr Shkolnik

Alexander Nam

Kirin Xu

Ali Ei-Siblani

Apparatuses and methods for making at three-dimensional object from a solidifiable material are shown and described. A pattern generator comprising at least one lens transmits light to a photopolymer that solidifies by curing, cross-section by cross-section, in the shape of received patterns of light. The photopolymer curing reactions are exothermic and generate heat within the solidifiable material, causing portions of it to vaporize. A crossflow blower, sometimes referred to as an 'air curtain' or “tangential blower”, blows air across the lenses to isolate the lenses from the photopolymer vapors, which prevents the vapors from condensing or otherwise depositing on the lenses. Prevention of such condensation or deposition reduces the likelihood of image distortion and/or reductions in projected light intensity.

Air curtain for photopolymer 3D printer

A method and apparatus for making a three-dimensional object by solidifying a solidifiable material are shown and described. A photohardening inhibitor is admitted into a surface of a photohardenable material to create a 'dead zone' where little or no solidification occurs. The dead zone prevents the exposed surface of the photohardenable material from solidifying in contact with a container bottom or film. As the solidified object areas get larger and the build platform speed increases, the dead zone increases which can cause the formation of channels in the resulting objects and delamination. A number of techniques including continuous/discontinuous mode switching, multiple illuminations of portions of the same layer, and the use of gray scaling are disclosed for regulating the size of the dead zone.

Method of making three-dimensional objects using both continuous and discontinuous solidification

A method and apparatus for making a three-dimensional object by solidifying a photohardenable material are shown and described. A photohardening inhibitor is admitted into a surface of a photohardenable material through a flexible film to create a 'dead zone' where little or no solidification occurs. The dead zone prevents the exposed surface of the photohardenable material from solidifying in contact with the film. The inhibitor causes the film to deform along the build axis, thereby creating a non-planar interface between the photohardednable material and the film. A method is provided to compensate the three-dimensional object data based on the deformation of the film.

Method of compensating for inhibitor permeable film deformation in the manufacture of three-dimensional objects

An apparatus and method for making a three-dimensional object from a solidifiable material using a linear solidification device and contourless object data is shown and described. A voxel matrix is superimposed over an object model defined by three-dimensional object data to determine active voxels that intersect at least a portion of the object model. The active voxels are related to a path generation reference frame of an apparatus for making a three-dimensional object to generate solidification energy source event data that defines scanning (y) axis locations and/or solidification times at which a linear solidification device supplies solidification energy to a solidifiable material.

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Oberhausen, Germany

Mohamad Janbain