WEBVTT

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The
numerous medical benefits

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of printing three-dimensional opaque

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or colored medical molds and
models can be accomplished

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through Binder Jetting technology.

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At Walter Reed National
Military Medical Center,

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technicians design objects
which include veins,

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arteries, and other pathology

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where color can emphasize a
distinct anatomical feature.

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Binder Jetting printers use two materials;

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a powder, typically gypsum, and a binder.

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Once the technician loads the model

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from an external software program,

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the printing process begins

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on a platform of layered powder.

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Multiple print heads move horizontally

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along the X and Y axis
of the build surface,

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applying a bonding agent
and color to the powder.

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As the material hardens,
the platform lowers

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and a new layer of gypsum
is drawn across the bed.

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Throughout this process the
object is self-supported

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within the powder bed, and
once the part is completed,

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the remaining unbound
material can be eliminated

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with a vacuum and then recycled.

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Upon removing the fragile
model from the bed,

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the operator clears away
most of the surface powder

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by using a brush or a vacuum.

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Then, any remaining residual
material is blown off

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with compressed air inside
an enclosed chamber.

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Once this process is completed,

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the brittle surface is hardened

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by applying a layer of cyanoacrylate,

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a strong, fast acting adhesive,
over the entire object.

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Due to the sensitive nature

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of the binding materials utilized

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in Binder Jetting technology,
these systems are best suited

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to service patients,
by the fabrication of molds

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for facial prosthesis, as
well as supporting providers

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through the building of colored
anatomical training models

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and medical simulators.

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