Reheating A Ppsf Part; Reheating With The Modeler Oven; Reheating With A Convection Or Consumer Oven - Stratasys FORTUS 360mc Manual

Reheating a PPSF Part

If you cannot remove the supports immediately after building a part, or if the
part cools in the support removal process, you can reheat the part to make
support removal easier. How long you reheat the part depends on the part's
geometry. A small, thin-line walled part may take five to ten minutes to
reheat; a larger part with a greater mass may take 15 or more minutes to
reheat. It is not harmful to leave a part in the modeler for an extended time if
the part needs more hours to reheat.
The part mass and part temperature affect how long it takes for the part to
cool; you may have to reheat the part more than once. You can use any oven
to reheat PPSF_S, including a convection or consumer oven, convection or
non-convection laboratory oven. You can also use a hot air gun. The best
choice is based on your company's needs. See the various heating methods
below.

Reheating with the Modeler Oven

Stratasys recommends using the modeler oven to reheat a part because of its
temperature control and effective airflow. Place the part on the vacuum platen
when reheating. Do not put the part underneath the Z stage; the bottom of the
oven may get too hot for the part to withstand.
Note: Do not build another part in the modeler while
reheating a part.
The time needed to reheat a PPSF part is determined by four factors: the oven
temperature, the part mass, the heat transfer rate in the oven, and the time
spent in the oven. The modeler allows the hot air to disperse, which speeds up
the heat transfer.
Note: The modeler oven is controlled by ± five degrees. If you
choose to use another oven controlled outside ± five degrees,
you will need to lower the operating temperature by the oven
tolerance range.

Reheating with a Convection or Consumer Oven

A convection oven will best mimic the modeler oven. Heat a convection oven
to 200° C (392° F) to reheat PPSF. The two disadvantages of using a convection
oven are the small cavity and the small oven control tolerance band. If you use
a consumer oven, reheat the part to 195° C (383° F).
A-10
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