film, a cavity is provided, which is connected to a feeder , which is used to supply liquid or gas-like material in the
cavity. The semi-permeable film is impermeable to the photo-curing material but permeable to the supplied liquid or
gaseous substances. The semi-permeable film may be formed for example as transparent FEP (Fluorinated
Ethylene Propylene) film. These substances act as inhibitors for the polymerization in order to prevent
polymerisation of the contact surface of the film. In the preferred embodiment is when the inhibitors in acrylic-based
resins to oxygen or atmospheric air. In this case, there is no direct contact between the material to be consolidated
and the receiving surface. The liquid or gaseous material is pumped at atmospheric pressure or with a slight excess
pressure in the cavity, preferably continuously. To ensure that no created too much pressure a relief for the
respective medium is provided."
Statistics: Posted by keyanzhao — Fri Aug 15, 2014 9:20 am
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and flow back underneath the teflon (because it is heavier than the resin) once the freshly cured layer is released.
does that make sense ?
Statistics: Posted by erenaud — Wed Mar 12, 2014 6:02 pm
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Whatever liquid you use in this space it could be crictical to the UV light, right?
Statistics: Posted by Helmi — Wed Feb 26, 2014 3:45 am
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The gap is also very small, apparently 1mm.
As for the liquid pump and inflating method, wouldn't you get optical distortion when the light tries to pass through?
Statistics: Posted by AndersonTa — Mon Feb 17, 2014 3:24 am
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Maybe when the layer is printing the film is resting against the vat bottom and when the part raises the fluid is pumped in and the film raises off the vat bottom and then the fluid is pulled back out.
What do you guys think?
Statistics: Posted by Phife — Sun Feb 16, 2014 8:18 pm
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Statistics: Posted by 258cj7 — Tue Jan 28, 2014 10:46 pm
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