Multi-material separation layers for additive fabrication
AssigneeFormlabs, Inc.
InventorsMarcin Slaczka, Benjamin FrantzDale, Ian Ferguson
Life of this patent
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Abstract
According to some aspects, a container is provided for use in an additive fabrication device configured to fabricate parts by curing a liquid photopolymer to form layers of cured photopolymer. The container may comprise a laminated multi-material layer having an elastic first layer that aids in separation of cured photopolymer from the container in addition to a barrier layer on an upper surface that protects the first layer from exposure to substances in the liquid photopolymer that may not be compatible with the material of the first layer.
Claims20
A container for use in an additive fabrication device configured to fabricate parts by curing a liquid photopolymer to form layers of cured photopolymer, the container comprising:
- an open-topped vessel having an interior bottom surface, at least a region of the interior bottom surface being transparent to at least one wavelength of actinic radiation;
- and
- a laminated multi-material layer bonded to the interior bottom surface of the vessel and configured to facilitate separation of the cured photopolymer from an exposed surface of the laminated multi-material layer, the laminated multi-material layer comprising:
- a first material layer bonded to at least a portion of the region of the interior bottom surface;
- and
- a second material layer bonded to at least a portion of the first material layer, the second material layer having an oxygen permeability of at least 10 Barrer and forming the exposed surface of the container.
An additive fabrication device configured to fabricate parts by curing a liquid photopolymer to form layers of cured photopolymer, the additive fabrication device comprising:
- at least one source of actinic radiation configured to produce actinic radiation that includes radiation of a first wavelength;
- a photopolymer container, comprising:
- an open-topped vessel having an interior bottom surface, at least a region of the interior bottom surface being transparent to the first wavelength of the actinic radiation;
- and
- a laminated multi-material layer bonded to the interior bottom surface of the vessel and configured to facilitate separation of the cured photopolymer from an exposed surface of the laminated multi-material layer, the laminated multi-material layer comprising:
- a first material layer bonded to at least a portion of the transparent region of the interior bottom surface;
- and
- a second material layer bonded to at least a portion of the first material layer, the second material layer having an oxygen permeability of at least 10 Barrer and forming the exposed surface of the container.
The additive fabrication device of claim 14, wherein the second material layer comprises polymethylpentene (PMP).
The additive fabrication device of claim 14, wherein the second material layer has a higher selectivity for oxygen than for any compound of the liquid photopolymer.
The additive fabrication device of claim 14, wherein the first material layer comprises polydimethylsiloxane (PDMS).
The additive fabrication device of claim 14, wherein the first material layer has an oxygen permeability of at least 200 Barrer.
The additive fabrication device of claim 14, wherein the second material layer has an oxygen permeability between 20 Barrer and 50 Barrer.
Dependencies are inferred from the claim text.