Apparatus, system, and method for use in three-dimensional printing
The present invention concerns a reservoir assembly for use in three-dimensional (3D) printing for building a 3D object, which includes a top frame that may be filled with liquid material, and a tensioned film being held underneath the top frame. The tensioned film may be air permeable and elastic at the same time, wherein surfaces of the tensioned film are micro textured so that the tensioned film becomes optically clear when it contacts with the liquid material. The tensioned film minimizes the creation of bubbles between the top and bottom surfaces. This also helps blurring the boundaries thereby enhancing the surface finish of the fabricated parts.
1. A reservoir assembly for use in three-dimensional printing, comprising:
a top frame having a cavity with an aperture defined on a bottom edge of the top frame, the cavity configured to be at least partially filled with a photosensitive liquid;
a permeable tensioned film stretchily coupled to the aperture so as to hold the photosensitive liquid within the cavity of the top frame;
a bottom frame including a transparent or semi-transparent rigid substrate, the bottom frame configured to register with the top frame; and
a media layer disposed between the permeable tensioned film and the rigid substrate of the bottom frame, the permeable tensioned film detached from and suspended above the media layer.
2. The reservoir assembly of claim 1 , further comprising a deep portion of the cavity configured to collect the photosensitive liquid, the deep portion defined by:
a peripheral shallow portion extending from an inner side wall of the top frame to a curving edge; and
a deep inner side wall extending from the curving edge that perimetrically defines the aperture.
3. The reservoir assembly of claim 1 , wherein the permeable tensioned film includes polymethylpentene.
4. The reservoir assembly of claim 1 , wherein the permeable tensioned film includes a non-stick surface.
5. The reservoir assembly of claim 1 , wherein the permeable tensioned film is wrapped around and secured about a holding rim of the top frame.
6. The reservoir assembly of claim 1 , wherein the permeable tensioned film is adhered and secured to the top frame using a double-sided adhesive tape.
7. The reservoir assembly of claim 1 , wherein the media layer consists of one or more selected from the group of: a gas, a liquid, and a semi-liquid.
8. The reservoir assembly of claim 7 , wherein:
the gas comprises air, oxygen, or nitrogen;
the liquid comprises water, or oil; and
the semi-liquid comprises a gel, or a rubber material.
9. The reservoir assembly of claim 2 , further comprising at least one visual indicator situated on a surface of the peripheral shallow portion of the top frame.
10. The reservoir assembly of claim 2 , further comprising a force-generating mechanism coupled between the top frame and the bottom frame configured to facilitate a separation process during three-dimensional printing.
11. The reservoir assembly of claim 1 , further comprising a gas supply module coupled to the bottom frame.
12. A reservoir assembly for use in three-dimensional printing, comprising:
a top frame having a cavity with an aperture defined on a bottom edge of the top frame, the cavity configured to be at least partially filled with a photosensitive liquid, wherein a deep portion of the cavity is defined by a peripheral shallow portion extending from an inner side wall of the top frame to a curving edge, and a deep inner side wall extending from the curving edge that perimetrically defines the aperture;
a polymethylpentene (PMP) film wrapped around or adhered to a holding rim of the top frame so that the PMP film is tensionedly coupled to the aperture in a manner to hold the photosensitive liquid within the cavity of the top frame;
a bottom frame including a transparent or semi-transparent rigid substrate, the bottom frame configured to register with the top frame; and
a media layer disposed between the permeable PMP film and the rigid substrate of the bottom frame, the media layer including a clearance between a top surface of the transparent or semi-transparent rigid substrate and a bottom surface of the PMP film, the PMP film detached from and suspended above the media layer.