Printing 3D-objects by inkjet
AssigneeKornit Digital Ltd.
InventorsLahav Langboim, Jacob Mann
Life of this patent
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Abstract
Provided herein is a process for forming a 3D object on a substrate using liquid inkjet compositions, machinery and methodologies, devoid of dry powders or UV-curable agents. The 3D object is digitally printed according to the additive approach, by inkjet printing a top layer over a base layer before curing the base layer, whereas a layer is formed as a gel, and the gelatinous object is thereafter cured.
Claims14
A process of forming a three-dimensional object on a surface of a substrate, comprising:
- (a) inkjet printing a pattern on an area of the surface using a layer-forming composition and a jellification composition, thereby forming a first gelatinous layer;
- (b) repeating step (a) on said first gelatinous layer, thereby forming a second gelatinous layer on said first gelatinous layer;
- (c) repeating step (b) n-times so as to form an nth gelatinous layer on said second gelatinous layer, thereby forming a three-dimensional gelatinous object wherein n is an integer equal to or greater than 1, and
- (d) curing said three-dimensional gelatinous object, thereby forming the three-dimensional object,
- wherein each of said layer-forming composition and said jellification composition is devoid of a UV-curable agent;
- and
- wherein said layer-forming composition is characterized by a viscosity that ranges 4-25 cps at 25° C.
A process of forming a three-dimensional object on a surface of a substrate, comprising:
- (a) inkjet printing a pattern on an area of the surface using a layer-forming composition and a jellification composition, thereby forming a first gelatinous layer;
- (b) repeating step (a) on said first gelatinous layer, thereby forming a second gelatinous layer on said first gelatinous layer;
- (c) repeating step (b) n-times so as to form an nth gelatinous layer on said second gelatinous layer, thereby forming a three-dimensional gelatinous object wherein n is an integer equal to or greater than 1, and
- (d) curing said three-dimensional gelatinous object, thereby forming the three-dimensional object,
- wherein:
- each of said layer-forming composition and said jellification composition is devoid of a UV-curable agent, and
- said jellification composition comprises a gelling initiator, said gelling initiator is a transitory acid, and the pH of said jellification composition ranges 3-6.5.
A process of forming a three-dimensional object on a surface of a substrate, comprising:
- (a) inkjet printing a pattern on an area of the surface using a layer-forming composition and a jellification composition, thereby forming a first gelatinous layer;
- (b) repeating step (a) on said first gelatinous layer, thereby forming a second gelatinous layer on said first gelatinous layer;
- (c) repeating step (b) n-times so as to form an nth gelatinous layer on said second gelatinous layer, thereby forming a three-dimensional gelatinous object wherein n is an integer equal to or greater than 1, and
- (d) curing said three-dimensional gelatinous object, thereby forming the three-dimensional object,
- wherein:
- each of said layer-forming composition and said jellification composition is devoid of a UV-curable agent;
- and
- Step (d) is effected by heating said three-dimensional gelatinous object to a temperature ranging 90-200° C.
Dependencies are inferred from the claim text.