31results about How to "Enhance or speed the refilling of the build region" patented technology

A three dimensional object includes (a) a light polymerized first component; and (b) a second solidified component different from the first component. The object is preferably of a polymer blend formed from the first component and the second component, with the polymer blend as an interpenetrating polymer network, a semi-interpenetrating polymer network, or a sequential interpenetrating polymer network. In some preferred embodiments, the second component does not contain a cationic polymerization photoinitiator. In some preferred embodiments, the three dimensional object is produced by the process of continuous liquid interface production.

A method of forming a dual cure three-dimensional object by additive manufacturing may be carried out by mixing a first precursor liquid and a second precursor liquid to produce a polymerizable liquid comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component (e.g., a second reactive component) that is different from the first component (e.g., that does not contain a cationic photoinitiator, or is further solidified by a different physical mechanism, or further reacted, polymerized or chain extended by a different chemical reaction). In the foregoing: (i′) at least one reactant of the second solidifiable component is contained in the first precursor liquid, and (ii′) at least one reactant or catalyst of the second solidifiable component is contained in the second precursor liquid. Once mixed, the three-dimensional object may be formed from the resin by a dual cure additive manufacturing process.

A method of forming a three-dimensional object, which method includes a cleaning or washing step, is carried out by: (a) providing a carrier and a fill level, and optionally an optically transparent member having a build surface defining the fill level, the carrier and the fill level having a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from the first component; (c) irradiating the build region with light, to form a solid polymer scaffold from the first component and also advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object and containing the second solidifiable component carried in the scaffold in unsolidified and / or uncured form; (d) washing the three-dimensional intermediate; and (e) concurrently with or subsequent to the irradiating step, and / or the washing step, solidifying and / or curing the second solidifiable component in the three-dimensional intermediate to form the three-dimensional object.

Provided herein according to some embodiments is a method of forming a three-dimensional object, comprising: (a) forming a first intermediate object from a first polymerizable liquid; (b) forming a second intermediate object from a second polymerizable liquid; (c) optionally washing said first intermediate and said second intermediate; (d) contacting said first intermediate object to said second intermediate object; and then, (e) solidifying and / or curing a second solidifiable component (e.g., said second reactive component) in each of said first and second intermediate objects while said first and second intermediate objects are in contact with one another to couple said first and second intermediate objects to one another and form said three-dimensional object.

A method of forming a three-dimensional object is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween, with the carrier positioned adjacent and spaced apart from the build surface at a start position; then (b) forming an adhesion segment of the three-dimensional object (c) optionally but preferably forming a transition segment of the three dimensional object; and then (d) forming a body segment of the three dimensional object. In each case, the segment can be formed by: (i) filling the build region with a polymerizable liquid, (ii) continuously or intermittently irradiating the build region with light through the optically transparent, and (iii) continuously or intermittently advancing the carrier away from the build surface, to thereby form that segment from the polymerizable liquid.

Provided herein is a method of forming a three-dimensional object, comprising: (a) providing a carrier and a fill level having a build region therebetween; (b) filling said build region with a polymerizable liquid comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component; (c) irradiating said build region with light to form a solid polymer scaffold from said first component and also advancing said carrier away from said build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, said three-dimensional object and containing said second solidifiable component carried in said scaffold in unsolidified and / or uncured form; and (d) solidifying and / or curing said second solidifiable component in said three-dimensional intermediate. The solidifying and / or curing step (d) may increase the elasticity and / or decrease the rigidity of said intermediate in forming said three-dimensional object.

A method of forming a three-dimensional object, is carried out by: providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; filling the build region with a polymerizable liquid, intermittently irradiating the build region with light through the optically transparent member to form a solid polymer from the polymerizable liquid, and continuously or intermittently advancing the carrier away from the build surface to form the three-dimensional object from the solid polymer. In some embodiments, the filling, irradiating, and / or advancing steps are carried out while also concurrently: (i) continuously maintaining a dead zone of polymerizable liquid in contact with the build surface, and (ii) continuously maintaining a gradient of polymerization zone between the dead zone and the solid polymer and in contact with each thereof, the gradient of polymerization zone comprising the polymerizable liquid in partially cured form.

Described herein are methods and apparatus for the production of a three-dimensional object by “bottom up” additive manufacturing, in which a carrier (112) is vertically reciprocated with respect to a build surface, to enhance or speed the refilling of the build region with a solidifiable liquid. In preferred embodiments, the three-dimensional object is produced from a liquid interface by continuous liquid interface production (i.e., “CLIP”).

A method of forming the body portion of a three-dimensional object from a polymerizable liquid by the process of continuous liquid interface printing is described. The body portion has a plurality of contiguous segments, and the process includes advancing a carrier for the object away from a build surface while irradiating a build region between the carrier and build surface in a pattern of advancing and irradiating defined by an operating mode. In the present invention, the operating mode is changed at least once during the formation of the body portion for different contiguous segments of the body portion.

Provided herein according to some embodiments is a method of forming a three-dimensional object, comprising: (a) forming a first intermediate object from a first polymerizable liquid; (b) forming a second intermediate object from a second polymerizable liquid; (c) optionally washing said first intermediate and said second intermediate; (d) contacting said first intermediate object to said second intermediate object; and then, (e) solidifying and / or curing a second solidifiable component (e.g., said second reactive component) in each of said first and second intermediate objects while said first and second intermediate objects are in contact with one another to couple said first and second intermediate objects to one another and form said three-dimensional object.

A method of forming a three-dimensional object includes: providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; filling the build region with a polymerizable liquid, irradiating the build region with light through the optically transparent member to form a solid polymer from the polymerizable liquid, and advancing said carrier away from said build surface to form said three-dimensional object from said solid polymer. The irradiating step includes projecting focused light at the build region, and the advancing step is carried out at a rate that is dependent on an average light intensity of the focused light. An apparatus to perform the method is also disclosed.

A method of forming a three-dimensional object, is carried out by: providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; filling the build region with a polymerizable liquid, intermittently irradiating the build region with light through the optically transparent member to form a solid polymer from the polymerizable liquid, and continuously or intermittently advancing the carrier away from the build surface to form the three-dimensional object from the solid polymer. In some embodiments, the filling, irradiating, and / or advancing steps are carried out while also concurrently: (i) continuously maintaining a dead zone of polymerizable liquid in contact with the build surface, and (ii) continuously maintaining a gradient of polymerization zone between the dead zone and the solid polymer and in contact with each thereof, the gradient of polymerization zone comprising the polymerizable liquid in partially cured form.