Method for removing resin residues from a model created by three-dimensional 3D printing, including the steps of creating a three-dimensional model through three-dimensional 3D printing, inserting the model into a container (10), introducing a solvent (24) into the container (10) and moving the container (10) with the solvent (24) and the model by means of repeated linear movements. The application further relates to a container (10) for removing resin residues from a model created through three-dimensional 3D printing, the container (10) including a tank (20) adapted to contain a solvent (24), a cover (30) adapted to close the tank (20) and means (38) for sealing the cover (30) to the tank (20), wherein the cover (30) includes or is a base (32) of three-dimensional 3D printer, the base (32) including one or more anchoring elements (34) for a three-dimensional model.

A system for manufacturing a three-dimensional object facilitates the removal of support material from the object. The system includes a controller configured to move a platen to position the object at a position opposite a microwave radiator and then operate the microwave radiator to change the phase of the support material from solid to liquid. The controller either monitors the expiration of a predetermined time period or a temperature of the object to determine when the microwave radiator operation is terminated. The microwave radiation does not damage the object because the support material has a dielectric loss factor that is greater than the dielectric loss factor of the object.

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.

Impact-dissipating liners, helmets having an impact-dissipating liner, and methods of fabricating impact-dissipating liners are provided. The liners include a fluid impermeable enclosure having cavities with sidewalls and a fluid contained in the enclosure. The enclosure may have a central portion and lobes extending from the central portion, wherein the central portion and the lobes are adapted to conform to the shape of an internal surface of a helmet. The helmets may include bodies positioned within the cavities of the liner, where, under impact loading, contact between the bodies and the liner absorbs at least some of the energy of the impact loading. Aspects of the invention are particularly adapted for use for head protection, such as, helmets; however, aspects of the invention are also adaptable to provide impact-dissipation for any body or surface that would benefit from such protection.

A method of infusing, infiltrating or impregnating a three dimensional printed, free-form fabricated or additive manufactured object having pores or voids in or between particles or sheets of material from which the object is manufactured may include infusing the object with a thermoplastic material. The thermoplastic material may be a linear or branched semi-crystalline aliphatic polyester with a melting point of between 40 C. and 65 C. which may have a solidification/crystalisation point between 20 C. and 40 C., and which may be introduced under controlled conditions of temperature and pressure. The thermoplastic material may be caused to penetrate the object by immersing the object in the thermoplastic material and controlling the frequency and amplitude of pressure oscillation to ensure sufficient infusion into the object to penetrate the pores or voids by at least 10% and bond particles or sheets of material from which the object is manufactured.

3D-printed parts may include binding agents to be removed following an additive manufacturing process. A debinding process removes the binding agents by immersing the part in a solvent bath causing chemical dissolution of the binding agents. The time of exposure of the 3D-printed part to the solvent is determined based on the geometry of the part, wherein the geometry is applied to predict the diffusion of the solvent through the 3D-printed part. The 3D-printed part is then immersed in the solvent bath to remove the binding agent, and is removed from the solvent bath after the time of exposure.

The invention discloses a process for the preparation of a biodegradable stent which involves deforming an extruded biodegradable polymer tube axially at a first predefined temperature by applying an axial force for a first predefined time interval. The process is followed by radially expanding the axially stretched tube at a second predefined temperature by pressurizing the tube with an inert gas in one or more stages, the pressure applied in each successive stage being higher than the pressure applied in a previous stage. The process further comprises laser cutting a specific pattern of scaffold structure on the expanded tube and then crimping the laser cut stent on the balloon of delivery catheter in a sterile environment in multiple stages.

Multilayer silicone composites with precise thickness are produced by sequential extrusion of curable silicone films, and partially but not fully crosslinking a preceding silicone film prior to extruding a next subsequent film.

A method of forming a three-dimensional object is described. The method may use a polymerizable liquid, or resin, useful for the production by additive manufacturing of a three-dimensional object, comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from said first component.

Process for selectively and locally treating the surface of a part, whereina part having a surface to be treated is provided, said surface being defined by a direction P and a direction Q; three-dimensional profilometric data are acquired from the surface to be treated, in order to obtain a set F1 of three-dimensional data on the surface to be treated, said set F1 associating a height with each point in the plane PQ; this set F1 of digital data is processed digitally with a view to subtracting said curves, to obtain a set F2 of reprocessed three-dimensional data; this set F2 of data is processed digitally, to obtain a set F3 of binary data on the surface to be treated, said digital processing attributing, to each point on the surface, a first binary value or a second binary value, depending on at least one criterion related to the height of the point on the surface; the surface is selectively and locally treated using said set F3 of binary data, said surface treatment being performed only at points on the surface the binary datum of which has said first or said second binary value.