A method of forming a model of a porous structure includes three dimensionally printing a mold of the porous structure using a polycaprolactone mold material, filling the mold with a polymer mixture, and heating the filled mold at a temperature above a melting temperature of the mold material to cure the polymer mixture, where the cured polymer mixture forms the model of the porous structure.

A method of forming a model of a porous structure includes three dimensionally printing a mold of the porous structure using a polycaprolactone mold material, filling the mold with a polymer mixture, and heating the filled mold at a temperature above a melting temperature of the mold material to cure the polymer mixture, where the cured polymer mixture forms the model of the porous structure.

Composition and method for making a multi-layer bio-based film having one or more cavitated layers. In one aspect, the multilayer flexible film has polylactic acid, an inorganic filler, and a cavitation stabilizer making up at least one film layer. In one aspect, the barrier web has a cavitated bio-based film layer. In another aspect, the print web has a cavitated bio-based film layer.

A process for the manufacture of anatomical models which, from images obtained and the creation of editable and printable files, includes a sub-process for generating main moulds, a sub-process for generating internal elements, a sub-process for positioning the internal elements which when these include soft elements comprises a step of reversible stiffening, a sub-process for integrating the internal elements comprising a step of pouring of parenchyma and an demoulding step and a post-processing sub-process.

The disclosure herein includes methods for producing an anatomical model, which method may include: providing a mold assembly, which mold assembly may include: a first mold portion having an outer surface and an inner surface; and a second mold portion having an outer surface and an inner surface; disposing a lining material on either a portion of the inner surface of the first mold portion or a portion of the inner surface of the second mold portion, or both; forming a first cavity between the inner surface of the first mold portion and the inner surface of the second mold portion; positioning a portion of an insert in the first cavity; introducing a first material into the first cavity; removing a portion of the insert to expose a second cavity inside the mold assembly; and introducing a second material into the second cavity.

A method of molding an article includes positioning a dissolvable insert within a mold, filling the mold with material to form an article within the mold and about the dissolvable insert, and at least partially dissolving the dissolvable insert from within the article. The dissolvable insert forms internal features of the article and includes a porous core.

Embodiments of the present invention relates to an acoustic metamaterial, as well as to a method for manufacturing the same. The acoustic metamaterial includes a plurality of channels or columns each having the same cross-section with a hydraulic radius between 5 and 300 ?m, which channels or columns are arranged with a periodic spacing between 2 and 600 ?m. This results in a highly dense network that can provide optimal acoustic absorption and/or impedance over a wide frequency range. The method for manufacturing the same includes additive manufacturing with a plurality of consecutive material deposition steps to form, in each step, a layer comprising a plurality of periodically repeated cells separated by walls. The layers deposited in the consecutive material deposition steps are stacked with their respective cells aligned to form channels.

A device for polymerizing lactams in molds includes a hopper for storing solid lactam and a lactam feeding component that includes a plasticizing screw so as the lactam to be melted and simultaneously taken in a dosed manner to a mixing chamber. The device further includes a first dosing component to feed a liquid initiator, and a second dosing component to feed a liquid activator. The mixing chamber is configured to receive in a dosed manner the lactam, the initiator, and the activator from the feeding and dosing components. The mixing chamber has three separate inlets to receive, separately, the lactam, the initiator, and the activator, to allow them to flow into the mixing chamber coming into contact with one another for the first time, at the moment immediately prior to entering into a mold located adjacent the chamber and arranged for the polymerization reaction to take place inside the mold.

A method for producing a three-dimensional (3D) object having excellent moldability and mechanical characteristics is provided. The method includes a molding step of irradiating a composition filled in the cavity of a mold with electromagnetic waves having a wavelength of from 0.01 m to 100 m, and molding the composition into the 3D object. The composition for molding a 3D object contains a solvent and at least one of a polymer and a polymerizable monomer.