According to some aspects, a method is provided of casting an object from a mold, the method comprising obtaining a mold comprising a hollow shell of rigid material, the material comprising a thermoset polymer having a plurality of pores formed therein, providing a metal and/or ceramic slurry into an interior of the mold, exposing at least part of the mold to a low pressure environment so that a net flow of gas is produced from the interior of the mold into the low pressure environment. According to some aspects, a method of forming a porous mold is provided. According to some aspects, a photocurable liquid composition is provided, comprising a liquid photopolymer resin, particles of a solid material, in an amount between 30% and 60% by volume of the composition, and a water-soluble liquid.

A hybrid mandrel for forming a composite part may comprise a core and a sleeve located around the core. The core may include a rigid material. The sleeve may comprise an elastomeric material. The part may be formed by locating the hybrid mandrel in an injection mold, depositing a molten resin around the hybrid mandrel, curing the molten resin; and removing the hybrid mandrel.

A casting mould comprising: an inorganic or refractory mould, wherein the mould is configured to receive feedstock; wherein the feedstock is configured to be heated in situ. A reusable mould, reusable susceptor, and/or release agent may be incorporated. Method of manufacturing a mould, and casting a part employing 5 in situ heating, are also provided.

A high-quality multilayer thermoplastic-resin-reinforced sheet material having excellent mechanical properties and drapeability in which a thermoplastic resin excellent in recycling efficiency and shock resistance is used as a matrix. A thermoplastic-resin multilayer reinforced molding formed of the multilayer thermoplastic-resin-reinforced sheet material, in which the high quality and the mechanical properties are maintained. The multilayer thermoplastic-resin-reinforced sheet material (11) is formed by stacking thermoplastic-resin-reinforced sheet materials (21A) to (21D) each formed of a reinforcing-fiber sheet material (31), consisting of a plurality of reinforcing fibers (31f) arranged in a predetermined direction in a sheet-like structure, and a thermoplastic-resin sheet material (41) joined to a surface of the reinforcing-fiber sheet material (31), and stitching them together with an integration thermoplastic-resin fiber tow (51) composed of the same material as the thermoplastic-resin sheet material (41). The reinforcing-fiber sheet materials (31) are stacked such that their reinforcing directions are multiaxial.

The present invention relates to a method for mould production including: preparing a first core made of polystyrene; shaping the first polystyrene core, thereby obtaining a first shaped core; executing a first thermoforming operation to coat the first shaped core with a first thermoformable thermoplastic material, thereby obtaining a first coated structure.

Method of manufacturing moulding elements (5) intended to be assembled in a mould for moulding a tire tread, the method comprising: a) a step of aligning a plurality of basic elements (1) on a basic support (4); b) during the alignment step, a step of placing at least one insert (9) between two adjacent basic elements in the alignment, the insert comprising an external part (10) projecting from the two basic elements in a direction away from the basic support (4) and an internal part (11) separating the two basic elements; c) a step of obtaining an intermediate support (3); and d) a step of obtaining at least two moulding elements (5), the two moulding elements (5) being separated by the internal part (11) of the insert (9).

According to some aspects, a method is provided of casting an object from a mold, the method comprising obtaining a mold comprising a hollow shell of rigid material, the material comprising a thermoset polymer having a plurality of pores formed therein, providing a metal and/or ceramic slurry into an interior of the mold, exposing at least part of the mold to a low pressure environment so that a net flow of gas is produced from the interior of the mold into the low pressure environment. According to some aspects, a method of forming a porous mold is provided. According to some aspects, a photocurable liquid composition is provided, comprising a liquid photopolymer resin, particles of a solid material, in an amount between 30% and 60% by volume of the composition, and a water-soluble liquid.

According to some aspects, a method is provided of casting an object from a mold, the method comprising obtaining a mold comprising a hollow shell of rigid material, the material comprising a thermoset polymer having a plurality of pores formed therein, providing a metal and/or ceramic slurry into an interior of the mold, exposing at least part of the mold to a low pressure environment so that a net flow of gas is produced from the interior of the mold into the low pressure environment. According to some aspects, a method of forming a porous mold is provided. According to some aspects, a photocurable liquid composition is provided, comprising a liquid photopolymer resin, particles of a solid material, in an amount between 30% and 60% by volume of the composition, and a water-soluble liquid.

Provided is a manufacturing method of a pattern sheet having excellent productivity at low costs. The manufacturing method of a pattern sheet includes: a process of producing, using a plate precursor having a protruding pattern formed thereon, a plurality of first molds having a recessed shape, which is an inverted shape of the protruding pattern, from a resin; a process of producing a plurality of metallic electroforms having the protruding pattern formed thereon by electroforming using the first mold; a process of producing a plurality of second molds having a recessed shape, which is an inverted shape of the protruding pattern, from a resin using the electroform; and a process of producing pattern sheets and having a protruding pattern formed thereon using the second mold.

A multi-part mold formed from a shell mold and a mold base provides efficiency in a manufacturing process. The shell mold may be formed on a positive mold article. The positive mold article may be formed from a rapid manufacturing process. The shell mold may then be formed on a surface of the positive mold article through a coating process that builds a relatively thin coating that results in a mold surface for molding an object represented, at least in part, by the positive mold article. The shell mold is then joined with a mold base effective to support the shell mold for the molding operation.