The present disclosure relates to a mold core for use on a molding apparatus for the production of hollow and/or in particular tubular concrete bodies, and a molding apparatus comprising such a mold core. The mold core comprises a longitudinally extending wall of the core, which has a wall of the core from one end to the other end of the wall of the core in the longitudinal direction, an expansion device for expanding and/or spreading and/or contracting and/or shrinking the mold core, and a sealing element sealing the longitudinal opening of the wall of the core. The sealing element is provided with respective longitudinal edges of the wall of the core by means of a detachable connection, the sealing member being slidably connected to the two longitudinal edges of the wall of the core in the longitudinal direction, respectively.

A method of casting a product includes the steps of: creating a finished photopolymer mold; introducing liquid into the mold; hardening the liquid; and removing the photopolymer mold. A casting mold and a method of making a casting mold, are also disclosed.

A mold for building coating products obtained from composite liquid mixtures is described. The mold includes a base plate, having a plurality of through holes; and a die, configured for incorporating the base plate therein. On the upper surface of the die there are a plurality of shapes of the front surface in negative of each coating product to be manufactured and a molding grid open at the upper part, configured to be pressure applied above the die. The molding grid has side walls which define the perimeter edges of each coating product. Between the molding grid side walls separate bowls are formed for containing a single coating product. Each side wall is inclined at an acute angle with respect to a vertical plane, to confer to each side wall a sharp-pointed and tapered shape from top towards bottom with respect to the entire mold for facilitating the extraction of the finished coating products.

A mold assembly for manufacturing molded articles includes a plurality of mold portions that are comprised of a polymer and form a mold cavity. In embodiments, the polymer has a thermal conductivity (k) of less than about 0.5. Although, some embodiments may have higher conductivity values. In embodiments, the polymer comprises polycarbonate. Methods for making and using polymer mold portions and assemblies are also disclosed.

Tubular ceramic structures, e.g., anode components of tubular fuel cells, are manufactured by applying ceramic-forming composition to the external surface of the heat shrinkable polymeric tubular mandrel component of a rotating mandrel-spindle assembly, removing the spindle from the assembly after a predetermined thickness of tubular ceramic structure has been built up on the mandrel and thereafter heat shrinking the mandrel to cause the mandrel to separate from the tubular ceramic structure.

A mould (1) and accessories thereof for the forming of an orthopaedic spacer made of medical cement, defining a moulding cavity (2) delimited by a moulding surface (3) configured to impart a pre-established shape to the medical cement and to create the orthopaedic spacer, wherein at least one sector (6) of the forming mould (1) defining at least one portion of the moulding surface (3) is made with a thermoplastic copolymer based material.

A method for producing three-dimensional molded parts by means of layering, the moisture content of the build material mixture being able to be regulated.

A precast concrete floor panel having stems molded in a mold with stem mold cavities and a deck. The deck can be formed in the same mold that includes the stem mold cavities or the concrete for the deck can be poured and cured on-site after the stems have been removed from the mold. The mold can include mold segments made from an insulating material that can remain attached to the stems to insulate the finished floor panel.

The invention comprises a concrete form. The form comprises a first concrete forming panel having a first primary surface adapted for forming and contacting plastic concrete and a second primary surface opposite the first primary surface; a layer of insulating material contacting and substantially covering the second primary surface of the first concrete forming panel; and an insulating blanket adjacent the first concrete forming panel. A method of using the concrete form is also disclosed.

A method for manufacturing a three-dimensional fired body includes (a) a step of producing a shaping mold using an organic material, the shaping mold having a shaping space which has the same shape as a shaped body having a hollow portion that opens to an outer surface thereof, in which a core corresponding to the hollow portion is integrated with the shaping mold; (b) a step of producing the shaped body in the shaping mold by pouring a ceramic slurry into the shaping space and solidifying the ceramic slurry; (c) a step of drying and then degreasing the shaped body, in which the shaping mold is eliminated in any one of the following stages: before drying, during drying, after drying and before degreasing, during degreasing, and after degreasing of the shaped body; and (d) a step of firing the shaped body to obtain a three-dimensional fired body.