A manufacturing method of a concrete pile is shown. The method includes the following, that is, pouring concrete in the pile molding space, reducing the pile molding space to compress and mold the concrete, draining water drained from the concrete by compression and molding outside of the formwork from the drainage hole, and holding the concrete a predetermined amount of time to harden the concrete. The formwork includes an outer formwork that molds an outer wall surface of the concrete pile, an inner formwork that molds an inner wall surface of a hollow space of the concrete pile, and a pair of end formwork that mold upper and lower end surfaces of the concrete pile. The drainage hole is a gap between adjacent components when the mold is tightened, and the gap is configured to be capable of being opened larger during cleaning than when the mold is tightened.

A manufacturing method of a concrete pile is shown. The method includes the following, that is, pouring concrete in the pile molding space, reducing the pile molding space to compress and mold the concrete, draining water drained from the concrete by compression and molding outside of the formwork from the drainage hole, and holding the concrete a predetermined amount of time to harden the concrete. The formwork includes an outer formwork that molds an outer wall surface of the concrete pile, an inner formwork that molds an inner wall surface of a hollow space of the concrete pile, and a pair of end formwork that mold upper and lower end surfaces of the concrete pile. The drainage hole is a gap between adjacent components when the mold is tightened, and the gap is configured to be capable of being opened larger during cleaning than when the mold is tightened.

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.

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.

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.

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 method for forming a ceramic matrix composite bearing includes preparing a layup slurry from a mixture of water, pre-ceramic polymer and refractory filler. The method further includes forming a concentric stack of slurry-impregnated fabric sleeve layers over a rod-shaped inner mold and applying an outer mold to form a mold assembly. The method also includes heating the mold assembly to form a tubular green body and rough cutting the green body to bearing length. In addition, the method includes heat-treating the bearing and performing a polymer infiltration and pyrolysis treatment. The method further includes conducting dimensional stability treatment processes on the bearing and final grinding and machining to meet pre-determined specifications.

A method for forming a ceramic matrix composite bearing includes preparing a layup slurry from a mixture of water, pre-ceramic polymer and refractory filler. The method further includes forming a concentric stack of slurry-impregnated fabric sleeve layers over a rod-shaped inner mold and applying an outer mold to form a mold assembly. The method also includes heating the mold assembly to form a tubular green body and rough cutting the green body to bearing length. In addition, the method includes heat-treating the bearing and performing a polymer infiltration and pyrolysis treatment. The method further includes conducting dimensional stability treatment processes on the bearing and final grinding and machining to meet pre-determined specifications.

A method for casting a preform part for reaction bonding, the method comprising coating an inner surface of a mold and a mandrel surface with release layers. An assembled mold is formed from the mold and the mandrel and a preform cake is formed by pouring a slurry into a mold cavity and letting it settle. Thermally removing the release layers aids in removing the mandrel and removing the preform cake after pyrolyzing.

A method for casting a preform part for reaction bonding, the method comprising coating an inner surface of a mold and a mandrel surface with release layers. An assembled mold is formed from the mold and the mandrel and a preform cake is formed by pouring a slurry into a mold cavity and letting it settle. Thermally removing the release layers aids in removing the mandrel and removing the preform cake after pyrolyzing.