The invention has for object a method for manufacturing concrete construction blocks (6) for a wind-generator tower made up of at least two consecutive blocks secured to one another by a contact surface of each of the two blocks, the manufacturing method comprising the following steps: pouring concrete into a first cage of reinforcements (10-1) so as to obtain the first concrete construction block comprising a first contact surface (9), and pouring concrete into a second cage of reinforcements (10-2) so as to obtain the second concrete construction block, the second cage of reinforcements being provided in a form (21) arranged such that the first contact surface (9) of the first block (6-1) makes up a wall for delimiting (26) the pouring of the concrete such as to form a contact surface (9) of the second block (6-2).

A method for indirect additive manufacturing of an object constructed of boron carbide, silicon carbide, and free silicon, comprising: (i) producing a porous preform constructed of boron carbide and silicon carbide by an indirect ceramic additive manufacturing (ICAM) process in which particles of a powder mixture become bonded together with an organic binder, wherein the powder mixture comprises: a) boron carbide particles, and b) silicon carbide particles, wherein at least 80 vol % of the silicon carbide particles are larger than the boron carbide particles; and wherein the boron carbide and silicon carbide particles are each included in an amount of 40-60 wt. % of the powder mixture, provided that the foregoing amounts sum to at least 95 wt. %; (ii) subjecting the porous preform to a temperature of 500-900° C. to volatilize the organic binder; and (iii) infiltrating molten silicon into pores of the porous preform to produce the object.

Provided is an intelligent 3D printing method for a large 3D deep complex engineering geological model, including the steps of firstly, determining physical and mechanical parameters of the similar materials of the intact rock mass and the rock mass structure, and selecting a cementing agent; performing a small-scale 3D printing test at different material ratios and 3D printing parameters; determining the 3D printing similar material ratios and the 3D printing parameters; establishing a 3D digital model, planning printing paths, and determining pore diameters, number and combination form of the print heads; conveying the similar materials to the print heads; under the control of a 3D printing intelligent coupling control system, running each print head according to the planned and generated printing paths to complete printing; and finally, testing a printing effect of the model.

A 3D printer with a lift mechanism is disclosed. The 3D printer is coupled to the lift mechanism which is in turn coupled to a base or the ground. The lift mechanism comprises telescopically extendable columns comprising concentric cylinders positioned within one another, so as to extend and collapse fully, thus raising and lowering the 3D printer to a specific height. The lift mechanism further comprises extendable and lockable diagonals which connect neighboring telescopic columns at their top portions in a helical fashion. The diagonals are installed for sturdiness and support as the lift is operated, as well as to position the lift at a desired height when the diagonals are locked in place. The lift mechanism may comprise 2 telescopic cylinder columns or 3 or more telescopic cylinder columns. The lift mechanism comprises at least a first stage and an intermediate stage, and optionally a last stage.

An injection molding apparatus including a ceramic powder material injection device, a mold, and a gas providing device is provided. The ceramic powder material injection device is adapted to contain a ceramic powder material. The mold has a molding concavity, wherein the ceramic powder material injection device is adapted to inject at least the ceramic powder material into the molding concavity. The gas providing device is adapted to provide a gas into the molding concavity to increase a pressure in the molding concavity to increase a density of the ceramic powder material in the molding concavity. In addition, an injection molding method is also provided.

A method for indirect additive manufacturing of an object constructed of boron carbide, silicon carbide, and free silicon, comprising: (i) producing a porous preform constructed of boron carbide and silicon carbide by an indirect ceramic additive manufacturing (ICAM) process in which particles of a powder mixture become bonded together with an organic binder, wherein the powder mixture comprises: a) boron carbide particles, and b) silicon carbide particles, wherein at least 80 vol % of the silicon carbide particles are larger than the boron carbide particles; and wherein the boron carbide and silicon carbide particles are each included in an amount of 40-60 wt. % of the powder mixture, provided that the foregoing amounts sum to at least 95 wt. %; (ii) subjecting the porous preform to a temperature of 500-900 C. to volatilize the organic binder; and (iii) infiltrating molten silicon into pores of the porous preform to produce the object.

Masonry units, such a blocks, are fabricated in a sequential process, using improved mold structures, such as within a production corridor of a corresponding fabrication system. A compressible masonry feedstock or formula, which can be de-agglomerated before use, is filled within a block mold having releasable elements. The formula is then compressed within the mold structure. The compressed workpiece can be further processed, such as for any of final height adjustment, the establishment of a surface feature, or to remove cores. The block mold, having releasable elements or sides, such as using hinges or springs, is released from the formed block, wherein the formed masonry unit can be removed for curing, and wherein the block mold can be reused to fabricate a subsequent masonry unit.

An automated mold change system, for use with a concrete products machine of a type having a products forming section and a feedbox assembly section, includes a mold exchange assembly coupled to an underside of the feedbox assembly section and vertically moveable therewith, a mold transfer assembly on an opposed side of the products forming section from the feedbox assembly section, and mounts on the products forming section configured to retain a mold assembly thereon. A mold exchange path runs axially between the mold exchange assembly and the mounts on the products forming section and intersects a mold transfer path of the mold transfer assembly at a load-unload position, wherein the mold exchange assembly is configured to lift a mold off of the mounts and onto the mold transfer assembly at the load-unload position.

In a method of manufacturing objects, extrudable ceramic forming material is extruded through multiple dies arrayed around an extrusion axis, the dies mounted to permit controlled movement of the dies during the course of extrusion to vary the position of several extrudate streams exiting the dies. Extruded objects are defined by spokes corresponding to the extrudate streams with the streams having a varying spacing from a central axis.

The invention has for object a method for manufacturing concrete construction blocks (6) for a wind-generator tower made up of at least two consecutive blocks secured to one another by a contact surface of each of the two blocks, the manufacturing method comprising the following steps: pouring concrete into a first cage of reinforcements (10-1) so as to obtain the first concrete construction block comprising a first contact surface (9), and pouring concrete into a second cage of reinforcements (10-2) so as to obtain the second concrete construction block, the second cage of reinforcements being provided in a form (21) arranged such that the first contact surface (9) of the first block (6-1) makes up a wall for delimiting (26) the pouring of the concrete such as to form a contact surface (9) of the second block (6-2).