A production process includes introducing the material to be moulded into a mould, placing the mould in an envelope comprising a vacuum port; creating a low pressure in the envelope by formation of a gas flow through the vacuum port; deforming the mould; stopping the gas flow; and applying pressure on at least a portion of the mould, optionally with interposition of the envelope, at least after the gas flow is stopped.

Manufacturing process of a stone providing for the following steps: positioning a die and a base platform under punches of a press, filling cavities of the die with a sand layer, placing a tube on the sand, actuating the actuation means to actuate the punches from the idle position to the operating position so that each punch presses the tube in the sand and presses the sand in the cavities of the die, actuating the actuation means to raise the punches, placing the stones in a drying station, extracting the solidified sand inside the tube from each stone, and placing a lighting device in the tube.

A concentric-ring single-sided dovetail groove ceramic tile back mold core is disclosed. A vulcanized rubber of back mold core surface comprises raised patterns and recessed patterns integrally formed, pasted and covered on a back mold core iron substrate. The raised patterns are equidistantly offset outwards layer by layer with a central position of the back mold core as a center; and a side of each raised pattern close to the center is of an equiangular obtuse angle, and a side of each raised pattern far away from the center is of an acute angle with an angular equal difference gradually decreasing.

The present disclosure relates to a method for molding a part with a selected compaction. The method may involve providing a die having a main body portion and a movable punch movable along a uniaxial axis of movement. An interior area of the main body portion of the die is at least partially filled with a compressible intermediary material, wherein the compressible intermediary material forms a powder. A part is placed in the main body portion of the die such that the part is at least partially encapsulated within the compressible intermediary material. The movable punch is then used to apply a uniaxial force to the part and the compressible intermediary material, wherein the intermediary material assists in providing a desired degree of compaction to the part.