Abstract: A magnesium reclamation process whereby magnesium and magnesium alloy fines, chips and scraps may be recovered and remelted for reuse. The method is comprised of the steps of pelletizing the magnesium by first compacting the magnesium with a low pressure press so as to initially expel the majority of the air, followed by a high pressure press under a controlled environment to form a compact pellet. The pellets are then melted either by stacking on the cold heel of a pot and heating under a controlled environment or pre-heating in a basket over a melt, and then subsequently immersing the load. Melting can also be accomplished by controlled melting, utilizing an induction melting furnace whereas temperature can be slowly increased. Pelletizing pressures range from approximately the yield pressure to the cold welding pressure of the material being reclaimed. A typical pelletizing environment is 20% SF.sub.6 and 80% CO.sub.2 and a suitable melting environment is 98% CO.sub.2 and 2% SF.sub.6.

Abstract: A press apparatus for compacting powder material into generally spherical articles by way of a tooling arrangement comprising a die having a bore, a punch having an upper face defining a generally hemispherical cavity reciprocably movable along the axis of the die bore and a counterpunch positionable over the opening of the die bore. The lower face of the counterpunch defines a generally hemispherical cavity of the same diameter as the generally hemispherical cavity defined by the face of the punch. The generally hemispherical cavities are in alignment with each other and define a spherical mold cavity. During the compacting step, the counterpunch is positioned with its lower face abutting the upper surface of the die plate and compaction of the powder material is achieved entirely by movement of the punch in an upward direction.

Abstract: A hydraulic press for the shaping and pressing of hollow ceramic articles, comprising a bedplate fitted with a horizontal table, on which top a die is fitted, wherein the negative outer shape of the article to be shaped and pressed is reproduced in at least one cavity thereof, being a special pressing member, consisting of a bowl made of an elastically flexible and extensible material, and having at least partly, the negative inner shape of the article to be shaped and pressed, fitted within said cavity, coaxially thereto, and being the possibility given to have said bowl uniformly inflated by introducing a pressure fluid therein; means being also provided to have said die temporarily closed while the ceramic powder or paste, previously introduced therein, is pressed, and to have the duly shaped and pressed ceramic article ejected therefrom.

Abstract: An apparatus for compressing powder material into at least partially spherical articles, comprising a die and upper and lower reciprocally movable punches. The die has a center bore through which the lower punch is reciprocable. The wall at the upper part of the die bore is enlarged to form a spherical zone portion of a hemispherical cavity. The end face of the lower punch has a concave shape to form a segment of the hemispherical cavity when the face of the lower punch is flush with the die cavity wall. The lower face of the upper punch defines a hemispherical cavity which mates with the hemispherical cavity of the die. In operation, the bore and die cavity are charged with powder material and the upper punch is brought into engagement with the die. A compaction stroke by the lower punch then forces the powder material into the spherical cavity. The upper punch is then withdrawn and the compacted spherical article is removed from the die.

Abstract: An improved hydraulic press, comprising a base frame with an horizontal bed, to which two stationary heads, termed "fore head" and "rear head", respectively, are firmly secured, said heads being connected with one another by at least two cylindrical, parallel columns, whereon a movable positioning and pre-compression crosshead, operated by hydraulic jacks, is slidingly fitted, whereby to act on a movable punch, located opposite to a stationary die, acting both punch and die, on the recess of a bottom mold; being the pressure on the movable punch, working on the recess of the bottom mold, being exerted through a pad made of an elastically flexible material, interposed between said crosshead and said fore head, it being possible to have said pad filled with a pressurized liquid.

Abstract: In a molding machine of the type wherein a movable die plate carrying a movable mold is moved toward a stationary mold, the movable die plate is locked by a locking member to the tie bars, and then the mold tightening cylinder is operated to strongly urge the movable mold against the stationary mold, the locking member is operated by an electric actuator before the movable mold engages the stationary mold, or while the movable die plate is still being moved toward the stationary mold.

Abstract: A mixture of fibrous material and a thermosetting binder is pressed in unheated state at a working station to convert it into a semi-finished body having approximately the shape and size of the desired shaped article, and thereupon the semi-finished body is pressed at the same working station but under application of heat, in order to convert it into the desired shaped article while setting the thermosetting binder.