A system for injecting semisolid metal into a mold, the system including a mold having a mold chamber, at least one press device having a cylinder, an injection chamber, and a thrust piston, a positioning device supporting a blending device having an active portion and a cover, and an actuating device that selectively injects the semisolid metal into the mold.

An injection assembly, for pressure die casting systems, has an injection cylinder adapted to inject liquid metal into a casting cavity; the injection cylinder is actuated by a hydraulic flow of an oil-pressure controlled circuit; the oil-pressure controlled circuit includes a hydraulic cushion which blocks and releases the flow of the hydraulic fluid in the injection cylinder and provides a counter-pressure of preset value to control the injection speeds and to prevent cavitation in the injection cylinder.

An injection assembly, for pressure die casting systems, has an injection cylinder adapted to inject liquid metal into a casting cavity; the injection cylinder is actuated by a hydraulic flow of an oil-pressure controlled circuit; the oil-pressure controlled circuit includes a hydraulic cushion which blocks and releases the flow of the hydraulic fluid in the injection cylinder and provides a counter-pressure of preset value to control the injection speeds and to prevent cavitation in the injection cylinder.

Provided are a die casting method and a die casting apparatus for preventing molten metal from being unexpectedly supplied into a sleeve under decompression. Molten metal supply control for pumping up molten metal with an electromagnetic pump and supplying the molten metal into a sleeve in a state of decompressing a cavity of a die and the inside of the sleeve attached to the die, including: moving the surface of the molten metal, with the electromagnetic pump, from a standard position to the side opposite to a supply direction of the molten metal; decompressing the cavity and the inside of the sleeve; and weakening force of the electromagnetic pump, which pumps down the molten metal to the side opposite to the supply direction to supply the molten metal into the sleeve.

Provided are a die casting method and a die casting apparatus for preventing molten metal from being unexpectedly supplied into a sleeve under decompression. Molten metal supply control for pumping up molten metal with an electromagnetic pump and supplying the molten metal into a sleeve in a state of decompressing a cavity of a die and the inside of the sleeve attached to the die, including: moving the surface of the molten metal, with the electromagnetic pump, from a standard position to the side opposite to a supply direction of the molten metal; decompressing the cavity and the inside of the sleeve; and weakening force of the electromagnetic pump, which pumps down the molten metal to the side opposite to the supply direction to supply the molten metal into the sleeve.

An injection assembly (2) of a hydraulic machine for diecasting is provided with a main shut-off valve (50) suitable to prevent the return of fluid from the main pressure chamber (30). The main valve (50) comprise a containment case (541), in which a return spring (540) is housed, suitable to retain any rupture fragments thereof.

An injection assembly (2) of a hydraulic machine for diecasting is provided with a main shut-off valve (50) suitable to prevent the return of fluid from the main pressure chamber (30). The main valve (50) comprise a containment case (541), in which a return spring (540) is housed, suitable to retain any rupture fragments thereof.

The checking methods includes the steps of feeding molten metal into the mold (3), extracting from the mold after a predetermined cooling time the mechanical piece (2) formed by the solidified molten metal; and acquiring at least one real thermographic image (A, X) of an internal surface (7) of the mold (3). To check the quality of the manufactured mechanical piece, at least part of the real thermographic image and/or related parameters is/are compared with images and/or related parameters belonging to a predetermined acceptability range. A possible anomaly in the mechanical piece is detected if the real thermographic image and/or related parameters do not correspond to said images and/or related parameters belonging to the predetermined acceptability range. A differential thermographic image (C, Z) whose points have values equal to the differences between the values of the points of the real thermographic image and the values of the corresponding points of a reference thermographic image (A, X, B, Y) is determined and used to check at least one part of the manufacturing process.

The checking methods includes the steps of feeding molten metal into the mold (3), extracting from the mold after a predetermined cooling time the mechanical piece (2) formed by the solidified molten metal; and acquiring at least one real thermographic image (A, X) of an internal surface (7) of the mold (3). To check the quality of the manufactured mechanical piece, at least part of the real thermographic image and/or related parameters is/are compared with images and/or related parameters belonging to a predetermined acceptability range. A possible anomaly in the mechanical piece is detected if the real thermographic image and/or related parameters do not correspond to said images and/or related parameters belonging to the predetermined acceptability range. A differential thermographic image (C, Z) whose points have values equal to the differences between the values of the points of the real thermographic image and the values of the corresponding points of a reference thermographic image (A, X, B, Y) is determined and used to check at least one part of the manufacturing process.

The present invention enables confirmation that a mold magnetically adhered by a magnetic clamping device has been magnetically adhered by a sufficient adhesion force so as not to be pulled off from the magnetic clamping device by a mold opening force of a mold handling device. A controller 7 carries out magnetization of a magnetic clamping device 10 such that a magnetic adhesion force weaker than that in normal magnetization is generated in a state where molds M1, M2 are bound together, and carries out a test to determine whether separation of the molds M1, M2 would occur when platens 2, 3 are separated. The controller issues a warning regarding lack of guaranteed adhesion force to an operator when separation is detected, and carries out normal magnetization of the magnetic clamping device 10 when separation is not detected.