An apparatus for low-pressure casting of metallic products includes at least one forming die which is provided with a cavity which is adapted to receive a molten metallic mass. The forming die includes at least two parts which can move between an open configuration, in which they are mutually spaced apart, and a closed configuration, in which together they define the cavity, the forming die being supported and moved by a manipulator with multiple degrees of freedom, which has movable parts that are actuated by electric motor components driven by a control unit.

Provided is a casting mold including a lower mold 4 fixed on a base 3, a plurality of horizontal sliding molds 5 to 8 which slide freely on the base 3 between a mold-opening position and a mold-closing position, an upper mold 9, and sliding mechanisms 12, 25 which slide the horizontal sliding molds 5 to 8 in the sliding directions. When sliding the horizontal sliding molds from the mold-opening position to the mold-closing position, the sliding mechanisms 12, 25 cause force to act on a lower section of the horizontal sliding molds 5 to 8 and prevent force from acting on an upper section of the horizontal sliding molds 5 to 8.

A casting apparatus of a casting equipment includes an upper frame to which an upper mold is attached, a lower frame to which a lower mold is attached, a mold closing mechanism, a pair of main link members each of which has a central portion provided with a rotating shaft, a pair of auxiliary link members each of which has a central portion provided with a rotating shaft, and a drive means. The upper frame, the lower frame, the main link member, and the auxiliary link member constitute a parallel link mechanism.

Piston has crown portion 2 having crown surface 2a defining combustion chamber, thrust-side and anti-thrust-side skirt portions 3a, 3b formed integrally with crown portion and sliding on cylinder wall surface, a pair of apron portions 4a, 4a joined to skirt portions in circumferential direction, recessed portion 6 formed on back surface that is opposite side to crown surface and extending between skirt portions along substantially longitudinal direction, and a plurality of protrusions 7 formed integrally with bottom surface of recessed portion and extending along arrangement direction of skirt portions. At least one end edge in longitudinal direction of protrusion is integrally connected to inner side surface, facing one end edge of protrusion, of recessed portion. Adequate transcription performance to molding surface can therefore be ensured while removing remains of air on bottom side of recessed portion of mold for molding protrusions on crown portion back surface during casting.

The present invention provides a mold casting device including a raising and lowering mechanism that raises and lowers the upper mold; a die plate that is fixed to the upper mold; and a base member that is provided on upper end portions of the raising and lowering mechanism and supports the die plate from below.

An assembly includes a first mold component defining a first portion of a mold cavity and a first slot. The first slot corresponds to a first portion of a retention channel. The assembly also includes a second mold component defining a second portion of the mold cavity and a second slot. The second slot corresponds to a second portion of the retention channel. The assembly also includes a connector having a cross-sectional shape corresponding to a cross-sectional shape of the retention channel. The connector has thermal expansion characteristics that are different from thermal expansion characteristics of the first and second mold components such that when the first and second mold components are in contact and the connector is inserted into the retention channel, heating the assembly causes differential thermal expansion of the connector and the mold components resulting in a clamping force between the mold components.

A casting apparatus according to the present disclosure includes an upper frame, a lower frame, a main link member, a sub-link member and a lifting/lowering mechanism. The upper mold is attached to the upper frame. The lower frame is disposed in parallel with the upper frame. The lower mold is attached to the lower frame. A top end part of the main link member is rotatably connected to the upper frame and a bottom end part thereof is rotatably connected to the lower frame. The sub-link member is disposed in parallel with the main link member, the top end part thereof is rotatably connected to the upper frame and the bottom end part thereof is rotatably connected to the lower frame. The lifting/lowering mechanism causes the sub-link member to lift or lower with respect to the main link member.

A casting apparatus according to the present disclosure includes an upper frame, a lower frame, a main link member, a sub-link member and a lifting/lowering mechanism. The upper mold is attached to the upper frame. The lower frame is disposed in parallel with the upper frame. The lower mold is attached to the lower frame. A top end part of the main link member is rotatably connected to the upper frame and a bottom end part thereof is rotatably connected to the lower frame. The sub-link member is disposed in parallel with the main link member, the top end part thereof is rotatably connected to the upper frame and the bottom end part thereof is rotatably connected to the lower frame. The lifting/lowering mechanism causes the sub-link member to lift or lower with respect to the main link member.

A casting apparatus includes an upper frame to which an upper mold is attached, a lower frame to which a lower mold is attached, a first hydraulic actuator, a hydraulic unit, a first main link member, a first sub-link member and a rotation actuator, and the upper frame, the lower frame, the first main link member and the first sub-link member constitute a first parallel link mechanism. The hydraulic unit causes the electric motor to operate at a predetermined number of revolutions when performing mold opening or mold closing and causes the electric motor to operate at a limit number of revolutions smaller than the predetermined number of revolutions when not performing mold opening or mold closing.

A wheel hub molding and casting die includes: a casting die shell, a supporting bottom plate, a limiting bottom plate, a lifting module, a module supporting plate, a lower die, an upper die and removable plates. The supporting bottom plate is mounted on the lower surface of the casting die shell. The limiting bottom plate is arranged below the supporting bottom plate. The module supporting plate is movably arranged in a molding cavity. The lifting module is connected between the bottom of the molding cavity and the module supporting plate. The lower die and the upper die are closed to form a pouring cavity. Annular slots are formed in the outer side wall of the upper die. Removable plate slots are formed in the upper surface of the casting die shell.