A vacuum smelting device with mold-temperature control design includes: a chamber body and a cabin door, wherein the chamber body and the cabin door form a vacuum closed space; a smelting crucible disposed in the vacuum closed space for smelting raw materials to a molten metal; a casting mold also disposed in the vacuum closed space for accommodating the molten metal poured from the smelting crucible, and solidifying the molten metal to an as-cast alloy; and a mold-temperature control module surrounding the casting mold for controlling the temperature of the casting mold.

An apparatus for manufacturing items of light alloy or similar comprises a mould (10) that includes two half-moulds (12, 14), lower and upper, able to be coupled together. The lower half-mould (12) defines a moulding cavity (20) adjacent to a supply duct (16) of liquid metal that passes through it up to an introduction passage (18) of the liquid metal in the moulding cavity (20). The upper half-mould (14) is associated with at least one moveable punch (24) provided with a moulding surface (21) that defines the shape of an item to be moulded together with the moulding cavity (20). Each punch (24) performs the function of a shutter to stop the flow of liquid metal towards the moulding cavity (20). The apparatus includes temperature control means and temperature sensors connected with a control unit (32) that prevents the movement of the moveable punches (24) if the temperature of both half-moulds (12, 14) is not comprised within a predetermined range of values.

An apparatus for manufacturing items of light alloy or similar comprises a mould (10) that includes two half-moulds (12, 14), lower and upper, able to be coupled together. The lower half-mould (12) defines a moulding cavity (20) adjacent to a supply duct (16) of liquid metal that passes through it up to an introduction passage (18) of the liquid metal in the moulding cavity (20). The upper half-mould (14) is associated with at least one moveable punch (24) provided with a moulding surface (21) that defines the shape of an item to be moulded together with the moulding cavity (20). Each punch (24) performs the function of a shutter to stop the flow of liquid metal towards the moulding cavity (20). The apparatus includes temperature control means and temperature sensors connected with a control unit (32) that prevents the movement of the moveable punches (24) if the temperature of both half-moulds (12, 14) is not comprised within a predetermined range of values.

A multi-position parallel pressurized casting device for large aluminum alloy castings and method thereof are provided. The device includes a platform, a top surface of the platform is a working surface, and a bottom of the platform is provided with a holding furnace. A number of the holding furnace is two or more, and each holding furnace is connected to a liquid filling port corresponding to the working surface by a separate lift device, and the holding furnaces can achieve independent liquid level pressure control or synchronization liquid level pressure control in any combination by a lift control system; and a cover body is also provided on the working surface, the cover body and the working surface form a sealed working chamber. A vacuum-pumping system and an inert gas replacement system for the working chamber and/or the holding furnace are further provided.

A multi-position parallel pressurized casting device for large aluminum alloy castings and method thereof are provided. The device includes a platform, a top surface of the platform is a working surface, and a bottom of the platform is provided with a holding furnace. A number of the holding furnace is two or more, and each holding furnace is connected to a liquid filling port corresponding to the working surface by a separate lift device, and the holding furnaces can achieve independent liquid level pressure control or synchronization liquid level pressure control in any combination by a lift control system; and a cover body is also provided on the working surface, the cover body and the working surface form a sealed working chamber. A vacuum-pumping system and an inert gas replacement system for the working chamber and/or the holding furnace are further provided.

A gas pressure control apparatus that can control a pressure applied to a surface of molten metal with high accuracy. A gas pressure control apparatus includes a gas generation unit configured to generate nitrogen gas, and a pressure control unit configured to adjust a pressure of the nitrogen gas generated by the gas generation unit and to supply the nitrogen gas to a low-pressure casting apparatus. The pressure control unit includes a servo valve configured to control a flow rate of the nitrogen gas supplied from a tank and to cause the nitrogen gas to flow toward the low-pressure casting apparatus, and a pressure controller configured to adjust an opening degree of the servo valve based on a measured pressure Pm of the nitrogen gas supplied to the low-pressure casting apparatus.

The invention relates to the field of aluminum wheel casting molds, and more particularly relates to a closed-loop control method and system for a mold temperature in a wheel casting process. The control method includes: step 1, acquiring data, that is, acquiring a plurality of mold position temperatures, and cooling pipeline opening and closing signals in a target wheel casting process according to a fixed frequency; step 2, storing, based on acquired mold opening and closing signals of casting equipment, the acquired data in a database in the form of a unique ID according to a single wheel casting process; step 3, calculating new process parameters based on the acquired plurality of position temperatures and time; and step 4, integrating the calculated process parameters, and issuing the process parameters to a PLC of a casting equipment to perform new casting. According to the invention, the temperature control parameters are calculated based on the acquired temperature data and time process to form the temperature control process of the casting process, which solves the technical problem of significant fluctuations in the quality of the low-pressure casting process of aluminum wheels and improves casting stability and yield.

The invention relates to the field of aluminum wheel casting molds, and more particularly relates to a closed-loop control method and system for a mold temperature in a wheel casting process. The control method includes: step 1, acquiring data, that is, acquiring a plurality of mold position temperatures, and cooling pipeline opening and closing signals in a target wheel casting process according to a fixed frequency; step 2, storing, based on acquired mold opening and closing signals of casting equipment, the acquired data in a database in the form of a unique ID according to a single wheel casting process; step 3, calculating new process parameters based on the acquired plurality of position temperatures and time; and step 4, integrating the calculated process parameters, and issuing the process parameters to a PLC of a casting equipment to perform new casting. According to the invention, the temperature control parameters are calculated based on the acquired temperature data and time process to form the temperature control process of the casting process, which solves the technical problem of significant fluctuations in the quality of the low-pressure casting process of aluminum wheels and improves casting stability and yield.

Molten metal M is raised to the vicinity of a gate 11 of a cavity 9C by increasing the pressure in a holding furnace 5 with gas, and thereafter the cavity 9C is filled with the molten metal M by decreasing the pressure in the cavity 9C by suction and further increasing the pressure in the holding furnace 5. Thereafter, the decompression of the cavity 9C is stopped after a preset filling time, and the compression of the holding furnace 5 is stopped when solidification of the molten metal M is completed. In this way, the suction is minimized, and it becomes possible to employ a simple decompression part 14. A reduction in equipment cost and production cost is thereby achieved, and a reduction in casting cycle time is also achieved.

Molten metal M is raised to the vicinity of a gate 11 of a cavity 9C by increasing the pressure in a holding furnace 5 with gas, and thereafter the cavity 9C is filled with the molten metal M by decreasing the pressure in the cavity 9C by suction and further increasing the pressure in the holding furnace 5. Thereafter, the decompression of the cavity 9C is stopped after a preset filling time, and the compression of the holding furnace 5 is stopped when solidification of the molten metal M is completed. In this way, the suction is minimized, and it becomes possible to employ a simple decompression part 14. A reduction in equipment cost and production cost is thereby achieved, and a reduction in casting cycle time is also achieved.