The invention provides a double station vacuum die casting machine, comprising a driving device, a first die casting unit, a second die casting unit, a feeding component, a vacuum pump and a housing, the vacuum pump is arranged outside the housing, the driving device is arranged inside the housing, and the first die casting unit and the second die casting unit are respectively arranged on both sides of the driving device; the driving device comprises a driving unit, a first injection rod assembly and a second injection rod assembly, the first injection rod assembly and the second injection rod assembly are respectively arranged on both sides of the driving unit, the first injection rod assembly is used to provide power for die casting of the first die casting unit, and the second injection rod assembly is used to provide power for the second die casting unit.

The invention provides a double station vacuum die casting machine, comprising a driving device, a first die casting unit, a second die casting unit, a feeding component, a vacuum pump and a housing, the vacuum pump is arranged outside the housing, the driving device is arranged inside the housing, and the first die casting unit and the second die casting unit are respectively arranged on both sides of the driving device; the driving device comprises a driving unit, a first injection rod assembly and a second injection rod assembly, the first injection rod assembly and the second injection rod assembly are respectively arranged on both sides of the driving unit, the first injection rod assembly is used to provide power for die casting of the first die casting unit, and the second injection rod assembly is used to provide power for the second die casting unit.

A die casting method includes a step of supplying molten metal to a plunger sleeve, and a step of advancing a plunger in the plunger sleeve, to inject the molten metal into dies. In the step of injecting the molten metal into the dies, the plunger is once retracted before being advanced, and the plunger is kept accelerated until the plunger reaches a target maximum speed when the plunger retracted is advanced.

A die casting method includes a step of supplying molten metal to a plunger sleeve, and a step of advancing a plunger in the plunger sleeve, to inject the molten metal into dies. In the step of injecting the molten metal into the dies, the plunger is once retracted before being advanced, and the plunger is kept accelerated until the plunger reaches a target maximum speed when the plunger retracted is advanced.

A casting unit for a die casting machine has a casting container with a casting chamber, a casting piston, which is arranged in an axially movable manner in the casting chamber, a melt bath connection opening, a melt inlet channel from the melt bath connection opening to the casting chamber, a melt outlet channel, which leads out of the casting chamber separately from the melt inlet channel, and a shut-off control valve for the melt inlet channel. The shut-off control valve has a valve main body arranged on the casting container, a valve seat and a valve closing body. The valve main body is held on the casting container at a lateral valve assembly region of the casting container in a manner accessible from the outside and includes the melt bath connection opening, and/or the casting piston is of a spool type, and the shut-off control valve is located with its valve closing body in the melt inlet channel at a flow-technical distance from the melt bath connection opening on the one hand and from the casting chamber on the other hand.

A casting unit for a die casting machine has a casting container with a casting chamber, a casting piston, which is arranged in an axially movable manner in the casting chamber, a melt bath connection opening, a melt inlet channel from the melt bath connection opening to the casting chamber, a melt outlet channel, which leads out of the casting chamber separately from the melt inlet channel, and a shut-off control valve for the melt inlet channel. The shut-off control valve has a valve main body arranged on the casting container, a valve seat and a valve closing body. The valve main body is held on the casting container at a lateral valve assembly region of the casting container in a manner accessible from the outside and includes the melt bath connection opening, and/or the casting piston is of a spool type, and the shut-off control valve is located with its valve closing body in the melt inlet channel at a flow-technical distance from the melt bath connection opening on the one hand and from the casting chamber on the other hand.

A casting plunger system for a die casting machine includes a stationary system part and a system part which moves relative to the stationary system part in a respective casting cycle for the introduction of melt material into a casting mould. The moved system part has a plunger, a plunger rod and a rod drive unit, and is configured to decelerate at the end of a mould filling phase of the casting cycle under the effect of pressure on the melt material. A casting method for a die casting machine is provided with such a plunger system. The moved system part has a mass which can be adjusted variably between different casting cycles, and/or the moved system part consists of a moved main system part and an additional mass unit which is arranged so as to be movable relative to the main system part and is configured to decelerate, at the end of the mould fill phase of the casting cycle, later by a predefined delay time than the main system part.

A casting plunger system for a die casting machine includes a stationary system part and a system part which moves relative to the stationary system part in a respective casting cycle for the introduction of melt material into a casting mould. The moved system part has a plunger, a plunger rod and a rod drive unit, and is configured to decelerate at the end of a mould filling phase of the casting cycle under the effect of pressure on the melt material. A casting method for a die casting machine is provided with such a plunger system. The moved system part has a mass which can be adjusted variably between different casting cycles, and/or the moved system part consists of a moved main system part and an additional mass unit which is arranged so as to be movable relative to the main system part and is configured to decelerate, at the end of the mould fill phase of the casting cycle, later by a predefined delay time than the main system part.

A lead delivery apparatus for a cast on strap machine is arranged to deliver a predetermined volume of molten lead to a mould. The apparatus includes a first needle valve, a second needle valve, and a housing. The housing has a reservoir including an inlet and an outlet. The reservoir inlet is in fluid communication with a molten lead supply. The reservoir is supplied with molten lead during use such that the molten lead in the reservoir is maintained at a constant height.

A lead delivery apparatus for a cast on strap machine is arranged to deliver a predetermined volume of molten lead to a mould. The apparatus includes a first needle valve, a second needle valve, and a housing. The housing has a reservoir including an inlet and an outlet. The reservoir inlet is in fluid communication with a molten lead supply. The reservoir is supplied with molten lead during use such that the molten lead in the reservoir is maintained at a constant height.