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A die casting machine is a series of industrial casting machines that hydraulically inject molten metal into a mold to cool and form under pressure, and obtain solid metal castings after the mold is opened.
Stage 1: Slow injection movement - When the injection starts, the hydraulic oil of the system enters the cavity through the oil circuit integrated plate, and then enters the cavity through the channel, thereby pushing the injection piston to the left to realize slow injection.
Stage 2: Rapid injection movement - when the injection punch exceeds the feeding port of the barrel, the accumulator control valve is opened, the hydraulic oil enters the cavity quickly through the port, the hydraulic oil volume of the cavity increases rapidly, and so does the injection speed.
Stage 3: Pressurization movement - the metal liquid is filled into the cavity, when it is about to end, the alloy liquid begins to solidify, and the resistance of the punch increases at this time. It is controlled by the computer program and the accumulator is used to control the valve to open cavity, thereby pushing the booster piston and piston rod to move quickly to the left.
When the piston rod is engaged with the inner and outer conical surfaces of the floating piston, it is cut off to form a closed cavity, and the boosting effect of the booster piston, the piston rod, the floating piston and the pressure of the cavity together make the piston obtain a booster effect.
Die-casting machines can be basically divided into two categories due to the difference of die-casting alloys, namely cold-chamber machines and hot-chamber machines.
The cold chamber die casting machine is divided into two types: horizontal and vertical according to the structure and arrangement of the press chamber. The clamping mechanism of the hot chamber die casting machine and the cold chamber die casting machine is the same, and the difference lies in the different injection and pouring mechanisms. The pressure chamber of the hot chamber die casting machine is closely connected with the furnace, while the pressure chamber of the cold chamber die casting machine is separate from the furnace.
The cold chamber machine is suitable for the die casting of high temperature alloys such as copper, magnesium and aluminum, while the hot chamber machine is used for the die casting of low temperature alloys such as zinc, tin and lead.
The pressure chamber of the hot-chamber die-casting machine is connected with the cyanide, and it is named after the pressure chamber invades into the liquid metal. Its injection mechanism is arranged above the thermal insulation cochlea.
Features of hot chamber die casting machine:
Cold chamber die casting machine refers to a type of die casting machine in which the injection chamber and the injection punch are not immersed in the molten metal, but a quantitative amount of molten metal is poured into the injection chamber and then injected. For aluminium, it also called aluminium pressure die casting machine.
Features of vertical cold chamber die casting machine:
Features of horizontal cold chamber die casting machine:
The above is all about the classifications of die casting machine and their characteristics, for more information, you want to know about die casting parts, welcome to contact us at any time.