Die-casting is a process in which metal objects are formed by injecting
molten metal under pressure into dies, or molds.
The difference between the two major zinc die casting techniques
is in the introduction of the molten metal: the metal is ladled into a chamber
in the cold-chamber process and with the help of a plunger the metal is poured
into the cold die cavity, in which it quickly hardens.
In the piston or gooseneck, in the molten metal, the plunger and its
cylinder are submerged, in the top of the cylinder when the plunger is
retracted the metal is being passed through a hole. In the die cavity when the
metal enters the die core is in position and fills the space around it; the die core is retracted as soon as the metal hardens.
By a lot of factors quality of high-pressure zinc die casting
products are influenced. Among them, the melt-, and die temperatures
are the most important ones. A data acquisition system is showed by this paper,
developed for measuring the melt and dies temperatures and under variable
conditions the results of the temperature measurements obtained.
For high production rates, the high-pressure die-casting (HPDC) is
particularly suitable and it is applied in several industrial fields; and by
this technology, about half of the world's production of light metal castings
is obtained. From the end-users specific attention is paid to the quality
requirements as well as to the achievable production rate, process control, and
monitoring. The zinc dies casting manufacturer is very
reliable.
For the HPDC industry, this overview leads to individuate the most
relevant challenges: understanding the role of the process variables,
zero-defect production, the introduction of R&D activities, real-time process
control, process optimization, disseminating the knowledge about HPDC technology. Performing these actions, HPDC foundries are quite efficient to
achieve a more mature and efficient approach to large end-users and to exploit
their relevant potential.
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