Turnarea sub presiune, denumită turnare sub presiune, este o metodă de turnare care toarnă lichid de aliaj topit într-o cameră de presiune, umple cavitatea unei matrițe de oțel la o viteză mare și solidifică lichidul de aliaj sub presiune pentru a forma o turnare. Principalele caracteristici ale turnării sub presiune care o deosebesc de alte metode de turnare sunt presiunea ridicată și viteza mare.
①The molten metal fills the cavity under pressure, and crystallizes and solidifies under higher pressure. The common pressure is 15-100MPa.
②The molten metal fills the cavity at a high speed, usually at 10-50 m/s, and some can exceed 80 m/s (the linear speed of the cavity introduced through the inner gate—the speed of the inner gate), so the molten metal is The filling time is very short, and the cavity can be filled in about 0.01-0.2 seconds (depending on the size of the casting).
Die casting is a precision casting method. The dimensional tolerances of die castings cast by die casting are very small and the surface accuracy is very high. In most cases, die castings can be assembled and applied without turning. Parts can also be cast directly. Small parts such as general camera parts, typewriter parts, electronic computing devices and ornaments, as well as complex parts of vehicles such as automobiles, locomotives, and airplanes, are mostly manufactured by die casting.
