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(1) metal parts with complex shape, clear contour and thin wall deep cavity can be manufactured. The die casting has higher dimensional accuracy, the surface roughness reaches Ra0.8-3.2um, and good interchangeability.
(2) high material utilization. Due to the high precision of die casting parts, only a few mechanical processing can be used for assembly, and some die casting parts can be used for direct assembly. High production efficiency. Due to high speed filling, short filling time, rapid solidification of metal industry, rapid cycle speed of die casting operation. Easy to use inlays.
The pressure of die casting is provided by the pump, which is transferred to the injection piston through the oil, and then acted on the metal liquid in the pressure chamber through the injection punch.
Injection cylinder → Injection punch → Chamber metal → Mold cavity
This pressure is an important factor to obtain a die-cast with dense tissue and clear profile.
High injection pressure can be selected for complex casting.
Shrinkage is commonly called shrinkage. It refers to the percentage reduction in size of an alloy from liquid to solid, and from cooling to room temperature.
The size of shrinkage is related to the structural features, wall thickness, chemical composition and technological factors of the alloy.
Generally speaking, the linear shrinkage of zinc alloy is 0.6%~0.8% when free contraction and 0.3%~0.6% when blocked contraction.