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The Differences between Injection Molding and Die Casting

The Differences between Injection Molding and Die Casting

The Differences between Injection Molding and Die Casting



Injection Molding Die casting



Product applicationPlastic productsMetal products
ProcessInjecting a heated and melted material into a mold cavity under high pressure and cooling and solidifying to obtain a molded product


A molten alloy liquid is poured into a pressure chamber, a cavity of a steel mold is filled at high speed, and the alloy liquid is solidified under pressure to form a casting.



Temperature  controlThe barrel temperature ,nozzle temperature and mold temperature need to control.The mold cavity temperature exceeds


700 degrees
Pressure control①The plasticizing pressure depends on the type of plastic used.Metal liquid fills cavity under pressure, the common pressure is 15-100MPa.

②The injection pressure is based on the pressure applied to the plastic by the top of the plunger or screw (converted from the oil pressure)
Molding cycle①The filling time is about 3-5 seconds.①The metal liquid fills the cavity  usually at 10-50 m / s, and some can exceed 80 m / s.

②The dwell time is about 20-120 seconds ( special thick parts can be up to 5-10 minutes )② The cavity can be filled in about 0.01-0.2 seconds (depending on the size of the casting).
Feature①Production is fast due to the flexibility in the molding process①Efficient process with a high degree of accuracy

②Plastic Injection molds can accommodate different plastic or polymer materials②No need secondary processing

③Fillers can be used in plastic molds to increase strength③Complicated designs can be easily made

④Efficient process with very accurate finishes③Produces higher-quality products with better tolerance that will last longer

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