The Difference Between CIP and Metal Molding
In principle, they have different pressurization processes. CIP applies isostatic pressure to materials using liquid pressure, while metal molding is only applicable to uniaxial pressure. As a result, CIP can produce density and even products because there is no friction with the metal mold.
CIP processing type
According to the relationship between powder filled mold and pressure medium, CIP forming methods are divided into wet bag method and dry bag method.
Wet bag method
In the wet bag process, the powder is filled in the forming mould and sealed outside the high-pressure vessel before being directly immersed in the pressure medium. Then, isostatic pressure is applied on the surface of the die to compress the powder. This method is suitable for small batch production and trial production of various complex shapes or large products.
There are two types of structure: One pressurizes the pressure medium into the pressure vessel from the outside; Another pressurizes the pressure medium sealed in the pressure vessel directly, and installs the piston instead of the top cover.
Dry bag method
The dry bag method is to transfer the pressure through the pressed rubber mold in the high-pressure vessel and fill the powder in the formed isostatic pressing mold.
The circumferential pressurization system only applies pressure from the outer surface of the molded rubber mold through the cylindrical rubber pressing mold. However, due to the fluid properties of the powder, the pressure applied to the green compacts is almost equal to isostatic pressure.
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