Cold Isostatic Pressing

Cold isostatic pressing (CIP) is a compaction method used to seal powders in elastomeric molds. Place the mold in the pressure chamber, pump the liquid medium, and apply high pressure evenly from all sides. CIP applications CIP is used in powder metallurgy, cemented carbide, refractory materials, graphite, ceramics, plastics and other materials.

Benefits of the CIP process:

High density and uniform density provide predictable shrinkage during the subsequent sintering process.

The ability to handle large, complex and near-final shapes saves time and cost in post-processing.

Able to produce large aspect ratio parts with uniform density (> 2: 1).

Green strength can be processed and processed, and reduce production costs

CIP molding methods are divided into two types: wet bag process and dry bag process.

Wet bag technology:

In the wet bag method, the powder material is contained in a flexible mold bag, which is immersed in a high-pressure liquid in a pressure vessel. This process is suitable for multi-shape and small batch production, as well as the suppression of large-size products.

Dry bag technology:

The difference between dry bag pressing and wet bag pressing is that a flexible film is built into the pressure vessel and is used in all pressing cycles. The membrane isolates the pressure fluid from the mold, which becomes a "dry bag." This process is cleaner because the flexible mold is not contaminated with wet powder. Moreover, less container cleaning is required. This method has the characteristics of rapid circulation, which is very suitable for automatic mass production of powder products.

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