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Pressing
 In the pressing, or compaction, phase of the powder metallurgy manufacturing process, a controlled amount of mixed powder is automatically gravity-fed into a precision die and is compacted, usually at room temperature, in presses ranging from 20 to 750 tons, depending on the size, configuration, and density requirements of the part. Compacting produces what is generally referred to as a "green compact" which has the size and shape of the finished part when ejected from the die, and sufficient strength for in-process handling and transport to the sintering furnace.
Conventional compaction is performed in hard tooling in a cycle consisting of these four events: - Die Fill
- Die Closure
- Press Position
- Part Ejection
Compaction cycles are classified as single, double, or multiple action. Conventional press production rates can vary from a few hundred to over 2,000 pieces per hour, and are dependent on material filling properties, component size and geometry, and machine type. Compaction is just one of the subjects that are covered in MPP's highly acclaimed Powder Metallurgy Design Seminars. For more information on how you can attend a free Design Seminar, click here.
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