Plastic foam container for the densification of powder material

Powder metallurgy processes – Forming articles by uniting randomly associated metal particles – Consolidation of powders

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Details

419 42, 419 49, 264570, 100211, B22F 100

Patent

active

047241233

ABSTRACT:
A quantity of powder material (14) which is less dense than a predetermined density is disposed in a sealed container (12) which is encapsulated in a pressure transmitting medium (16). The pressure transmitting medium (16) is placed within a pot die (26) of a press where it is restrained as ram (24) enters the pot die (26) and applies a force to the pressure transmitting medium (16) and the container (12). The pressure transmitting medium (16) comprises liquid and is capable of transmitting pressure omnidirectionally about the container (12). The container (12) has a porous structure. The container (12) collapses and permanently deforms as the powder (14) compacts. The container does not completely expand to its initial shape after being removed from the pressure transmitting medium (16) and therefore saves the compacted powder (14') from resilient forces of the container (12) tending to rebound the container (12) to its initial shape.

REFERENCES:
patent: Re32117 (1986-04-01), Weaver
patent: 4381931 (1983-05-01), Hunold et al.

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