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How Vacuum Conveying Addresses Concerns
Posted On 12/03/2017 23:13:59 by chinacryogenics

vacuum insulation pipeline conveying can successfully meet the needs of additive manufacturing operations using metals by providing a contained, effective, and safe method for the metal powder transfer. However, like many processes, and indeed AM machines, not all vacuum conveying systems are created equal. The simple domestic vacuum cleaner with which we are all familiar is a vacuum conveyor of sorts.

However, we all understand its limitations and, for example, we know it cannot pick up that coin or paperclip that we dropped on the family room floor. In simple terms, it is what is known as a lean phase conveying system. In these systems, and in most vacuum conveyors that use a fan or regenerative blower as the motion source, the velocity of the air used for transfer is high, typically somewhere between 4000 and 6000 ft/min. At these velocities, erosion of the conveying line and excessive wear of the conveyor are common.

An essential element of the dense phase conveying is the vacuum receiver. High-quality, modular designs with filters down to 0.3 microns and secondary HEPA filters allow for simple cleaning and quick changes in the metal powder. Extensive testing using both a patented vacuum pump and the alternate rotary claw type electric vacuum pumps coupled to the vacuum systems suppliers have proven effective with the wide range of dense metal powders.


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