During the printing of a job in a MJF 3D printer, a thin layer of dust is deposited inside the print zone.
This dust must be removed before starting a new job to get 3D parts of good quality and to avoid
breakdowns. As the print zone is a hot area, when the job is finished the operator must disconnect the
printer, wait until the temperature lowers to a safe level, manually clean the print zone, power up the
printer and wait the warming up to the working temperature.
In order to reduce the waiting time and to save energy, an automatic cleaning system has been designed
that allows the printer to clean itself at hot temperature.
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INC, HP, "3D PRINTER AUTO-CLEANING OF POWDER IN PRINT ZONE BETWEEN JOBS", Technical Disclosure Commons, (March 09, 2020)