公开(公告)号：US20220016837A1

公开(公告)日：2022-01-20

申请号：US17294116

申请日：2019-11-14

Applicant: Stratasys, Inc.

Inventor： Matt PeKarna ,  Shawn Koop ,  Peter Schuller ,  Jordan Nadeau ,  David Alvig

IPC: B29C64/227 ,  B33Y40/00 ,  B29C64/118 ,  B29C64/321 ,  B65H51/10

Abstract: A filament drive mechanism for use with an additive manufacturing system includes at least first and second drives. Each drive includes a first rotatable shaft and a second rotatable shaft engaged with the first rotatable shaft in a counter rotational configuration. Each drive includes a pair of filament engagement elements, one on each rotatable shaft, and positioned on opposing sides of the filament path with a gap therebetween so as to engage a filament provided in the filament path. The drive mechanism includes a bridge follower configured to rotatably couple the first drive to the second drive wherein one of the shafts is a drive shaft configured to be driven by a motor at a rotational rate selected to advance the filament at a desired feed rate and to cause the other shafts to rotate at the same rotational rate, such that each pair of filament engagement teeth will engage a filament in the filament path and will coordinate to advance the filament while counter-rotating at the same rotational rate to drive the filament into a liquefier.