| CPC B29C 64/209 (2017.08) [B29C 64/295 (2017.08); B29C 64/314 (2017.08); B29C 64/321 (2017.08); B29C 64/393 (2017.08); B33Y 30/00 (2014.12); B33Y 40/10 (2020.01); B29C 64/118 (2017.08); B33Y 50/02 (2014.12)] | 19 Claims |
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1. A print head for additive manufacturing, comprising:
a first hob;
a second hob, wherein the first hob and the second hob are suitable to receive and extrude therebetween a print material filament for the additive manufacturing;
one or more motors capable of imparting a rotation to at least the first hob, wherein the extrusion results from the rotation;
a threaded element; and
an eccentric force element comprising:
a body;
at least a spring and a cam;
wherein the body is coupled to the spring and the threaded element;
wherein the body is coupled to the cam to create a hinge;
wherein the threaded element is configured such that the spring has potential energy to impart a linear force onto the body that in turn imparts a rotational force at the hinge to urge the second hob toward the first hob;
wherein the spring comprises an air spring capable of applying the exerted force dynamically to the second hob.
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