Depositing portions of fiber-reinforced thermoplastic filament while alleviating torsional forces

A method for additive manufacturing of an object, the method comprising:

• receiving, by a controller, a model of the object, wherein the model is based on the object being manufactured from thermoplastic filament;
• determining, by the controller and based on the model, that a bend having non-zero angle θ is to be introduced in a downstream portion of a thermoplastic filament while being deposited on the object being manufactured, wherein a first end of the downstream portion is defined as where the filament is to begin to deviate from a straight line in accordance with the bend, wherein angle θ is measured from the first end, and wherein the thermoplastic filament comprises a longitudinal axis L;
• adding, by a first heat source, a first amount of heat to an upstream portion of the thermoplastic filament while being supplied for deposition, based on determining that the bend is to be introduced;
• twisting, by a twisting device, the upstream and downstream portions of the thermoplastic filament by a non-zero angle φ around the longitudinal axis L, after the first amount of heat is added;
• and
• depositing, by a deposition head, the downstream portion of the thermoplastic filament on the object being manufactured, after the twisting of the downstream portion of the thermoplastic filament occurs and in accordance with the bend.

A method for additive manufacturing of an object, the method comprising:

• adding, by a first heat source, a first amount of heat to an upstream portion of thermoplastic filament while being supplied for deposition on an object being manufactured from the thermoplastic filament, wherein the adding of the first amount of heat is based on whether a bend is to be introduced in a downstream portion of the thermoplastic filament, wherein a first end of the downstream portion is defined as where the filament is to begin to deviate from a straight line in accordance with the bend that is to be introduced into the downstream portion, wherein the bend has a non-zero angle θ as measured from the first end, and wherein the thermoplastic filament comprises a longitudinal axis L;
• twisting, by a twisting device, the upstream and downstream portions of the thermoplastic filament by a non-zero angle φ around the longitudinal axis L, after the first amount of heat is added;
• adding, by a second heat source, a second amount of heat to the downstream portion of the thermoplastic filament while being supplied for deposition on the object being manufactured, wherein the second amount of heat is sufficient make the downstream portion pliable for deposition;
• and
• depositing, by a deposition head, the downstream portion of the thermoplastic filament on the object being manufactured, after the adding of second amount of heat occurs and in accordance with the bend.