Abstract: A composite material may be prepared from a solid polymeric binder and a solid filler by feeding into an extruder the solid polymeric binder at a first feed rate and the solid filler at a second feed rate. The extruder extrudes an extrudate of the solid polymeric binder and solid filler to form the composite material. The composite material has a binder to filler ratio determined by the first feed rate and second feed rate. The solid polymeric binder and solid filler have different densities. Feeding the solid polymeric binder at the first feed rate and the solid filler at the second feed rate distributes the solid filler substantially homogeneously throughout the composite material.

Abstract: A three-dimensional print head apparatus may include a securing mechanism, a hopper, a nozzle, a heating system, and a fume extraction system. The securing mechanism may be adapted to secure to a wrist joint of a robotic arm. The hopper may have a cavity and a lower aperture and may be secured to the securing mechanism. The nozzle may have an upper aperture and a lower aperture. The heating system may be positioned along the barrel.

Abstract: A three-dimensional print head apparatus including a hopper, a nozzle, a barrel, and a heating system. The apparatus may further include a fume extraction system and a dry air purge system. The hopper may have a cavity and a lower aperture. The nozzle may have an upper aperture and a lower aperture. The heating system may be positioned along the barrel, and the dry air purge system may be in fluid communication with the hopper.

Abstract: A three-dimensional print head apparatus comprising a hopper, a nozzle, a barrel, a heating system, a fume extraction system, a dry air purge system, and an agitator. The hopper may having a cavity and may have a lower aperture. The nozzle may have an upper aperture and may have a lower aperture. The heating system may be positioned along at least a portion of the barrel, which may defined a heated zone of the barrel. The dry air purge system may be in fluid communication with the hopper. The agitator may have at least one paddle.

Abstract: An interlocking paver system including a polygon paver and a spacer paver is provided. The polygon paver may have a top level having a top level polygon paver perimeter and a bottom level secured to and protruding from the top level and having a bottom level polygon paver perimeter contained within the top level polygon paver perimeter. The spacer paver may have a top level having a top level spacer paver perimeter and a bottom level secured to and protruding from the top level and having a bottom level spacer paver perimeter extending beyond an entirety of the top level spacer paver perimeter. The spacer paver may be configured to selectively interlock with the polygon paver. The top level spacer paver perimeter, top level polygon paver perimeter, and bottom level spacer paver perimeter are different from one another.

Abstract: A three-dimensional print head apparatus may include a securing mechanism, a hopper, a nozzle, a heating system, and a fume extraction system. The securing mechanism may be adapted to secure to a wrist joint of a robotic arm. The hopper may have a cavity and a lower aperture and may be secured to the securing mechanism. The nozzle may have an upper aperture and a lower aperture. The heating system may be positioned along the barrel.

Abstract: A three-dimensional print head apparatus including a securing mechanism, a hopper, a nozzle, a barrel, and a heating system. The securing mechanism is adapted to secure to a wrist joint of a robotic arm. The hopper is secured to the securing mechanism and has a cavity and a lower aperture. The nozzle has an upper aperture and a lower aperture. The barrel has an elongate, hollow member with a first end secured to the lower aperture of the hopper and a second end secured to the upper aperture of the nozzle. The heating system is positioned along the barrel.

Abstract: An interlocking paver system including a polygon paver and a spacer paver is provided. The polygon paver may have a top level having a top level polygon paver perimeter and a bottom level secured to and protruding from the top level and having a bottom level polygon paver perimeter contained within the top level polygon paver perimeter. The spacer paver may have a top level having a top level spacer paver perimeter and a bottom level secured to and protruding from the top level and having a bottom level spacer paver perimeter extending beyond an entirety of the top level spacer paver perimeter The spacer paver may be configured to selectively interlock with the polygon paver. The top level spacer paver perimeter, top level polygon paver perimeter, and bottom level spacer paver perimeter are different from one another.

Abstract: An interlocking paver system including polygon and spacer pavers. The polygon paver has a longitudinal axis extending from a first to a second side and a transverse axis orthogonal to the longitudinal axis and extending from a third to a fourth side. The spacer paver has a longitudinal axis extending from a first to a second side and a transverse axis orthogonal to the longitudinal axis and extending from a third to a fourth side. Both the polygon and spacer pavers are symmetrical about the longitudinal and transverse axes. The spacer paver is configured to selectively interlock with the polygon paver with either of the third or fourth side of the polygon paver adjacent either of the first or second side of the spacer paver and either of the first or second side of the polygon paver adjacent either of the third or fourth side of the spacer paver.

Abstract: A three-dimensional print head apparatus including a securing mechanism, a hopper, a nozzle, a barrel, and a heating system. The securing mechanism is adapted to secure to a wrist joint of a robotic arm. The hopper is secured to the securing mechanism and has a cavity and a lower aperture. The nozzle has an upper aperture and a lower aperture. The barrel has an elongate, hollow member with a first end secured to the lower aperture of the hopper and a second end secured to the upper aperture of the nozzle. The heating system is positioned along the barrel.

Abstract: An interlocking paver system including polygon and spacer pavers. The polygon paver has a longitudinal axis extending from a first to a second side and a transverse axis orthogonal to the longitudinal axis and extending from a third to a fourth side. The spacer paver has a longitudinal axis extending from a first to a second side and a transverse axis orthogonal to the longitudinal axis and extending from a third to a fourth side. Both the polygon and spacer pavers are symmetrical about the longitudinal and transverse axes. The spacer paver is configured to selectively interlock with the polygon paver with either of the third or fourth side of the polygon paver adjacent either of the first or second side of the spacer paver and either of the first or second side of the polygon paver adjacent either of the third or fourth side of the spacer paver.