An extrusion head of an extruder is configured to move along a feedpath independently from a heating element so that the extrusion head can yield to extrusion-related forces. Specifically, the extruder may include an extrusion head movably coupled to a thermal core to permit axial displacement of the extrusion head relative to the thermal core. In use, the extrusion head may be displaced within the thermal core when the extruder is subject to extrusion-related forces (e.g., an upward force created by a refraction of build material or a downward force created by an advance of build material). This motion can facilitate better transitions by the extruder between different layers or z-axis positions in a model during fabrication.

The extrusion device of a solid film comprises a cell provided with an input opening of a material designed to form the solid film, and an output opening of the solid film from the cell. The device comprises a first heat exchanger for applying a first temperature to the output opening and a second heat exchanger for applying a second temperature in a first zone of the cell distinct from the output opening and a control circuit imposing first and second sets of first and second temperatures. The first set enables a volume of the material in solid phase to be formed. The second set enables a temperature gradient to be generated in the volume so as to generate a pressure forcing extrusion of the solid film via the output opening.

An apparatus for extruding a jacket and/or insulative material onto an extruded product with one or more longitudinal stripes incorporated onto the surface of said extruded product comprising a body, a primary feed conduit for conveying a primary extrusion material, a striping die, a secondary feed conduit for conveying a secondary extrusion material, a striping die adapter, a striping feed conduit extending through the striping die adapter for conveying striping extrusion material. The striping die adapter may also include a thermocouple for maintaining the viscosity of the striping extrusion material and a thermocouple for monitoring the temperature of said striping die adapter. The striping die includes one or more striping extrusion outlets for conveying striping extrusion material onto the extruded product. The striping die may also include a wishbone-shaped trough for delivering equal amounts of striping extrusion material to said extrusion outlets for extrusion onto the product.

Automatic process control of additive manufacturing. The system includes an additive manufacturing device for making an object and a local network computer controlling the device. At least one camera is provided with a view of a manufacturing volume of the device to generate network accessible images of the object. The computer is programmed to stop the manufacturing process when the object is defective based en the images of the object.

A compression system includes a compression device and a controller. A treated material is pressed longitudinally through a compression chamber by simultaneously applying a lateral pressure and a two-dimensional cross-section compression which includes a pressure applied in a direction traverse to a direction of transport and a pressure applied in a direction parallel to the direction of transport. The controller controls the two-dimensional cross-section compression applied to the treated material such that, during compression, liquids in the treated material migrate to the outer surface of the treated material upon reaching the outlet orifice.

A three-dimensional drawing device can include a housing configured for to be held in user's hand, shaped to allow manipulation of the housing like a pen, and configured to accept a strand of thermoplastic material. The drawing device has a nozzle assembly with an exit nozzle and a motor connected to a gear train that engages the strand such that rotation of the motor causes the feed stock to be extruded out of the exit nozzle to form a three-dimensional object. The motor can be controlled using a variable speed control mechanism or first and second actuators, thereby controlling movement of the strand, for example, to advance or retract the strand relative to the nozzle assembly.

A wax melt blank is produced with an extrusion process and intended to later be cut to length into individual wax melts. The wax melt blank includes at least about fifty percent by weight of wax, a fragrance, and up to about fifty percent by weight of a filler. The wax, the fragrance, and the filler are homogeneously dispersed within the wax melt blank.

The invention relates to a die device (10) for an extrusion blow-molding apparatus (100) for producing a multilayered blown film (300), with an inner surface (310) and an outer surface (320), having a die orifice for the discharge of a multilayered material melt (300), wherein a temperature-control device (30) is arranged in order to set a different temperature on the two sides (310, 320) of the material melt (300). The invention also relates to a method for equalizing the differences in viscosity of the materials of the layers (350) by a controlled (40, 60) temperature setting.

A flexible tubing material includes a radiation crosslinked blend of a first elastomeric polymer including a styrenic thermoplastic elastomer, an ethylene vinyl acetate elastomer, a polylefin elastomer with a second elastomeric polymer including a polyolefin elastomer, a diene elastomer, or combination thereof, with the proviso that the first elastomeric polymer and the second elastomeric polymer are different. In an embodiment, a method of making a material includes providing the first elastomeric polymer, providing the second elastomeric polymer, blending the first elastomeric polymer and the second elastomeric polymer, extruding or injection molding the blend, and crosslinking the blend with radiation.

A method for controlling the temperature of a polymer melt in an extrusion tool includes flowing the polymer melt via at least one flow channel from an input to an output and around at least one temperature-control element in the at least one flow channel. The temperature control element includes a plurality of temperature control units. The temperature of the polymer melt flowing around the temperature-control element is controlled by individually controlling each of the temperature-control units so as to vary a degree of temperature control of the temperature-control element such that a degree of temperature control is controllable to be the same or different at locations throughout the temperature control-element.