A method for producing an electrically conductive seamless tube includes (1) preparing an electrically conductive resin composition containing a thermoplastic resin and an electrically conductive filler, (2) preparing a cylindrical extruding die including a cylindrical slit, at least one circumferential distribution channel communicating with the slit and distributing the resin composition that is plasticized in a circumferential direction of the slit, and at least one lead-in path that leads the plasticized resin composition into the circumferential distribution channel, the lead-in path containing a line mixer; (3) introducing the plasticized resin composition into the lead-in path toward the circumferential distribution channel; (4) introducing the plasticized resin composition flowing through the lead-in path into the circumferential distribution channel toward the slit; and (5) introducing the resin composition flowing through the circumferential distribution channel into the slit and extruding the resin composition from an outlet of the slit into a cylindrical shape.

An electrode structure has a layer of at least two interdigitated materials, a first material being an electrically conductive material and a second material being an ionically conductive material, the materials residing co-planarly on a membrane in fluid form, at least one of the interdigitated materials forming a feature having an aspect ratio greater than one. A method of forming an electrode structure includes merging flows of an electrically conductive material and a second material in a first direction into a first combined flow, dividing the first combined flow in a second direction to produce at least two separate flows, each separate flow including flows of the electrically conductive material and the second material, merging the two separate flows into a second combined flow, repeating the merging and dividing flow as desired to produce a final combined flow, and depositing the final combined flow as an interdigitated structure in fluid form onto a substrate such that at least one of the materials forms a feature in the structure having an aspect ratio greater than one.

Spaghetti-like long shaped pasta having a continuous internal longitudinal cavity communicating with the outside through a co-extended longitudinal slot with convex edges closing the internal cavity; and device for production thereof that includes an extrusion drawing having, on the entry front, least two holes each having complementarily identical openings for introduction within respective channels of identical shape, configuration and size; that end in a joint discharge channel, near an edge of an expanded head. An occlusion of the outlet hole of the discharge channel includes a septum separating the delivery channels, causing the two flows of extruded pasta to join solely on a peripheral portion, opposite to the edge, the expanded head producing the central compartment, developing longitudinally within the finished product and communicating with the outside through a co-extended cutting or fissure.

A system and method of regulating a pressure of a fluid with a valve block having a valve block inlet in fluid communication with an outlet of an extruder and a valve block outlet in fluid communication with a die. A transducer in fluid communication with the flow channel and in signal communication with a controller of the motor can sense a pressure and communicate the pressure to a controller of a motor. The motor can adjust a position of a valve to regulate the pressure of the fluid.

Apparatus and methods for extruding plastic materials are disclosed. An exemplary apparatus comprises: a feeding portion; a melting portion in communication with the feeding portion and configured to transmit heat into material received from the feeding portion; and an output die in communication with the melting portion to permit extrusion of the material. The melting portion comprises: a melting barrel having an inner surface defining a melting chamber in communication with the feeding portion; and a melting insert inside the melting chamber. The melting insert comprises an outer surface in contact with the inner surface of the melting barrel where the outer surface comprises one or more open-ended channels formed therein. In some embodiments, the feeding portion and the melting portion may be thermally insulated from each other and a propeller of the feeding portion may be disposed entirely outside of the melting portion.

A system and method are presented in which a flow of plastic is extruded to obtain nano-sized features by forming multiple laminated flow streams, flowing in parallel through the non-rotating extrusion system. Each of the parallel laminated flow streams are subjected to repeated steps in which the flows are compressed, divided, and overlapped to amplify the number of laminations. The parallel amplified laminated flows are rejoined to form a combined laminated output with nano-sized features. The die exit is formed to provide a tubular shape.

A system and method are presented in which a flow of plastic is extruded to obtain nano-sized features by forming multiple laminated flow streams, flowing in parallel through the non-rotating extrusion system. Each of the parallel laminated flow streams are subjected to repeated steps in which the flows are compressed, divided, and overlapped to amplify the number of laminations. The parallel amplified laminated flows are rejoined to form a combined laminated output with nano-sized features. The die exit is formed to provide a tubular shape.

The invention relates to a printhead (100) for a 3D printer, comprising an actuating device (110) arranged in a housing (1) of the printhead (100) for actuating a piston (3), a supply device (2) for a printable material (10), a flange (5) with a cooling device (50), said flange being arranged at the housing (1) and the supply device (2), a nozzle head (6) with heating elements (61, 63) for converting the material (10) from a solid phase (10) into a liquid phase (12) and a nozzle (8) for discharging the liquid phase (12) of the material (10) out of the nozzle head (6). According to the invention, a pocket piece (7) is arranged inside the nozzle head (6).

A method for producing the fluororesin tube, the method including a step of subjecting a thermoplastic fluororesin to melt extrusion molding at a temperature of about 260 to 450 C., wherein the thermoplastic fluororesin is selected from the group consisting of a tetrafluoroethylene-hexafluoropropylene copolymer and a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, wherein in the melt extrusion molding, a flow path of the molten thermoplastic fluororesin is temporarily branched to form a weld line in a lengthwise direction in the fluororesin tube. In some cases, the fluororesin tube has tearing property in a lengthwise direction and the method includes subjecting the thermoplastic fluororesin, a filler and/or a contrast agent to the melt extrusion molding.

A system for manufacturing a gradient material structure comprises a proportioner feedblock section and a mixer feedblock section. The proportioner feedblock section has a first flow inlet for receiving a first polymer material in melted form, a second flow inlet for receiving a second polymer material in melted form, and one or more proportioner channels. Each mixer channel may 2024/159199 be configured to simultaneously receive from the corresponding proportioner channel the first polymer material at a first volume flow rate and the second polymer material at a second volume flow rate. Bic ratio between the first and second volume flow rates may be defined by a polymer transfer ratio for the respective mixer channel. The polymer transfer ratios may differ between two or more of the mixer channels. Each proportioner channel may be housed within a respective insert cassette removably mounted within the remainder of the proportioner feedblock section.