A flow path forming device is provided that includes: a first flow path forming member having a first flow path forming surface; and a second flow path forming member having a second flow path forming surface. The first flow path forming surface and the second flow path forming surface form a flow path through which a plastic composition flows. When a water droplet is deposited on a droplet deposition surface of each of the first flow path forming surface and the second flow path forming surface, and the droplet deposition surface on which the water droplet is deposited is tilted to measure a maximum droplet weight, an average value of the maximum droplet weight on the first flow path forming surface and the maximum droplet weight on the second flow path forming surface is 8 g or more and 25 g or less.

An article comprising a) a die core having a plurality of flow paths adapted to flow extrudable material to a plurality of slots including wall slots and skin slots and around a plurality of pins so as to form a honeycomb structure from the extrudable material; and b) a mounting plate adapted to hold the die core in an extrusion system having an opening adapted to allow the extrudable material passed through the die core to exit, an outer portion adapted to mount and hold the die core in place, a flange about the periphery of the opening which seats the die core, an inner surface disposed to partially form the skin slots adapted to allow extrudable material to flow from the skin slots to form the skin of the honeycomb structure; and wherein the die core and mounting plate are comprised of different materials having different wear properties.

The invention relates to an extrusion head and a method with which the thickness distribution of hollow bodies, for example, can be further improved. The extrusion head consists of at least one mandrel (1) and one nozzle (2), which have a rigid geometry and therefore cannot be varied or can also be deformed flexibly in some areas and form a flow channel (3), wherein the positions of the mandrel (1) and the nozzle (2) can be varied relative to one another, so that the geometry of a discharge gap (s) of the flow channel (3) can be varied while a melt is being discharged, wherein each head part has at least one head section with a uniform cross-sectional area in a discharge area (A) of the extrusion head, and wherein at least one head part has at least two head sections (B) and (C), each of which has a predominantly uniform cross-sectional area within the head section (B), (C), which are spaced axially apart from one another and which have mutually different cross-sectional areas.

Provided are extrusion tools such as extrusion dies or portions thereof having a surface with at least one coating thereon, and methods of forming the same are disclosed. The at least one coating is formed from a composition that is a metal aluminum nitride or carbonitride with particular characteristics such that the amount of aluminum varies within the coating between a coating outer surface and an intermediate thickness within the coating. The resulting coatings have tailored physical and performance characteristics that result in improved wear and extrusion performance.

An extruder for 3D FDM printing with a highly thermally conductive ceramic nozzle that allows for very high temperature operation suitable for printing metals and high melting point plastics, whilst also being hard wearing to cope with abrasive materials. A heating element is printed onto the nozzle to allow for high temperatures in a compact space. A skirt attached to the nozzle provides heating to already deposited material to assist in bonding metal as it is deposited, as well as fume extraction. A non-conductive ceramic down tube thermally isolates the nozzle from the material feed mechanism. All major parts are themselves 3D printed.

A three-dimensional printing pen includes a barrel open on a first end and having an opening for receiving a melt-substrate on a second end, opposite to the first end. A nozzle is configured to receive and melt said melt-substrate and arranged to be connected to the first open end of the barrel The pen further includes a channel inside the barrel with a first opening adjacent and aligned with the opening in the barrel for receiving said melt-substrate and a second opening, opposite to said first opening, adjacent to the nozzle. A transport mechanism has a rotatable transport member which is, in use, in contact with the melt-substrate for moving the melt-substrate through towards the nozzle.

A process for manufacturing a die for pasta, having, inside a body (1) of metal alloy, at least one dough extrusion passage (13) provided with an input section (ta) and an output section (tp) that are concentrically and consecutively arranged in the extrusion direction and are joined in a connection transversal cross-section, has a step of manufacturing the input section (ta) with a material having a low coefficient of friction and the output section (tp), which is cylindrically shaped, with a metal alloy so that the input section (ta) has transversal cross-sections with an area larger than the transversal cross-section area of the output section (tp). The dies themselves, and their use in the production of pasta, are described.

A die for forming a honeycomb structure, including: a second plate-shaped portion that is formed of iron and the like and has back holes; and a first plate-shaped portion that is formed of tungsten carbide based cemented carbide and has cavities communicating with the back holes and slits communicating with the cavities, with the first plate-shaped portion having a first layer arranged in the second plate-shaped portion side and a second layer arranged on the first layer, the cavities are opened on both sides of the first layer, and the slits are opened on both sides of the second layer.

On at least the edge portion (9e) of the lip portion (9) of a T-die (1), a cladding layer (10) is provided. The cladding layer is formed by laser build-up welding to a base material with a powder of a corrosion resistant and wear resistant alloy comprising a nickel-based alloy or a cobalt-based alloy. The cladding layer has a metallographic structure in which metal borides are dispersed in a binder phase. The lip portion has high quality and has high durability. The manufacturing costs of the T-die can also be kept relatively low.

Die plates for polymer extrusion may include a die plate having an entrance face for accepting a polymer flow and an exit face for extruding one or more polymer strands, wherein the exit face including at least one element constructed from polycrystalline diamond. Systems for extruding polymer may include: an extruder, a die plate attached to an outlet of the extruder and having (i) an entrance face for accepting a polymer flow and (ii) an exit face for extruding one or more polymer strands; an array of blades configured to rotate so as to contact and slide along the surface of the die exit face, thereby cutting the one or more polymer strands extruded therethrough; wherein (a) the exit face, (b) the blade array, or (c) each of the exit face and the blade array comprises at least one element constructed from polycrystalline diamond.