Abstract: A modular disk coextrusion die is formed of a plurality of cells stacked together. Each cell includes a symmetrical arrangement of thin annular disks, including a central routing disk and two distribution disks on both sides of the central routing disk. The distribution disks are oriented so that their respective distribution inlet openings oppose each other by about 180 degrees. The symmetrical arrangement permits each cell to process the melt streams in a manner that provides enhanced layer uniformity and bubble stability. By stacking several cells, blown films having up to several hundred layers can be made using twelve, twenty-four or more polymer melt streams.

Abstract: Described is a self-cleaning extrusion orifice assembly including an enclosure, a cylindrical body inserted into the enclosure and terminated by an extrusion orifice. The self-cleaning extrusion orifice assembly is operated by a pressurized air flow. The pressurized air flow flushes surfaces of some elements of self-cleaning extrusion orifice assembly removing debris that could be deposited on these surfaces. In addition, some elements of self-cleaning extrusion orifice assembly are configured to scrape extrusion process debris from the same surfaces.

Abstract: The present invention provides a spider for a die head and die tooling that utilizes curved flow guides to direct the flow of plastic through the die head and die tooling. The spider leg splits the stream of plastic flowing through the spider into two independent streams at the upstream end. The downstream end comprises two curved flow guides that are configured to direct the two streams of plastic towards a longitudinal center plane of the spider leg. The turbulence caused by the curved flow guides creates obtuse or acute angled welding lines between the two streams of plastic. These obtuse and acute angled welding lines provide stronger bonds than the known spider legs that create butt welding or right angled welding lines.

Abstract: A mouthpiece (10) for extruding a molding compound into a formed body which has internal channels, comprises: a mouthpiece frame (14) with a frame opening (16); a first core retaining plate (22) which is fastened in the area of an upstream end of the frame opening (16) when viewed in the flow direction (15) of the molding compound; and a plurality of longitudinal cores (28) which are axially and laterally held by an upstream end section (26) on the first core retaining plate (22). It is proposed that, furthermore, it comprises a second core retaining plate (36) which is loosely arranged downstream of the first core retaining plate (22) relative to the mouthpiece frame (14) in the flow direction (15), and in which the areas (32) of the cores (28) farther from the upstream end section (26) are arranged to be radially fixed but axially loose.

Abstract: A tyre strip extrusion apparatus includes extruders and an extrusion head which includes a head housing having feed openings respectively connected to the extruders for feed of extrusion material. An injection moulding tool is connected to the head housing and includes a profile plate formed with an outlet opening which communicates with the feed openings for extrusion material to flow from the feed openings to the outlet opening for extruding a web from the extrusion material. Bearing against the head housing along a first parting surface is a first distributor plate. A second distributor plate is arranged upstream of the profile plate in flow direction of the extrusion material. The first distributor plate bears along a second parting surface against the second distributor plate. The first and second distributor plates are configured such that at least a majority of the material paths runs through the first and second parting surfaces.

Abstract: A system and method for treating or processing granular absorbent while the granular absorbent is being transported in a fluid stream that preferably is a stream of air. The system includes a pneumatic conveyor with a conduit that draws pellets exiting an extruder into the conduit drying the pellets as they are transported through the conduit. Material can be introduced that dries, coats or otherwise treats the pellets while the pellets are transported through the conduit. Coating material, e.g., powdered bentonite can coat and also dry pellets during transport. A conduit can have inner pellet treating surface that abrades pellets transported through the conduit producing smaller fines that can be packaged with pellets forming a granular absorbent product that forms clumps on top that extend generally horizontally.

Abstract: An extruder has a valve assembly configured to move pins to open and close the nozzles in a multi-nozzle extruder head independently. The pins of the valve assembly that are driven by actuators into and out of engagement with nozzles in the extruder head are positioned within sleeves that extend between the valve assembly and the extruder head. A gap is provided between the extruder head and the end of the sleeves proximate the extruder head to enable thermoplastic material leaking from the extruder that contacts the pins to remain in a melted or plastic state so the thermoplastic material does not interfere with the movement of the pins.

Abstract: A metal mold for manufacturing a honeycomb structure having a plurality of cell density regions and an annular boundary wall includes a honeycomb-like slit part, which is opened to an extrusion surface of a single metal mold body, that is formed of a plurality of cell slits for forming the plurality of cell density regions and an annular boundary slit for forming the boundary wall. Out of the plurality of cell slits, adjacent cell slits adjacent to the boundary slit have all corner portions formed in a round shape by the adjacent cell slits and the boundary slit.

Abstract: A secure extruder device includes a material delivery channel, a nozzle part, a parameter part, a thermal-control part, a material auto-destruction module and/or a parameter auto-destruction module. The material delivery channel is assembled with an extrusion part. The nozzle part is connected to the material delivery channel for ejecting material in the material delivery channel out. The parameter part provides parameters for a printing task to a microcontroller. The thermal-control part heats the nozzle part according to the parameters for the printing task. The material auto-destruction module destroys the material delivery channel after the printing task is completed. The parameter auto-destruction module destroys the parameters for the printing task after the printing task is completed. The microcontroller controls the extrusion part based on the parameters for the printing task so that the extrusion part delivers the material disposed inside the material delivery channel to the nozzle part.

Abstract: An apparatus for making spunbonded nonwoven has a spinneret for emitting the continuous filaments in a filament-travel direction, a cooling chamber downstream in the direction from the spinneret and receiving the filaments, and two air-supply manifolds flanking the chamber for feeding cooling air thereinto transverse to the direction. A flow straightener for equalizing flow of the cooling air on the filaments is provided in at least one of the air-supply manifolds and has passage walls forming a plurality of flow passages that extend transversely to a filament-travel direction. A flow cross section of the flow straightener is greater than 85% (preferably more than 90%) of a cross-sectional size of the straightener, a ratio of a length L of the flow passages to an inner diameter Di of the flow passages L/Di is 1 to 15.

Abstract: Various techniques involve a device for entangling a plurality of individual threads of a composite thread in a melt-spinning process for the production of crimped yarns. The device to this end has a plurality of entanglement nozzles which are collectively held on a support. In order to enable a flexible utilization of the entanglement nozzles and of thread guiding, the entanglement nozzles on the support are assigned at least one thread guide in such a manner that the threads are guidable optionally in the entanglement nozzles and/or in the thread guide.

Abstract: A die structure is provided. The die structure may have a die body, a mandrel having a magnet and/or one or more magnet assemblies, a first magnetic structure, a second magnetic structure and/or one or more magnetic structures. The first magnetic structure may be configured to apply a first magnetic force to the mandrel, in a first direction. The second magnetic structure may be configured to apply a second magnetic force to the mandrel, in a second direction opposite the first direction. The one or more magnetic structures may be configured to apply one or more magnetic forces to the mandrel. Application of the first magnetic force, the second magnetic force and/or the one or more magnetic forces to the mandrel supports the mandrel to be levitated within the die body and/or causes the mandrel to rotate and/or to maintain a position within the die body.

Abstract: A spinneret (1) for producing several filaments, comprising a plurality of perforations (2), each of which ends on the bottom side of the spinneret (1) into a respective outlet opening (3) for pressing a thermoplastic there through for forming the filaments, wherein the outlet openings (3) are arranged in rows (5) which extend along a cooling direction (A), from one side of the spinneret (1) to the opposite side, wherein these rows (5) are arranged increasingly close together, away from a line (C), along this cooling direction (A) and through the centre of the spinneret (1).

Abstract: An extrusion system including an edge encapsulation block is disclosed. The edge encapsulation block includes a housing that defines a central extrusion channel having an inlet for receiving a central material and an outlet for emitting an encapsulated material that includes the central material and an edge material, and an edge encapsulation channel for receiving the edge material. The encapsulation block also includes an edge blocker that includes an edge actuator at a first end of the edge blocker and an edge block at a second end of the edge blocker that is opposite the first end. Actuation of the edge actuator causes the edge block to translate from a first position to a second position spaced from the first position along an axis that extends through the central extrusion channel.

Abstract: The present disclosure relates to methods and systems for manufacturing rotational spun materials. The rotational spun materials are medical appliances or other prostheses made of, constructed from, covered or coated with rotational spun materials, such as polytetrafluoroethylene (PTFE).

Abstract: A method and apparatus for resistive heating usable in composite-based additive manufacturing is disclosed. The method includes providing a prepared stack of substrate sheets, placing the stack between electrode assemblies of a compression device, applying a current to thereby heat the stack to a final temperature to liquefy applied powder, compressing the stack to a final height, cooling the stack, and removing the cooled, compressed stack from the compression device. The apparatus comprises at least two plates, a power supply for providing current, a first electrode assembly and a second electrode assembly.

Abstract: A method and apparatus for extrusion of an article is provided. A die assembly can apply flows of thermoplastic material to an array of reinforcing cables to form a composite extrusion. A slider fabric can be bonded to one side of the composite extrusion. After exiting the die assembly, the slider fabric can act to support the extrudate as it passes along an elongate mandrel, which can cause the base of the slider fabric to change shape from a flat profile to the final internal profile of the article. The extruded article can then be cooled to solidify the material. The die can include cooling for the slider fabric and means for promoting penetration of the thermoplastic into reinforcing cables.

Abstract: A corrugator for an extrusion system for shaping a tubular plastic product, having a multiplicity of mould blocks, a guide track, along which the mould blocks are guided in each case in pairs during the operation of the corrugator from a starting region of the guide track towards an outlet region of the guide track, a first return track, along which the mould blocks are guided during the operation of the corrugator from the outlet region towards the starting region, and a second return track, with the aid of which individual mould blocks can be removed from the first return track and/or can be inserted into the latter during the operation of the corrugator.

Abstract: A nozzle is disclosed for use with an additive manufacturing system. The nozzle may include a first channel fluidly connectable to a matrix reservoir and configured to discharge a liquid matrix received from the matrix reservoir. The nozzle may also include a second channel operatively connected to the first channel configured to discharge a reinforcement into a bed of the liquid matrix discharged by the first channel.

Abstract: A method of operating an additive manufacturing system feeds solid extrusion material into a heater using a slip clutch coupled to an actuator of a mechanical driver to supply thermoplastic material into a manifold in an extruder head. The method sets a speed of the actuator so the actuator operates at a rotational speed that is slightly greater than the rotational speed of the mechanical mover. This method helps maintain the pressure of the thermoplastic material in the manifold of the extruder head in a predetermined range no matter how many nozzles are opened in the extruder head.