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.

An additive manufacturing system has a controller configured to operate an actuator to move a multi-nozzle extruder in an XY plane and rotate the multi-nozzle extruder about an axis perpendicular to the XY plane while operating the multi-nozzle extruder to form swaths in the XY plane. The controller operates the actuator and the multi-nozzle extruder to keep the nozzles of the extruder within perimeters formed for an object and to vary the speed and rotation of the extruder while extruding material to form precise structures.

To solve problems of complication and malfunction of the device's structure, an increase in the process time, and malfunction caused by catching of a front end portion of a bead apex rubber. A bead apex rubber forming method comprises a forming step P1, a connecting space opening step P2, a connecting space closing step P3, and a connecting step P4. In a rear closed state R of a molding chamber 11, the forming step P1 injects unvulcanized rubber G while a bead core A is being rotated, and forms a bead apex rubber B having a front end portion Bf. when the front end portion Bf approaches a rear shutter part 9, the connecting space opening step P2 removes a second lateral surface S2 together with the rear shutter part 9, and forms, between the front end portion Bf and a rear end portion Br, a connecting space J whose second side surface S2 side is opened. The connecting space closing step P3 closes the connecting space 3 by disposing a third lateral surface S3 extending between the rear end portion Br and the front end portion Bf. The connecting step P4 injects the unvulcanized rubber into the connecting space J closed, and connects between the rear end portion Br and the front end portion Bf integrally.

The invention relates to a gluing process of an adhesive composition with the use of a gluing nozzle having an extrusion die for continuous extrusion of an adhesive composition over a predetermined width, the extrusion die (20) comprising a lower lip (22) and an upper lip (24), the upper and lower lips (24, 22) extending parallel to one another so as to form a transverse channel (28) for the longitudinal flow of the adhesive composition, the transverse channel extending longitudinally between: a supply opening (30) for supplying the adhesive composition; and an extrusion outlet (34) for extrusion of the adhesive composition (34); the channel (28) comprising a concave volume (32) for relaxation of the adhesive composition between the supply opening (30) and the gluing outlet (34).

A tube forming apparatus for forming polymeric tubing includes a housing between rear and discharge ends. The tube forming apparatus includes a core tube assembly with an exterior core tube and an inner core tube positioned partially therein and in an interior area of the housing. The tube forming apparatus includes a die that has an inner die-surface. A diverter tip is mounted in and extends from the inner core tube into the die forming a die opening between the die and the diverter tip. The tube forming apparatus includes a core tube adjustment system mounted proximate the rear end which includes an axial displacement device configured to axially position the core tube assembly for modulating wall thickness of the tube and/or an angular displacement device configured to modulate the inner core tube for modulating concentricity of the tube.

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.

An apparatus for fabricating a three-dimensional object from deposition of layers made of reinforcement material and of extrudable material is described. The apparatus comprises: an extrusion assembly comprising a feeder having a longitudinal hole adapted for conveying the reinforcement material and wherein the feeder is adapted for conveying the extrudable material at least partly outside the longitudinal hole; a reinforcement material driving mechanism for driving the reinforcement material to the extrusion assembly; and a building platform on which is made the deposition of layers of reinforcement material and of extrudable material.

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.

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.

The present invention relates to methods for forming films. In particular, the present invention relates to the formation of films on a substrate via the use of individual pumps to deposit individual wet film products onto a substrate.