An extruder containing a housing having a flow channel for a melt and a perforated plate delimiting the flow channel on the outlet side, where the perforated plate has at least two through-flow areas spaced apart from one another, each through-flow area contains at least one through-flow opening, and the perforated plate is furthermore mounted in a changing device, where the changing device has guide elements, in which the perforated plate can be moved substantially perpendicularly to the flow channel, and the extruder, directly ahead of the perforated plate when viewed in the direction of flow of the melt, has an inlet flow cone, which is structurally separate from the perforated plate, thus allowing the through-flow areas of the perforated plate to be moved relative to the inlet flow cone.

An injection molding machine uses a native controller and a retrofit controller to effectively control its operation. The controllers may determine and/or receive information regarding the machine's maximum load capacity, and may also determine a current operational load value of the machine. The retrofit controller may cause the machine to operate at any number of combinations of settings of operational parameters which result in the machine operating at or below the maximum load value by adjusting any number of machine parameters associated with the injection molding machine based on feedback sensors measuring real-time operating conditions of the machine.

The present invention relates to a method enabling either the selection, the modification of existing and/or the creation of newly developed polymer materials which may provide an improved response to the application of a local shear and/or extensional deformation inside the polymer melt in different manufacturing technologies such as and without being exclusive injection molding (IM), injection stretch blow molding (ISBM), direct injection (DI), extrusion blow molding (EBM), sheet extrusion, thermoforming, etc. In addition, a method for manufacturing a polymer article is provided comprising injecting or extruding a molten polypropylene, polyethylene or polyester based polymer for converting it into a (semi) final shape while applying a shear and/or extensional deformation on the polymer melt, wherein applying shear and/or extensional deformation on the polymer melt comprises selectively modifying the flow path of the molten semi-crystallizable polymer as a function of local pressure profile over at least part of the flow path, said local pressure profile being determined as a function of optimized response of the polymer melt to the applied local shear and/or extensional deformation over at least said part of the flow path.

The present disclosure relates to a 3D printer (1) for 3D printing of a construct. The 3D printer (1) has a print bed (2). The 3D printer further comprises at least one actuating tool head (3) with an extrusion element (4), wherein the extrusion element and the print bed are movable in relation to each other. The 3D printer also comprises at least one sensor (5) arranged to sense a force applied to the print bed (2) by the extrusion element (4), or vice versa. The 3D printer additionally comprises a control element (7) arranged to detect when the sensed force exceeds a predetermined value and to record a position of the print bed or extrusion element related to the detection that the predetermined value is exceeded. The present disclosure also relates to corresponding methods and computer programs.

Systems and methods are disclosed for adjusting thickness of an extrudate in an extrusion die system. A lip adjustment assembly includes an engagement member connected to a movable lip of an extrusion die and being movable in a first and second direction opposite the first direction; an actuator configured to move the engagement member in the first and second directions; a coupler connected to both the engagement member and the actuator and disposed between the engagement member and the actuator; and an insulator on the coupler and configured to impede conduction of heat from the engagement member to the actuator. When the engagement member is moved in the first direction, the movable lip is moved toward a second lip of the extrusion die, and when the engagement member is moved in the second direction, the movable lip is moved away from the second lip.

An extrusion blow molding method includes detecting an exit velocity of a tube exiting a head during a blow molding cycle for forming the tube. A melt accumulator receives part of the melt conveyed by an extruder or discharges melt in addition to the melt conveyed by the extruder in dependence on the detected exit velocity. The melt accumulator discharges melt if the detected exit velocity is less than a target value for the exit velocity and receives melt if the detected exit velocity is greater than the target value for the exit velocity.

An additive manufacturing system for printing three-dimensional parts, the system comprising a heatable chamber with a port, a print foundation, a print head configured to print a three-dimensional part onto the print foundation in a layer-by-layer manner along a printing axis, and a drive mechanism configured to index the print foundation along the printing axis such that, while the print head prints the three-dimensional part, the print foundation and at least a portion of the three-dimensional part pass through the port and out of the heated chamber.

A nozzle for printing three-dimensional parts with an additive manufacturing system, the nozzle comprising a nozzle body having an inlet end and a tip end offset longitudinally from the inlet end, a tip pipe for extruding a flowable material, an inner ring extending circumferentially around the tip pipe at the outlet end, an outer ring extending circumferentially around the inner ring, at least one annular recessed groove located circumferentially between the inner ring and the outer ring.

Provided is a carbon fiber reinforced plastic material having excellent rigidity, flexibility and improved heat resistance and a method of manufacturing the same. The present invention provides a carbon fiber reinforced plastic material containing 2 parts by mass or more and 30 parts by mass or less of a nanofiller with respect to a total of 100 parts by mass of 30 parts by mass or more and 90 parts by mass or less of a polymer material and 70 parts by mass or more and 10 parts by mass or less of carbon fibers, an average aspect ratio (length/width) of the nanofiller being 20 or more. The average aspect ratio (length/width) of the nanofiller may also be 50 or more.

A silicon extrusion plant has a silicon extruder and a silicon feed device configured to load the silicon extruder. The silicon feed device has a feed hopper. The feed hopper opens into a feed opening arranged at the bottom thereof. The feed opening is in a fluidic connection, via a feed duct, with an inlet zone of the silicon extruder. A feed screw arranged in the feed hopper in such a way as to be drivable for rotation protrudes into the feed opening at least partly. The feed screw has a cone portion and a cylinder portion. According to another aspect, the silicon extrusion plant has at least one feed pressure sensor configured to measure an actual feed pressure of silicon material to be extruded. The pressure sensor is arranged in a transition region between the silicon feed device and the silicon extruder. A control unit is in a signal communication with the feed pressure sensor and a feed drive device in order to drive the silicon feed device. The control unit is used to define a nominal feed pressure and to transmit an actuating signal to the feed drive device depending on a difference detected between the nominal feed pressure and the actual feed pressure. As a result, a silicon extruder is obtained that is usable for the mass production of silicon extrudate.