The invention relates to a blown film system for producing a film tube made of plastics material, comprising: an annular nozzle, out of which a plastic melt having a closed cross-section can be brought; a take-up device, by means of which the plastic melt can be drawn up from the direction of the annular nozzle so as to form the film tube; an air-provision device, which is downstream of the annular nozzle when viewed in the transport direction of the film tube and by means of which an amount of air can be provided; and a calibration device, which is downstream of the annular nozzle when viewed in the transport direction of the film tube and surrounds the film tube and by means of which the outer circumference of the film tube can be delimited. At least one detector is contained that has a plurality of detection elements, by means of which electromagnetic radiation emitted or reflected at various points of the film tube can be detected, such that at least one planar region and/or contoured region of the film tube can be detected with regard to characteristic properties, wherein the detector comprises at least 32 detection elements.

A device for determining the temperature of a tubular strand conveyed out of an extrusion device includes at least one temperature sensor configured to measure a first temperature of an outside of the tubular strand at a first position of the tubular strand. An evaluation apparatus further included and configured to compare the first temperature with a second temperature of the outside of the tubular strand at a second position of the tubular strand and determine at least one of a temperature within the tubular strand or a temperature on the inside of the tubular strand at a position of the tubular strand based on the comparison of the first and second temperature.

An apparatus, a system, and a method for improvements in fused filament fabrication (FFF). Characteristics of a filament may be measured during production of the filament and the characteristics stored in a memory for retrieval by a 3D printer. The 3D printer adjusts print settings as necessary based on the measured characteristics, thereby resulting in better print quality.

A pressure chamber is provided for a blown film extrusion apparatus having (i) a die head for extruding a tubular polymer bubble, and (ii) a cooling assembly down-stream of the die head for receiving the bubble and applying a cooling fluid to the bubble. The pressure chamber includes an upstream end wall sealed around the die head outlet, and extending outward from the seal; a side wall movable between a closed position for controlling air flow from a chamber volume surrounding the bubble to the atmosphere, and an open position for permitting air flow from the chamber volume to the atmosphere. The upstream end wall has an inlet for receiving air from an air supply, and an outlet in fluid communication with the inlet and configured to direct the air into the chamber volume to pressurize the chamber volume when the side wall is in the closed position.

The present invention relates to the technical field of wire-rod production equipment, in particular relates to an automatic production line for conductive tape and a manufacturing method for conductive tape, Automatic production of conductive tape brings about high production efficiency and low cost; it not only conducts pretreatment and corresponding detections of the conductors in the production process but also conducts follow-up treatment and corresponding detections of the conductive tape and thus improves the production quality of the conductive tape; in addition, it marks the abnormality position of the conductive tape which is abnormal during the withstand voltage detection so that the operator can accurately find out the abnormal section of the conductive tape.

A plastic film of a thermoplastic synthetic resin is made in a film-making system by extrusion from a die of an extruder. First the plastic is melted and extruded from the die as a tube or web that is, typically after cooling and stretching, formed into a package. At least one reference parameter is provided, and, during continuous operation of the system, two input parameters different from the reference parameter are measured by respective measuring devices An output is determined from these reference parameters and is compared with the reference parameter.

The invention relates to a monitoring method for monitoring a film bubble (FB) in a discharge region (112) downstream of a discharge nozzle (110) of a blown film device (100), comprising the following steps: optically detecting at least one contour parameter (KP) of a film contour (FK) of the film bubble (FB) in the discharge region (112), comparing the at least one detected contour parameter (KP) with a specific preset value (VW), determining a contour deviation (KA) between the at least one detected contour parameter (KP) and the specific preset value (VW), outputting the contour deviation (KA) as monitoring result (UE).

The present invention relates to a filament for 3D printing, comprising (A) at least one semicrystalline polyamide, (B) at least one amorphous polyamide (C) at least one flame retardant of formula (I), wherein R.sup.1 and R.sup.2 are independently of each other a linear or branched C.sub.1-C.sub.8alkyl group, or an optionally substituted aryl group, M represents is an alkali metal ion, an alkaline earth metal ion, an aluminum ion, a zinc ion, an iron ion or a boron ion; m represents 1, 2 or 3; and n represents 1, 2 or 3, a process for the preparation of the filament and its use in a process for preparation of a three-dimensional object, by a fused filament fabrication process.

An apparatus, a system, and a method for improvements in fused filament fabrication (FFF). Characteristics of a filament may be measured during production of the filament and the characteristics stored in a memory for retrieval by a 3D printer. The 3D printer adjusts print settings as necessary based on the measured characteristics, thereby resulting in better print quality.

The claimed material relates to a silicate fiber and polymer composite having enhanced modulus, viscoelastic and rheological properties.