A device and a method for calibrating a blown film are provided, said device comprising: a tubular region with at least one inner wall, through which region the blown film can be passed; a liquid reservoir, which can be used to provide a liquid and which is situated above the tubular region, the liquid being guidable between the inner wall and the blown film; and a suctioning device, situated below the tubular region, for suctioning off at least part of the liquid from the blown film. At least one liquid-permeable element is provided, said element surrounding at least parts of the periphery of the blown film. This device permits the distance of the liquid-permeable element from the main axis of the blown film to be altered.

Method and apparatus for pulling polymeric material from an extrusion die as a tubular extrusion uses a pair of mutually-facing endless belts for pulling the extrusion from the extrusion die by frictional contact with the extrusion, the belts being spaced apart from one another for frictional driving passage of the tubular extrusion therebetween, spacing of the belts being continuously adjusted in response to signal from a gauge continuously measuring outer diameter of the tubular extrusion upstream of the belts.

A system for executing a rod member extrusion-molding method of the present invention has an extrusion-molding machine of a rod member, a transfer conveyor, a delivery line of the rod member between the extrusion-molding machine and the transfer conveyor, a measurement position defined on the delivery line and dividing the delivery line into an upstream section and a downstream section, a measurement device measuring an outer diameter of the rod member in the measurement position, a first roller conveyor forming a part of the section at least directly upstream of the measurement position, a second roller conveyor forming the downstream section, and a control device performing feedback control of a transfer speed of the transfer conveyor based on the outer diameter obtained in the measurement device.

An apparatus includes an upper lip positioned with respect to an air flow passage. The upper lip is to direct air flow from the air flow passage around a bubble of blown film. The apparatus further includes a Venturi ring movably mounted with respect to the upper lip and adjustable in position with respect to the upper lip. The Venturi ring is to adjustably lock the bubble of blown film.

Subject matter of the present invention is a method of applying coating layers (9) to a substrate (1, 11, 21, 31), wherein the substrate (1, 11, 21, 31) is drawn through a coating chamber (2) containing a pressurized coating agent (3) being liquefied or softened by means of a thermal exposure, wherein the substrate (1, 11, 21, 31) is drawn through a drawing tool (8), wherein the coating agent (3) serves as a lubricant between the drawing tool (8) and a surface of the substrate (8) and wherein at the same time the coating layer (9) is applied to the surface of the substrate (8). Subject matter of the invention is also a corresponding apparatus for applying a coating layer (9) to a substrate (1, 11, 21, 31). By means of the invention coating layers can be applied to a substrate in an efficient and economical way.

An extrusion device includes a cylinder, a raw material feed port, a screw incorporated in cylinder, a die disposed at one end of the cylinder, and adjustment mechanisms. Raw material feed port supplies raw materials including resin into cylinder. Screw is able to melt the raw materials through kneading. Die includes a plurality of through-holes for ejecting strands made of molten resin supplied from cylinder. Adjustment mechanisms individually adjust ejection amounts of the strands ejected from the plurality of through-holes.

A device that recycles thermoplastics for producing a filament for fused deposition modelling devices (FDM) and respective operating method is provided. The crushed thermoplastic is introduced into the hopper, pushed by a screw, driven by the motor, inside the barrel, whose axial force is sustained by the axial bearing. The thermoplastic is melted with the assistance of electrical heating resistors and passes through a degassing zone connected to the vacuum pump. The thermoplastic is forced through the die, being cooled on a cooling tray having a water circulation system. The diameter of the filament is controlled by the puller based on the data obtained in the measurement system of the filament diameter. A microcontroller controls the entire process.

The invention relates to an annular die on an extrusion head for producing tubular or sheet-like preforms with an arcuate die gap and with a melt channel delimited by a mandrel and a die body, the cross-sectional profile of the melt channel being variable by way of adjusting elements, the annular die according to the invention being distinguished by the fact that the outer circumference of the melt channel is at least partially delimited directly by at least one radially adjustable slide, that the slide is formed by a number of segments that can be adjusted together from at least one first position into at least one second position, and that the segments in each position form a respectively closed arc portion of the delimitation of the melt channel, the radius of the arc portion being different according to the position of the segments.

An improved control apparatus for producing plastic films and an associated improved method are distinguished, inter alia, by the following features: the control apparatus has two stages or at least two stages, the control apparatus comprises, for this purpose, a sensor module and/or a sensor model and a process module and/or a process model, the machine-dependent sensor module and/or sensor model and the production-dependent process module and/or process model are linked or can be linked to one another via production variables, adjustable machine variables are connected or linked to plant production variables via the sensor module and/or the sensor model.

The invention relates to a device and a method for calibrating a blown film (6), said device comprising: a tubular region with at least one inner wall (55), through which region the blown film can be passed; a liquid reservoir (82), which can be used to provide a liquid and which is situated above the tubular region, the liquid being guidable between the inner wall (55) and the blown film; and a suctioning device (B), situated below the tubular region, for suctioning off at least part of the liquid from the blown film. At least one liquid-permeable element (92) is provided, said element surrounding at least parts of the periphery of the blown film (6). This device permits the distance of the liquid-permeable element from the main axis of the blown film to be altered.