In at least one embodiment, a molding method for producing a molded article is provided. The method may include introducing polymer and fiber separately into an extruder in a first ratio to produce a first extruded material having a first fiber content and in a second ratio to produce a second extruded material having a second fiber content different from the first fiber content. The method may further include filling a first region of a mold with the first extruded material and a second region of the mold with the second extruded material. The extruded material may be formed as blanks for use in compression molding or may be introduced into an injection chamber for use in injection molding. The method may be used to form molded articles having a plurality of regions having different fiber contents.

An installation for producing a polymer melt for a porous film, in particular for a membrane film, comprises a planetary roller extruder. Said extruder is used to produce a flowable polymer melt from thermoplastics. The planetary roller extruder has a filling opening and a discharge side for delivering the polymer melt. A melt pump is further provided. The discharge side of the planetary roller extruder is connected to a downstream inlet side of the melt pump for further conveying the polymer melt. The connection is in the form of a pressure channel shielded from the ambient atmosphere or a pressure line shielded from the ambient atmosphere. The planetary roller extruder and the melt pump are designed and/or can be driven in such a manner that the polymer melt is applied or can be transferred under pressure at the melt pump on the inlet side.

A process for continuously preparing a polyolefin composition made from or containing a polyolefin and carbon black in an extruder device. The process includes the steps of supplying polyolefin in form of a polyolefin powder and carbon black to a mixing device; alternatively, (a) measuring the flow rate of the polyolefin powder supplied to the mixing device or (b) measuring the flow rate of the polyolefin pellets prepared in the extruder device; adjusting the flow rate of the carbon black to the mixing device in response to the measured flow rate of the polyolefin powder or adjusting the flow rate of the polyolefin powder to the mixing device in response to the measured flow rate of the polyolefin pellets; melting and homogenizing the mixture within the extruder device; and pelletizing the polyolefin composition into the polyolefin pellets.

A method and system for optimizing a match between the color of an in-line part manufactured by a plastic product production machine and the color of a reference part by adjusting the concentration of masterbatch in the mixture of raw material fed to the plastic product production machine. The optimization of the color is based on spectra of the in-line part and reference part obtained within a short time interval using the same spectrometer, thereby eliminating the requirement for high accuracy spectrometer calibration and allowing the method, which determines the rates at which the base masterbatches are added to the raw material, to be carried out in real time on the manufacturing floor while the plastic product production machine is being operated to manufacture in-line parts.

The present invention relates to a process for the production of panels for floor or wall coverings comprising the steps of mixing and homogenising raw materials, thereby obtaining a dryblend, extruding said dryblend, thereby obtaining one or more thermoplastic layers, laminating the afore-mentioned thermoplastic layers, thereby obtaining a panel for floor or wall coverings, wherein said raw materials and/or said dryblend are predominantly transported vertically downwards during the weighing, mixing and/or homogenising of said raw materials and during the feeding of said dryblend to extruders via feeding units,

A method of making a die body configured to extrude a honeycomb body, the method comprising the step (I) of manufacturing a die body and the step (II) of predetermining an upstream slot width W1 of the die body such that the upstream slot width W1 is optimized while a root of each die pin includes a section modulus within a predetermined section modulus range. The method still further comprises the step (III) of predetermining a slot length L such that a pin stress is within a predetermined pin stress range.

A method of fabricating an injection-molded component is provided. The method includes the step of introducing pellets into an injection barrel of an injection molding machine. The pellets include a first supercritical fluid. The pellets are plasticized in the injection barrel and a second supercritical fluid is injected into the plasticized pellets. The second supercritical fluid and the plasticized pellets are mixed to form a mixed material. The mixed material is injected into a mold.

The invention relates to a process for producing an extruded sulfur-crosslinkable rubber mixture, comprising the following process steps: A) producing a sulfur-crosslinkable rubber mixture by means of a mixer or providing a sulfur-crosslinkable rubber mixture, where the temperature of the sulfur-crosslinkable rubber mixture is less than 35 C., B) contactlessly adjusting the temperature of the sulfur-crosslinkable rubber mixture produced or provided in step A) to at least 40 C. in a temperature adjustment unit, C) measuring the temperature of the rubber mixture in the temperature adjustment unit and D) feeding the sulfur-crosslinkable rubber mixture that has been measured in step C) into an extrusion unit at a temperature of 35 C. or more and extruding the fed rubber mixture in the extrusion unit. The invention further relates to an apparatus for performing the process and to the use of the apparatus.

Granulation method and device for crosslinked polyethylene cable insulating material having voltage grade of at least 500 kV are provided. The method includes: controlling melt extrusion system to melt insulating material; directing the melt into melt gear pump through first branch flow channel; measuring pressures at inlet and outlet of the melt gear pump, and calculates first pressure difference p.sub.1; rotational speed of melt gear pump is adjusted such that p.sub.1 approximates to 0; measuring pressures at inlet and outlet of capillary mold, and calculate second pressure difference p.sub.2; volume flow rate Q of the melt flowing into capillary mold is obtained based on number of steps of rotation of melt gear pump; shear rate, shear stress and shear viscosity of the melt are obtained based on Q and p.sub.2; and adjusting process parameters, adjusting to obtain adjusted , and causing to be within processing-suitable viscosity range.

The invention describes a method for producing a plastics film by a film-extruding machine, wherein at least two plastics materials from at least two reservoirs are fed together to one extruder or are each fed to a respective extruder, the plastics materials are melted in the extruder or in the extruders and are conveyed as a melt strand or as melt strands into a die head, the melt Strand or the melt strands are spread out flat in the die head and is/are extruded from a die of the die head as a melt film, and the melt film and/or the film sheet formed by cooling is/are drawn off by at least one take-off roll. It should particularly be noted that measured values are recorded by means of a measuring device for at least one property of at least one plastics material and/or at least one melt strand /d/ or the melt film and/or the film sheet and/or for a machine parameter of the film-extruding machine and that a first plastics material is a plastics material with varying material properties and a second plastics material is a plastics material with substantially constant material properties, wherein the first and the second plastics materials are fed to the extruder or the extruders in relative proportions, the relative proportions being varied according to the measured values for the property.