Reifenhaeuser Gmbh & Co Kg Maschinenfabrik

Reifenhauser Gmbh & Co Kg Maschinenfabrik

Reifenhaeuser Gmbh & Co. Kg Maschinenfabrick

Reifenhäuser Gmbh & Co. Maschinenfabrik

Michael Nitschke

Detlef Frey

Martin Neuenhofer

Hans-Georg Geus

Christine Noack

Claudio Cinquemani

Thomas Fett

Nicolas Quick

Martin Swiatek

Armin Tobay

Sebastian Sommer

Christoph Lettowsky

Jens Mager

Christian Stelter

Mark Hilgers

Alexander Klein

Felix Goretzki

Michael Maas

Walter Kühn

Paul Walach

Andreas B Rösner

Hans-Juergen Hofemeister

Asmir Vodencarevic

Hartmut Kopp

Hans Jürgen Hofemeister

Tristan Tiedt

Walter Kuehn

Heiner Schulze-Uphoff

Tristan Kretschmann

Detlev Frey

Hans-Jürgen Hofemeister

A spunbonded nonwovens is made by first spinning thermoplastic continuous filaments and emitting them from a spinneret in a direction and then passing the filaments in the direction through a cooling chamber. Meanwhile cooling air is fed from respective manifolds flanking the chamber into the chamber to cool the filaments and the cooling air is guided into the manifolds through respective manifolds and through respective planar homogenizing elements each having a plurality of openings forming a free open surface area constituting 1 to 40% of the total surface area of the respective planar homogenizing element. The cooling air passes from the planar homogenizing element into the cooling chamber through a flow straightener.

Manufacture of spunbonded nonwoven from continuous filaments

The invention relates to various aspects in the production of extrusion products. The properties of extruded articles are dependent significantly, in addition to their formulation, also on the setting variables and in particular on the thus resulting process variables. The setting variables and in particular the process variables thus represent a state of the extrusion process characterized as 'fingerprint'. The thus claimed invention takes into account these facts and supports the operator of a production plant to detect earlier changes in quality and to systematically counteract a deterioration in the quality.

Method for monitoring a production process, method for indirectly deducing a systematic dependency, method for adapting quality, method for starting a production process, method for producing an extrusion product and system for producing an extrusion product

Manufacture of spunbonded nonwovens from continuous filaments

A nonwoven web is made by first depositing fibers as a nonwoven web in a deposition area, then conveying the web away from the deposition area in a web-travel direction, preconsolidating the web in the path, and passing the preconsolidated web between a pair of rollers that compress and final consolidate the preconsolidated web, One of the rollers is separated from the web such that final consolidation of the web at a starting level is stopped and at the same time or immediately beforehand upstream preconsolidation of the web increased. After separating the one roller from the web, another roller is engaged with the web at the consolidation station and then final consolidation is recommenced, whereupon upstream preconsolidation of the web is reduced back to the starting level.

Nonwoven web and method of making same

Spunbonded nonwoven is made from continuous thermoplastic filaments emitted downwardly by a spinneret in a filament direction. A cooling chamber directly beneath the spinneret receives the filaments from the spinneret and cools the spun filaments with cooling air and has relative to a longitudinally extending machine direction a pair of longitudinal sides extending parallel to the machine direction and a pair of transverse sides extending substantially perpendicular to the machine direction between the longitudinal sides. Respective air-supply manifolds on the transverse sides feed cooling air therefrom into the cooling chamber. The cooling air is extracted from the cooling chamber at the longitudinal sides. A stretcher directly beneath the cooling chamber receives and elongates the cooled filaments, and a device deposits the stretched filaments as a band and conveys the band off in the machine direction.

Making spunbond from continuous filaments

An apparatus for making spunbonded nonwovens has a spinneret for emitting continuous thermoplastic filaments in a filament-travel direction, a cooling chamber downstream in the direction from the spinneret for cooling the spun filaments with cooling air, two manifolds on opposite sides of the cooling chamber opening transversely of the direction into the cooling chamber, and a respective conduit having a conduit cross-sectional area and connected to each manifold for feeding cooling air thereto. The conduit cross-sectional area increases toward the manifold to a manifold cross-sectional area, and manifold cross-sectional area is at least twice as large as the conduit cross-sectional area. At least one flow straightener is provided upstream from the cooling chamber in each manifold for orienting air flow in an air-flow direction, and at least one perforated planar homogenizing element is provided in each manifold for homogenizing the cooling air flow.

Manufacture of spun-bonded nonwoven from continuous filaments

An apparatus for making spunbonded nonwoven from continuous thermoplastic filaments has a spinneret for downwardly emitting the continuous filaments in a filament direction, a cooling chamber directly beneath the spinneret for receiving the filaments from the spinneret and cooling the spun filaments with cooling air and having relative to a longitudinally extending machine direction a pair of longitudinal sides extending parallel to the machine direction and a pair of transverse sides extending substantially perpendicular to the machine direction between the longitudinal sides. Respective air-supply manifolds on the transverse sides feed cooling air therefrom into the cooling chamber. The cooling air is extracted from the cooling chamber at the longitudinal sides. A stretcher directly beneath the cooling chamber receives and elongates the cooled filaments, and a device deposits the stretched filaments as a band and conveys the band off in the machine direction.

Manufacture of spunbond from continuous filaments

An apparatus for making spunbonded nonwoven has a spinneret for emitting the continuous filaments in a filament-travel direction, a cooling chamber downstream in the direction from the spinneret and receiving the filaments, and two air-supply manifolds flanking the chamber for feeding cooling air thereinto transverse to the direction. A flow straightener for equalizing flow of the cooling air on the filaments is provided in at least one of the air-supply manifolds and has passage walls forming a plurality of flow passages that extend transversely to a filament-travel direction. A flow cross section of the flow straightener is greater than 85% (preferably more than 90%) of a cross-sectional size of the straightener, a ratio of a length L of the flow passages to an inner diameter Dof the flow passages L/Dis 1 to 15.

Apparatus for making spunbonded nonwoven from continuous filaments

A semifinished product for making a composite fiber molded part is made by first spinning from a row of orifices of a spinning nozzle low-melting fibers of a thermoplastic. These low-melting fibers are then combined into a laminated semifinished product with high-melting reinforcement fibers of the same thermoplastic but having a melting temperature higher than the melting temperature of the low-melting fibers.

Method of making a semifinished product

An apparatus for making a spunbond nonwoven from endless filaments of a thermoplastic synthetic resin has a spinneret for spinning the filaments in a filament-travel direction into a spinning zone and a monomer aspirator downstream of the spinneret and having two vacuum intake ports flanking the spinning zone zone, horizontally confronting each other, and each extending transversely to the direction opposite one another. Suction means connected to the two ports withdraws gas through both the vacuum intake ports. The suction and/or the ports are set up to vary the flow through the vacuum intake ports such that substantially more gas flows through one of the ports than through the other.

Method and apparatus for making a spunbond nonwoven from endless filaments

The invention relates to a method for producing a semi-finished product for producing a composite molded part (), in particular a composite fiber molded part, wherein a higher-melting reinforcement material (), in particular higher-melting reinforcement fibers are combined with lower-melting fibers () made of thermoplastic into a laminate (), wherein the lower-melting fibers are spun and after spinning are combined at a fiber temperature Twith the higher-melting reinforcement material, in particular with higher-melting reinforcement fibers, into the laminate forming the semi-finished product. The fiber temperature Tlies in a temperature range between a temperature of 25&#xb0; C. below the heat distortion temperature Tto 55&#xb0; C. above the heat distortion temperature Tof the thermoplastic of the lower-melting fibers.

Semifinished product for making molded composite part and method of making same

An apparatus for making a spunbond nonwoven from monofilaments of thermoplastic synthetics has a spinneret for spinning and emitting the filaments in a travel direction, a cooler downstream of the spinneret for cooling the spun filaments, and a stretcher downstream of the cooler for stretching the filaments. An intermediate passage extending in the travel direction between the cooler and the stretcher has upstream and downstream converging passage sections. The upstream passage section in the travel direction of the filaments having a shorter length than the downstream passage section in the travel direction of the filaments. A ratio B/Bof an inlet width Bto an outlet width Bof the upstream passage section is 1.5 to 5.5. A ratio of an inlet width b, to an outlet width b, of the downstream passage section is 1 to 4.

Apparatus for making a spunbond nonwoven

A nonwoven web made of plastic fibers and having a web thickness less than 2 mm (preferably less than 1.5 mm) and a grammage less than 30 g/m(preferably less than 25 g/m) and conveyed this web in a travel direction so that it physically contacts a guide or treatment roller. A stabilization plate extending in and transversely to the travel direction of the nonwoven web is provided upstream or downstream of the roller in the travel direction, and the nonwoven web is guided in the travel direction past the stabilization plate such that a spacing between a face of the stabilization plate turned toward the nonwoven web and the nonwoven web face is 0 to 20 mm (preferably 0.1 to 10 mm, and very preferably 0.2 to 5 mm).

Method and apparatus for guiding a nonwoven web

An apparatus for wetting a material web with a liquid in which the material web is guided in a travel direction through the apparatus, which includes guide means for guiding the material web and application means for applying the liquid to the material web. On the side of the material web oriented away from the application means, a spray guard is provided, which rests directly against the material web.

Apparatus for wetting a web of material with a liquid

An apparatus for applying a treatment liquid to a web moving in a predetermined web-travel direction has an applicator element having a surface extending transverse to the direction and positioned to contact the moving web. The liquid is applied to the surface such that the liquid is transferred to the moving web where the moving web contacts the surface. A shield directly engages a portion of the surface between the web and the surface so that where the shield extends between the moving web and the surface there is generally no transfer of the liquid from the surface to the moving web. Formations on the shield conduct the liquid away from edges of the shield.

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Koenigswinter, Germany

Michael Nitschke