Zimmer Aktiengesellschaft

Oerlikon Textile Gmbh & Co Kg

Rainer Tietze

Heinz-Dieter Beeck

Thomas Gries

Werner Mrose

Guenter Koschinek

Heinz D Schroeder

Andreas Weichel

Richard Prehler

Roland Estelmann

A method and apparatus for the steam misting of rectangular nozzles and spinning systems equipped therewith for producing polyamide filaments whereby the steam feed is conducted through a tube loop which is passed through the heating chamber of the spinning beam so that the steam is brought to the spinning temperature. Directly below the spinning beam and thus on the lower edge of the rectangular nozzle stack which is connected thereto, between the spinning beam and the after-heater, steam outlet bars are longitudinally applied. These steam outlet bars are equipped with a simple labyrinth for pressure equalization. The steam inlet is effected initially in each case centrally of the rectangular nozzle stack and transitions into an upwardly open and relatively broad distribution chamber along the rectangular nozzle stack. This vertical distribution chamber transitions into a horizontal and very small gap which is open into the spinning chamber at its mouth. The steam then travels in the direction of the nozzles transversely to the filament curtain. The ends of the rectangular nozzle stack need not be misted with steam.

Application of a vaporous mist for spining systems with rectangular nozzles

The invention relates to a spinning device in which liquid polymer is guided through a polymer line with a first heating jacket to a spinning pump with a second heating jacket. From said spinning pump, the polymer is transported through several lines to spinning packets and extruded through spinnerts to form filaments. The lines that are connected downstream of the spinning pump, the spinning packets and the spinnerets are located in at least one spinning housing through which heating fluid flows. There is a distance of 5 mm between the spinning housing through which the heating fluid flows and the first and second heating jackets and the spinning pump, to obtain thermal decoupling. According to a method for heating the spinning device, vaporous heating fluid is guided out of a first reservoir into the spinning housing, and heating fluid is guided out of a second reservoir into the first and/or second heating jacket. The temperature of the heating fluid that is supplied to the spinning housing is 10 to 40&deg; C. higher than the temperature of the heating fluid that is supplied to the first and/or second heating jacket.

Spinning device for spinning molten polymers and method for heating the spinning device

The invention relates to a spinneret for spinning thermoplastics. Said spinneret comprises a central polymer inlet channel, a filter assembly ( ), consisting of one or more filter plates of various filtration grades, a spinneret plate ( ) and a housing ( ) which receives and tightly surrounds the filter assembly ( ) and the spinneret plate ( ). The selection of suitable materials and tolerances for the individual parts of the spinneret enables the sealing effect to be achieved at operating temperature by the increased expansion of the internal components, in relation to the external housing.

Self-sealing compact spinneret for a melt spinning process

A spinning block for the melt spinning of polymers, consisting of a melt channel, a coupling which is attached to the spinning bar and a nozzle block casing with a filter element and a spinning nozzle plate. A connector for detachably securing said nozzle block casing to the coupling consists of at least two bolts which are positioned symmetrically and perpendicularly to the axis of spinning, which bolts engage cooperating grooves, of a particular configuration, also positioned symmetrically and concentrically to the spinning axis. The bolts can be fixed to the casing or to the coupling. The grooves are provided in the coupling or the casing to complement the location of the bolts. By rotation of the nozzle block casing with respect to the coupling around the spinning axis, the parts are locked together. Simultaneously, as the bolts slide in the grooves, the melt channel is sealed at the connecting surfaces between the coupling and the nozzle block casing, by means of bushing seals which are expanded, in a pressure-tight manner as the casing and coupling are drawn together.

Growing community of inventors

Nauheim, Germany

Rainer Tietze