Zimmer Aktiengesellschaft

Heinz D Schroeder

Guenter Koschinek

Rainer Tietze

Spinning head for spinning polymer melts, having a filter cartridge made of a seamless metal cloth cylinder having an end cap and a connector, said cartridge being disposed within a melt passage having a conical taper toward the bottom. The connector is inserted into the melt channel and has a matching conical shape to seal against the channel wall. A die plate having a maximum area of 90 cm.sup.2 connects to the connector. An opening through the connector permits filtered polymer melt to flow from the filter cartridge through the connector to the die plate. A single filter cartridge is provided for each die plate, whereby the ratio of filter area to die plate area is at least 0.5:1.

Spinning head with filter cartridge

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.

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Frankfurt am Main, Germany

Heinz D Schroeder