Spinning head and filter device for said type of spinning head

Abstract

The invention relates to a spinning head which is used to melt spin a plurality of synthetic filaments, and to a filter device for said type of spinning head. A filter device is arranged between an inlet plate comprising a melt inlet and a die base comprising several die holes, said filter device comprising a cylindrically-shaped filter ring element which can be cross-flown from the outside to the inside. A separate second filter ring element is associated with the first filter ring element in order to form a sufficient filter surface with large melt through-put rates, said second ring element being arranged at a distance in relation to the outer lying first filter ring element. A first partial flow of the melt is guided through the first filter ring element from the outside to the inside and a second partial flow of the melt is guided through the second filter ring element from the inside to the outside in order to combine them together in a release chamber formed between the filter ring elements.

Description

technical field [0001] The invention relates to a spinneret for melt spinning a plurality of synthetic filaments according to the preamble of claim 1 and to a filter device for a spinneret according to the preamble of claim 12 . Background technique [0002] A spinning head of this type as well as a filter device of this type are known from EP 1 093 535 B1. [0003] When extruding a polymeric melt, the melt is filtered inside the spinneret before passing through a plurality of spinneret holes of a spinneret, for which known spinnerets have a filter device, which consists of a cylindrical filter ring elements. The filter ring element is formed by a support tube and a filter sleeve surrounding the support tube, the support tube and filter sleeve being combined at the support end to form a sealing edge. The filter ring element is fixed in a self-sealing manner within the spinneret by a distribution element, wherein the melt flow is distributed along the circumference of the f...

AI Technical Summary

Problems solved by technology

[0006] In the known solutions using shaped filter elements there is also the problem that, due to the shape of the filter element, the flow-through characteristics over the entire surface of the filter element are Different, resulting in preferred flow areas, which lead to uneven utilization of the filter material

At the same time a uniform melt flow cannot be established inside the spinning head

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