Spinning device and method for spinning synthetic thread

Abstract

A melt spinning apparatus for spinning a synthetic yarn, wherein the yarn is formed by combining a plurality of filaments and wound to a package by means of a takeup device downstream of the spinning apparatus. Downstream of the spinneret, an inlet cylinder with a gas-permeable wall and a cooling tube are arranged. The cooling tube connects to a suction device such that an air stream forms in the cooling tube in the direction of the advancing yarn. This air stream assists the advance of the filaments and leads to a delayed cooling. To ensure adequate cooling of the filaments within the cooling zone, an air supply device is provided for generating an additional cooling air stream which flows in the axial direction of the cooling tube for cooling the filaments downstream of the inlet to the cooling tube.

Description

technical field

[0001] The invention relates to a spinning device for spinning synthetic filaments and to a method for spinning synthetic filaments. Background technique

[0002] Such a spinning device and method are known from EP0682720.

[0003] In known spinning devices the freshly extruded monofilaments travel in a cooling tube with a negative pressure atmosphere. The cooling tube is placed at a distance from the spinneret such that an air flow for cooling the monofilaments is formed in the cooling tube in the direction of travel of the filaments. The air flow speed and the spinning speed are matched to one another in such a way that the monofilaments are supported by the air flow during their forward movement in the cooling tube. This achieves that the hardening point of the monofilaments is kept away from the spinneret. This consequently delays the crystallization of the polymer, which has a favorable effect on the physical properties of the filament. In this way, ...

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