US 11,377,760 B2 · High productivity and flexibility plant of the spun bonding type for the production of a non-woven web

Abstract

An innovative plant (10) for the production with the “spun bonding” technology or similar of a web (V) of non-woven fabric, comprising: a melting station (11) suitable for receiving and melting a polymeric base material (MR), an extrusion bar or head (12) with a plurality of extrusion or drawing nozzles (12a) adapted to receive from the melting station (11) the polymeric material (MR) in the molten state to produce a plurality or bundle of continuous filaments (FF); a conveyor belt (13) adapted to advance along a direction of advancement (A) and to receive from the above the continuous filaments (F), produced by the extrusion nozzles (12a), so as to form a web (V) of non-woven fabric; and consolidation means (14) designed to consolidate the non-woven web (V) formed on the conveyor belt (13); wherein the plant (10) is characterized by a special structure (20) comprising a base platform (21), rotatable (f, f′, f″) around a respective vertical rotation axis (X), and wherein the melting station (11), suitable for receiving and melting the base polymeric material (MR), and the extrusion bar (12), suitable for receiving from the melting station (11) the polymeric material (MR) in the molten state, are totally built and solidly supported by this rotatable base platform (21) (f, f, f), so as to be rigidly connected to each other without the interposition of any rotating joint. Advantageously, the plant (10) allows to vary, without interrupting its operation, the width (L, L′, L″) of the non-woven web (V) produced by the same plant, by rotating (f, f′, f″) and adjusting the base platform (21) around the respective vertical rotation axis (X), so as to vary the inclination (a) of the extrusion bar (12) with respect to the direction of advancement (A) the conveyor belt (13).

Claims9

Dependent claims

A plant for the production of a web of a non-woven, comprising:

at least one melting station adapted to receive and melt a basic polymeric material;
an extrusion bar, in turn comprising a plurality of extrusion or drawing nozzles adapted to receive from the melting station the polymeric material in the molten state to produce a plurality of continuous filaments;
a conveyor belt adapted to advance along an advancing direction and to receive from the above said continuous filaments, produced by said extrusion nozzles, so as to form a web of a non-woven and continuously evacuate it from the plant;
and
consolidation means for consolidating the web of non-woven formed on the conveyor belt;
wherein said extrusion bar is variably inclinable with respect to the advancing direction of the conveyor belt;
wherein the plant further comprises a special structure comprising a rotatable base platform adapted to rotate about a respective axis of rotation with respect to a fixed part or structure of the same plant, and
wherein said melting station, adapted to receive and melt the basic polymeric material, and said extrusion bar, in turn comprising said plurality of extrusion or drawing nozzles to receive from the melting station the polymeric material in the molten state, are totally constructed and supported integrally by said rotatable base platform, so as to be rigidly connected to each other without the interposition of any rotary joint,
whereby the plant allows to vary the width of the non-woven web produced by the same plant, by rotating and adjusting said base platform around the respective axis of rotation, so as to vary the inclination of said extrusion bar with respect to the advancing direction of the conveyor belt.

6 more elements

Dependencies are inferred from the claim text.

High productivity and flexibility plant of the spun bonding type for the production of a non-woven web

Life of this patent

High productivity and flexibility plant of the spun bonding type for the production of a non-woven web

Life of this patent

Abstract

Claims9