RECYCLING FACILITY FOR NON-WOVENS

Abstract

Recycling facility for non-wovens, comprising a fraying roller (8), a flat carding machine (9) without spikes mounted downstream of the fraying device (8) in the direction of travel of the non-wovens in the facility.

Claims

1. Recycling facility for non-wovens, comprising a fraying device, characterised by a flat carding machine without spikes mounted downstream of the fraying device in the direction of travel of the non-wovens in the facility.

2. Manufacturing facility for non-wovens, comprising: from upstream to downstream successively, a device for opening and mixing fibres, a principal carding machine of a type other than a flat carding machine, a device for consolidation by water jets, a drier, a rewinder and a facility for recycling non-wovens, comprising a fraying device, a flat carding machine without spikes mounted downstream of the fraying device in the direction of travel of the non-wovens in the facility and a device for sending fibres leaving the flat carding machine to the device for opening and mixing fibres.

3. Facility according to claim 2, comprising a sizing device mounted upstream of the fraying device.

4. Facility according to claim 1, characterised in that the fraying device has a fraying roller fitted with conical or cylindro-conical spikes.

5. Facility according to claim 4, characterised in that the spikes have a height of 5 to 25 mm, preferably 10 to 20 mm.

6. Facility according to claim 4, characterised in that the spikes have a base diameter of 2 to 8 mm, preferably 2 to 3 mm.

7. Facility according to claim 4, characterised in that the spikes are inclined in the direction of rotation of the fraying roller of the fraying device at an angle of 20 to 50 to the perpendicular to the exterior lateral surface of the fraying roller.

8. Facility according to claim 2, characterised by a cutting device downstream of the rewinder, the non-woven cutting waste from the cutting device being sent to the fraying device.

9. Facility according to claim 8, characterised in that the non-woven cutting waste is sent to the fraying device passing first through a sizing device.

10. Facility according to claim 1, comprising a sizing device mounted upstream of the fraying device.

Description

[0016] In the attached drawings, given purely as examples:

[0017] FIG. 1 is a flow diagram of a recycling facility according to the invention and of the associated non-wovens production line;

[0018] FIG. 2 is an elevation view of a fraying roller with spikes;

[0019] FIG. 3 shows part of the roller fitted with metal spikes;

[0020] FIG. 4 is a cross-sectional view of a metal spike on the fraying device;

[0021] FIG. 5 is a cross-sectional view of a flat carding machine.

[0022] The non-wovens production line shown in FIG. 1 includes a device 1 for opening and mixing fibres that sends the opened and mixed fibres to a carding machine 2 of a type other than a flat carding machine, in particular to a carding machine with spikes. The carded web leaving carding machine 2 is consolidated in a device 3 for consolidation by water jets into a wet web which is sent to a drier 4. The dried web goes to a rewinder 5, if applicable, before being unwound, then cut and rewound at 6.

[0023] The lint from the rewinder 5 and the cutting device 6 is sent to a sizing device 7, then to a spiked fraying roller 8, the frayed fibres leaving the fraying device 8 are carded in a flat carding machine 9. After intermediate storage 10 the carded web may be sent to the opening and mixing device 1.

[0024] The fraying device is shown in elevation in FIG. 2. It consists of a feed roller 11 that advances the consolidated non-woven web continuously on a table 12. A rotating roller 13 fitted with metal spikes 14 shreds and frays the non-woven web when it passes over the lip of the table 12 in the space between the table 12 and the rotating roller 13. The rotating roller 13 of the fraying device is fitted with spikes (FIG. 3). A spike is shown in FIG. 4. It has a height h of 15 mm and a base diameter of 3.5 mm and is made from steel, preferably stainless steel. The distance between centres of the spikes is 10 mm.

[0025] A flat carding machine is shown in elevation in FIG. 5. It consists mainly of a rotating drum 15. Part of the drum is enclosed by caps 16 connected in an endless chain 17. The fibres are spiked between the caps 16 and the drum 15, while the caps move slowly in the direction opposite to the movement of the fibres over the drum 15. A device 18 is provided for cleaning the caps 16 on their return passage to the drum 15. A doffing roller 19 detaches the carded fibres from the drum 15.