Device for forming by carding one or more fleeces of fibres, in particular non-woven

Abstract

Device for forming by carding one or more fleece(s) of fibres comprising a main carding drum ( 1 ) supplied with raw fibres, one or more doffer cylinder(s) ( 3 ) capable of removing the fibres worked on the carding drum and an associated stripper roller to strip the fleece(s) of fibres formed on the or each doffer and deposit them on one or more output belts, the device also comprising at least one comb-cleaner flywheel ( 4 ) capable of interacting with at least one doffer cylinder to remove dust and impurities therefrom, characterised in that it/they is/are fitted with prevention means ( 3, 4 ) which are configured so as to prevent the dust and impurities removed from the comb by the cleaner flywheel from escaping in the direction of the associated stripper roller.

1 . A device for forming one or more fleece(s) of fibres by carding comprising a main carding drum supplied with raw fibres, one or more doffer roller(s) to collect fibres worked on the carding drum and an associated stripper roller to strip the fleece(s) of the fibres formed on the one or each more doffer roller(s) and deposit them later on one or more output belts, the device also comprising at least one doffer cleaner flywheel working with at least one doffer roller to remove dust and impurities, wherein prevention means are arranged so as to prevent dust and impurities removed from the doffer by the cleaner flywheel from escaping in the direction of the associated stripper roller. 
     
     
         2 . The device of  claim 1 , wherein the prevention means are that the doffer cleaner flywheel is driven in a direction such that the impurities or dust collected at a doffer cleaner flywheel/doffer roller interface are sent from the said interface directly to the main carding drum. 
     
     
         3 . The device of  claim 1 , wherein the doffer roller rotates in the opposite direction to the carding drum and the doffer cleaner flywheel rotates in the same direction as the carding drum. 
     
     
         4 . The device of  claim 2 , wherein the prevention means form a screen arranged between the interface and the stripper roller. 
     
     
         5 . The device of  claim 1 , wherein a carding drum cleaner flywheel is arranged upstream of the doffer roller. 
     
     
         6 . The device of  claim 5 , further comprising at least one downstream airtight roller downstream of the drum cleaner flywheel, the at least one or two airtight roller and the carding drum cleaner flywheel rotating in the same direction. 
     
     
         7 . The device of  claim 6 , wherein the downstream airtight roller is arranged to brush the doffer cleaner flywheel. 
     
     
         8 . The device of  claim 5 , further comprising an intermediate roller arranged between the carding drum and the doffer roller, so that it fills the vacuum causing turbulence that entrains accumulations of fibres and dust likely to be the source of faults in the fleece formed. 
     
     
         9 . The device of  claim 8 , wherein the intermediate roller is located below the downstream airtight roller. 
     
     
         10 . The device of  claim 1 , comprising two doffer rollers, upper and lower respectively, two respective upper and lower doffer cleaner flywheels, two respective upper and lower stripper rollers and an additional drum cleaner flywheel arranged upstream of the upper doffer roller and at least one downstream upper airtight roller downstream of the drum cleaner flywheel. 
     
     
         11 . The device of  claim 10 , wherein the upper doffer flywheel cleaner rotates in the opposite direction to the upper doffer roller and the lower doffer cleaner flywheel rotates in the opposite direction to the lower doffer roller. 
     
     
         12 . The device of  claim 10 , comprising an intermediate roller arranged between the main carding drum and the upper doffer roller, below the upper doffer cleaner flywheel and below the upper downstream airtight roller. 
     
     
         13 . The device of  claim 10 , comprising a lower airtight roller arranged between the lower doffer cleaner flywheel and the main carding drum, the lower airtight roller being used to brush the lower doffer cleaner flywheel. 
     
     
         14 . The device of  claim 4 , wherein the screen is in the form of an enclosure essentially surrounding the doffer cleaner wheel. 
     
     
         15 . The device of  claim 6 , which comprises two airtight rollers, downstream and upstream, respectively of the drum cleaner flywheel. 
     
     
         16 . The device of  claim 15 , wherein the one or the airtight rollers rotates in opposite direction to the carding drum. 
     
     
         17 . The device of  claim 8 , wherein the intermediate roller is arranged below the downstream airtight roller. 
     
     
         18 . The device of  claim 10 , which comprises two upper airtight rollers, downstream and upstream respectively of the drum cleaner flywheel. 
     
     
         19 . The device of  claim 11 , which comprises two doffer rollers which rotate in the same direction. 
     
     
         20 . The device of  claim 13 , wherein the lower airtight roller rotates in the opposite direction to the lower doffer cleaner flywheel.