Monitoring process for nonwoven fabrication plants

Abstract

A monitoring process is provided for a method for producing a nonwoven fabric (7) made of fibers (1, 2) in a nonwoven fabrication plant (15). Humidity and/or the electric charge of the fibers (1, 2) or a nonwoven pre-product (3) is detected by a detection unit (41) in a detection zone (5) and the detection results are processed in a data processing unit (42). An actuation command (45) is generated for at least one actuation unit (50) of the nonwoven fabrication plant (15). The actuation unit (50) is configured to set the humidity of the fibers (1, 2) and/or the humidity of the nonwoven pre-product (3) and/or the ambient conditions in at least one portion of the nonwoven pre-production plant (10).

1 . A monitoring process for a process of producing a nonwoven fabric from fibers in a nonwoven fabrication plant, the monitoring process comprising:
 detecting moisture content and/or the electrical charge of the fibers or of a nonwoven pre-product is with a detection unit in a detection zone;   processing detection results in a data processing unit;   generating an actuation command for at least one actuating unit of the nonwoven fabrication plant; and ( 15 ), wherein the actuating unit is configured to set a moisture content of the fibers and/or a moisture content of the nonwoven pre-product, and/or ambient conditions in at least one part of the nonwoven pre-production plant, wherein the fibers are moistened in a settable moistening unit.   
     
     
         2 . A monitoring process in accordance with  claim 1 , wherein the fibers are moistened in the settable moistening unit by applying a liquid. 
     
     
         3 . A monitoring process in accordance with  claim 2 , wherein the moistening unit is arranged in a production direction in front of a web forming device, comprising a card. 
     
     
         4 . A monitoring process in accordance with  claim 1 , wherein the moistening unit for moistening fibers is integrated into a fiber processing device, comprising a bale opener, a fiber opening device or a fiber blending device. 
     
     
         5 . A monitoring process in accordance with  claim 1 , wherein the moistening unit for moistening fibers is integrated into a web forming device. 
     
     
         6 . A monitoring process in accordance with  claim 1 , wherein the nonwoven pre-production plant comprises at least one settable air conditioning system. 
     
     
         7 . A monitoring process in accordance with  claim 1 , wherein the ambient conditions, comprising humidity of the air and/or temperature, can be set in a fiber processing device and/or in a web forming device by means of an air conditioning system. 
     
     
         8 . A monitoring process in accordance with claim  7 , wherein the nonwoven pre-production plant comprises at least one air-conditioned zone essentially separated from the surrounding area. 
     
     
         9 . A monitoring process in accordance with  claim 8 , wherein the air-conditioned zone is limited in space to a fiber processing device or to a web forming device, especially to a card. 
     
     
         10 . A monitoring process in accordance with  claim 1 , wherein the nonwoven pre-production plant comprises an air conditioning system or a moistening unit, which can be actuated via an actuation command. 
     
     
         11 . A monitoring process in accordance with  claim 1 , wherein the moisture content and/or the electrical change of the fibers or of the nonwoven pre-product are regulated. 
     
     
         12 . A monitoring process in accordance with  claim 1 , wherein the moisture content of a part of the fibers or of a local area of the non-woven pre-product can be set. 
     
     
         13 . A monitoring process in accordance with claim  1 , wherein the nonwoven pre-production plant comprises a moistening unit, which is configured to apply liquid in a settable actuation zone. 
     
     
         14 . A monitoring process in accordance with  claim 13 , wherein the actuation zone extends only over a part of the fibers. 
     
     
         15 . A monitoring unit for a nonwoven fabrication plant, the monitoring unit comprising:
 a detection device for detecting the moisture content and/or the electrostatic charge of fibers ( 1 ) or of a nonwoven pre-product,   a processing unit cooperating with the detection device and configured to carry out a monitoring process comprising:   processing detection results in the data processing unit; and   generating an actuation command for at least one actuating unit of the nonwoven fabrication plant, wherein the actuating unit is configured to set a moisture content of the fibers and/or a moisture content of the nonwoven pre-product and/or ambient conditions in at least one part of the nonwoven pre-production plant, wherein the fibers are moistened in a settable moistening unit.   
     
     
         16 . A nonwoven pre-production plant comprising:
 at least one nonwoven fabrication plant actuating unit; and   a nonwoven fabrication plant monitoring unit comprising:   a detection device for detecting the moisture content and/or the electrostatic charge of fibers or of a nonwoven pre-product; and   a processing unit cooperating with the detection device and configured to carry out a monitoring process comprising:
 processing detection results in the data processing unit; and 
 generating an actuation command for the at least one nonwoven fabrication plant actuating unit, wherein the nonwoven fabrication plant actuating unit is configured to set a moisture content of the fibers and/or a moisture content of the nonwoven pre-product and/or ambient conditions in at least one part of the nonwoven pre-production plant, wherein the fibers are moistened in a settable moistening unit.