The invention relates to a method for optimizing a yarn production process in which foreign materials (90) are monitored in a textile fiber formation (9). The textile fiber formation (9) is illuminated with electromagnetic radiation from at least two color ranges. The foreign materials (90) are classified into different color classes according to their colors. If a sufficiently large random sample with classified foreign materials (90) is available, a frequency distribution of the foreign materials is determined for the color classes and compared with a reference frequency distribution. If the determined frequency distribution deviates from the reference frequency distribution, at least one of a set of multiple optimization actions is performed, e.g., a warning signal is output.

The invention relates to a card with a device for recognizing interfering particles, in particular trash parts, neps, shell neps, thick spots and/or foreign parts in a carded fibre web. The device comprises at least one sensor stationarily disposed in a web guiding element, which is disposed at the transition from a doffer to a stripper roll. The at least one sensor detects the fibre web on the doffer.

The invention relates to a method for optimizing a spinning process, through which a fiber material fed in the form of raw fibers and output in the form of yarn passes, with respect to foreign materials. At a first position in the spinning process, a first foreign material information relating to the foreign materials is determined. At a second position in the spinning process, which is downstream with respect to the first position, a second foreign material information relating to the foreign materials is determined. The first foreign material information and the second foreign material information are associated with each other such that they relate to substantially the same sample of the fiber material. Based on the first foreign material information and the second foreign material information assigned thereto, a change is made to the spinning process to optimize the spinning process.

A method and associated device and system are provided for recording trash in a fiber preparation system having a plurality of cleaning points and a transport line that is connected to the cleaning points and is guided into a central container connected to a negative pressure source for generating transport air. The trash is suctioned from each cleaning point through the transport line with the transport air to the central container and is feed separately from each cleaning point to the central container. In the central container, the trash is separated from the transport air and transferred into a scale for weighing. With the trash located on the scale, an optical recording of the trash is made with a camera directed to an interior of the scale.

A monitoring process is provided for a method for producing a nonwoven product. Properties of a nonwoven pre-product (3), in particular the humidity, the electric charge, the weight distribution, the fiber orientation, the fiber mixing ratio and/or the fiber opening degree of an unprocessed fiber web, are detected by a detection unit (41) having one or more sensors (410).

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).

The present disclosure related to a system and method for recycling fibers from textiles waste. The system includes a first sanitization device; a pre-processing device; a fabric sorting device; a storage device; a fiber processing device; and a second sanitization device mounted in the fiber processing device. The first sanitization device, the pre-processing device, the fabric sorting device, the storage device and the fiber processing device are arranged along a transmission path of the textiles waste.

A method and associated device and system are provided for recording trash in a fiber preparation system having a plurality of cleaning points and a transport line that is connected to the cleaning points and is guided into a central container connected to a negative pressure source for generating transport air. The trash is suctioned from each cleaning point through the transport line with the transport air to the central container and is feed separately from each cleaning point to the central container. In the central container, the trash is separated from the transport air and transferred into a scale for weighing. With the trash located on the scale, an optical recording of the trash is made with a camera directed to an interior of the scale.

The present disclosure related to a system and method for recycling fibers from textiles waste. The system includes a first sanitization device; a pre-processing device; a fabric sorting device; a storage device; a fiber processing device; and a second sanitization device mounted in the fiber processing device. The first sanitization device, the pre-processing device, the fabric sorting device, the storage device and the fiber processing device are arranged along a transmission path of the textiles waste.

A measuring device for measuring stickiness, imperfections and impurities in textile fibers, such a device includes a housing inside which a pair of rollers are placed, arranged side by side to one another and rotating in opposite senses and between which a web of cotton fibers is made to pass. The rollers are heated, the sticky fractions of the web that adhere to the rollers after the passage of the web between them are detected, and the sticky fractions adhering to the rollers are removed, wherein the heating is controlled by a processing and control unit as a function of the temperature of the rollers detected by a temperature sensor associated with them.