Carder, web guiding element, spinning mill preparation installation and method for identifying undesired particles
AssigneeTrüTzschler Group SE
InventorsGuido Engels, Jürgen März
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Abstract
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.
Claims11
A card having a doffer followed by a stripper roller and a device for recognizing interfering particle including trash parts, neps, shell neps, thick spots and/or foreign parts in a carded fibre web, the device comprising:
- a web guiding element adapted to be disposed at a transition from the doffer to the stripper roller, the web guiding element having a front side disposed towards the doffer and including at least one light-transmissible element;
- a polarizing filter disposed within the web guiding element at the light-transmissible element;
- and
- at least one sensor stationarily disposed in the web guiding element for detecting the interfering particles in the carded fibre web on the doffer.
A web guiding element formed for guiding the fibre web in a card, from a doffer to a stripper roll, the web guiding element comprising:
- four sides defining a hollow space, with one of the four sides comprising a front side disposed toward the doffer and including a light-transmissible element;
- a polarizing filter disposed within the web guiding element at the light-transmissible element;
- and
- at least one sensor stationarily disposed within the hollow space for detecting in a carded fibre web on the doffer interfering particles, including at least one of trash parts, neps, shell neps, thick spots and foreign parts.
A spinning mill preparation installation, comprising:
- at least one blow room or opening line with at least one controllable machine having a control input and being located upstream from at least one card having at least one sensor for detecting interfering particles including at least one of trash parts, neps, shell neps, thick spots and foreign parts in a carded fibre web, wherein the at least one sensor produces sensor data relating to the interfering particles;
- and a control arranged and adapted for receiving, combining and evaluating the sensor data, the control including an input for receiving at least one reference variable corresponding to fibre quality from an input module, and the control being operable for transmitting a modified variable to the control input of the of the controllable machine for adjusting a sensitivity setting of the controllable machine to control quality of the carded fibre web.
A method of detecting and controlling interfering particles including at least one of trash parts, neps, shell neps, thick spots and foreign parts, in a carded fibre web output from at least one card, with at least one sensor disposed in the at least one card, comprising:
- combining data of the at least one sensor of the at least one card and performing an evaluation of the data in a control with respect to a reference variable;
- and
- employing the control to communicate the evaluation with to a control input of a controllable machine arranged upstream of a fibre input to the at least one card to control a sensitivity of the upstream controllable machine.
Dependencies are inferred from the claim text.