20 ANDRITZ + XERIUM
Burling / joining department Following weaving, a 100 per cent quality inspection is carried out in the burling department. Any defects that may have occurred during weaving are removed or rectified. Flat-woven base fabrics are made endless in the joining department on seaming machines.
Pulp Paper & Logistics
machines with multiple needle boards. The special felt needles used for this have barbs pointing towards the tip on their three-edged front. When the needle enters the batt, the barbs fill up with fibres and transport them through the base fabric. After several passes on the needling machine, the felt attains the necessary density and the fibers are sufficiently embedded in the fabric.
Batt preparation / production In the batt preparation department, the fibers, which have been compressed into bales, are opened for the ensuing carding procedure. By means of this opening and mixing of fibers that have different material properties or degrees of fineness, a homogeneous mixture of fibres is obtained, which is then needled to a stable batt on the needle loom.
Heat setting / finishing machine The needled felts from the needling department are once again placed on the heat setting machine. There the felt is finished for the end-user in a thermal- hydraulic process, i.e., it is washed, pre- compacted and, if necessary, impregnated against
impurities. The felts are heat-set, cut to size, the edges are sealed, and a trade line is applied to facilitate correct installation into the paper machine.
Final inspection The final inspection is the last stage in the
Huyck.Wangner Austria Quality Assurance Organization and ISO 9001. Since every component has been stringently checked during the entire process, the final inspection of the completed felt focuses not only on product-specific components, but also on position-related demands. This guarantees a high standard of quality as well as excellent reproducibility.
Needling department Before needling, the fabric is heatset (exposed to temperature and tension) on the heat setting machine for the first time. Then, the pre- needled fiberweb is needled into the base fabric on modern needle
July/August 2019
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