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Precision Woven Wire Cloth for Various Applications

Discover the high-quality woven wire cloth produced by G. BOPP & CO. AG, offering Swiss precision and fine wire weaving for applications worldwide. With decades of experience, they provide a wide range of stainless steel wire products with exceptional tensile strength and a smooth surface area.

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Precision Woven Wire Cloth for Various Applications

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  1. Swiss precision woven fine wire cloth for applications worldwide

  2. Organization BOPP Utildi AB Sweden G. BOPP + CO. AG Head Office Zurich Spörl KG Germany G. BOPP + CO. AG Manufacturing Wolfhalden G. BOPP & CO. LTD England Filinox AG Fine wire drawing Wolfhalden BOPP AsiaSamwoo Enterprise South-Corea G. BOPP USA INC. New York BOPP AsiaSamwoo Enterprise Shanghai BOPP Italia SRL Italy

  3. From wire to premium mesh Definition of specifications Procurement Wire drawing Wire inspection Processing Weaving Mesh inspection

  4. FILINOX AG: fine wire drawing in Wolfhalden • Fine wire drawing on site at the BOPP factory in Wolfhalden • Established in 1979 • 30 employees • Production range 18 – 100 µ, stainless steel AISI 304/316 • Producing approximately 1.5 million meters per day, 50 tonnes per year • Provides approximately 50% of the total weaving mill requirement for stainless steel wire

  5. The highest standards of procurement and processing • Semi-finished product delivered as  0.9 mm wire • Controlled availability, sustained market price • Quality often poor after sintering • Contaminants cause breakages in fine wires: Maximum size of foreign particle 1/10 of wire diameter

  6. The wire drawing process Cold Zone Hot Zone

  7. Filinox wire drawing Wire drawing equipment Drawing dies Shaft drive

  8. Annealing the wires Annealing oven to 1130°C Pipe ducts filled with nitrogen and hydrogen prevent spoilage due to excess annealing temperatures and carbonisation, ensuring a bright, gleaming wire surface

  9. Inspection, processing • Final inspection for twist and tensile strength • Classifying according to homogenous values • Winding on warp and weft spools • Traceability- Semi finished product batches- Machine number- Employee number

  10. Principal wire properties • High tensile strength:Vital for the production of good screen printing stencils • Smooth surface area:Vital for good colour, paste and filtrate throughput Smooth surface area Rough surface area

  11. The Wolfhalden weaving mill • Constructed in 1956, most recent expansion 2008 • 105 employees, 2 shifts • 145 looms • 170 tonnes of metal processed each year • 17.5 million kilometers of wire processed each year • 340 kilometers of mesh produced each year • Fine wire cloth to Ø 0.0180 mm (18µ wire diameter) • New, fully air conditioned weaving hall • Special vibration-free foundations • Cleanroom classification 100‘000,10‘000 in new weaving hall

  12. Warping: Windingthe warp wires Warping frame • Winding the warp wires on the warp beam • Warping frame accommo-dates 1000 spools • Winding: in bundles Example: • 200 Mesh  8000 wires on a 1m width • 400 Mesh  16‘000 wires on a 1m width • Average work content:33 hours Warp wires Warp beam

  13. Feeding: Preparation for weaving • Every wire passes through an opening in the heddle and then through the weaving reed • Extremely demanding, for:Zero error tolerance • The finer the wire cloth, the greater the challenges Examples: • 200 Mesh,  40 µ8000 wires/1m widthPreparation time 36 hours • 400 Mesh,  25 µ16‘000 wires/1m widthPreparationtime 88 hours

  14. Weaving loom operating modes Weaving reed Shaft with heddles Wire cloth beam Warp wires Weaving reed Heddles Weft wire

  15. Weaving process: Weft transfer TODAY: Rapier type - Belt drive - Pole gripper YESTERDAY: Shuttle looms - outdated, slow - reduced productivity

  16. Weaving looms – yesterday and today Jaeger ca. 1960 HABO 2005

  17. Quality control • Weaving quality - BOPP standard BN, more stringent than ISO-Standards - reduced weaving defects - increased precision • Final inspection - SD: mesh thickness - SI: aperture size - FI: optical light inspection (pin holes) • Traceability - Semi finished goods batches - Loom number - Employee number

  18. BOPP – Swiss Qualitity since 1881 G. BOPP + CO. AGBachmannweg 21CH-8046 ZurichSwitzerlandPhone +41 (0)44 377 66 66Fax +41 (0)44 377 66 77Mail info@bopp.comWeb www.bopp.ch

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