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| Special structure of the cantilever cylindrical is particularly suitable for tubular dust bags and other tubular sewing. | |||||||||
Known as Tubular Filter Bag Sewing Machine and Triple-Needle Cantilever Stitching System, this specialized sewing equipment is engineered for manufacturing cylindrical dust filter bags—addressing the unique challenge of sewing consistent, durable seams on tubular fabrics. Its cantilever design provides unobstructed access to workpieces up to 6 meters in length, enabling continuous sewing of large filter bags used in power plants, incinerators, and cement kilns.
Equipped with three synchronized needles and a bottom feed system, the machine produces parallel stitch lines with 8–12 stitches per cm (adjustable) at speeds up to 8 m/min. Unlike standard flat-bed sewing machines limited by workspace, this cantilever system handles tubular diameters from 120mm to 300mm, making it indispensable for producing heavy-duty dust collection bags from aramid, PTFE, and glass fiber materials.
• Triple-Needle System: Three independent needle bars with synchronized thread tension control (±1% accuracy) produce parallel seams, increasing seam strength by 50% vs. single-needle sewing.
• Stitch Options: Supports lockstitch (ISO 4915) and chainstitch (ISO 4916) patterns, with stitch length adjustable from 2mm to 5mm for different material thicknesses.
• Thread Compatibility: Handles high-performance threads (aramid, PTFE, glass fiber) in sizes 20/2 to 20/5 tex, compatible with filter bag operating temperatures up to 260°C.
• Workspace Design: 6-meter cantilever arm with adjustable height (700–1100mm) and 360° rotating worktable for easy access to all sewing positions.
• Material Handling: Pneumatic fabric clamping system prevents slippage, with feed rate synchronized to sewing speed for uniform stitch formation.
• Control System: PLC-based operation with 10-inch touchscreen, allowing operators to store 50+ sewing programs for quick recall of stitch parameters.
This 3-Line Cantilever Sewing Machine is essential for manufacturing large dust filter bags:
• Power Plant Filters: Sewing 6-meter aramid bags for coal-fired boiler dust collection, with triple-needle seams resisting 1700N tensile force (ASTM D5034).
• Waste Incineration: Stitching PTFE-coated glass fiber bags (260°C max temp) with PTFE thread, ensuring seams withstand acidic flue gases.
• Cement Kilns: Producing abrasion-resistant PTFE bags with reinforced top and bottom seams, critical for withstanding 20 m/s dust velocities.
• Metal Smelting: Sewing meta-aramid bags for electric arc furnace dust collection, with heat-resistant seams enduring 218°C temperature spikes.
Compared to standard sewing machines and manual stitching, this system offers significant benefits:
• Seam Strength: Triple-needle construction provides 50–75% higher tensile strength than single-needle seams, reducing seam failure rates by 90%.
• Production Efficiency: 8 m/min sewing speed vs. 2–3 m/min for standard machines, increasing daily output from 50 to 200+ 6-meter bags.
• Large Bag Capability: Cantilever design eliminates length restrictions, enabling production of 6-meter+ bags that standard machines cannot handle.
• Quality Control: Consistent stitch density and tension reduce rework rates from 15% (manual) to <2% (automated), lowering production costs.
Our sewing machine customization ensures compatibility with specific manufacturing requirements:
• Bag Analysis: Evaluation of bag dimensions, material type, and seam specifications to recommend needle configuration and thread type.
• Machine Configuration: Options include automatic thread cutters, seam trimmers, and thread break detectors, with custom table sizes for oversized bags.
• Thread Testing: Samples undergo 1000-hour thermal aging tests (per ISO 4892) to verify thread performance at operating temperatures before production.
• On-Site Commissioning: Installation includes calibration of stitch tension and feed rate, with seam strength testing to ensure ≥1500N/5cm performance.
• Operator Training: 4 days of specialized training covering thread handling, tension adjustment, and maintenance of cantilever mechanisms.
