BSW Machinery sack conversion lines and textile packaging

Engineering standards and kinematic design of BSW converTex conversion lines

High-speed automated converTex conversion lines developed by BSW Machinery are engineered for uninterrupted adhesive-free fabrication of block bottom valve sacks from tubular polypropylene fabric.

Unlike conventional sackmaking methods dependent on expensive adhesives and energy-intensive drying ovens, BSW equipment employs patented thermo-contact hot air and ultrasonic welding techniques across bag bottom folds.

The kinematic layout features rotating drum cylinders with clamping bars, pneumatic unfolding fingers and electronic valve tape synchronizers.

This mechanical assembly produces exact geometric dimensions across every finished sack, eliminating powder leakage during high-throughput packaging operations on rotary filling spouts.

Lighter & Stronger packaging design and nanoTex cyclo micro-perforation

A key technological breakthrough by BSW Machinery is the Lighter and Stronger (LS) packaging concept.

By optimizing molecular orientation during polymer tape stretching and applying nanoTex cyclo cyclic perforation, standard fifty-kilogram cement sack weight drops to sixty-five grams while maintaining full tensile drop ratings.

MicroSTAR needle modules produce tapered micro-holes with smooth perimeter rings, enabling rapid air expulsion during high-pressure pneumatic filling without bulk material dusting.

This design yields substantial raw polymer savings during manufacturing, decreases transportation freight expenditures, minimizes factory scrap and ensures stable pallet stacking in storage facilities.

Precision tubular fabric weaving on advanTex series circular looms

BSW advanTex circular looms deliver rapid formation of seamless woven tubular fabric with uniform tape density along continuous production rolls.

Kinematic architecture featuring six and eight shuttles running on alloy roller bearings minimizes tape friction, preventing twisting and localized thermal overheating of polypropylene strands.

Each shuttle is fitted with a bobbin runout sensor, while the heddle frame is driven by a balanced conjugate cam mechanism.

Automated warp tape tension regulation with spring-loaded compensators maintains consistent tubular diameter without width variation, producing an even fabric foundation for subsequent coating extrusion and high-speed bottom conversion.

Oriented polypropylene tape extrusion and drawing on tiraTex lines

The tiraTex extrusion production line performs continuous plasticizing of polypropylene resins with additives, sheet extrusion through coat-hanger slot dies and subsequent longitudinal orientation.

Uniform heating profiles across barrel zones and barrier screws prevent polymer degradation during high output rates. A quench water bath stabilizes film structure prior to precision slitting on an alloy blade beam.

Thermal stretching inside a long circulation hot-air oven aligns the polymer matrix, raising specific tape tenacity up to seven grams per denier, which is required for reliable weaving on high-velocity circular looms without warp or weft tape breaks.

Servo-driven flexographic printing and product labeling on servoTex units

BSW servoTex flexographic printing modules are engineered for applying fine multi-color artwork, barcodes and technical specifications onto moving tubular woven fabric prior to bottom forming.

Direct servo drives on plate cylinders and anilox rolls completely eliminate gear backlash, ensuring accurate longitudinal and transverse print registration. Enclosed dual-blade chamber doctor systems with continuous circulation prevent solvent evaporation during continuous operation.

Interdeck hot air drying hoods quickly evaporate ink carriers, ensuring complete ink setting before fabric winding into rolls ready for conversion line processing.

Scheduled overhaul routines and factory component support under Starlinger

Following the integration of BSW Machinery units into the Starlinger engineering group, a worldwide service network provides preventive overhaul support and continuous component replacement.

The maintenance inventory encompasses welding hot air wedges, temperature sensors, Teflon belts, guillotine cutting knives and pneumatic directional valves.

Replacing shuttle rollers and guide plates on advanTex looms according to planned maintenance schedules prevents unplanned shutdowns within sackmaking facilities. Component selection based on machine nameplates guarantees dimensional interchangeability and reliable three-shift factory operation.