Sacks, Feed sacks
Heavy-duty bag making machines are specialized equipment for producing large packaging bags (typically rated for 25-50 kg or more) used in fertilizers, feed, grain, chemical raw materials, and other industries. They serve as the critical terminal component in the entire production line.
Core Features: High Strength, High Efficiency, High Stability
1. High Automation and Efficiency
Assembly Line Operation: Heavy-duty bag making machines are typically integrated with printers, feeders, and other equipment to form fully automated production lines. The entire process—from feeding roll stock (pre-woven and printed tubular fabric) to automatic edge folding, cutting, bottom stitching (or heat sealing), counting, and outputting finished products—is fully automated. This significantly reduces manual intervention and achieves extremely high production efficiency.
· High-Speed Operation: Modern heavy-duty bag making machines operate at high speeds, producing 20-40 or more finished bags per minute, meeting the demands of large-scale industrial production.
2. Robust Sewing and Sealing System
This constitutes the core component of heavy-duty bag making machines, directly impacting the bags' load-bearing capacity and safety.
· Industrial-Grade Sewing Heads: Equipped with specially designed high-power sewing heads using durable sewing thread (typically polyester).
· Double-Strand Chain Stitching: The most commonly employed sewing method. It creates strong, resilient, and elastic stitches that withstand heavy loads and intense impacts/vibrations during transportation, effectively preventing thread breakage or slippage.
· Heat Sealing Option: For bags requiring ultra-high moisture resistance, select models can be equipped with a heat sealing system. By heating the inner PE film to melt and bond it, a fully sealed closure is formed, offering exceptional moisture protection. A combined "sewing + sealing" approach is also available, adding a heat-sealed strip over the stitched seam for dual reinforcement.
3. Precise Material Handling and Positioning Systems
· Automatic Hemming Device: Automatically performs a double fold on the bag opening (commonly known as "hemmed edge"). This not only enhances the bag's appearance but significantly strengthens the opening, preventing tears during lifting and handling.
· Photoelectric alignment system: Ensures roll material stays centered during movement, guaranteeing precise positioning of printed patterns and accurate alignment for cutting and sewing.
4. Robust and durable mechanical structure
· Heavy-Duty Steel Frame: Designed to handle thick, high-strength woven fabrics continuously, the machine features an exceptionally robust frame to withstand sustained tension, vibration, and impact, ensuring long-term stability and precision.
· Wear-Resistant Components: All critical parts—including guide rollers, feed rollers, and blades—are manufactured from high-strength, wear-resistant materials for extended service life.
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