6-needle rubber roller

The upper and lower rollers in a 6-needle elastic sewing machine form a synchronized positive-feed system designed to ensure stable fabric transport, controlled elastic tension, and slip-free stitching performance. These rollers operate together to grip, guide, and advance elastic materials during multi-needle sewing operations, particularly in applications such as waistband attachment, sportswear production, and elastic band assembly.The primary function of the roller system is to maintain uniform feeding while preventing material distortion. In elastic sewing processes, uncontrolled slippage or uneven pressure can result in stitch irregularity, tension imbalance, or material deformation. Therefore, the roller geometry, spline configuration, and surface profile are engineered to balance traction and surface protection.The upper roller functions mainly as a pressure-regulating and guiding component. It applies controlled vertical force onto the elastic material while rotating in synchr