Compound Needle Technology for Warp Knitting
topic
Compound needles use a sliding tongue or closing element that moves independently of the needle hook under external cam control, with the closing element opening the hook for yarn intake and closing to cast off the previous loop, enabling higher operating speeds than latch needles on tricot machines by reducing the mechanical motion required per knitting cycle and providing more precise timing control over hook opening and closing.
Role
Enables the very high production speeds of modern tricot warp knitting machines through the externally controlled closing element that provides faster and more reliable hook operation than the self-acting latch mechanism at speeds above 2000 courses per minute, with compound needle design being the enabling technology for the 3000 to 4000 courses per minute speeds achievable on high-productivity tricot machines.