1. Bale openers and blenders
In the spinning mill, yarn manufacturing starts when the raw fibers (cotton, wool or synthetic fibers) are delivered in bales. First of all, a bale opener loosens tufts from the raw bales. Bale opening can be manual and automatic. When bales are opened automatically, a bale cutter removes the tufts from the raw bales, which are stacked next to one another. A vacuum and the downstream pipes convey the tufts to the next step in the process. In automatic bale openers, the purpose of the conveyor belts is to cover and therefore seal the suction channel. When bales are opened by more compact hopper feeders manually, the raw bales are loosened mechanically and their blend is already very precise.
Once the tufts have been cleaned and foreign bodies removed mechanically, the tufts are combined and mixed in the blender. Blending the tufts homogenizes the subsequent yarn quality.
Technical requirements for the belts
Automatic bale openers require belts that are exceptionally laterally stiff, but longitudinally flexible so that the vacuum channel is sealed reliably. In more compact hopper feeder bale openers, fibers must be fed reliably to the opener rollers/belts without fiber accumulating. Conveying synthetic fibers that differ in terms of moisture and where yarn lubricant has been applied in hopper feeder bale openers and blenders, requires the conveyor belt coating to have a dirt-repellent surface and chemical resistance.
Certain Siegling Transilon conveyor belts offer the ideal solutions for this process. Due to its surface quality and lateral stiffness, a polyamide belt is predestined to cover the suction channel during automatic bale opening. Depending on the belt design and coating chosen, Siegling Transilon conveyor and processing belts are antistatic, resistant to oil and grease and their surface quality is so high that the material is conveyed reliably and gently. Siegling Transilon belts stand out for reliable belt tracking, durability and the ease with which they are fitted.