Multiple Delivery Unit Frame
Solution for weaving from the creel with multiple independent positively controlled brake drums.
AN EXAMPLE OF THIS SOLUTION FAMILY:
WARP THREAD FEED SYSTEMS
DESIGNED FOR GREATER SYSTEM EFFICIENCY AND HIGHER FABRIC QUALITY
OVERVIEW
In weaving from creel, the warp threads are fed to the weaving machine via feeding units that are under consistent tension.
In ribbon weaving mills the warp yarns are often stored on several sectional warp beams. For conventional negative electronic let-off devices, the warp thread tension is created by braking the bobbins with belts or cables. These devices are cost-effective and very simple, but a consistent thread tension from a full to empty bobbin is not ensured. They do not provide an optimal solution for high-quality and elastic fabrics.
There are various warp thread feed systems available for improving these negative characteristics.
KEY ADVANTAGES
- The feeding units are integrated in existing and new racks
- The number of feeding units is dependent on the fabric construction
- Each feeding position is separately powered by a gear motor
CONSTANT WARP THREAD TENSION
When weaving from a creel special attention should be given to the warp delivery unit between creel and weaving machine. This unit ensures that the weaving machine is provided with the correct length of warp yarn. By using a delivery unit to maintain the constant tension of the warp threads, the productivity and product quality of the weaving machine can be further improved.
The delivery unit regulates the warp tension between the creel and the weaving machine. A feeding roller guides the warp material to the weaving machine with the desired tension. Typically, the warp tension between the creel and the delivery unit is lower than the tension between the delivery unit and the weaving machine.
The warp tension between the delivery unit and the weaving machine is measured by a load cell and monitored by the control unit. The required warp thread tension can be directly adjusted via the control unit.
Bobbin creels are used in technical applications such as warping, weaving, knitting, and pultrusion. They must accommodate the required number of spools and ensure that the yarn tension is equal across the entire warp sheet. The size of the bobbins creel and the number of spools depend on the number of yarns. If the available space is insufficient, using additional warp beams in a separate frame provides the optimal solution.
