Sectional Warping

• Also called Indirect warping.
• It was developed for pattern warping for making fancy designs.
• Striped designs can be made easily over the beam. 
• It is a 2 stage process and warping speed is less than that of direct warping.
• The output is directly the weaver’s beam, ready to mount over the loom.
• The beam is prepared in sections.

 

Process specifications

• Winding speed : Upto 800 mpm 
• Beaming speed : upto 300 mpm
• Working Width : 1800 to 4200 mm
• Package : Weaver’s beam
• Creel type : H-Creel (used for low speed warping)
• Drum circumference : 3140 mm
• Cone angle : 7⁰ /8.5⁰ /10.5⁰

Principle and working of the machine

• This is done by using inclined drum. 
• There are two types of drum :-

                Fixed inclination
                Variable inclination

• As the sections are wound over the drum, the inclined surface provides the support to the yarn so that the thick structure formed does not collapse.
• During winding of each section and before starting of new section, a lease thread is placed to identify it from the previous section.
• The drum keeps traversing perpendicular to the direction of warping. This keeps the material in alignment with the drum angle. 
• The warp sheet is then transferred over to the weaver’s beam. This means that the yarn end which first goes into the drum is on the upside on weaver’s beam.
• Section : A section is defined by the complete warp length wound over the dresser drum. Suppose beam length is to be 5000m, then each section is completed when 5000m yarn is wound over the dresser drum.
• The width of section depends on 

1. Number of colours to be used in the pattern
2. Number of yarn packages available
3. Capacity of the creel
4.  Complexity of the pattern