The motion which delivers the
warp from the warp beam at the required rate that a suitable constant tension
by unwinding it from a flanged bobbin called let off motion.
Showing posts with label O. Show all posts
Showing posts with label O. Show all posts
Overlock Sewing Machine
For seaming, edging or hemming the overlock machine is perfect which sew the one or two pieces of cloth. After sew the fabric overlock machine cut the edge of the fabric. In North America this is called Sergers. But there is some overlock machine which not included cutter. Cutters helps to done the work very fast, easily and quickly. Overlock machine is not same as lockstitch sewing machine which uses loopers fed by multiple thread cones rather than a bobbin. The RPM of overlock machine is 1000 to 9000. Overlock sewing machine is also can be used for construction, reinforcement or decoration.
Degree of Orientation
Between the mean angles of chain
molecules the Degree of Orientation is defined. The size and the fiber axis
which indicates the difference between fine and course structure.
Open shed
In this type of
shed, the warp threads from two stationary lines, one at the top & other at
the bottom. After inserting a pick, change are made by carrying threads from
one fixed line to another. So some threads are lowered from the top line &
some are raised from the bottom line during the change raising & lowering
of the threads occurred simultaneously.Objectives of Textile Finishing
The Objectives of Textile Finishing are given below:
- To improve the attractiveness and service ability of the textile materials.
- To accentuate/inhibit some natural characteristics on the textile materials such as softening, de-lusturing, brightening etc.
- To change the surface characteristics of textile materials.
- To impart new characteristics/properties of textile materials such as flame retardant, water repellent or water proof finishes.
- To increase life and durability of textile materials.
- To set the fabric, so that it can be maintained its shape and structure.
- To set the chemicals into the textile materials.
- To meet up specific end uses.
Opening
To carrying out the basic
operation of spinning, Opening is needed. The raw materials enter the spinning
mill in highly pressed from to enable optimum transport and storage condition
to be used. Thus Opening must precede the basic operation.
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