Project 8 Fiber cloth spinning machine Preliminary design co

Project 8. Fiber cloth spinning machine Preliminary design concepts Components to be tested Gear Shaft Motor

Solution

firstly what is fiber spinning

Fibers can not be used to make clothes in their raw form si it must be converted into yarns. The process used for yarn formation is spinning. Spinning by hand was a slow and laborious proces so Many implements and methods were invented for making it faster and simple. Eventually, the techniques were refined and industrial spinning started manufacturing yarn in various ways. The methods selected depend upon the factors such as the manufacturer\'s preference of equipment, the economic implications, the fibers to be used and the desired properties of yarn to be produced.

Hand spinning was replaced by powered spinning machines which was very fast. Initially it was done by water or steam power and then by electricity. The spinning jenny, a multi-spool spinning wheel significantly reduced the amount of work required to produce yarn. A single worker was now able to work eight or more spools at a time.

some concepts of design are as follows

a roving taken from the roving frame is passed to a conventional double-apron drafting arrangement subjected to a draft of up to 80-fold.

The fibers exit freely from the front cylinder. They must then be collected to form a fiber strand and twisted to form a yarn.

The first of these operations is performed by the electrostatic field, and twisting is carried out in a twist-imparting unit .

Twisting presents no problems. The complexity of this method lies wholly in the electrostatic field generated between the front roller and the twist element by earthing the front roller and applying a high voltage (about 30 000 - 35 000 V) to the twist element.

This field has to accelerate the fibers and guide them toward yarn end while maintaining the elongated configuration of the fibers.

When the fibers enter this field, they take up charge and form dipoles, i.e. one end becomes positively charged and the other negatively charged.

An open yarn end projects from the twist element into the field. This yarn is negatively charged and is therefore always attracted to the front roller.