The creel is also equipped with automatic sliver break stop motion. If sliver breakage occurs, the stop motion of the creel acts immediately and stops the machine. It is designed in such a way that it helps to mend the broken sliver easily and safely. A guiding device leads the rollers into the drafting system.
• High degree of accuracy in both operation and adjustment make it performance-oriented.
• It is designed to work at a very high speed without any quality compromise.
The bottom rollers are made of steel. The bottom rollers are mounted in the roller stands or frames with the help of needles or ball bearings. These rollers are driven by main gears.
The top rollers are negatively driven. They are fitted with the help of ball bearings in the machine. Top rollers are manufactured by using durable materials. The surface of the top roller is coated with synthetic rubber. The softness of rubber affects the fibre gripping capability directly. If soft rubber is used in roller coating, it helps to grip the fibres more efficiently but it has less durability. The hardness of rubber used for coating on top rollers is measured in terms of degree shore.
This system also consists of a pressure bar with a special profile in the main drafting zone which ensures accurate fibre guidance because the smaller size of the bottom roller bearing allows smaller roller gaps in comparison to other draw frames. This characteristic results in the form of good processing of cotton types with short fibre lengths. The fourth top roller gently diverts the fibres and also ensures perfect running properties. A correctly designed web guide nozzle brings the web together especially gently after it leaves the drafting system and prevents unwanted fibre entanglement.
When the sliver gets wrapped on the rollers, this load relief motion acts immediately and releases a load of top rollers thus it prevents deformation of the covers during machine stoppages which assures the quality of the sliver produced. The large diameter of the top rollers compared to competing products guarantees superior running properties with low roller temperature and long service life.
Carding process parameters
Carding faults, defects of sliver and their remedies
Precautions of carding process, process control in carding
Card clothing wire's grinding