What is the main function of carding machine?
Carding is a mechanical process that disentangles, cleans and intermixes fibres to produce a continuous web or sliver suitable for subsequent processing. This is achieved by passing the fibres between differentially moving surfaces covered with card clothing.
How does the carding machine work?
In the carding process, the fibres are separated and then brought together into a loose strand (sliver or tow). The process involves use of machine that splits up the locks and tangled clumps of fibre and then lines up each fibre so that all the fibres are almost parallel with each other.
Which motor is used in carding machine?
The cylinder motor is the only heavy rated motor in the machine panel. This is only pulling the PF down and hence carding SSB PF is around 0.5 only. By retrofitting this gadget in all the carding machines, the carding SSB PF automatically goes up to 0.90 PF, thus reducing the kVA demand from the carding section side.
How do you control Neps in carding?
The most critical setting in a carding machine is between cylinders and flat can be close as 0.2 to 0.25 mm; neps are directly affected by this setting. Very close setting increase the flat waste. Normally the setting between the feed plate and licker in is around 0.45 to 0.7 mm.
What is modern carding machine?
Carding is defined s the reduction of entangled mass of fibers to filmy web by working them between two closely spaced relatively moving surfaces clothed with sharp points. It is a preliminary process in spun yarn technology just after blowroom process. Carding operation is done by carding machine.
Why carding is called the heart of spinning?
CARDING IS CALLED THE HEART OF SPINNING: In carding, fibers are opened to more or less single fibers. Dust, dirt, neps are removed here. Fiber blending and parallelization are also done here. Since all the major functions are performed in carding, it is called the heart of spinning.
How do you reduce imperfections in yarn?
Higher fiber openness results in less imperfection in yarn due to the fact that higher fiber openness results in better fiber individualization in card sliver, which in turn produces quality yarn. The carding process has a major impact on yarn imperfection.
How is carding draft calculated?
Some Important Conversion Factors for Carding Machine Production Calculations:
- 36 inch = 1 Yard;
- 1 Lea = 120 Yards;
- 1 Meter = 1.0936 Yards;
- 1 Pound (lb) = 453.6 Gram = 16 Oz.
- 840 Yard = 7 Lea = 1 Hank;
- 1 Pound (lb) = 7000 Grains;
- 1 Meter = 39.37 Inch;
- 1 KG = 2
What is grinding in carding?
GRINDING OF CARD CLOTHING WIRES, CARD CLOTHING WIRES GRINDING: When carding machine does it’s work, the wire points get blunt. The sharpness of clothing wire’s points get lost. It happens due to abrasion between wire’s point and material to be processed.
What are the functions of a carding machine?
The primary functions of the carding machine can be listed as follows – Individualization of the fibers and bringing them to single fiber state Identification of the shortest fibers that lack the spinning ability and eliminate them Generating sliver in order to facilitate the subsequent processes
How is raw material supplied to a carding machine?
In modern installations, raw material is supplied via pipe ducting into the feed chute (of different designs) (2) of the card. An evenly compressed batt of about 500 – 900 ktex is formed in the chute. A transport roller (3) forwards this batt to the feed arrangement (4).
Why is carding necessary in a spinning factory?
You wouldn’t find any other machine in the spinning factory that has the ability to compensate for the defects that initiate from carding. That makes it essential that the carding should accurately choose, open, clean, and parallelize fibers without degrading or damaging them. Why carding is necessary?
Which is better a or B carding machine?
A & B lines in the carding department are the same but the line C employs the better quality. There are 4 cards in line A, 5 cards in line B and 6 cards in line C. In Malwa Industries Ltd. all cards are made by RIETER and havingmodel C-50 which is the latest model of card. The waste removal at the carding stage is 5-6%.