How does carding machine work

Taker in-cylinder zone: From the feed roller-taker in zone, the opened tufts are transferred to the taker in-cylinder working zone for opening to small tuft size.

For cleaning, the material is passed over grid equipment and mote knife attached the underside of taker in. Here points are in face to back arrangement. Suction ducts carry away the waste from trash box. Cylinder-Flat zone: The small tufts are then transferred to cylinder-flat zone and opened up into individual fibers which are defined as the actual carding process.

Here points are in face to face arrangement. Neps are removed in this zone. The flats comprise individual carding bars combined into a belt moving on an endless path and approx.

The rest are on the return run. During this return, a cleaning unit strips fibers, neps and foreign matter from the flat bars. Cylinder-doffer zone: After the carding operation, the cylinder carries along the fibers s that are opened to single and loose condition as well as lie parallel without continuous structure. For the purpose of forming a continuous structure of the carded single fibers s the doffer is required. The doffer combines the fibers s into a web.

Icon color: Change color to parent color on hover. Short staple spinning - 1. Yarn Engineering. Carding Introduction Part 01 March 14, Md. Omar Faruk. Naturally Colored Cotton March 14, Md. Zein Fibre March 14, Md. Groundnut Fibre March 14, Md. The carding room equipment thus performs the same operations already carried out in the preparation stage, this time more thoroughly, supplying the divider with rovings of the right count.

The card used in woolen spinning is traditionally the sort with cylinders covered with clothing that is angled to varying degrees , which rotate at different speeds, affecting the three cardinal actions: carding, stripping and raising.

Appropriately combined, these three actions allow opening of the tufts, continuous detachment of the fibers from the card clothing, which would otherwise soon become clogged up, and delivery of the material from the machine at the end of a processing cycle. Bhagalpuri Silk Fabric Weaving Process. Nanotechnology Benefits in Fabric Formation. In order to avoid sliver variation draft calculation should be correct.

Testing of sliver must be on time at least 3 times during shift. Ring Spinning, the widely used yarn formation technique. Draw frame Functions. Winding Calculation and objective. Short Story of Textiles transformation of fiber to fashion. Speed frame. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Woven Fabric Construction.

Recycled Italian Zero Impact Wool. Schiffli Embroidery Machine Shuttles. Likes Followers Subscribers Followers. The licker-in is covered with saw toothed wire clothing.

These saw tooth wire removes the fibre tufts from the input fibre mat. The draft between licker-in and feed roll is kept around The ratio of surface speed between the licker-in and the feed roll is equal to draft.

High rotational motion of the licker-in creates centrifugal force. This centrifugal force tries to eject the heavy trash particles, and seed coats fragments out at the mote knives with the assistance of air draft.

The licker-in eliminates about half of all trashes present in the cotton fibres. The opened and cleaned fibres by licker-in gets transferred to the main cylinder using stripping action. The cylinder strips the fibres from licker-in. Now these fibres begin to travel between cylinder and flats, this area is called carding zone. The surface speed of the main cylinder is kept higher than the licker-in to perform fibre removal by main cylinder from licker-in.

The surface speed of the licker-in varies between — metres per minute. The surface speed of the cylinder ranges from metres per minute to metres per minute. In this way, the draft varies between1. The carding action with the cotton tufts takes place between cylinder and flat region. According to carding principle, carding action takes place when two surfaces having wires inclined in opposite direction and rotating in opposite directions one surface passes other point against point.

The flats are the bars which are covered with wire clothing. These flats rotate at very slow speed in the opposite direction of cylinder rotating at high speed. The speed of he flats varies with in the range of 8 — 20 centimetres per minute. Both are closely set to each other. The clearance between flats and cylinder is set by considering following factors:. Mechanical factors:. The bearing condition, the shape and dimensions of the wires are some of mechanical factors which affect the clearance between flat and cylinder.

Type of material to be processed:. This setting is so important because it plays very critical role in neps formation. The main cylinder is the central part of the card. It has a diameter of approximately 1. It contains an area of 4. The carding surface of the cylinder is made up of more than By shifting the web feed unit and the doffer below the cylinder, more room has been made for the functions of pre- carding and post-carding.

In the pre-carding and in the post-carding area of the cylinder, 10 special elements of the multi web clean system can be mounted in the most different combinations. The first and the last elements are fixed. The cleaning system consists of a mote knife with a hood under permanent suction. It separates dirt particles, seed coat fragments and dust particles. Carding segment consists of two clothing strips with one support twin top.