An Assignment on double chute feed system

A Presentation on double chute feed systemSubmitted To Mr. Khalilur Rahman

Lecturer in Textile Engineering Department.

Bangladesh University Of Business & Technology What is Carding?Carding is defined as the reduction of entangled mass of fibers to filmly web by working them between two closely spaced relatively moving surfaces clothed with sharp points.

Card feeding ?Card feeding is of two types:Lap Feed (Conventional)Chute feed (Modern) (a) Single chute feed system (b) Double chute feed system

The blow room machinery is linked to the cards by trunking and the opened cleaned cotton is conveyed by pneumatic means to each card this the principle of chute feed system.

Basic elements of chute feed system ?

01. Conveyer system.02. Proper control of air pressure.03. A mechanism to feed the material at uniform weight per unit length.04. A delivery system to feed material to card feed rollers.05. A sensing mechanism to keep a certain amount of material as reserve

Double chute feed system Chute Feed MeritsDirect automatic feed to card increases B/R working efficiency.

Elimination of Man power during scutcher operation.

Processing of rejected lap is avoided. Due to loose form of feeding of fibres trash particles can be removed easily during carding. Suitable for synthetic fibres of bulky in nature, avoiding

Advantages01. Irregularities due to lap licking in high humidity. 02. Elimination of irregularities due to double laps, lap splitting, lap piecing etc. 03. Reduction of 1% C.V in chute feed carding system. 04.Difficulty in removing of crushed foreign materials and trash during calendering is reduced. 05. High performance of carding due to high degree of openness of feed web.06. Labour requirement is less due to no lap transportation and lap change in cards Disadvantages1. Flock feeding is the only solution for high production cards.

2. Linear density of the web to the card is not as good as lap.

3. Installation is not flexible.

4. Auto leveler is a must , hence investment cost an maintenance cost is more.

Two Chute Feed SystemRaw material, delivered by afan between the UNIflex B60 and the chutes or by the UNIstore A78, travels via the transport duct, which extends over all integrated machines within aunit, into the reserve chutes (upper half of the chute) of the individual cards.

The feed roller, which seals the upper half of the chute, pushes the stock into the region of the opening roller, and this roller in turn plucks out fine tufts and discharges them into the actual feed chute (lower part).

electronic pressure switch ensures constant filling and density of material in the chute; this is obtained by adjusting the speed of the feed roll (above the opening roller).

The airflow in the chute continually carries the tufts to the zone in which the perforated sheet is currently least covered by fibers

Experimental ProcedureThe purpose of present work with the evaluation of yarn parameters of chute fed materials,

by means of standardization of setting parameters in various downstream processes ,

right from blow room to ring frame,

brought about by aerofed and conventional lap fed mechanism.

Various studies from cotton mixing to yarn have been made up.

DISCUSSION 1.From the productivity point of view chute feed spinning method is advantageous over lap feed.2. The flow of material althrough the C.F line is always more or less keeps a whirling turbulance of air.3. Technically speaking the primary leading hooks of the material may appear as a trailing hooks and vice-versa.4. Due to the tendency of all the fibrous materials to change its own direction of flow by means of different curvature of ducting of aero feed process.5. specially short floating immatured one, which may turn into a ball like formation, known as Nep.

CONCLUSION AND SUMMARY It may be stated that with this coarser variety the overall level of yarn quality dis improves. As long as quality values of yarn are concerned with B/R, scutcher line card system may possess an overall superior quality than compared to aero feed technologyThis is what we can bring out about the Double Chute Feed System. Thank You.. Submitted By,

Kazi Rakibul Hasan.Sharmin Chowdury.Tanzila Kalam.Intake: 5thSection: 01Group: FIds: 032, 037, 038