ginning and blowroom two marks question with answer

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1. Write down the process sequence of carded yarn production Input Process/machine Output Bale Blow room Lap Lap Carding m/c Carded Sliver Carded Sliver Drawing Drawn Sliver Drawn Sliver Roving Frame/Speed Roving Frame/Simplex Roving Ring frame Yarn Yarn Winding Cone/package 2. Write down the process sequence of combed yarn production Input Process/machine Output Bale Management Fibre Blow room Lap Lap Carding m/c Carded Sliver Carded Sliver Pre comb Drawing Drawn Sliver Drawn Sliver Lap former Mini Lap Mini Lap Combing Combed Sliver Combed Sliver Post comb drawing Drawn Sliver Drawn Sliver Simplex Roving Roving Ring frame Yarn Yarn winding cone 3. Write short note on Mixing & Blending Mixing : If different grade of same fibres are kept toget her, then it is called mixing Blending : When different fibres of same or different grades are kept toge ther,then it is called blending. 4. Mention various types of mixing Types of mixing : i) Volume mixing, ii) Weight mixing, iii) Hand stock mixing, iv) Bin mixing, v) Mixing by hopper,

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GINNING AND BLOW ROOM

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Page 1: Ginning and Blowroom Two Marks Question With Answer

1. Write down the process sequence of carded yarn productionInput Process/machine OutputBale Blow room LapLap Carding m/c Carded SliverCarded Sliver Drawing Drawn SliverDrawn Sliver Roving Frame/Speed Roving

Frame/SimplexRoving Ring frame Yarn

Yarn Winding Cone/package2. Write down the process sequence of combed yarn production

Input Process/machine OutputBale Management

Fibre Blow room LapLap Carding m/c Carded SliverCarded Sliver Pre comb Drawing Drawn SliverDrawn Sliver Lap former Mini LapMini Lap Combing Combed SliverCombed Sliver Post comb drawing Drawn SliverDrawn Sliver Simplex RovingRoving Ring frame YarnYarn winding cone

3. Write short note on Mixing & BlendingMixing  : If different grade of same fibres are kept together, then it is called mixing

Blending : When different fibres of same or different grades are kept together,then it is called blending. 4. Mention various types of mixing

Types of mixing :i) Volume mixing,ii) Weight mixing,iii) Hand stock mixing,iv) Bin mixing,v) Mixing by hopper,vi) Lap mixing,vii) Card mixing,viii) Sliver mixing,ix) Automatic mixing.

5. Why blending is important?Importance of blending –(a) Important of processing performance.(b) Development for newer usages.(c) Minimization of cost.(d) To give the req.characteristics to the end product.(e) Availability of stock.

Page 2: Ginning and Blowroom Two Marks Question With Answer

6. Mention different types of Blending operation Process stage of blending type :  Types of Blending operation

Blending type Process stage Bale mixing Before the blow room

Flock mixing Within the blow roomLap mixing Using doubling scutchers.Web mixing At the ribbon lap m/c, or the blending draw frame.Sliver mixing At the draw frame & sliver,Lap or the comber.

Fibre mixing At the card or Rotor spgn m/c.

Roving mixing At the ring spgn m/c.

7. Why mixing is important?a. Processing importance (speed, setting & productivity).b. End uses.c. Costing.

8. Describe various types of mixing(a) Volume mixing : Here, volumetric mixing is performed. Cotton fibres of different quality falls into the mixing   bin & the bins are filled in different volume by pneumatic air. Thus mixing is done.(b) Weight mixing : In weight mixing, different quality cotton fibres are weighted at first & then they are mixed in   different weight(gm).(c) Hand stack mixing  : This method is a old type of mixing. Normally used to produce higher count yarn. This  mixing is done entirely with the help of hand.(d) Bin mixing : In bin mixing, cotton flocks are transferred from the bale opener into pipe line. The pipe dia is 10” & it passes over the bins, Fibre flocks are delivered into the bins from the  delivery  boxes of the pipe placed in the pipe.(e)Lap mixing : In lap mixing, doublescutcher is used. One is breaker scutcher & another one is finisher scutcher. Different grade & different quality laps are produced in the breaker scutcher. Four lap stands are placed before the finisher scutcher. For feeding four laps. Therefore, mixing can be done different ratio, like.,1/3; 1/1; 3/1; 1/1/2; 2/1/1 or 1/1/1/1 etc. This method is still used successfully.(e) Automatic mixing : In this method, cotton fibres are mixed automatically by different automated m/cs without breaking bales manually. Here, the number of bales are placed both side of the m/c longitudinally. The m/c moves in traversing motion & extract the fibres from the bales into the duct for mixing. For example, unimix of Reiter.(f) Card mixing  : This mixing  is  sometime used  in  the high production carding, where two laps are fed & mixed together.(g) Sliver mixing : In this method, different carded slivers are used in a particularration by doubling to mix the fibres in draw frame.(h)  Mixing  by  hopper  : In  this method,  at  first  cotton  fibres  are  passed  into  the bale breaker from where the fibres falls on a lattice. A series of lattice take thecotton fibres of different quality into the mixing bins through a cross lattice. As aresult mixing of different quality cotton fibres are  performed.

9. What is the objects of blending?

Page 3: Ginning and Blowroom Two Marks Question With Answer

(a) Blending influences the reduction of the cost of the final product through blend composition,  availability of fibres quality & inherent fibre property variations.(b) It helps to improve processing performance of the following process –

(i) Carding : Blending influences the processing performance of carding through control of nep level variation, waste level variation, fly, roving twist variation, m/c adjustment, static electricity formation.

(ii) Spgn

 : Blending influences the processing performance of spgn through control of  yarn twist

variation, end breakage, m/c adjustment etc.(iii) Warping & weaving : Blending influences the processing performance of warping & weaving through control of end break m/c adjustment etc.(iv) Dyeing & finishing : Blending influences the behaviour of dyeing & finishing  through control of shrinkage variation, dyeing defects etc.

(c) Blending influences –(i) Physical properties  :  It  influences  to  increases  tensile &  tear  strength, elasticity, abrasion  resistance, stretch etc.(ii) Aesthetic properties : It influences to increase luster. Appearance, cover, color etc.(iii) Subjective properties : It increases comfort & the properties like handlings, touch, soft ness etc.

(d) It helps to meet function & end used requirements. (e) It helps to achieve effect by carrying color, fibre characteristics & so on.10. Write down the points should be considered during mixing and blending

(a) Similarity in fibre length.(b) Strength of fibre.(c) Similarity in colour of fibre.(d) Maturity of fibre.(e) Similarly of fibre.(f) Atmosphere in fineness of fibre.(g) Skilled labour.(h) Well equipped m/c to be used.

11. Differeniate between mixing & blending.

S. No

Blending Mixing

1Mixing of different fibres. e.g. p.c. blend; t.c. blend etc.

Mixing of same fibres.e.g. Mixing of American & Indian cotton.

2 Same properties of fibre are used in blending Different properties of fibre are used in mixing.

3 In blending, quality are not considered In mixing, quality of fibre are considered.

4In blending, fibres are blended indefinite proportion.

In mixing, quality of fibre are considered.

5All the characteristics of fibre are known in  this process.

All the characteristics of fibres are notcorrectly known in this process.

12. Define spinning.

Page 4: Ginning and Blowroom Two Marks Question With Answer

Spgn may be defined as the art or techniques to produce yarn by twisting of fibrous mtls or any  other

method from the fibre forming agents. Spgn is the first step in the textile manufacturing process for staple

artices. There are several spgn process (rotor spg

n, air jet spg

n, friction spg

n, dref spg

n etc)

depending upon the fibre used. However, the principle of spgn is the same.

13. What is Yarn?Yarn is an assembly of fibres that are twisted together to form a continuous strand. Yarns may be made  from either  staple  fibres or  filament  fibres. Staple  fibres  are twisted into yarns.

14. Write short note on “Blow Room”Blow   Room   :  Blow room consists of a number of m/cs used in succession to open & clean the cotton fibre to the required degree. 40 to 70% trash is removed in this section.A section in which the supplied compressed bales are opened, cleaned & blending or mixing to form uniform lap of specific length is called Blow room section. The cleaning efficiency of blow room is 60 to 65%. This is the first section of spinning line for spgn wt cotton yarn.

15. Mention the object of Blow room.1. To open the fibres.2. To clean the fibres.3. To produce sheet of lap for facilating the feed to the next process.

16. Enlist operations are operated in Blow room1.  Opening   :

a. To open the compressed bales of fibres &b. To make the cotton tuft a small size as far as possible.

2.  Cleaning   :  To remove the dirt, dust, broken seeds, broken leafs, stalks & other foreign materials from the fibres.3.  Blending   or   Mixing   :  To make good value of yarn & to decrease the production cost by mixing different grade of fibres.

4.  Lap   forming   : a. To transfer the opened and cleaned fibres into a sheet form of definite width & uniform unit length which is called lap.b. To roll the lap of predetermined length in a cylindrical shape around a lap pin.c. To transfer the lap from the lap pin to a rod to suitable handle & feed it to subsequence processing carding m/c.

17. Give the details for Action in Blow room.1.  Action   of   opposite   spike   :  (Opening)The action of opposite spikes is opening the cotton fibre. By this action, the large pieces of  cottons have been reduced in size.2.  Action   of   Air   current   :  (Transfer + cleaning)During processing, the movement of cotton from m/cs to m/c is done by air current. It is also helps the separation of lint & trash.3.  Action   of   Beaters   :  (Cleaning & opening)Beaters are responsible for removing almost all of the impurity extracted in the blow room.  Beater also helps in opening of cotton fibre.4.  Action   of   regulation   motion   :  (Uniform output)

Page 5: Ginning and Blowroom Two Marks Question With Answer

The action of regulation motion gives the uniform output of cotton fibre by the help of swing door & swing paddle.Electrical photocell.

 Air pressure system.18. What are the function of Blow room?

(a) Feeding,(b) Beating/opening(c) Transporting/transferring,(d) Lap sheet formation.

19. Mention the m/cs are used for opening in Blow room.Conventional bale opener –(a) Multiple Bale opener (Hergeth mixer)(b) Automatic Bale opener (Blandomar)  Troztlerco.(c) Unifloc  Retier.

20. What are beating or cleaning points in Blow room? (a) Ultracleaner/stepcleaner/super cleaner. (b) Axiflow cleaner. (c) Saw toothed beater. (d) Bladed beater. (e) Porcupine beater. (f) Mono cylinder. (g) Multimixer. (h) Krischner beater. (i) Twin opener. (j) Vertical opener. (k) E. R. M. cleaner.21. Mention opening devices are used in B/R

(a) Roller → Small diameter. i.e. Step cleaner.(b) Drums → Larger diameter. i.e. Mono cylinder.(c) Multiple beater → Two or three arms. i.e. Krischner beater.(d) Spiked lattice → Endless belt. (very gentle opening).

22. What do you mean by Major & Minor beating point?When we use a beater to clean fibre then it is called major beating point. e.g.Stepcleaner, Porcupine beater, Krischner beater etc. But when we use a beater to open the fibre, but some cleaning is occurred then it is called minor beating. e.g. Bale plucker, Bale opener, Saw toothed beater, condenser etc.

23. Which m/cs are used for coarse & fine cleaning.For coarse cleaning:

1. Step cleaner/Ultra cleaner/Super cleaner.2. The dual roller cleaner/Axiflow cleaner.3. The monocylinder cleaner.

For Fine cleaning:1. RN cleaner2. E.R. cleaner.

24. Write down some devices which are used in feed regulation motion.The following devices are used in feed regulation motion. these are used for controlling feed mtl –

Swing   paddle   :  Swing paddle is used in Bale process.Swing   door   :  It is used in Hopper feeder & acts as feed regulating.Paddle   lever   :  It is used in porcupine beater for feed regulatingPiano   feed   regulator   :  It is used in scutcher for feed regulating.

Page 6: Ginning and Blowroom Two Marks Question With Answer

25. Mention the std. lap specificationLap length  → 60 yds.Lap weight  → 40-50 lbs.Lap wt/yd → 12 to 16 oz -1lbLap wt. variation → 3%(acceptable.)Lap hank/count  → 0.0012-0.0018Lap width  → 40-42 inch.Mechanical draft → 2.5-4Relative humidity → 55%Efficiency →70-80%

26. Short note on – Air Flow system1. To transfer the cotton fibres.2. To remove foreign mtl from cotton fibres.

27. Mention the std. lap specification.1.Slotted   sheets   &   perforated   sheets:  Both are formerly placed under cards & used to a steady  decreasing extent.

2.Triangular   section   bars:  These are robust east to maintain & give a good cleaning effect.3.Angled   bars:  These are somewhat less robust & can tend to create blockages.4.Blades:  Blades have been used as grid elements for a long time, almost always in combination with triangular.