Yarn Production Technology Questions
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- Yarn Production Technology Questions writer Faik Keserby %AM, 03% 273% 2017 08%:%May in Lesson Questions Read 5713 times
Q.1.What is Blend in Spinning?
C.1. The process of mixing homogeneously by bringing together different types and characteristics of raw materials (fibers) is called blending.
Q.2. What are the purposes of the blending process?
C.2. The purposes of the blending process:
1-Mixing different types and qualities of fibers
2-Mixing different types of raw materials
3-Opening large fiber masses in thin tufts
4-To clean the foreign materials in the fiber
Q.3. What are the benefits of the blending process?
C.3. Benefits of the blending process:
1- It helps the product to provide the required and expected features. Example: Mixture of artificial and natural fibers for ease of maintenance
2-It balances the variation of the properties of the raw material.
3- It helps to reduce the cost of raw material.
4-It provides an advantage in improving the efficiency throughout the production process. For example; Long staple fibers added to the blend during the processing of short staple material act as carriers and increase efficiency and quality.
Q4. For what reasons are blending and threshing machines made in cotton and wool spinning different?
C.4. Blending and threshing machines made in cotton and wool spinning differ from each other. Because the physical and chemical properties of the fibers, besides their general properties, they also have unique properties. In addition, the chemical substances they contain are also different from each other.
Q.5. In how many groups are cotton spinning blowroom and machines examined, write in articles?
C.5.Cotton spinning blowroom and machines can be divided into three groups:
1- Placing the bales in the threshing according to the threshing recipe
2-Machines used in opening bales
3-Opening and cleaning machines
Q.6. Tell us how the bales are placed in the threshing according to the threshing recipe.
C.6.Bales are placed around the threshing machine according to the threshing recipe prepared in advance depending on the properties of the yarn to be made. The circles around the bales taken into the blowroom circle are cut and the cross-stitch is removed.
Q.7. What are the operating conditions (temperature, humidity, time) of cotton in bales?
C.7. Air Conditioning: At 20 – 24 ºC Humidity: 50-65% Duration: 24–48 hours
Q.8. What is the purpose of providing the operating conditions of cotton in bales?
C.8. It is the fact that the cotton masses that are compressed due to the press during baling open and swell and have the desired climate conditions.
Q9. What operations are performed after the operating conditions of cotton in bales are met?
C.9.After the bales gain the desired properties, opening and cleaning operations are performed with the bale opening machine.
Q.10.Which properties of the wool fiber are taken into account and blended according to the yarn properties to be obtained?
C.10. Wool fiber is blended according to the yarn properties to be obtained by considering factors such as fineness, length, color, price and pollution.
Q.11. At what stages does the blending occur in worsted spinning?
C.11. 1-Before washing
2-Before combing clean wool
3-Before combing and pulling tape
4-In tops
5-In suppository
Q.12.What are the purposes of lubricating wool?
C.12, 1-To prevent breakage by increasing the flexibility of the fiber during opening, carding, drawing, carding and spinning processes.
2-Reducing dusting and flying.
3-Avoid spillage.
4-Reducing friction between fibers; to allow the fibers to slide easily but controlled over each other during the drawing, rubbing and spinning processes.
5-To provide thinner yarn spinning by adding slipperiness to the wool.
6-To prevent static electricity.
Q.13. What are the duties of the hallaç machine?
C.13.1-Opening the wool fiber as much as possible, separating it from each other and adding volume
2-To clean the foreign materials in the opened fiber
3- To ensure that the fibers are mixed homogeneously
4- Lubricating the fiber at the exit from the machine
Q.14. Tell us about blending in Strayhgarn spinning?
C.14. Blending in Strayhgarn spinning: Blending in Strayhgarn yarn production is usually done before carding. Depending on the characteristics of the fiber used, blending can be done before washing and in the form of clean wool. Blending is very important as a wide variety of raw materials with different properties are used in Strayhgarn spinning. Depending on the quality of the yarn to be made, short and coarse wools, wastes from worsted spinning, and wools obtained from a wide variety of new, old fabrics and knitwear can be used.
Q.15. What do you call a qualified person who has the knowledge and skills to buy various fiber groups and make yarn with the desired number and quality in the machines?
A) Weaver B) Painter C) Spinner D) Knitter
Q.16. Which of the following is among the duties of spinners?
A) Doing the washing process B) Carrying out the drying process C) Doing the dyeing process D) Blending the fiber
Q.17. Which of the following is the operation done in the thread circle?
A) combing the fiber B) washing the fiber C) drying the fiber D) dyeing the fiber
Q.18. What are the qualities sought in a person who wants to work as a spinner?
A) To be mentally unhealthy B) To be able to use eyes and hands in coordination C) To have low dexterity D) To be able to paint
Q.19. Which of the following can be defined as the combination of natural or synthetic fibers twisted or untwisted parallel to each other after a series of processes and thus gaining strength?
A) Yarn B) Fabric C) Fiber D) Fiber
Q.20. Which of the following shows the classification of spinning according to the raw material used?
A) Cotton spinning - Combed cotton spinning - Man-made and synthetic spinning B) Worsted spinning - Wool spinning - Artificial and synthetic spinning C) Cotton spinning - Wool spinning - woolen spinning D) Cotton spinning - Wool spinning - Artificial and synthetic spinning
Q.21. What is it called when a herbal textile product is embossed and unfolded in enterprises, it is purified from foreign materials (dust, soil, bark, seed, etc.) to a large extent, and it becomes a strip by combing and it is turned into yarn by giving the desired twist after being drawn to the desired fineness?
A) wool spinning B) cotton spinning C) silk spinning D) synthetic spinning
P.22. What is it called when wool, which is an animal textile product, is fluffed and unfolded in enterprises, cleaned from foreign materials (dust, garbage, velcro, etc.) to a large extent and turned into a strip after being drawn to the desired fineness, and then turned into yarn by giving the desired twist?
A) wool spinning B) cotton spinning C) linen spinning D) synthetic spinning
P.23. What is yarn called that consists of one or more continuous fibers along the entire length of the yarn?
A) wool spinning B) cotton spinning C) linen spinning D) filament spinning
Q.24. What is the process of mixing homogeneously by bringing together different types and characteristics of raw materials?
A) Fabric B) Coil C) Blend D) Dyeing
Q.25.What does blend mean?
C.25. The process of homogeneously mixing by bringing together different types and characteristics of raw materials is called blending.
Q.26. What is the name of the machine that makes cotton blending?
C.26. Threshing machine
P.27. What is the name of the machine that threshes wool?
C.27.Hallaç machine
P.28. Cotton spinning blowroom and machines are examined in three groups and what are they?
C.28.A-Placing the bales in the threshing according to the threshing recipe
B-Machines used in opening bales
C-Opening and cleaning machines
P.29. What is the task of the Unifloc machine?
C.29. It is the first machine to feed baled cotton in modern blowrooms. These machines replace bale opening machines in today's spinning mills. Bale plucking machine is a machine that provides a uniform (homogeneous) mixture by plucking the fibers from a certain number of bales in small tufts.
P.30. What is the function of the machines used in opening the bales?
C.30. It is the process of opening and mixing different or same origin bales by machines. The aim is to eliminate the differences between fiber groups.
Q.31. What are the opening and cleaning machines?
C.31. A-Mono (single) roller opener
B- ERM opener machine
P.32. What does opening (forging)-clearing and condensing mean?
C.32.It is the process of opening cotton groups in tufts by mechanical methods and separating the foreign materials in them. At the end of this process, a lap form is formed or a structure similar to this form is added to the fiber groups (For example, condensation at the end of pellet feeding). Due to the environment in which cotton fiber is grown, it may contain substances such as dust, garbage and seed shells. Their cleaning takes place in opening and cleaning machines.
P.33. What is the duty of a mono (single) cylinder opener?
C.33. Mono roller opener is an effective cleaning and dust separating machine used right after the automatic bale opener (blendomat, unifloc).
P.34. What is the task of the ERM opener machine?
C.34. ERM opener (uniflex-rieter) is a fine cleaner for natural fibers
P.35. Tell us about the Unimix threshing machine?
C.35. The material is fed into eight silos simultaneously and uniformly. The dust in the carrier air is systematically separated from the fiber and delivered to the filter unit. This integrated dust removal method is very effective and reduces yarn breaks in spinning machines. It consists of three parts as storage, middle and exit parts. The fiber tufts are fed pneumatically from the feed chute to the machine, into eight mixing chambers. Mixture as many as the number of feeding chambers is provided on a conveyor belt and fed to the needle mat. The excess material on the needle mat is poured into the mixing chamber by the roller and the threshing effect is increased. The mixing chamber is controlled by an optical probe and the fill rate is adjusted. The fiber tufts remaining on the mat are taken by the receiving cylinder and conveyed to the next machine by the pneumatic conveyor system. Better mixing of the fiber is ensured by connecting them one after the other in the blending machines.
P.36. Tell us about the fine cleaning (cleanomat) machine?
Feeding a cleaner of the C.36.Cleanomat system by multiple mixers gives very positive results. The multi-mixer provides the cleaner with an ideal and homogeneous lap. In order to fully adapt to the raw material, there are 1-4 opening and cleaning rollers in this system. In the Cleanomat series, there are 2 scraper blades under the first roller, a fixed scanning plate after the first blade, and 1 scraper blade under each roller, a suction head and a guide blade in front of it. It is known that the trash separated from the cotton in the grid system is sucked back into the corner of the grid. This error has been completely corrected in the direct suction system. Waste and dust separated from the cotton are instantly absorbed by the suction air and removed from the system. The direction of the guide vane can be adjusted as desired against the blade direction. In this way, the amount of waste produced can be determined. Although the selection and positioning of these rollers and thus the clothings depends on the quality of the cotton used, according to the basic rule of the opening principle, according to the raw material flow direction, rollers with coarse clothing take place first, and rollers with fine clothing after.
P.37. Tell us about the dust extraction machine (dustex) machine?
C.37. If the cotton is opened very well, the dust inside is removed. That's why dustex; It should be used after the delicate opener and before the comb. Dustex is fed and sucked by a fan. Dustex is of particular importance in OE spinning mills. Micro-dust, which collects in the rotor cavities and causes yarn breaks and yarn defects in the form of thick places, can be sucked in this machine. Coarse and fine dust in cotton can only be removed after the cotton has been well opened. Therefore, the dust extractor is used in the cleaning line after the fine opener, ie just before the carding machine. As the fibers pass through the channels or during operation, the dust contained in the fiber elements is removed by suction with air suction. The fiber coming out from here passes through metal separators before coming to the card. The material passes in front of a metal detector. In previous processes, the metal remaining fiber is dropped into another chamber. The separation of metals in the fiber prevents the possibility of fire and damage to the wires, especially in the card.
P.38. Tell us about the pellet feeding machine?
C.38. The cleaned and opened fibers in the fine cleaning machine reach the continuous fiber feeder machine integrated into the carding machine through the air duct. The task of the fiber feeding machine is to feed a fixed amount of fiber to the carding machine. In the new machine systems, by integrating the fiber feeding machine into the carding machine, it functions the same as the output roller assembly of the feeding table and the feeding roller of the carding machine. The fibers coming from the transport channels are filled into the upper chamber used as a reserve; then the air between the fibers is sucked in with the help of the grids in the narrow reserved channel; the fibers condense and move towards the feed roller. The feeding roller compresses the material by means of the spring elements on the feeding table and turns it into a fiber layer of certain thickness. Immediately afterwards, the material in the form of layers is delivered to the opening roller and the opening process is started. The opened fibers pass through the second silo and before the wadding is formed in the second chamber, the air separation between the fibers is performed again. The opened fibers are then condensed in the form of laps thanks to the feeding table moving with a spring. Thanks to the measuring arm connected to the spring elements on the feeding table, mass deviations that may occur in the lap are controlled. If, as a result of the control, a value different from the reference value is detected in the lap thickness, it is automatically regulated. The system is also equipped with a mechanism that will detect the metal parts that can be seen on the case and cause damage to the carding machine and make the machine stop. from the machine to the feed roller of the card.
Q.39. What are the Duties of Carding Machines?
C.39. Duties of Carding Machines:
1- Opening the fiber until it becomes a single fiber
2-Separating foreign matter and fine dust
3- Separating short fibers, especially neps-nopes (knots)
4- To parallelize the fibers and give them a longitudinal direction.
5-Increasing the blending by ensuring the blending of the fiber
6- Bringing the fibers into band form and stacking them in buckets
7-To obtain a tape with equal thickness and smoothness at every point at the exit of the machine and stack it in buckets.
P.40. The wool carding machines used in the wool spinning system are divided by fiber length, what are they?
C.40. It is divided into two: 1-Worsted or semi-worsted carding machine 2-Strayhgarn carding machine.
P.41. What are the parts of the carding machine?
C.41. Parts of the carding machine
1-Feed part
2-Pre-opening (avantren device) and hook and loop removal (Morel device)
3-Main comb part (large drum clothing opener)
4-Output part (tape acquisition)
P.42. What is the purpose of making Cer Band?
C.42. The slivers from the card come to the draw frame. The thickness (diameter) of the bands is not the same everywhere. There are thin and thick places that follow each other along the band. In the draw frame, removing the unevenness of the belt is only possible by combining (dubbing) 6-8 belts together. Thus, it is seen that the unevenness is largely eliminated by replacing the thick places of some bands and the thin places of others. Bands thickened by dubbing are thinned by applying traction (6-8). Normally the mechanical drafting rate is kept close to the number of draw frames fed, as there is a limitation to the fineness that a sliver can be drawn.
Q.43- What are the Duties of Draw Frame Machines?
C.43.
a- Thinning the bands taken from the comb by paralleling and pulling
b- Ensuring the homogeneity and smoothness of the mixture by dubbing
c-To ensure that the hooks at the fiber ends are opened in order to make the combing process healthier.
obtaining d-Band.
Q.44- What is the purpose of making tension tape in wool spinning? Tell me?
C.44. Pulling tape has an important place in wool spinning. For this reason, the number of folding (dubbing) becomes directly important. This also plays a big role in the unevenness. With the bands obtained from the wool card, the process applied to give more direction to the fiber, to straighten the fibers and to facilitate combing, to balance and smooth the weights of the bands per unit length, to obtain bands of certain thickness, and the machines used for this purpose are called drawing machines. Each applied drawing is also called a passage. The bands coming out of the carding machine are fed to the drawing machines as tops or with buckets; those coming from the carding machine are fed by buckets.
P.45. What is the function of drawing machines in Wool Spinning?
C.45.
a) Reducing number deviations by minimizing unevenness by bringing together the thin and thick parts of the bands fed randomly with the help of folding (dubbing)
b ) Bringing together more than one band with the help of folding and ensuring that the mixture becomes homogeneous.
c) To provide the mixture by bringing together different types and colors of fiber bands with the help of folding.
ç) Opening the fiber hooks in both directions by passing the fiber through at least two drafting machines.
d ) To thin the bands at every stage with the help of drawing
e ) To obtain a band.
P.46. In how many parts is the Laboratory Drawing Machine examined? What are their names?
C.46. It is analyzed in three parts. These;
a- ) Feeding part
b- ) Shooting part
c- ) Winding part
P.47. What is the other name of Roving in cotton spinning?
C.47. Roving in cotton spinning is also called flayer.
Q.48-What is the Flayer Machine?
C.48. Since it is not possible to feed the yarn machine as a band from the draw frame (except for the OE spinning system), the bands need to be thinned a little more. The machines that bring the bands into a form that can be processed on the spinning machine are called flayer machines.
Q.49.-Which machine is the Roving Ribbon obtained from?
C.49. Since it is not possible to feed the yarn machine as a band from the draw frame (except for the OE spinning system), the bands need to be thinned a little more. The product obtained from the flayer machine, which brings the bands to a form that can be processed in the spinning machine, is called roving strip.
Q.50- What are the functions of the Flayer Machine?
C.50.
a) Thinning the drawstring band and turning it into a roving with the drawing process
b ) Reinforcing the roving with twisting
c) Wrapping the roving in bobbins and bringing it into a form suitable for spinning on the ring spinning machine
S.51. In the winding part of the roving ( Flayer ) machine;
a) What is the function of the car?
b ) What is the function of spindles?
c) What is the function of the butterfly?
d ) What is the function of the Pressure Finger ( Claw ) ?
C.51.
a) It is the part that carries the spindles and the butterfly on it. It moves up and down. In order to make a complete coil winding and to ensure the conicality in the coil, the stroke movement of the car decreases a little at each revolution. Along with the course length, the car speed should decrease in the same proportion. These operations are provided by the switch (lock) device.
b ) Working with the butterfly, it wraps the wicks on the wick pen.
c) It is the element that gives the wick to the wick pen properly.
d ) Winding is done properly with the guide part at the appropriate tension.
P.52. What is the other name of Roving in wool spinning?
C.52. In wool spinning, roving is also called finisher.
P.53. What is the Purpose of Making a Roving (Finisher)?
C.53. Since the feeding machine cannot be fed to the yarn machine as a tape from the drawing machines, the tapes should be thinned a little more. The machines that bring the bands into a form that can be processed in the spinning machine are called roving (finisor) machines, and the obtained one is called roving tape. The main difference of these machines is that Butterfly twisting is used to give strength to the roving in the flayer machine, while the rubbing Technique is used to give strength in the finisher machine. In the flayer, a wick is wound into a pen. In the finisher machine, two rovings are wound into a pen. In worsted and semi-worsted wool spinning, there is a roving process before spinning. In Strayhgarn spinning, there is no roving machine and roving is obtained at the exit of the carding machine.
P.54. What is a roving (finiser) machine?
C.54. Since it is not possible to feed the yarn machine as a band from the drawing machines, the bands need to be thinned a little more. These are the machines that pull the bands into a form that can be processed in the spinning machine.
P.55. What technique is used to give strength to the roving in the flayer machine?
C.55. Butterfly twisting techniques are used.
P.56. Which technique is used to give strength in the finisher machine?
C.56.rubbing technique is used.
Q.57.What is ring spinning machine?
C.57. Ring spinning machine is also called ring spinning machine. In the yarn production line It is the machine from which the yarn is obtained.
Q.58.What is the purpose of spinning?
C.58. Use of spinnable textile fibers (vegetable fibres, animal fibres, chemical fibres) instead, it is obtained on the spinning machine with suitable properties.
Q.59.What are the functions of the spinning machine?
C.59. Thinning the wick strip by pulling it up to the desired number,
To give strength by twisting the drawn fiber cluster,
To obtain cops by winding the yarn on the bobbin with the help of the winding device.
Q.60- How many parts does the spinning machine consist of, what are their names?
C.60. The spinning machine consists of three parts.
Feed
shooting part
Twist part
Q.61.What are the parts of the ring spinning machine?
C.61.
Roving Coil
Wick Hanger
Roving Strip
Roving Guide
Shooting Zone
Twist Zone
Thread Cop
Winding Assembly
P.62. What is the function of the feed part in the ring spinning machine?
C.62. The feeding part is where the roving balls are attached to the wick hangers in the creel. The task of this part is to hang the ball of the roving to be thinned by drafting and to direct the roving towards the drafting cylinders by means of guides.
S.63. What is the function of the drafting part in the ring spinning machine?
C.63. The task of the drafting system in the spinning machine is to thin the roving sliver by pulling at the desired rates (reducing the number of fibers in the cross section) and to make the fiber cluster ready for twisting.
The drafting process takes place due to the speed difference between the roller pairs. Cylinder speeds increase from inlet to outlet. There are three draft rollers and three pressure rollers in this part. The draft rollers are metal and grooved. The printing rollers are rubber-coated and take their movement from the drafting rollers. There is a sleeve on the printing cylinder in the middle. The sleeves provide better opening and pulling of the fiber. Between the middle (second) roller and the delivery roller, there is a felt-covered roller that catches and cleans the fiber fly.
S.64.What is the function of the twist part in the ring spinning machine?
C.64-Twisting should be given in order to give strength to the thinned fiber cluster. This is done by the twisting process. twist, These are the spiral rotations given to the yarn to hold the fibers together and to gain strength. twisting process, ring spinning machine takes place in the distance between the delivery roller and the spindle, by the rotation of the traveler around the ring. One end of the fiber mass, which is held in the last draft roller pair, rotates around the ring with the help of the other end of the traveler. Thus, the fiber mass, one end of which is fixed and the other end rotates, receives a twist with one revolution of the traveler around the ring.
S.65. What is the function of the winding part in the ring spinning machine?
C.65. The fiber mass in the roving sliver is drawn and thinned at the desired rates in the spinning machine, it is twisted so that the fibers can stay together without scattering, and a yarn is formed. The resulting thread should also be wound on thread pens. The machine elements that enable the formation of the cop by winding the yarn on the pens are the spindle, traveler, ring and ring link (carriage) assembly.
P.66. What is a spindle in a ring spinning machine and what is its function?
C.66.It is the element on which the thread spool is attached and which rotates at a certain speed. The spindles rotate the yarn at 7000-20000 revolutions per minute with the bobbins placed on it. sIt performs unwinding and twisting before winding.
P.67. What is the traveler and its function in the ring spinning machine?
C.67. In the ring spinning machine, the tension on the yarn, which the yarn passes through while winding on the bobbin, It is a steel or plastic material that gives off, twists with the spindle and takes its movement from the yarn. The J type traveler is used in wool spinning, while the C type traveler is used in cotton spinning. is used. The friction between the ring and the traveler leaves the traveler 1–2% behind the spindle speed.
Q.68.Which condition is required for winding the yarn on the ring spinning machine?
C.68. The spindle speed should be higher than the traveler speed.
Q.69.How is the thread not wound on the bobbin on the ring spinning machine?
C.69. If the spindle speed and the traveler speed were equal, there would be no winding.
P.70. What is the function of the car (ring) in the ring spinning machine?
C.70.Let the twisted yarn break by placing it on the bobbin in a regular manner. allows to form.
S.71. What is the function of the balloon control ring in the ring spinning machine?
C.71. Balloon control collars reduce the tension in the yarn and divide the yarn balloon into two. Thus, the traveler speed is increased.
P.72. What is the function of the pigtail (yarn guide) in the ring spinning machine?
C.72.The pigtail guide located on the balloon breaker collar, tightens the thread tension from the top. It reduces by limiting and ensures that the yarn is centered on the spindle axis during winding.
S.73. What is the function of the balloon separator plates (separator) in the ring spinning machine?
C.73.Separators are plates that keep yarn balloons apart from each other.
S.74. What are bobbins and cops in a ring spinning machine?
C.74. The yarn boss on which the yarn spun on the ring spinning machine is wound is called bobbin, and the bobbin on which the thread is wound is called cops.
S.75. What is a bracelet on a ring spinning machine?
C.75.The ring is the element made of hard steel that forms the return path of the traveler. Rings are the basic element of the machine, while travelers are consumable. Wool Due to the brittleness of wool, oily bracelets are used in spinning.
Q.76. Why was the open-end system needed?
C.76.It is a spinning method that is needed as an alternative because of the limited production speed in the ring spinning method.
Q.77. How many yarn counts are produced in the open-end system?
C.77. On open-end spinning machine, from 12 tex to 150 tex (Nm 85, Ne 4 to Ne 50) yarn is obtained.
Q.78. What is the basic principle in Open-End spinning system?
C.78.The basic principle in open-end spinning machines is to separate the fiber group as a single fiber. then it is to collect it again in a regular way and bring it to the form of yarn.
P.79. Which stage is not present in the ring spinning system in the Open-End spinning system?
C.79. Roving stage in ring spinning system They do not.
Q.80. Explain 4 of the differences between Open End Yarn and Ring Yarn?
C.80.
1-The production speed in Open-End spinning is higher than in Ring spinning systems. This is a factor that reduces costs while increasing production.
2-The process stages in Open-End spinning are shorter than in Ring spinning. This is one of the cost-reducing factors.
The yarn produced in the 3-Open-End system is more voluminous, more elastic, more absorbent and less hairy than Ring yarn. Handle is also good if not too high twist. A good absorbency feature ensures a high percentage of sizing and brighter tones.
4-The properties of the yarn produced in the Open-End system are less variable than the Ring yarn. Fineness, unevenness, durability etc. vary less throughout the yarn.
5-According to the process, the cross section of Open-End yarns must have an average of 70-100 fibers. This is why Open-End yarns cannot be produced in fine counts as Ring yarns (requires 50-70 fibers in the cross section).
For example, although Ne40 yarn can be made theoretically in the Open-End system, in practice Ne30 yarn cannot be exceeded.
A technological disadvantage of 6-Open-End spinning is the helical fibers formed on the yarn surface. When the spun yarn is fed into the rotor cavity, some of the fibers are wound on the surface of the yarn in the twist direction. We can use this feature to separate Open-End yarns from Ring yarns. When we try to open the yarn with our two thumbs in the opposite direction of the twist, we can notice that the Ring yarns are untwisted and the fibers come out, but on the surface of Open-End yarns, the spiral fibers mentioned above do not allow the yarn to untwist and we see that the yarn remains twisted.
The strength of 7-Open-End yarns is 15-20% lower than Ring yarns. Strength can be increased by increasing the twist more. But this causes the attitude to harden.
8-Open-End yarns are mostly short fiber yarns.
9-Open-End yarns are generally used in the production of many products that do not require very high strength. Its usage area is expanding day by day. Technologically, Open-End yarns can be used as weft and warp yarns in weaving. It is more uniform, less thin, elastic and has higher abrasion resistance, which is advantageous for use in warp compared to ring yarns. Due to the good absorbency, they are also sized well. As a weft yarn, its uniformity and friction resistance provide advantages for Open-End yarns. Open-End yarns can also be used in the production of knitted fabrics. Due to the voluminous nature of Open-End yarns, it is extremely suitable to be produced as hand and machine yarn. However, the low strength of Open-End yarns shows itself as a negative effect.
Q.81.What does coiling mean?
C.81. Winding the yarns under a uniform tension on the bobbin boss and making them suitable for further processing is called winding.
Q.82.What is bobbin machine?
C.82. The machine that wraps the yarns under a uniform tension on the bobbin boss and makes them suitable for further processing is called the Coil Machine.
Q.83.How much does the cops weigh?
C.83. 100 to 150 grams.
Q.84.What is the way of winding the thread on the bobbin?
C.84. The yarn is wound crosswise on the bobbin.
Q.85.How many kg is the yarn wound on the bobbin?
C.85. It is 2,5-3 kg.
P.86. What are the Duties of the Coil Machine?
C.86.
a) Winding the yarns taken as bobbins in the ring spinning machine into bobbins longer than the bobbin
b) To eliminate yarn Irregularities (neps, fish, knots, thickness and fineness, etc.) that may cause weaving and knitting errors and breaks in machines.
c) For yarns to be dyed as bobbins, winding in perforated dye bobbins that will allow the dye to spread easily on the thread.
d) Twist distribution is not uniform since the twist is given in a short distance in the ring spinning machine. Smoothing the twist distribution when passing the yarn from the cop to the bobbin
P.87. Coil Machines eyebrow types and what are they?
C.87. It is of two kinds. 1-Full automatic. 2-semi-automatic.
P.88. What is the purpose of waxing the yarn on the bobbin machine?
C.88.The surface of the yarn is waxed during winding in order to increase the lubricity of the yarn, especially when the yarns with little twist to be used in knitting machine pass through the machine parts of the knitting machine. An apparatus has been added to the winding machine for this process. After the yarn leaves the cop and passes through the other bobbin elements, it enters the paraffin cabinet and contacts the paraffin. The hardness of the paraffin, the pressing power of the paraffin apparatus remain on the paraffin yarn at a rate that varies according to the ambient temperature.
Q.89.What are the differences between a fully automatic winder and a semi-automatic winder?
C.89. The working principle of the semi-automatic winding machine is the same with the fully automatic winding machine, except for the bobbin feeding and bobbin change. The bobbins are brought to the semi-automatic bobbin machine with bucket trolleys and the yarn ends are separated into the magazines and fed by the workers. The insertion of empty bobbins and the removal of full bobbins are also done by the workers.
Q.90. What are the errors that can be corrected by winding the yarn?
C.90.
1-thin-thick place in the yarn: The thick places in the yarn are the less twisted places. Thick places reduce the strength of the yarn and cause breaks in weaving. Thin places are the places where the fiber is low in the yarn. It causes breaks and fabric defects.
2- Knot in the yarn: Knots on the yarn can be of different sizes. Warp threads with knots do not pass through the lamellas, they break. In knitting, it causes needle breakage.
3-Piecing errors: Piecing errors occur because the end taken from the non-spun part during breakage in the yarn machine is placed under the yarn delivery cylinder together with the other end and shipped.
4-Fly winding flies: These are the errors that occur when the flies in the spinning mill are wound on the thread.
5-Vegetable and animal wastes: Vegetable and animal wastes are residues that can reach from bale to yarn. It causes errors during weaving.
6-Double thread defect: It occurs when two threads coming out of the last take-up cylinder in the spinning machine are twisted and wound on a spindle. It creates particularly significant surface defects.
P.91. What is the purpose of twisting?
C.91. Twist; It is made to increase the strength of the yarns (flat twist) or to gain different characters (fancy twist).
Q.92. What is the twisting machine?
C.92. In general, the machines in which the twisting process is performed are called twisting machines.
Q.93. What are the functions of the ring folding and twisting machine?
C.93.
a-To increase the durability of the yarn, b-To obtain thicker yarn. c-To obtain yarn with different properties. d-Obtaining mixed color (fantasy etc.) yarn.
To hold together the fibers that make up the e-yarn. f-To prevent the yarn from feathering. g-Obtaining more durable and strong yarn. h-Obtaining ready-to-weave yarn.
Q.94. What are the tasks of the Volkman twisting machine?
C.94.
1- Giving two twists to the yarn in each revolution of the yarn
2- To gain strength by twisting the yarns from different bobbins
3- It is to wind the twisted yarns at constant tension and in the form of long-length bobbins.
Pre-folding the threads increases efficiency on this machine.
Q.95.What are the functions of the folding machine?
C.95.
1-Preparing the single yarns to be twisted on a bobbin at the same tension for the twisting machine
2-If the threads are not cleaned before folding, they must be passed through the filtering device to clean the faulty parts.
3-It is to provide ease of operation in all subsequent processes by wrapping in coil form and long-length.
Q.96. What is the difference between ply twisting machines and folding machines?
C.96. The difference between folded twisting machines and folding machines; the presence of twisting devices in the twisting machines and the twisting of the yarn in addition to the folding process.
P.97. The yarns seen below are wrapped on a textile material according to a certain technique. Can you write their names?
C.97.
- Yarn Production Technology Questions 2 writer Faik Keserby %AM, 03% 406% 2017 11%:%May in Lesson Questions Read 3257 times
Q.81.What does coiling mean?
C.81. Winding the yarns under a uniform tension on the bobbin boss and making them suitable for further processing is called winding.
Q.82.What is bobbin machine?
C.82. The machine that wraps the yarns under a uniform tension on the bobbin boss and makes them suitable for further processing is called the Coil Machine.
Q.83.How much does the cops weigh?
C.83. 100 to 150 grams.
Q.84.What is the way of winding the thread on the bobbin?
C.84. The yarn is wound crosswise on the bobbin.
Q.85.How many kg is the yarn wound on the bobbin?
C.85. It is 2,5-3 kg.
P.86. What are the Duties of the Coil Machine?
C.86.
a) Winding the yarns taken as bobbins in the ring spinning machine into bobbins longer than the bobbin
b) To eliminate yarn Irregularities (neps, fish, knots, thickness and fineness, etc.) that may cause weaving and knitting errors and breaks in machines.
c) For yarns to be dyed as bobbins, winding in perforated dye bobbins that will allow the dye to spread easily on the thread.
d) Twist distribution is not uniform since the twist is given in a short distance in the ring spinning machine. Smoothing the twist distribution when passing the yarn from the cop to the bobbin
P.87. Coil Machines eyebrow types and what are they?
C.87. It is of two kinds. 1-Full automatic. 2-semi-automatic.
P.88. What is the purpose of waxing the yarn on the bobbin machine?
C.88.The surface of the yarn is waxed during winding in order to increase the lubricity of the yarn, especially when the yarns with little twist to be used in knitting machine pass through the machine parts of the knitting machine. An apparatus has been added to the winding machine for this process. After the yarn leaves the cop and passes through the other bobbin elements, it enters the paraffin cabinet and contacts the paraffin. The hardness of the paraffin, the pressing power of the paraffin apparatus remain on the paraffin yarn at a rate that varies according to the ambient temperature.
Q.89.What are the differences between a fully automatic winder and a semi-automatic winder?
C.89. The working principle of the semi-automatic winding machine is the same with the fully automatic winding machine, except for the bobbin feeding and bobbin change. The bobbins are brought to the semi-automatic bobbin machine with bucket trolleys and the yarn ends are separated into the magazines and fed by the workers. The insertion of empty bobbins and the removal of full bobbins are also done by the workers.
Q.90. What are the errors that can be corrected by winding the yarn?
C.90.
1-thin-thick place in the yarn: The thick places in the yarn are the less twisted places. Thick places reduce the strength of the yarn and cause breaks in weaving. Thin places are the places where the fiber is low in the yarn. It causes breaks and fabric defects.
2- Knot in the yarn: Knots on the yarn can be of different sizes. Warp threads with knots do not pass through the lamellas, they break. In knitting, it causes needle breakage.
3-Piecing errors: Piecing errors occur because the end taken from the non-spun part during breakage in the yarn machine is placed under the yarn delivery cylinder together with the other end and shipped.
4-Fly winding flies: These are the errors that occur when the flies in the spinning mill are wound on the thread.
5-Vegetable and animal wastes: Vegetable and animal wastes are residues that can reach from bale to yarn. It causes errors during weaving.
6-Double thread defect: It occurs when two threads coming out of the last take-up cylinder in the spinning machine are twisted and wound on a spindle. Creates particularly significant surface defects.
P.91. What is the purpose of twisting?
C.91. Twist; It is made to increase the strength of the yarns (flat twist) or to gain different characters (fancy twist).
Q.92. What is the twisting machine?
C.92. In general, the machines in which the twisting process is performed are called twisting machines.
Q.93. What are the functions of the ring folding and twisting machine?
C.93.
a-To increase the durability of the yarn, b-To obtain thicker yarn. c-To obtain yarn with different properties. d-Obtaining mixed color (fantasy etc.) yarn.
To hold together the fibers that make up the e-yarn. f-To prevent the yarn from feathering. g-Obtaining more durable and strong yarn. h-Obtaining ready-to-weave yarn.
Q.94. What are the tasks of the Volkman twisting machine?
C.94.
1- Giving two twists to the yarn in each revolution of the yarn
2- To gain strength by twisting the yarns from different bobbins
3- It is to wind the twisted yarns at constant tension and in the form of long-length bobbins.
Pre-folding the threads increases efficiency on this machine.
Q.95.What are the functions of the folding machine?
C.95.
1-Preparing the single yarns to be twisted on a bobbin at the same tension for the twisting machine
2-If the threads are not cleaned before folding, they must be passed through the filtering device to clean the faulty parts.
3-It is to provide ease of operation in all subsequent processes by wrapping in coil form and long-length.
Q.96. What is the difference between ply twisting machines and folding machines?
C.96. The difference between folded twisting machines and folding machines; the presence of twisting devices in the twisting machines and the twisting of the yarn in addition to the folding process.
P.97. The yarns seen below are wrapped on a textile material according to a certain technique. Can you write their names?
C.97.