P.39. What is a loop, explain?
C.39. It consists of specially shaped yarn loops formed by knitting needles. The loops form a knitting surface by connecting with each other on top of each other and side by side. The loop has two different views when viewed from the front and the back. The same loop is called the right loop when viewed from the front of the fabric, and the left loop when viewed from the back. The reverse or straightness of the fabrics can be understood from the right-left loop views. The right is the front, the left is the back.
P.40. Make the technical drawing of the loop?
C.40.
P.41. What is a hanger loop, please explain?
C.41. The hanger is the incomplete half of the loop. It is a type of loop formed by completing the full loop movement of the knitting needle in weft directional knitting and investing two consecutive threads on it.
S.42. Hanger Make the technical drawing of the loop?
C.42.
S.43. What is a skip loop, explain?
C.43. The jump loop is not essentially a loop movement, but an auxiliary surface element formed by the needle not working.
S.44. Jump Make the technical drawing of the loop?
C.44.
P.45. What is the name of the loop in the knitted fabric you see?
C.45.Right Loop
P.46. What is the name of the loop in the knitted fabric you see?
C.46.Left loop
P.47. What does the chain stitch mean, what are the types, in which clothes is it used?
C.47. Remeiose (chain) stitch A type of stitch in which a single thread passes through the fabric layer or layers and is looped with itself on the opposite surface. The chain stitch, which looks like the intertwined links of a chain, comes in a variety of single-thread, double-thread, and multi-thread. It is a sewing technique used in the production of flat knitted garments in collar, band and may follow-up stitches.
P.48. What does piping mean, where is it used in plain knitting?
C.48. Bias is prepared to cover the edge of garments or to be seen from the face of the garment between joining seams. It is especially used for decoration and edge cleaning in plain knitted garments.
P.49. What is hem hem pressure stitch, please explain?
C.49. Hem pressure stitch It is a hemming and pressing stitch made with curved needles and blind stitch machines.
P.50. What is press stitch by machine?
C.50. It is the curling process made with a straight stitch.
P.51. What is a cover stitch, explain?
C.51. A cover stitch is a stretchy stitch created with two needles, three or four threads. A double needle straight stitch image is formed at the top and a knitted chain stitch image is formed at the bottom.
P.52. What is the overlock stitch, in which textile products is it used, what are the types?
C.52. Overlock stitch It is used to close the edge (overlock) on woven fabrics and for basic stitching in knitting and combed fabrics. There are three-, four-, and five-thread versions.
P.53. What is a straight stitch, explain?
C.53. Straight stitch It is a stitch that looks the same on the upper and lower surfaces, and is formed by interlocking the thread from the needle and the thread from the bobbin in the middle of the fabric layer or folds.
Q.54. How does the Knitting Type and Pattern Structure affect the width of the fabric in weft knitting machines?
C.54. In circular and flat knitting machines, the density or looseness of the knitting and the structure of the patterns affect the width of the fabric. The width of the loosely knitted fabric will be wider when tight knit in one machine and loose knit in the other in two machines with the same characteristics. In addition, some patterns cause the fabric to gather or open. In particular, stacked knits collect the fabric more and have a transverse effect.
Q.55. How does the Stitch Bar Density affect the width of the fabric in weft knitting machines, please explain?
C.55. Loop bar frequency; The number of loops in 1 cm is called. The change in the number of loops is very important, it is directly proportional to the fineness of the machine, if the fineness increases, the number of needles increases, if the number of needles increases, the number of loops (bars) increases, if the fineness decreases, the number of loops (bars) decreases.
The loop bar density of two different fabrics produced by adjusting the density setting on the same machine will also be different. When the other properties are the same, the fabric with less bar density will be wider than the other.
S.56. Weft knitting machines How does the Yarn Type and Number affect the fabric width, please explain?
C.56. Not every type of thread is suitable for working on the machine, it is necessary to choose the thread number suitable for the fineness of the machine and the fineness of the needle. As the yarn thickness increases, the fabric width also increases at a certain rate. This is due to the texture of the fabric, because the thickness of the thread is proportional to the fineness of the machine. Since the thick yarn is knitted on machines with lower faults, the knitting will be looser and the fabric will also affect the width.
P.57. Why is the working speed of knitting machines important?
C.57. Working speed of knitting machines is important to increase efficiency in production.
P.58. Are the working speeds of flat knitting machines and circular knitting machines the same?
C.58. Flat knitting machines and circular knitting machines are very different in terms of speed due to their working principles. Flat knitting machines are slower as they are round-trip.
P.59. What does the number of systems mean in flat knitting machines?
C.59. The system number indicates how many rows the machine knits in one round trip. Each system creates a queue.
P.60. What should be considered when calculating the working speed of single system flat knitting (Knitwear) machines?
C.60. In flat knitting machines, apart from the working width of the machine, there are also sled return paths on both sides. When calculating the machine operating speed, these return paths should also be taken into account. When making the calculation, the result including the return path as the machine width should be taken as a basis. The value found here reveals the speed of the sled (saddle) to which the systems of the flat knitting machine are connected, in proportion to the number of systems it makes per second.
P.61. What information is required when calculating the working speeds of single-system flat knitting (Knitwear) machines?
C.61. Return path (cm) (sum of parts that are not worked on the machine) - Slideway (machine width) (cm) - Machine speed (m/sec.) - Number of round trips made by the machine in one minute
P.62. Why do we multiply the number of revolutions by two when finding the number of rows on flat knitting machines?
C.62. In flat knitting machines, the number of revolutions is given instead of the number of courses. Therefore, when calculating, it should be taken into account that the machine makes one round trip and one return and knits two rows in one revolution. That's why we multiply the number of revolutions by two when finding the number of rows.
P.63. In flat knitting machines with a single system, the slideway, that is, the machine width How is (cm) calculated?
C.63. Slideway (machine width) (cm) = Machine Working Width (cm) + ( 2 x Return path (cm) (sum of parts not worked on the machine)
P.64. How is the machine speed ((m/sec.) calculated on flat knitting machines with a single system?
C.64.Machine speed ((m/s.) = Slideway (machine width) (cm) x Number of round trips per minute (course/min.) / 100
P.65.The working width of the single-system flat knitting (knitwear) machine is 320, the return path is 40 cm, and the machine speed is 16 rpm. What is the working speed of this machine?
C.65. Machine speed ((m/s.) = Guideway (machine width) (cm) x Number of round trips made by the machine in one minute (stroke/min.)
Machine Speed (m/sec.) = Slideway (machine width) (cm) xn(stroke/min. /100 x 60
Slideway (machine width) (cm) = 320 + (40x2) = 400 cm
Since the sled covers the return path once on the way and on the way back, the return path is multiplied by two when calculating the width of the machine.
Number of round trips made by the machine in one minute = 16 (rpm) x 2 = 32 strokes/min.
Machine speed (m/s) = 400 x 32 / 100 x 60
Machine speed (m/sec.) = 2.13 m/sec.
Q.66.What is the difference between the working speeds of double and more system flat knitting (knitwear) machines?
C.66. The difference of flat knitting (knitwear) machines with double or more systems from single system is that if each system knits a row, it knits as many rows as the number of systems in each movement. Here only the number of rows changes.
P.67. How to find the number of rows (course/min.) on multi-system machines?
C.67. In multi-system machines, the number of revolutions is multiplied by the number of systems, and the number of rows per minute (course/min.) is found.
P.68. In the six (6) system flat knitting (knitwear) machine, the working width is 320, the return path is 40 cm, and the machine speed is 16 rpm. What is the working speed of this machine?
C.68. Machine speed ((m/s.) = Guideway (machine width) (cm) x Number of round trips made by the machine in one minute (stroke/min.)
Machine Speed (m/sec.) = Slideway (machine width) (cm) xn(stroke/min. /100 x 60
Slideway (machine width) (cm) = 320 + (40x2) = 400 cm
Since the sled covers the return path once on the way and on the way back, the return path is multiplied by two when calculating the width of the machine. In machines with more than one system, the number of revolutions is multiplied by the number of systems.
Number of round trips made by the machine in one minute = 16 (rev/min.) x 2 = 32 courses/min (for a single system) 32x6= 192 courses/min. ( for 6 systems )
Machine speed (m/s) = 400 x 192 / 100 x 60
Machine speed (m/sec.) = 12,8 m/sec.
P.69. In what respect are the number of revolutions and the number of systems important in flat knitting machines?
C.69. It is important in terms of production efficiency.
Q.70. Explain the working speed in Circular Knitting Machines?
C.70.Circular knitting machines are many times faster than flat knitting (knitwear) machines. The number of revolutions and systems in circular knitting machines is much higher than in a flat knitting machine. The main purpose and working principle of circular machines is to produce more fabric in a short time. The systems are fixed and movable needle plates are created so that it is designed to knit 40-120 rows at the same time..
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