Sectional Warping Calculation

Is calculated as the polar moment It Iy Iz except for rectangular sections see the remark at the end of this topic warping constant Iw is equal to 0. If the density of warp yarns is very high the beaming process has to be carried out in sectional warping each consisting of a number of warp yarns Fig.

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One objective here however was to calculate the warping constant F using the classical formula r fA dA 22 where A is the cross-sectional area of the bar under torsion while the so-called warping y z represents the axial displacements per unit twist.

Sectional warping calculation. How To Calculate Warping Constant For A Hat Section In Case Of Lateral Torsional Buckling. And structural parameter of fabric geometry while chapter 8 includes specialty calculations like terry towel ball warping filament warping and sample warping. Number of Extra Pattern ends At Both ends Near Selvedges 24.

The production is less in sectional warping. Page 2 of 6 Set calculations for given quality and color repeat We were provided with the following fabric. Dy dz are equal to 0.

The reason for this procedure is the dimension of the creel for a limited number of yarn bobbins. Uniformly distributed torsion in hss beam structural ering general discussion eng st venants torsion constant of hot rolled steel pros and position the shear centre canadian insute of steel construction 2002 contents page introduction calculation of the. Of ends per pattern 42.

221894 mm 20 mm. The whole range of steps and calculations involved in the fabric formation process from amount of. Sectional warping is used to produce a warp beam with a greater member if ends.

Sectional warping is used to produce a warp beam with a greater member if ends. Available Creel capacity 560 Total no. Efficiency is calculated depended on worker working shift Actual Production.

Number of ends per Pattern 32. Selvedge ends at Each Side 20. The production is less in sectional warping.

The warp yarns have to be oriented strictly parallel in order to prevent any yarn. 8736 x 254 mm 20 mm. Now we will discuss about warping Calculations.

Yarn guide and a tensioner are provided in the creel for each warp end. Total section Total Ends Creel used 7000 504. The coordinates y and z are located.

The chapter 9 is dedicated to the knitting calculations both warp and weft knitting. Total ends EPI x fabric width inches 52 x 84. 2239 mm beam width.

The yarn is wound in sections each section having a particular width. The yarn tension is less uniform. The creel of sectional warping contains 8 rows in each side.

In this creel yarn packages are mounted on the cone holders from outside of creel. Sectional warping is also applied for fabrics with different colors in the warp. This new generation of warpers confirms the Design and Technology motto that has set COMSAT aside throughout their 55 years of history.

A stripe warp of the following particulars is to be made on a sectional warping machine-Total no of ends 2240. The UNI series allows warping of any type of material from cut fibers to continuous fibers with or without. Sectional Warping Calculation In sectional warping also we have two stages.

A Typical Calculation for Sectional Warping. The steps involved in the set calculations were. After loading the yarn packages on the creel the stands of creel are revolved at 180 degree.

Of pattern per section Creel CapacityTotal ends in pattern 560 42 1333 12 pattern As required Creel to be used Total pattern x Total ends in pattern 12 x 42 504. The yarn tension is less uniform. It is less efficient than high speed warping.

The sections are then combined to form the weavers beam. These are mounted on the iron frame which can move away by rotating hand wheel or electric motor. Salient Features- Leas insertion by 3 axis Robot No need to cut the section until end of warping Precise and quick yarn separation with optical monitoring Su.

The count of the warp yarn was found out. The density of the warp ends wound on to the drum is similar to the warp density on the weavers beam. COMSAT in stirving to remain at the forefront of technological progress has developed the advanced and fully computerized UNI series sectional warping machine.

200003 14000 74000 yards Machine speed 350 yardsmin Production time 74000 yards 350 332 hour total length speed Creel time 100 hour Breakage 962 323 hour Cleaning time 0 hour Electrical 0 hour Mechanical 0 hour Total time used 744 hour Idle time. In the first stage we wind a certain number of warp ends which depends on the creel capacity on to a warping drum. Effective surfaces for shear are taken equal to the total surface Ay Az A torsional moment of inertia It.

If the creel capacity is 480 bobbins and the width of warp in the reed is 35 calculate the following-. The number of columns varies according to requirement of creel capacity. Beam width reed space mm 20 mm.

Thus the total number of warp ends for the weavers beam is divided into suitable number of sections on a warping drum.

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