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higher order beam
WARPING: In general terms, warping is the process of transferring the yarns from the creel of single end package forming a parallel sheet of yarns wound onto a beam or a sectional beam.
TYPES OF WARPING: •
Direct warping
•
Sectional warping
•
Ball warping
•
Draw warping
COMPONENTS OF WARPING MACHINE: Atypical warping machine have three main components •
Creel
•
Headstock
•
Control devices
GENERAL DISCUSSION: Normally creel has the capacity of 800, 1000, and 1200 while in our mill, the creel capacity is 1050. The flange to flange distance of warp beam is 2400mm. In sizing machine we divide the two sheets of yarns into two different size boxes. We have sizing machinery of benninger.
SECTIONAL WARPING: We do sectional warping normally for polyester, double yarn, intermingle yarns etc. Capacity of sectional warping is 600. In sectional warping we divide the beam according to the requirement of ends. Let consider an example, that if we have 6000 ends then we divide it into 10 divisions so that we can get 600 ends because the capacity os reed in sectional warping is 600.
In sectional warping ends first wound on the drum and then they are transferred to the sectional beam. For polyester yarn there is no requirement of sizing in sectional warping.
DENIM BACK PROCESSES: ✔
Ball warping
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Re beaming
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Rope dyeing
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Sizing
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Weaving
Defects of fabric:
Beam defects Temperature defects Defects of sizing
DEFECTS OF SIZING:
SIZING STAINS: STAINS :
Sizing stains is the measure source of sizing. The causes of this problem are
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Drops, which falls down over the fabric from the sheet above the drying cylinders.
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The second cause of sizing stains is the pressure gun, when the worker does not place the pressure on the exact position then grease falls onto the fabric.
HARD SIZE:
When the stoppage occurs in the sizing machine then the chemicals becomes hard at the stage of pressing roller, and then we adjust this problem at the stage of weaving.
TEMPERATURE DEFECTS:
BEAM DEFECTS:
When the pressing roller touch with the ends of the bean then cracks produce at that side which may become the cause of yarn breakage.
THREE TYPES OF WEFT PACKAGES
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0
degree
This This pack package age we norma normally lly used in Open Open end end spin spinnin ning g for weft in high high and and medium speed looms.
5 degree 57 minutes
Normally Used in ring spinning and specially in high speed looms.
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9
degree
42
minutes
Normally used in old type ring spinning. For low speed shuttle looms.
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If one degree is subdivided in 60 equal divisions than one division is equal to one minutes
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If one minute is subdivided subdivided in 60 equal divisions than one division is equal to one second.
