Wednesday, May 8, 2019

REED'S SPECIFICATIONS, CALCULATION OF DENT WIRE THICKNESS

REED'S SPECIFICATIONS:

Reed of loom is a very important part. It is directly associated with fabric quality and loom efficiency. Improper reed specifications directly affect the warp breakages. High warp breakage rate due to improper reed specifications reflects in the form of poor fabric quality. Weaver also faces trouble during passing of knots through the dent of the reed. If the material of dent wire is not proper as per fabric quality to be woven. The dent wire gets band during broken ends drawing. If material is not proper, the rust can be deposited on the surface of the dent wire. This rust causes high warp breakage during weaving.
Now question arises, how to place an order to reed supplier for a particular fabric quality.
A weaver should consider following reed's specifications before placing an order to the reed supplier:

Overall reed width
Overall reed height
Working reed height
Dent wire thickness
Dent width
Dent' material
Height of top baulk
Height of bottom baulk
Reed thickness
Air space
Reed count

Overall Reed height, working reed height, dent width, height of top and bottom baulk, reed thickness and air space are fixed for a particular loom by loom manufacturer.


Overall reed width = ?
Overall reed height 99 mm
Working reed height = 75 mm
Air space = 65 - 70 %
Dent wire thickness = ?
Dent width = 4 mm
Dent' material = standard steel wire
Height of top baulk = 8 mm
Height of bottom baulk = 16 mm
Reed thickness = 8mm

Here we will discuss reed's specifications for following quantity.
Fabric width = 120”
EPI               = 110
PPI.              = 90
Warp count. = 40s
Weft count   = 40s
Reed.             = 106 ( stock port system)

Reed width:  this parameter is decided after calculating the reed space to be used during weaving of a particular fabric.
 we have to weave 120” fabric width. Now we calculate the required reed space for 120” wide fabric. Suppose reed space comes 124”. Now we will find out overall reed width.


Dent thickness:  It is very important specification of the reed. It plays decisive role in the calculation of air space.  The method of calculating the dent thickness is given below:








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