An important topic for textile fabric department

1. Beat-up Mechanism
Name: Syed Ferdous Mahmud
Department: Textile Engineering
BGMEA University of Fashion & Technology
Weaving

2. Beating-up Mechanism
Beating up is the third primary motion in weaving. It consists
in driving the last pick of weft to the fell of the cloth. This is
accomplished with the help of a reed fixed in the sley. The
sley is given a sudden and quick movement towards the fell
of the cloth by the cranks in the crankshaft. The sleywood
runs from one shuttle box to another, and when at its
backward movement, the shuttle travels over its race.

3. Objectives:
 To push the newly inserted pick to the cloth fell.(Fell is the last
position of the last pick in cloth woven on the loom.
 To ensure uniform pick spacing

4. Main parts:
Crankshaft
Crank
Connecting arm
Reed cap
Reed
Sley race
Sley
Sleysword

5. Mechanism:
Beat up is done by reed which is fixed
on sley by means of reed cap. This
pushes the new weft thread to the
fell. Sley gets its reciprocating motion
from the rotating crank shaft through
the connections of crank and crank
arm. The sley is mounted on two
swords which are fulcrummed on the
rocking shaft and gets the motion
from crank.

6. Common Beat Up Mechanism
In fig, A is the sley, B is the sleysword, C the rocking
shaft, D the crank, X is the crank shaft , E the
crankarm, F the connecting pin, Y is reed, G a metal
plate on the sleysword, H is the lath, J & k is bolt and T
is plate.
C is supported on bearing and bolted to end frame.
Crankarm E is fulcrummed to the sleysword B and is
bent on the crankshaft. As D revolves a swinging
motion is given to the sley. After the shuttle passes the
weft thread is pushed to fell by reed Y which is
mounted on the sley sword by means of H T and J.

7. Double Beat up Mechanism
In carpet and other heavy looms it needs two blows to the weft in quick succession
during one revolution of the crankshaft, by straightening two arms which are knuckle
jointed. Each time they are straight sley gives a beat up.
Here, A is sword, B is crank, C is a
connecting arm, D is knuckle joint, E is
an arm jointed to frame I and F is
another arm attached to sley.