6. WELD IS RELEASED; HEAD RETURNS
TO HOME POSITION.
The hot-knife retracts and the welding clamp
pushes the two molten surfaces together,
welding the strap.
After this short delay to ensure that the strap
fuses properly, the cam shaft again turns and
the holding gripper retract to the neutral
position.
The anvil then retracts and welded strap is
released to the lower side of the package.
The cam shaft returns to the home
position and closes LS3 and LS5.
The electromagnetic clutch is
de-energized by LS3 while LS5
energizes SOL1. As the solenoid
pulls down on the tensioning lever,
the feed rollers close against the
strap, pushing it through the head
and out into the strap channel. The
feed timer de-energizes and sol1 is
released.
Strap feed stops and the machine is
ready for the next cycle.
NOTE: SOL1 ENERGIZES TO CLOSE
FEED ROLLERS AND FEED STRAP
AFTER THE CAM SHAFT REACHES
HOME POSITION.
HOLDING GRIPPER
END GRIPPER
WELDING GRIPPER
FEEDING ROLLER
ANVIL
-13-
GEAR REDUCER
SHAFT ROTATION
FIGURE 18. WELDING STRAP IS RELEASED;
HEAD IS IN HOME POSITION; STRAP FEEDS
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