Transcript of Overview The top seal mechanism consists of a foil unwinding and feeding mechanism and a cutting and...
- Slide 1
- Overview The top seal mechanism consists of a foil unwinding
and feeding mechanism and a cutting and welding mechanism. It is
designed to cut out and weld into place aluminium top seals for
tube.
- Slide 2
- Operating The laminate is held on a roll at the top of the
machine protected by safety doors. The foil is tensioned by means
of a tension belt looped over the top of the foil reel. The tension
can be varied by adding or removing weights to the belt.
- Slide 3
- Operating The reel can be removed by loosing the clamping
mechanism grub screw and undoing the ring clamp.
- Slide 4
- Operating There is a sensor to detect the end of the laminate.
When the end of laminate sensor is triggered it sends a signal to
stop the machine. The operator can now replace the empty reel with
a new one.
- Slide 5
- Operating The unwinding mechanism is to ensure the smooth and
uniform unwinding of laminate from the reel. The pneumatic cylinder
applies a constant pressure to the rubber roller. The metal roller
is driven by the drive belt and a servo motor.
- Slide 6
- Operating The unwinding mechanism is to ensure the smooth and
uniform unwinding of laminate from the reel. The pneumatic cylinder
applies a constant pressure to the rubber roller. The metal roller
is driven by the drive belt and a steper motor.
- Slide 7
- Adjustments The base adjustment mounts provide a rough position
setting for the mechanism
- Slide 8
- Adjustments The tube body sensor detects the presence of a
correctly positioned tube body.
- Slide 9
- Adjustments Adjust the tube body sensor by loosing the two
adjustment bolts and moving the sensor so its red light points to
the screw thread on the shoulder.
- Slide 10
- Adjustments Surrounding the cutter head is an induction heating
coil which will heat the head at the correct time to weld the top
seal in place.
- Slide 11
- Adjustments It is important to align the cutting/welding head
accurately to achieve a good cut and weld. The adjustment bolts can
be loosened to both rotate and position the head perpendicular to
the axis of the tube body.
- Slide 12
- Adjustments The forward and backward motion of the head is
controlled by a pneumatic cylinder fitted to the rear of the hollow
tube. There are two sensors, one for the forward position and the
other for the rear position..
- Slide 13
- Adjustments The unwinding motor is connected to the metal
roller by a toothed belt. The belt can be tightened by loosing the
two adjustment bolts holding the motor.
- Slide 14
- Trouble Shooting Problem CauseWay of removing 1.The foil keeps
breaking between the cutting head and the unwinding rollers. 2.Top
seals are burnt. 3.Top seals are not cut correctly. 1.1The weight
on the tensioning belt is too much. 1.2 The head is too close to
the tube body. 2.1 Welding time is too long. 2.2 Cooling air supply
is not enough. 3.1 Mis-alignment of cutting head. 3.2 Ceramic
cutting head blunt. 1.1Remove some of the weights. 1.2 Switch off
air supply. Adjust the pneumatic magnetic sensors. 2.1 Reduce the
inductor welding time on the HF generators control panel. 2.2
Increase the air flow by opening the air supply valve. 3.1 Adjust
the head so it is exactly square on to the tube body. 3.2 Replace
the ceramic cutting head.
- Slide 15
- Maintenance The only regular maintenance to be carried out is
to replace the cutters when they become blunt. This should be
carried out by a Mechatronica engineer.