Sealing
31
10
Sealing
The machine may only be operated by properly instructed personnel. The
operating personnel must make sure that only authorised persons are in the
danger zone of the machine.
In particular for the production, in addition to the input mode (see Chapter
11 Input
), the
sealing mode is available. Here, depending on the program selection and the machine sta-
tus, all relevant functions and settings for the sealing operation are shown on the display.
In the sealing mode, with the program selection function following production types can be
selected, see Chapter
9.02 Program selection
:
Manual sealing, see Chapter
10.02
Dynamic sealing, see Chapter
10.03
Programmed sealing with individual programs, see Chapter
10.06
Programmed sealing with sequences, see Chapter
10.08
10
.01
Sealing principle
Due to the vibrations of the sonotrode, the plies of the workpiece are mechanically "ham-
mered" in the seam area. Through the hammering motions of the sonotrode the workpiece
is heated until it becomes viscous and at the same time it is pressed and fed to form the
seam.
In order to achieve optimum sealing results, certain conditions concerning the workpiece
and the machine settings have to be fulfilled.
The workpiece must be:
- sealable (thermoplast),
- suitable for processing with the PFAFF
8310-003
with regard to thickness and properties
and
- clean in the seam area.
The basic requirements on the machine are:
- selection of the correct feed roller and setting
- roller pressure
- sealing power
- sealing speed and
- roller gap (distance of the anvil roller to the sonotrode during sealing).
All settings of the sealing machine are always dependent on the type being
sealed and the ambient temperature. As a result of the influence of the
individual parameters on each other, optimum settings can only be determined
by means of test sealing operations.