Sealing
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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!
The "sealing" mode is available for production in particular, in addition to the input menu (see
chapter 11 Input). All relevant functions and settings for the sealing process are shown here
on the display depending on the program selection and the machine status.
The program selection function can be used to select the following production types in
"sealing" mode.
Manual sealing, see chapter 10.05
Dynamic sealing, see chapter 10.06
Programmed sealing, see chapter 10.07
Programmed dynamic sealing, see chapter 10.08
Programmed sealing with sequence program. see chapter 10.09
10.01 Sealing principles
Due to the vibrations of the sonotrode, the plies of the workpiece are mechanically
"hammered" 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 8311 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 sealing machine settings are always dependent on the type of material being
sealed and the ambient temperature. Optimum settings can only be determined
by means of test sealing processes as a result of the influence of the individual
parameters on each other. All settings required for the sealing process are
entered or displayed in the control panel.
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