Technical Manual & Parts Lists
27
Seal Bar Maintenance and Replacement
WARNING:
Wait until the heat sealing bar has cooled enough (approx. 3 hours) before servicing seal
bars or the areas near the bars. If maintenance on the machine is absolutely necessary before sealing
bars have had a chance to cool down, the person performing the maintenance must use safety equipment
approved by OSHA or local law to protect against burns.
The unit has three (3) heat sealing bars. (a-cross
seal), (b-right seal), and (c-left seal). The optimum
temperature and the dwell settings depend on the
type of plastic film being used, the thickness of the
film, and the bag construction. For instance, if the
requirement is for boot plastic only at one end of the
bed, this means there are four plies of plastic on one
side, but only two plies on the other side. Furthermore,
the Cross Seal has to seal four plies on one end, and
only two on the other. Due to the variations such as
that, the dwell times and/or the
temperature are fine-
tuned during the machine installation. After Installation if the packaging variables ever change,
the dwell time in most cases is the only correction needed for a proper weld.
Temperature Settings
Standard temperature settings of the heat sealing bars are as follows:
Sealing Bar
Temperature º F / º C
Closing Time
Cross Seal No Boot
325 º F / 162 º C
170 a 200
Cross Seal W/Boot
345 º F / 173 º C
170 a 200
Right edge No Boot
325 º F / 162 º C
170 a 200
Right edge W/Boot
345 º F / 173 º C
170 a 200
Left edge No Boot
325 º F / 162 º C
170 a 200
Left edge W/Boot
345 º F / 173 º C
170 a 200
The left seal thermo coupler is monitored by the # 27 module, the right seal is module # 35 and the cross
seal is module # 22.
Seal power left, right, cross seal and manual seal are controlled by modules # 11 and # 12.
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