Bag closing

Continuous Band Sealer Bag Closing machines

Continuous Band Sealer

MEYPACK offers continuous band sealers, using the DOBOY band sealing principle, in a wide variety of performance ranges for safe hermetically tight closures of plastic bags. The perfectly homogenous sealing with heater bars and continuously moving bands is done under pressure.

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Continuous Band Sealer
manual or fully automatic bag feeding
Easy to operate and maintain
Minimal changeover times

product benefits

rugged design for multi-shift operation
high heat efficiency due to spring-loaded heater bars
simple operation and maintenance due to good accessibility
short change-over time for varying bag dimensions
compatible with any common open mouth bag feeding system

Type of closure

SIMPLE HEAT SEAL
SIMPLE HEAT SEAL

PLASTIC FILM BAG

Heat sealing with overtape
Heat sealing with overtape

for products that cannot be blown off the inner bag wall

Combined heat seal and sewing
Combined heat seal and sewing

FOR WOVEN PP BAGS WITH PE-LINERS

Crimp seal
Crimp seal

FOR PAPER BAGS WITH INNER COATING

overview

On machines with water cooling bars the seals are cooled down under pressure between the steel bands. This gives incomparable smooth seals. The also possible air cooling, in comparison, is leaving wrinkled seals due to free shrinking. Further optional equipment fits the machine to difficult applications, e.g. dusty filling goods.


Method of operation

The bag closing machines series CBS utilize the continuous sealing process. The bag is guided at the seal level through the heating section by PTFE-coated steel bands. This guarantees the most efficient heat transfer and avoids direct contact of the plastic film with the heat source.
The heating section consists of heater bars, the numbers depending on machine type and required throughput. The automatic temperature control of the heater bars enables the user to run the machine constantly with a sealing process perfectly set to the bag specification.
After heat sealing, the bag passes through cooling bars or air blowers to cool down the seal. Carrier belts immediately below the steel bands, hold the top of the bag top and maintain control through the entire machine. At the same time the bag is supported by a conveyor (additional equipment).
Machines CBS-S equipped with sewing heads F100, DS-9, or N980A are used for the closure of woven PP fabrics bags with PE inner liner. They heat seal the inner liner and sew all layers of the bag.

option & data sheet

Cleaning station

When powders (contrary to granules, prills, flakes) are filled into bags, dust clouds blow up in the bag on the spout during the filling process and contaminate the inner bag wall with a dust layer. This layer works as a separating agent for  later heat sealing of the inner liner – the seal can be peeled when stressed. In the cleaning station dives a nozzle for approx 50 mm into the bag (top) and blows off the dust in the sealing zone. A heat seal made in this clean zone  does not peel.

 

 

Electromotive elevating device OVERTAPER CODER

The distance between conveyor and sealer head must be adapted to different bag lengths. This can be done by rising or descending the conveyor or sealer head, the other being at fix level. The sealer head is generally height-adjustable (belts at 700 – 1630 mm above floor range), this is for the light and medium wheight heads with a manual crank (on long heavy-weight heads always electromotive). If the sealer head shall be adapted to the bag length frequently, the manual crank can be replaced by the comfortable electromotive hight adjustment.

CBS series

Model Heating
section
mm
Cooling Max.
vf.
m/min

Pdrive
kW

Pheating
kW

Length
mm
Width
mm
Height
mm
CBS-A 400 sh 2 x 200 air cooling tubes 800 mm 14 0,37 1,8 2300 1120 1950
CBS-W 400 2 x 200 2 pairs water cooling bars 14 0,37 1,8 2950 1120 1950
CBS-A 600 3 x 200 air cooling tubes 900 mm 22 0,55 2,7 2950 1120 1950
CBS-W 600 3 x 200 2 pairs water cooling bars 22 0,55 2,7 2700 1120 1950
CBS-A 1200 6 x 200 air cooling tubes 1800 mm 22 0,75 5,4 4530 1120 1950
CBS-W 1000 5 x 200 2 pairs water cooling bars 22 0,75 4,5 2990 1120 1950
CBS-S 600 3 x 200 air cooling tubes 1200 mm 14 0,9 2,7 3770 1120 2600
CBS-S 1000 5 x 200 air cooling tubes 1800 mm 22 1,6 4,5 4530 1120 2600

Further models and variations are possible as the series CBS is the most unitized.

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