S-CH

Operation: The bag closing machines from the S-CH series seal bags made of polyethylene, PVC or other thermoplastic films using the Doboy continuous band sealing principle. The bag is guided at the seal level by PTFE coated steel bands through the heating section. This guarantees the most efficient heat transfer and avoids direct contact of the plastic film with the heat source.

Heavy duty carrier chains running synchronously immediately below the steel bands grip the bag top and maintain control through the entire machine. At the same time the sack is supported by a conveyor (additional equipment). The heating section consistst of heater bars, the number depending on machine type and required output. 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 sack passes cooling bars or air blowers to cool down the seam.

Machines S-CH/ D95 which are equipped with the Doboy Swing needle sewing heads type D95 are used for the closure of woven fabric sacks with plastic inner liner. They heat seal the inner liner and sew all layers of the sack 

Further types and variations are possible. Pillow type sacks made from films 70...300 µm are sealable. At gusseted sacks or with overtape the total thickness is limited to 1000 µm.