Bag Making Machine

Bag making machines produce bags / pouches that are used to package various types of goods in food and beverage, pharmaceutical and consumer product industries. In general these machines are fully automatic and require operator intervention only to replenish the raw material and remove the finished products.

The operating principle of the bag making machine

Bag making typically has certain main functions which make up of material feeding, sealing, cutting and stacking.
In the Feeding section, roll-fed flexible packaging film is unwound from a feeder roll. Feeder rollers are used to move the film through the machine to carry out the required operations.
Feeding is usually an intermittent operation and other operations like sealing and cutting are carried out when feeding has stopped. Dancer systems are used to maintain a constant tension
on film web. Feeders and dancers are required for maintaining tension and critical accuracy in
feed.

In the Sealing section, temperature controlled sealing elements are brought into contact with
the film for a specified amount of time to appropriately seal the material. The sealing
temperature and sealing time is dependent on the type of material and they need to be
maintained constant for different speeds of the machine. The sealing element configuration and
thereby the machine format is dependent on the sealing type dictated by the bag design. In most
machine formats, sealing is accompanied by cutting and both of these are carried out only when
feeding has come to stop.

In the Cutting and Stacking operations, like sealing are typically done during the non-feeding
time of the machine cycle. Similar to sealing, the cutting and stacking also would determine the ideal machine format. In addition to these basic functions additional operations like zipper, hole punch, handle punch, tamper proof seal, spout, cap etc. might be carried out depending on the
bag design. Accessories attached to the base machine are used to carry out the additional operations.