The bag making machine usually has several main functions,inclusing material feeding,sealing,cutting and bag stacking.
In the feeding part,the flexible packaging film fed by the roller is uncoiled through a feeding roller.The feed roller is used to move the film in the machine to perform the required operation.Feeding is usually intermittent operation,such as sealing,cutting and other operations are carried out during feeding stop.The dancing roller is used to maintain a constant tension on the film reel.In order to maintain the tension and critical feeding accuracy,the feeding machine and dancing roller are necessary.
In the sealing part,the temperature controlled sealing element is moved to contact the film for a specific time to properly seal the material.The sealing temperature and sealing time vary according to the material type and need to be kept constant at different machine speeds.The configuration of the sealing elements and the related machines depend on the sealing type specified by the bag design.In most machine operation situations,the sealing process is accompanied by the cutting process,and these two operations are carried out when the feeding is completed.
During the cutting and bagging operations,such operations as sealing are usually carried out during the non-feeding cycle of the machine.Similar to the sealing process,cutting and bagging operayions also determine the best machine form.In addition to these basic functions,the implementation of additional operations,such as zipper,perforated bag,handbag,vandal proof seal,bag mouth,cap and crown treatment,may depend on the design of the packaging bag.Accessories attached to the base machine are responsible for performing such additional operations.
