Bag Machine Replacement Parts Come in All Shapes and Sizes

If your business uses a bag machine, you have probably noticed what a complicated piece of machinery it is. Several different mechanisms are involved in feeding material into the machine, sealing it, cutting it and making other modifications to it as well as counting and stacking the finished bags as they come out. These mechanisms contain parts as simple as a normal ¼ inch bolt and as complicated as a computer microchip. This makes the process of finding and stocking bag machine replacement parts a bit more complicated than you might think.

The Feeder Mechanism
Making bags requires raw material, and whether that material is paper or plastic, it is most likely being fed into the bag making machine the same way – with rollers. This feeder portion of the machine is sometimes referred to as the “Unwind” section, because the plastic or paper is unwound from a roll using a mandrel and a brake. More advanced machines will include a “Dancer” to control tension and computerized edge position control. Two rubber-lined rollers pull the material deeper into the machine. Any one of these parts might wear out at any time and require replacement.

Bag Creation
In some cases material may be pre-printed with a company logo or other information, and in those cases sensors and controllers would make sure that the material is positioned correctly so that the printing does not get cut or damaged in the bag-making process. The machine itself may also have printing capabilities and add the logo as part of the process, using inkjets and print heads.

The bag also needs to be sealed, usually using a heating element and a press or rollers. Temperature controllers make sure that the temperature is right to seal the bags without burning them. A cutter would then slice the bags into the desired size and shape. Some accessory modules can punch holes, add handles or put pour spouts on bags, among other things. Bag machine replacement parts for these processes could be as generic as a cutting blade or as specific as a heat sensor.

Finishing Operations
Finished bags get pulled through the machine by a conveyor. At the end of the line, they are counted, often by a sensor, and stacked. Stacking may be as simple as letting the bags fall into a rack, or it can be accomplished more precisely with a microprocessor-controlled control arm.

A wide variety of replacement parts can be needed at any time to support the intricate processes of a bag machine, but fortunately sarr industries carries an extensive selection. Visit

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