900 Ready-To-Use Sacks In An Hour!
The Indian Textile Journal|March 2018

An online process for the non-stop production of sacks on KARL MAYER’s RDS 11 EL machine makes the machine unique.

KARL MAYER has revamped its machine technology for producing packaging sacks. As before, this fully integrated system enables ready-to-use, high-quality products to be manufactured non-stop from film at maximum efficiency. What is new, however, is the machine’s level of flexibility. As the most important element, the double-bar raschel machine has been equipped with an EL pattern drive, which enables variable sack lengths and lappings to be worked.

Five blades per inch produce tape yarns from film

An FTL unit is located at the beginning of the processing chain for producing sacks. This element in the production line has a cutting bar for cutting a double-layered, primary polyolefin film into tape yams and drawing them in a heating zone to produce monoaxial flat film yarns. These yarns are delivered to the Double-bar raschel machine, in depending of the demand. The needs-based delivery of the tape yarns is a decisive factor for online process control, just as is the exact harmonisation of the machine technology as a whole (Fig. 1). “With this non-stop sequence, everything must function perfectly and all the components have to be in perfect harmony, rather like an orchestra,” says Rainer Baier, a product developer, at the machine presentation.

A tried-and-tested basic design

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