Soon also for aseptic and carbonated beverages
At drinktec KHS is presenting a demonstration system for the growth market of still water. The technology is also currently suitable for the filling of liquid soap and liquid detergents and for hot fill applications. “At the moment we’re concentrating our development on ensuring stable processes in these focus areas,” explains Frank Haesendonckx, head of Sales and Technology at KHS Corpoplast GmbH and the person responsible for the project. Aseptic and carbonated beverages make greater demands of the new blow molding process. KHS wants to adapt the process for these beverages at the next stage in the project.
As in the conventional processing of plastic containers the machine heats up the preforms according to the required temperature profile. The product to be filled is then forced into the PET preforms under pressure with a controlled volume flow. The bottle is formed by the product to be filled as opposed to the compressed air used to date. In this process the preform material is automatically distributed along the inner contours of the container shape. The stretch rod aligns the bottle lengthwise and is automatically retracted from the container after filling. The given fill level is reached when the displacement volume is removed and before the cap is placed on the neck.
KHS FormFill yields enormous savings potential – and not just in line operation: by doing away with an entire function module and with the smaller diameter of the rotary machine the total amount of space required is reduced. In the current test environment of 40,000 bottles per hour the new procedure only needs about 25% of the installation space of standard stretch blow molder/filler blocks when filling beverages.
In line operation users will see a boost in efficiency with regard to time, energy and maintenance especially. As the conventional stretch blow molding process is no longer required, KHS FormFill fills PET containers more quickly. Forming and filling takes about the same time as the formerly separate stretch blow molding process. Saving on the high-pressure air compressor alone results in a considerable drop in energy consumption. Maintenance costs are cut by the use of fewer components and format parts.
> Frank Haesendonckx, head of Sales and Technology at KHS Corpoplast GmbH