KHS: Versatile manufacturing with quicker neck modifications on the stretch blow molder


(Picture: Frank Reinhold and Jörg Schwalfenberg)

Whereas up to now just one class of product was normally run on aseptic strains, bottlers of delicate drinks now face an ever-growing demand for flexibility. Beverage producers who course of each aseptically stuffed drinks and juice and carbonated comfortable drinks want to make use of 38-mm bottle necks for the previous and containers with 28-mm openings for the latter. If the bottle neck is to be modified on a PET line, nevertheless, up to now a relatively great amount of effort was required to transform the stretch blow molder specifically. Machines had been usually stopped for as much as 4 hours, tying up the usually only a few operators of the identical for a disproportionately lengthy time period. With its new, simplified neck changeovers KHS has now shortened the time wanted to transform the InnoPET Blomax stretch blow molder, together with the preform infeed.

It’s traditional to attempt to solely manufacture and fill bottles with an similar neck on one line. If a water bottler needs to provide a nonetheless and a carbonated product alternately, till now it needed to determine whether or not to make use of the upper and heavier neck actually solely needed for carbonated water for each merchandise or not. The bottler would then save time however waste materials and cash within the filling of the nonetheless water. The choice could be to stay with the lengthy intermittent downtimes attributable to a neck changeover. Moreover these concerns, advertising usually performs a task in a call like this, calling for a bottle tailored to swimsuit the varied merchandise. Mixed strains reminiscent of these that require neck modifications are fairly often present in Japan.

Advanced course of made easy

With a purpose to acquire an thought of simply how advanced the trade of elements for the above course of is on the stretch blow molder alone, it’s value taking a more in-depth have a look at the person steps concerned. First, the preform infeed must be adjusted and what are often called the mandrel heads changed which can be wedged into the preform necks to information these safely by way of the heating module. The grippers that transport the preforms by their necks to the blow wheel are then exchanged on the star wheel. Lastly, the molds within the blow stations, the blow nozzles and sometimes the stretch rods and additional grippers downstream that feed the completed containers to the following filler should be modified over. Right here, the variety of elements that want changing depends upon the dimensions of the machine.

The mandrels and shields particularly are of explicit significance: the upper the machine output, the longer the heater, because the containers might transfer quicker however at all times want the identical period of time to warmth up. On an InnoPET Blomax 16 stretch blow molder with a capability of as much as 48,000 bottles per hour, round 170 mandrel heads and shields need to be modified by hand, as an illustration. Which means this a part of the neck change is especially related in the case of the period of time wanted, in contrast to the trade of the simply 20 grippers that’s fast as compared.

Thought by way of to the tip

With a purpose to significantly pace up the conversion course of as an entire, KHS has not simply simplified the person work steps concerned but in addition the idea governing your complete process.

“We began out by analyzing how the operators work,” mentioned Arne Andersen, stretch blow molding product supervisor. “On this foundation we then thought-about how all duties could possibly be made simpler and arranged as completely as attainable, paying explicit consideration to the ergonomics. Magazines had been thus put in that cease the operator having to repeatedly abandon the machine to fetch and carry change elements, for instance. We additionally changed the grippers to scale back the variety of screws that should be loosened. On the identical time, newly developed mandrel heads are actually used that may be merely eliminated by urgent a launch spring. This course of was rather more advanced.”

On this case, KHS consciously went for an method that thought all the particular processes by way of to the tip primarily based on precise buyer necessities, Andersen emphasised: “We aimed to realize the very best enchancment inside the shortest attainable time.”

KHS managed each: because of the straightforward neck change, the time wanted for 2 operators to transform the KHS InnoPET Blomax16 stretch blow molder, as an illustration, has now been minimize by an excellent two thirds to roughly simply 86 minutes, together with the preform infeed. Because the PET bottles in a block just like the KHS InnoPET BloFill are held and conveyed by their necks all through your complete machine, not solely the stretch blow molder but in addition the filler has been developed additional as a way to shorten conversion instances.

The capper was one explicit space of focus, the place the cone chargeable for lifting and shutting the bottles must be changed manually. No conversion is required relating to the screw cap, nevertheless, as there are two cap feeds: one for every neck diameter within the respective format.

Better flexibility, much less space for storing

Andersen is satisfied that the brand new neck change choice will give beverage producers a lot higher flexibility, as they’ll now additionally run a lot shorter manufacturing cycles for bottles with totally different necks and due to this fact scale back their warehousing effort accordingly.

“A few of our prospects produce simply in time; which means that the completed containers are loaded straight onto the truck with none interim storage. The drastically diminished conversion time will now allow filling operations like these to alter necks extra incessantly; they thus revenue from completely new choices of their manufacturing planning.”

The identical goes for converters who can now produce the widely smaller batches for his or her prospects (usually in very totally different bottles) on a single line rather more effectively. The primary prospects in Asia who’re already utilizing the fast neck change developed by KHS are extraordinarily happy with the quantity of effort and time they save. This retrofittable choice has thus earned loads of reward from KHS’ purchasers on this area.

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