Düsseldorf, Germany — Arburg GmbH + Co. KG is moving into high-volume cube molding, where a revolving four-faced mold spins between two injection units, turning out a multicomponent part.
Arburg has been able to produce parts with cube molds for about five years. But the Allrounder Cube press shown at K 2016 is a major departure into very high-volume molding: Turning out two-component closure caps on a 32-by-32 cavity mold, on an 8.5-second cycle. The clamping force is 290 metric tons. Arburg also is offering an Allrounder Cube in 460 metric tons.
Arburg is running a cube mold from Foboha GmbH in Haslach, Germany, a city less than an hour's drive from Arburg headquarters in Lossburg in the Black Forest.
The part being molded at K 2016 is a flip-top cap for a bottle of Pril, the popular German brand of hand dishwashing soap. Both components are polypropylene, but the screw-on base is red and the flip-top is blue.
“It's a typical part where the cost-per-part counts,” said Gerhard Böhm, Arburg's managing director of sales. “They run such programs for several years. Once they change to such a part, for example, they run it for six or seven years continuously.”
One injection unit is mounted on the machine base. The other rides on the clamp. Shot capacities are eight ounces and 16 ounces.
The machine is a hybrid press that uses electric power and servo-driven hydraulics, with an accumulator for the fast molding of the closures.
Friedrich Kanz, president of Arburg Inc. in Rocky Hill, Conn., said the Allrounder Cube should sell well in the United States, a big packaging market that demands large-volume production.