CHICAGO — PET preform mold maker Electra Form Inc. has started making PET blow molding machines at its headquarters in Vandalia, Ohio.
Electra Form displayed its first blow molding machine at NPE 1997, the RSB series of reheat stretch blow molders.
Roger Tallman, general sales manager, said Electra Form's main business remains making high-cavitation molds for injection molding preforms for the soft drink bottle market. But with the RSB blow molding machines, Electra Form has diversified into custom PET container markets.
RSB machines run one-, two- or four-cavity molds. The typical Electra Form preform mold has 48 or more cavities.
According to the company, the one-cavity RSB-1 machines can blow mold as many as 1,500 bottles an hour. The RSB-2, with two cavities, can make 3,000 bottles an hour. A four-cavity RSB-4 can pump out 6,000 bottles an hour.
The machine has an Allen-Bradley PLC 5/03 machine sequence controller with a touch screen.
A slide-out clamp assembly allows quick mold changes. Oven lamps can be adjusted individually. The machine uses electric or pneumatic actuators instead of hydraulics.
Separately, Tallman said Electra Form no longer is promoting its preform system alliance with BMB SpA, an Italian injection molding machine manufacturer. Under the agreement, announced two years ago at K'95 in Germany, BMB would supply PET preform injection presses. Electra Form added its robotic cooling system, which moves preforms through a cooling cell that uses water-cooled tubes.
By cooling preforms outside of the mold, the system cuts molding cycle times.
Tallman said Electra Form still makes the cooling system, but rather than linking solely with BMB, company officials have decided to sell it as a stand-alone system that Electra Form can retrofit onto any preform press.