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SIPA

Rotary stretch blow molding machine for blowing PET bottles from preforms. Preforms are poured from a container into the feed hopper via a tilting device. From there, the preforms are fed out via an ascending belt with electronically controlled speed and are transported to the blow molding machine in a uniform orientation via a chute and loading star wheel. The shape and size of the preforms are checked and defective preforms are ejected before they are fed to the heating boxes via a mechanical star wheel. In the heating boxes, the preforms are preheated with infrared lamps. They are continuously rotated to ensure symmetrical heat distribution. Fans prevent overheating on the outside. Finally, the preform temperatures are checked using an optical pyrometer. Grippers feed the preforms to the blow wheel and remove them from it. The blow molding unit works with “crocodile molds,” in which expansion along the longitudinal axis is supported by a stretching rod. The preforms are then blown into PET bottles. The stretch-blown bottles are removed from the cavities by grippers and conveyed to the ejector.
Additional title: rotational molding machine
Capacity: 18000 bo/h
Number of cavities: 8 pcs.
Number of bottles to be ejected per stop: 202 pcs.
Blow pressure: 30 bar
Power: 58 kW
Voltage: 400 V
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Frequency: 50 Hz
Water: 4 bar
Compressed air: 360 Nm3/h at 7 bar
Weight: 16700 kg
Formats: 0.5 l; 1.0 l; 1.5 l PET bottles
Features: Preform feed hopper with tilting device for containers, inclined belt conveyor for preforms, preform inspection, heating boxes, blow wheel; bottle ejector; visualization on screen