Streckblasmaschine

SIPA

Rotary stretch blow molding machine for blowing PET bottles from preforms. A tilting device is used to unload preforms from a container into the preform feed hopper. From there, the preforms are conveyed via an ascending belt with electronically controlled speed and are delivered, via chute and loading starwheel, in a uniform orientation to the blow molding machine. The shape and size of the preforms are checked and defective preforms are ejected before they are fed to the heating ovens by a mechanical starwheel. In the heating ovens, the preforms are preheated with infrared lamps. For a symmetrical heat distribution, the preforms are continuously rotated during this process. Fans prevent overheating of the outer surface. Finally, preform temperatures are checked with an optical pyrometer. Grippers handle the loading and unloading of preforms to/from the blowing carousel. The blowing unit uses 'crocodile molds', where stretching along the longitudinal axis is assisted by a stretching rod. The preforms are then blow-molded into PET bottles. The stretch-blown bottles are removed from the cavities by grippers and conveyed to the discharge station.

Machine (additional): Rotary blow molding machine
Power: 58 kW
Number of cavities: 8
Number of bottles discharged per stop: 202
Blowing pressure: 30 bar
Voltage: 400 V
Frequency: 50 Hz
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Water: 4 bar
Compressed air: 360 Nm3/h at 7 bar
Formats: 0.5 l; 1.0 l; 1.5 l PET bottles
Equipment: Preform feed hopper with tilting device for containers, ascending belt conveyor for preforms, preform inspection, heating ovens, blowing carousel, bottle discharge station, screen-based visualization
Weight: 16,700 kg

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