Composition of a Fully Automatic PET Blow Molding Machine

A fully automatic blow molding machine is typically composed of several core modules that work together to achieve fully automated production from preform loading to finished bottle output:

1. Automatic Preform Loading System
Automatically feeds preforms into the unscrambler, ensuring continuous material supply and reducing manual intervention.

2. Preform Unscrambling and Feeding System
Positions and orients preforms correctly, then delivers them steadily and accurately into the heating oven through a controlled feeding mechanism.

3. Infrared Heating Oven
Uses infrared lamps to heat preforms uniformly to the required stretching temperature. Features multi-zone temperature control to adjust heating profiles according to different bottle designs.

4. Neck-Handling Transfer System
Transfers heated preforms through a neck-support system, ensuring the bottle neck remains intact and deformation-free before entering the mold.

5. Stretch-Blow Molding System
The core workstation consisting of:

• Mold clamping mechanism

• Stretching rod system

• High-pressure blowing system
  This system stretches and blow-forms the preform into the final bottle shape inside the mold.

6. High-Pressure Air Supply System
Provides the required 25–40 bar high-pressure air for blowing, supported by compressors, air tanks, filters, and optional heat-regeneration drying units.

7. Cooling System
Ensures temperature stability for molds and machine components, including chillers and optional mold temperature controllers.

8. Mold System
Includes blow molds, base molds, and guiding components that determine the bottle’s shape, capacity, and appearance.

9. Bottle Discharge and Conveyor System
Automatically transfers finished bottles out of the blow molding area, and can be connected to filling and packaging equipment for integrated production.

10. PLC Control System
The control center of the machine, responsible for temperature regulation, blow sequence control, motion programming, fault alarms, and one-touch operation via a user-friendly HMI interface.