4-cavity PET blow moulding machine 3600BPH

Key Performance

• Output: 3600 bottles/hour (BPH)

• Cavities: 4

• Product: 450ml PET bottle, 35g weight

• Cycle time:

  • 3600 BPH ÷ 3600 sec/h = 1 bottle/sec

  • 4 cavities per cycle = 0.25 cycles/sec → 4.0 sec per cycle

• Drive: Servo or electro-hydraulic (depending on configuration)

• Blow air pressure: 0.7–1.2 MPa (7–12 bar)

• Heating: Multi-zone infrared/shortwave preheater (8–14 zones independent control)

System Components

1) Blow Moulding Machine

• Structure: 4 cavities, fast clamping, interchangeable moulds

• Clamping system: Hydraulic or servo, ensures stability & prevents bottle neck deformation

• Moulds: High-strength alloy steel (H13 or equivalent), water-cooled, quick-change design

• Stretching unit: Servo-controlled stretch rods with programmable stroke & speed

• Blow system: Main blow, pre-blow, and exhaust with pressure sensors & safety valves

• Control system: PLC + touch screen (HMI), multi-language, recipe management

• Safety: Door interlock, emergency stop, overload protection, CE/ISO compliance

2) Preform Heating Oven

• Multi-zone independent infrared heating (8–14 zones)

• Preform rotation for uniform heating

• Temperature range: 90–120 °C (depending on preform material)

• Adjustable heating profile for wall thickness distribution

3) Leakage Tester (Air Tightness)

• Method: Pressure decay or differential pressure detection (fast & non-destructive)

• Process: Bottle clamped → pressurized → hold for short time → monitor pressure drop → pass/fail judgment → NG bottle rejected automatically

• Sensitivity: Adjustable threshold to detect micro leakage or cracks

• Speed: 1–2 sec per test, synchronized with line speed

4) Automatic Counting & Bagging System

• Function: Counts finished bottles, groups, packs into bags, seals automatically

• Bagging type:

  • Pre-made bags (automatic opening + filling) OR

  • Roll film form-fill-seal system

• Capacity: Matches 3600 BPH line speed; grouped packing (e.g., 6, 12, or custom bottles/bag)

• Options: Date/batch printing, nitrogen flushing, palletizing connection