Rotary stretch blow molding for PET bottles
The Tofflon Huihe CP3-6: six blowing cavities and up to 13,200 bottles per hour, for PET containers from 0.25 to 2.5 liters. Stand-alone, or as the blowing module of a blow-fill-cap block.
* Output depends on the preform and the bottle design.
From preform to finished bottle
The CP3-6 is a fully automatic, two-step rotary stretch blow molding machine. It suits mid-volume lines and plants that run many bottle formats, for water, carbonated soft drinks, juice and functional drinks.
Each of the six stations carries a complete 150 mm mould set, which gives room for round, square and shaped containers up to about 125 mm in diameter while keeping the blowing wheel compact.
- Feed and heatPreforms are fed automatically and heated in an infrared oven with individually controlled zones.
- Stretch and blowPreforms transfer to the six-station rotary blowing wheel, where they are stretched and blown into finished PET bottles.
- DischargeBottles leave on an air conveyor, or transfer directly into a filler.
Key features
Rigid structure
A welded machine base and a precision-machined rotary wheel keep mould alignment stable at full speed, for a service life beyond 20 years.
Low energy consumption
A near-infrared oven with reflector design, and optional blow-air recovery, cut electricity and compressed-air demand per bottle.
Flexible blowing process
Pre-blow, high-blow and exhaust timing adjust independently, and zone-by-zone heating profiles are stored with each recipe.
Simple operation
A touch-screen HMI with recipe management and fault diagnostics, plus a remote-access module for the manufacturer's service engineers.
Bottle design support
Huihe's bottle-design team develops bottle shapes and preform pairings, with broad experience in lightweight bottles.
Broad PET capability
Ordinary, heat-resistant, medium-temperature and aseptic PET bottles on one platform.
Application fields
Bottled water
Still and sparkling, with lightweight preforms.
Carbonated soft drinks
Petaloid bases and pressure-resistant designs.
Tea, juice and functional drinks
Hot-fill, heat-set and moderate-temperature bottles.
Aseptic beverages
Aseptic PET bottles for aseptic filling lines.
Technical specification
| Number of cavities | 6 |
| Mould width (pitch) | 150 mm, 6 sets |
| Container volume range | 0.25 to 2.5 L |
| Maximum container diameter | 125 mm |
| Maximum container height | 340 mm |
| Neck finish | Up to 38 mm, for example PCO 1881, 29/25 and 38 mm |
| Rated output, containers up to 0.6 L | Up to 13,200 bottles per hour (2,200 per cavity) |
| Rated output, containers 1.0 to 1.5 L | Up to 12,000 bottles per hour |
| Rated output, containers 2.0 to 2.5 L | Up to 10,800 bottles per hour |
| Preform material | PET, virgin or rPET blends; preform weight about 8 to 90 g |
| Bottle types | Ordinary, heat-resistant (hot-fill), medium-temperature, aseptic |
| Heating oven | Near-infrared, 9 heating layers per module, individually controlled; preform neck cooling |
| Stretching | Servo-driven stretch rod, position and speed adjustable per recipe |
| Mould change | Quick-release shell mounts; typical full changeover 45 minutes or less |
| High-pressure blowing air | 3.0 to 4.0 MPa, oil-free, dew point 3 °C or lower |
| High-pressure air consumption | About 12 to 16 Nm³/min at rated output, design dependent |
| Low-pressure control air | 0.7 to 0.8 MPa |
| Supply | 3 × 380 V / 50 Hz; other voltages on request |
| Installed power | About 85 kW |
| Typical running load | About 55 kW |
| Mould cooling water | 7 to 12 °C chilled, about 6 m³/h |
| Machine footprint (L × W × H) | About 5.8 × 3.2 × 3.4 m |
| Machine weight | About 12 t |
| Bottle discharge | Air conveyor or direct transfer to filler |
| Control system | PLC with 15-inch colour touch-screen HMI |
| Connectivity | Built-in remote diagnostic module (IoT / 4G) |
| Safety | Interlocked guarding, CE-compliant design |
Values are indicative for a standard configuration and are confirmed in the project technical proposal after review of the preform, bottle design, product and utilities. Output figures assume a suitable preform and a well-designed container; heat-set (hot-fill) bottles run at reduced speed. Machine dimensions exclude preform feeding and air conveyor.
Options and line integration
- Blow-fill-cap block: direct coupling to a Huihe rinsing, filling and capping monoblock for water, carbonated drinks, hot fill, moderate-temperature or aseptic filling
- Heat-set (hot-fill) package: heated moulds and an extended oven for heat-resistant PET bottles
- Blow-air recovery: recycles high-pressure exhaust air to the low-pressure and pre-blow circuits
- Preform inspection: vision inspection at the oven infeed, with automatic rejection
- Additional mould sets: shells and bases for each bottle format, including custom and lightweight designs
- Air compressor system: matched high- and low-pressure compressors with dryer and filtration
- Air conveyor: neck-guided empty-bottle conveying to the filler
- Full turnkey scope: water treatment, beverage pre-treatment, labeling, packing and palletizing
How a project runs
- Initial evaluation
- Parameter design
- Proposal confirmation
- Project execution
- Operator training
- After-sales service
Service and support
Remote maintenance
Built-in remote modules support installation, commissioning and maintenance. Production status, efficiency and alarms can be monitored from anywhere, so the cause of an alarm is found and resolved quickly.
Round-the-clock response
A 24-hour, 7-day customer service hotline, professional support, spare-parts supply and customized service packages.
System training
- Safety for production-line operations
- Machine composition, functions and process design
- Hands-on time in the Huihe workshop
- Operation, maintenance and troubleshooting, with sign-off for key personnel
About Tofflon Huihe
Jiangsu Huihe Packing Machinery Co., Ltd. is the liquid and beverage packing machinery arm of Tofflon Group (Shenzhen Stock Exchange: 300171), producing at a 200,000 m² base in Dongtai, Jiangsu Province. Huihe reports projects for Coca-Cola, Pepsi, Zhongfu Group, Genki Forest, Yanghe Group, Charoen Pokphand Group and Yanjing Group, from design through installation, training and after-sales service.
Planning a PET bottle line?
Tell us your bottle sizes, preform and target output, and we will come back with a CP3-6 proposal, stand-alone or as a blow-fill-cap block.