0.05mm
Pitch repeatability
Blow Molding
Variable Pitch Blow Molding Machine
iBottling variable pitch PET blow molding machine with servo-driven pitch adjustment for faster changeovers and lower energy consumption. Automatically adjusts preform spacing to handle multiple bottle formats on a single platform — delivering up to 12,000 BPH with 50% energy savings versus traditional blow molders.
Servo-driven variable pitch (0.05mm repeatability)Servo-driven variable pitch (0.05mm repeatability)
50% energy savings vs traditional blow molders50% energy savings vs traditional blow molders
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Since 1995 · CE & ISO 9001 · 150+ countries
Built for beverage packaging project teams
FAT checklistBottle sample reviewMold cavity verificationCE documentation planQuality file available
CE documentation prepared by scopeQuality files available with the project file setBottle format flexibilityPET preform specifications
Total cost of ownership
Variable Pitch Technology: Faster Changeovers, Lower Energy
A variable pitch blow molding machine gives you the flexibility to run multiple bottle sizes on one platform without manual pitch adjustments. The servo-driven pitch mechanism automatically repositions preforms between cavities — reducing changeover time from hours to 30 minutes and cutting energy consumption by 50% compared to fixed-pitch systems.
Energy Savings
50%
vs traditional blow molders
Changeover Time
30 min
dual-arm quick-change system
Variable Pitch Blow Molding Machine — Key Specifications
- Machine type
- iBottling Variable Pitch PET Stretch Blow Molder (servo-driven)
- Cavity count
- 6-cavity standard (4/8/10 cavity configurations available)
- Output
- Up to 12,000 BPH (600ml); 15,500-16,500 BPH (8-cavity variant)
- Bottle range
- 200ml – 2,000ml PET bottles
- Pitch adjustment
- Servo-driven, 0.05mm repeatability, automatic format change
- Heating system
- 4 infrared radiant heating boxes, 24 quartz lamps, zone-controlled
- Installed power
- 36 KW (actual usage 18 KW — 50% energy savings)
- Air system
- High pressure 6m³ + Low pressure 0.8m³
- Mold changeover
- 30-minute dual-arm quick-change system
- Control
- 10.4-inch HD HMI touchscreen with real-time monitoring
Bottle Sample FAT
Mold Cavity Verification
PLC/HMI Recipe Backup
Commissioning Support PlanWhy Choose Variable Pitch Blow Molding?
Ideal for bottling plants producing multiple bottle formats who need fast format changeovers without sacrificing output speed or bottle quality.
Pitch flexibility
Servo-driven variable pitch adjusts preform spacing automatically, so one platform handles 200ml to 2L bottle formats without manual plate changes.
Energy-efficient heating
Four infrared radiant heating boxes with zone-controlled quartz lamps cut energy use by 50% versus fixed-pitch blow molders while maintaining uniform preform temperature.
Fast format changeover
Dual-arm quick-change system swaps molds in 30 minutes, with the servo pitch mechanism auto-adjusting to the new bottle format — no manual pitch plate replacement.
Key Advantages
12,000
Bottles per hour
30 min
Mold changeover
How Variable Pitch Blow Molding Works
The variable pitch blow molding cycle transforms PET preforms into finished bottles through three stages: servo-fed preform loading, infrared heating with variable pitch spacing, and stretch-blow forming. Upstream preforms can come from your PET bottle blowing machine , while downstream coding and bundled discharge can connect to a laser coding machine and a shrink wrapping machine .
Preform heating
- Preform hopper feeds PET preforms onto the mandrel chain with servo-driven step feeding for consistent flow.
- Infrared heating oven rotates preforms 360° through four zone-controlled heating boxes, heating to 100-120°C.
- Variable pitch servo mechanism adjusts preform spacing from 48mm to 76-120mm for the mold cavity pitch.
Stretch blow molding
- Stretch rod descends from above, axially stretching the heated preform to initiate bottle forming.
- High-pressure blow air (30-40 bar) inflates the preform against the aluminum mold cavity walls.
- Six-cavity vertical clamp with servo toggle mechanism completes bottle formation in 0.3-0.5 seconds per cycle.
Bottle discharge
- Finished PET bottles release from the mold clamp onto the discharge conveyor for downstream transfer.
- Bottles transfer to air conveyor or soft-belt conveyor for integration with filling line operations.
- Format changeover parts are swapped by bottle family, with servo pitch auto-adjustment eliminating manual reconfiguration.
Compliance & Global Standards
- ConformityCE documentation prepared for the quoted scope
- Quality systemQuality documentation available with the project file set
- Machine safetyGuarding, interlocks, emergency stop logic, and access points reviewed to site standard
- Plant environmentStainless enclosure and washdown tolerance selected for the packaging-room duty
The quoted variable pitch blow molder file set ties CE declarations, guarding notes, preform specification checks, and bottle-sample acceptance to the verified servo pitch platform, infrared heating calibration, and tier-1 component BOM.
Global tier-1 components
Variable pitch blow molding projects depend on servo precision and thermal uniformity, so the BOM names the TRIO servo motors (UK), Siemens electrical components (Germany), SMC pneumatics (Japan), and infrared heating modules that protect bottle quality and output consistency across format changes.
Siemens PLC and HMI. Sequencing, safety, line integration. Commissioning footprint aligns with servo-driven variable pitch control.
Schneider Electric Low-voltage train: inverters, motor protection, switchgear — sized to site voltage and blow molder load profile.
SMC Blow-valve pneumatics, stretch-rod actuation, FRL assemblies, and high-pressure air cylinders with preventive-maintenance documentation.
Festo Alternate pneumatic stack where the plant standard is Festo. Same FAT/SAT pack and interface as the primary SMC configuration.
| Item | Specification |
|---|---|
| Machine series | iBottling Variable Pitch Servo Blow Molder Series |
| Output range | Up to 12,000 BPH (6-cavity, 600ml); scalable to 16,500 BPH (8-cavity) |
| Bottle capacity range | 200ml – 2,000ml PET bottles |
| Cavity configuration | 6-cavity standard; 4/8/10 cavity available per project scope |
| Variable pitch mechanism | Servo-driven timing belt with 0.05mm repeatability; automatic preform spacing adjustment |
| Heating system | 4 infrared radiant heating boxes, 24 quartz lamps, flip-top maintenance design, 30% energy reduction |
| Stretch-blow control | Dual servo: stretching rod + high-flow pneumatic valves with pressure compensation |
| Mold changeover | 30-minute dual-arm quick-change; CNC aerospace aluminum mold bodies with thermal management |
| Installed power | 36 KW installed / 18 KW actual (50% energy savings vs traditional) |
| High pressure air | 6 m³ consumption |
| Low pressure air | 0.8 m³ consumption |
| Cooling system | 7 HP chiller integrated |
| Machine weight | 6,000 kg (6-cavity configuration) |
| Tier-1 components | TRIO servo motors (UK), Siemens electrical (Germany), SMC pneumatics (Japan) |
Layout and Integration
The variable pitch blow molding machine integrates into your bottling line with compact footprint, standard utility connections, and flexible placement relative to upstream preform supply and downstream filling operations.
DWG REF: VP-BLOWMOLD-PLANT-01
Bottle quality & throughput
Reduce energy consumption, changeover waste, and reject rates with servo-driven variable pitch blow molding technology.
Energy and air savings
Infrared radiant heating with zone control and servo-driven systems cut energy consumption by 50%, while optimized high-pressure air management reduces compressed air waste.
Changeover material waste
Automatic servo pitch adjustment and 30-minute dual-arm mold changeover minimize scrap bottles during format transitions, reducing material waste per changeover event.
Variable Pitch Blow Molding Machine In Action
Acceptance should prove more than throughput: the variable pitch blow molder has to show stable preform heating, consistent bottle wall thickness, and repeatable format changeover across the full cavity range.
Acceptance proof basis — Acceptance proof basis — bottle samples, preform specs, and mold changeover verification for variable pitch blow molding
Exported to 150+ Countries24/7 Rapid Response SupportTurnkey Engineering Services
Get a Quote for This Machine
Since 1995 · CE & ISO 9001 · 150+ countries
FAQ — Variable Pitch Blow Molding Machine
What is variable pitch blow molding and how does it differ from fixed pitch?
Variable pitch blow molding uses a servo-driven mechanism to automatically adjust the spacing between preforms as they move through the heating and blow stations. This allows one machine to handle multiple bottle sizes without manual pitch plate changes — reducing changeover from hours to 30 minutes. Fixed pitch machines require physical pitch plate replacement for each bottle format.
What bottle sizes can the variable pitch machine produce?
The standard 6-cavity configuration handles 200ml to 2,000ml PET bottles with maximum bottle height of 240mm and maximum diameter of 70mm. Preform specifications (neck finish, weight, length) are confirmed from supplier data sheets during quotation.
How much energy does the variable pitch machine save?
The variable pitch platform with infrared radiant heating and servo-driven systems reduces energy consumption by approximately 50% compared to traditional fixed-pitch blow molding machines. Installed capacity is 36 KW with actual usage of 18 KW during production. Energy test data is included in the FAT documentation for RFQ scope verification.
What is the mold changeover time?
Mold changeover takes approximately 30 minutes using the dual-arm quick-change system. The variable pitch servo mechanism automatically adjusts preform spacing to the new bottle format — no manual pitch plate replacement required.
Which tier-1 components are used?
The machine uses TRIO servo motors (UK) for all spindle, gripper, stretch, and pitch adjustment drives; Siemens electrical components (Germany) for control and protection; SMC pneumatic components (Japan) for blow valves and air management. The complete tier-1 BOM is provided with FAT documentation during the RFQ process, with material certificates and integration scope confirmed per project contract.
