4-Station One-Stage
ISBM-Maschine

Integrate injection, temperature conditioning, stretch blow molding, and ejection into a single continuous rotary platform — producing finished PET/PETG bottles directly from raw resin with zero intermediate handling.

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6 Machine Models Available
CE & FDA Certified
24-Hour Quote Response
Sydney, Australia HQ
Servo-Driven Technology

Technology Overview

What Is a 4-Station One-Stage ISBM Machine?

A 4-station one-stage ISBM machine (Injection Stretch Blow Molding) consolidates the entire plastic bottle manufacturing process — from raw resin to finished container — on a single rotary platform with four dedicated workstations operating simultaneously.

Unlike two-stage (reheat-blow) systems that require separate preform production and a reheating step, the one-stage process retains residual injection heat through a precision conditioning station before stretch blow molding. This eliminates secondary heating energy, reduces contamination risk, and dramatically tightens tolerances on neck geometry and wall thickness.

Why the 4-station configuration matters: The additional temperature conditioning station — absent in 3-station designs — gives operators precise, zoned thermal control over the preform before stretching. The result is superior biaxial molecular orientation, higher tensile strength (up to +30% over traditional processes), and compatibility with complex narrow-neck bottle geometries.

20–30% lower energy consumption versus two-stage reheat-blow alternatives — no secondary preform reheating required.
Wall thickness uniformity ±5% — achieved through servo-controlled injection pressure and precision conditioning.
Material yield 95%+ — inline scrap recovery with no external preform logistics or storage overhead.
Compact footprint — up to 40% less floor space compared to separated injection + blow molding lines.
PET / PETG Raw Resin
Station 1

Injection Molding

PET plasticized → injected into preform mold → cooled on core rod

Station 2

Temperature Conditioning & Tail Trim

Gate sprue removed · Zoned reheating · Neck kept cool

Station 3

Stretch Blow Molding

Axial stretch rod + radial high-pressure blow · Biaxial orientation

Station 4

Cooling & Ejection

Finished container output → pristine and ready for filling line

 ✓ Finished Container — ready for filling line
PROCESS ENGINEERING

Inside Each Station: Precision at Every Step

Each of the four workstations in a one-stage ISBM machine operates simultaneously on a separate set of core rods, enabling continuous production with zero downtime between cycles (typical cycle time: 10–30 seconds).

1
INJECTION MOLDING

Preform Injection

PET granules are melted in a high-precision servo-driven screw barrel and injected under controlled pressure into the preform (parison) mold cavity. The polymer flows around the core rod, forming a threaded neck finish and a thick-walled tube body. Mold temperature is precisely controlled to manage crystallinity.

Temperature control±1°C
Screw speedUp to 180 r/min
Injection force55–650 kN
2
CONDITIONING & TAIL TRIM

Thermal Profiling

The still-hot preform rotates to the conditioning station where a servo trim unit removes the injection gate sprue (tail). Zoned ceramic heating elements then create a deliberate temperature gradient: the bottle body is brought to the optimal blow temperature (90–110°C for PET) while the neck is actively cooled to preserve thread geometry.

Blow zone temp.90–110°C (PET)
Neck coolingActive, independent
TrimmingServo precision
3
STRETCH BLOW MOLDING

Biaxial Orientation

With blow mold halves clamped around the preform, a servo stretch rod descends at up to 400 mm/s for axial elongation. Simultaneously, high-pressure air (2.0–3.5 MPa) is injected to radially expand the preform against the mold cavity wall. This simultaneous biaxial stretch aligns PET molecular chains, generating superior clarity, barrier properties, and mechanical strength.

Stretch speedUp to 400 mm/s
Blow pressure2.0–3.5 MPa
Position accuracy±0.1 mm
4
COOLING & EJECTION

Set & Release

Chilled water circulates through mold cooling channels to rapidly solidify the bottle in its final shape (cooling time typically 5–20 seconds). Once the mold opens, the finished container is stripped from the core rod — optionally via integrated robotic arm — and transferred to the downstream conveyor for inspection, labelling, or filling.

Cooling water temp.20–25°C
Cooling time5–20 seconds
Mold change≤ 60 minutes
PRODUCT RANGE

All 4-Station One-Stage ISBM Machine Models

Six production-ready models spanning small-batch precision to high-volume industrial output. All carry CE and ISO certification and are backed by direct factory engineering support.

Technology Comparison

3-Station vs 4-Station vs 6-Station ISBM: Which Is Right for You?

All three configurations are one-stage systems — but the number of stations determines thermal flexibility, achievable bottle complexity, and production throughput. Here is how they differ.

Feature / Criteria 3-Station ISBM Most Popular 4-Station ISBM 6-Station ISBM
Station Layout Inject → Stretch-Blow → Eject Inject → Condition + Trim → Stretch-Blow → Eject Inject → Condition 1 → Condition 2 → Blow 1 → Blow 2 / Cool → Eject
Thermal Conditioning ✕ None (residual heat only) ✓ 1 dedicated zone ✓✓ 2 dedicated zones
Gate / Tail Trimming ✕ Not standard ✓ Servo tail trim ✓ Servo tail trim
Bottle Geometry Wide-mouth, simple shapes Narrow-neck, complex profiles, cosmetics High-complexity, asymmetric, multi-layer
Wall Thickness Control ◑ ±8–10% ✓ ±5% or better ✓ ±3–5%
Hourly Output (single cavity) 800–1,200 bottles/hr 600–1,200+ bottles/hr 1,500–3,000+ bottles/hr
Neck Finish Precision ◑ Standard ✓ High precision ✓ High precision
Materials PET, PP (wide-mouth) PET, PETG, PP, PC PET, PETG, PP (multi-layer possible)
Machine Footprint Smallest Compact–Medium Large
Capital Investment Lower Medium — best ROI Higher
Ideal For Short runs, wide jars, medical caps Beverages, cosmetics, pharma, food, household — versatile all-rounder High-volume beverage plants, industrial output
Not sure which station count suits your application? Contact our engineers for a free consultation.
ENGINEERING ADVANTAGES

Why One-Stage 4-Station Technology Outperforms Alternatives

Data from production lines deploying our 4-station ISBM machines versus conventional two-stage and three-station systems.

01

Integrated Production, Zero Contamination

All four process stages complete on a single machine without human intervention or preform storage. Eliminates exposure to airborne particles and handling damage that compromises pharmaceutical and food-grade container integrity.

100% closed-loop — no external preform transfer
02

Superior Biaxial Molecular Orientation

Simultaneous axial and radial stretching under servo-controlled tension aligns PET polymer chains in both directions. The result is measurably better mechanical performance with less material per bottle.

+30% tensile strength vs non-oriented processes
03

20-30% Lower Energy Consumption

Retaining residual injection heat eliminates the secondary oven stage required by two-stage reheat-blow systems. Nano far-infrared screw heating further reduces barrel energy draw at steady-state production.

-30% kWh vs equivalent 2-stage output
04

Precision Wall Thickness Control

Servo injection profiling combined with dedicated temperature conditioning produces a repeatable preform cross-section. Wall thickness deviation is consistently held within ±5% — critical for lightweight bottle designs and CO2 barrier performance.

±5% wall thickness uniformity
05

Material Yield Exceeding 95%

Gate sprues removed at Station 2 are directly reground and recycled inline. No off-machine scrap logistics, no inventory of rejected preforms. Material utilisation targets above 95% are routinely achieved in production.

95%+ raw material utilisation rate
06

Fast Mold Changeover

Standardised V4 series tooling interfaces and guided mold clamp systems enable complete preform and blow mold changeovers in under 60 minutes, minimising unplanned downtime for SKU variety production.

≤ 60 min full mold changeover time
INSTALLATION GUIDE

Machine Layout & Auxiliary Equipment

A complete 4-station ISBM production line requires coordinated auxiliary systems. The diagram below shows the standard layout and equipment configuration used across our V4 series.

Ref. Gerätebezeichnung Funktion
A High-Pressure Air Compressor Supplies 2.0–3.5 MPa air for the blow molding station
B Gasspeichertank Buffers compressed air to stabilise blow pressure
C Cold Dryer & Filter Removes moisture and particulate from compressed air stream
D Kühlturm Supplies circulating water to the industrial chiller
E Industriekühler Maintains mold temperature at 20–25°C for stable bottle formation
F Low-Pressure Air Compressor Powers pneumatic actuators and conveyors
G Formtemperaturregler Fine-tunes mold surface temperature for consistent part quality
H ISBM-Maschine Core 4-station production unit
ICH Mechanischer Arm / Roboter Automates bottle ejection and transfer to downstream conveyor
A HP Compressor
B Gas Tank
C Cold Dryer
D Kühlturm
H ISBM-Maschine
E Industriekühler
F LP Compressor
G Mold Temp Ctrl
ICH Robotic Arm

Standard layout — exact placement varies per facility. Full layout drawings provided post-order.

MATERIAL COMPATIBILITY

Compatible Materials & Bottle Types

Our 4-station ISBM machines are engineered primarily for PET and PETG, with specific models supporting PP and PC for specialised applications.

PET

Polyethylene Terephthalate

Beverages (CSD, water, juice), food packaging, pharma. High clarity, excellent CO2 and O2 barrier, fully recyclable. Bottle sizes 5ml–20L.

PETG

Glycol-Modified PET

Cosmetics, medical devices, laboratory bottles. Superior impact resistance, enhanced clarity vs PET, easier sterilisation compatibility.

PP

Polypropylene

Hot-fill containers (fruit juice, tea), shampoo, conditioner, mascara. Heat-resistant to 120°C+, strong chemical resistance, good aesthetic options.

PC

Polycarbonate

Baby bottles, reusable sports vessels, optical-quality containers. Very high impact strength, glass-like transparency, broad temperature range.