ISBM
one step blow machine
Compatible with Japanese ASB machine molds
What is Injection Stretch Blow Molding (ISBM)?
Injection Stretch Blow Molding (ISBM) is an efficient plastic container molding process widely used for producing high-precision, high-performance hollow plastic products. It combines three key steps: injection molding, stretching, and blow molding, all within a single machine, eliminating the need for intermediate processes. This results in significantly improved production efficiency and product consistency.
The process begins with injection molding, where the raw plastic material is injected into a mold to form a preform. The preform is then stretched to align the polymer molecules, which enhances the material’s strength and clarity. Finally, the blow molding step inflates the preform into the desired shape, typically producing bottles, jars, or other hollow containers.
ISBM is used to produce a wide variety of plastic products, including PET, PETG, PP, PC, Tritan, PS, ABS, and PLA materials, which are commonly used for making baby bottles, water bottles, pharmaceutical containers, cosmetics bottles, and various other products.
Working Principle of One-Step Blow Molding:
1. In One-Step Injection Stretch Blow Molding, the entire process—injection, stretching, and blow molding—takes place within the same machine.
2. The injection molding step creates a preform (the initial bottle shape).
3. The preform is then heated in the same machine (no need for separate reheating), which helps to conserve energy.
4. Stretching elongates the plastic, and the blowing step shapes it into the final bottle.
Differences Between 3-Station and 4-Station Machines:
3-Station Machine Includes:
- Injection molding station
- Preform heating, tail cutting, and pre-blowing
- Stretch-blowing station
4-station machine Adds:
- Injection molding station
- Preform heating, tail cutting, and pre-blowing
- Stretch-blowing station
- Take-out station for automatic removal of finished products
Contrast Form Of Single Step And Two-Step Technic
| Forming Method | Forming Process | Equipment Configuration | Artificial/Energy/Square | Product Quality | ||
|---|---|---|---|---|---|---|
| Single Step | Two stations | Three stations | Four stations | 1. Only one set machine to complete multiple bottle production; 2. Hot type embryo method |
Little | Not affect by damp, various kinds of shape and less pollution. |
| From bottle molding to blow molding | From bottle molding to stretch blow molding, no reheating is required | From bottle molding to transfer to heating station temperature control and then stretch blow molding | ||||
| From bottle molding to Blow molding | From bottle molding to stretch blow molding, no reheating is required | From bottle molding to transfer to heating station temperature control and then stretch blow molding | ||||
| Two Steps | Injection and blow molding are two separated process, separate heating is needed. | 1. Injection molding machine to complete preform production 2. Preforming, transportation lineup 3. Reheating stretch, product take out 4. Cold type embryo method |
More | Affect by damp, also shape and easy polluted | ||
ISBM Machines
EP-HGY50-V3-EV | 3-Station
EP-HGY250-V4 | 4-Station
EP-HGY250-V4-B | 4-Station
EP-HGY650-V4 | 4-Station
EP-BPET-94V3 | 3-Station
EP-BPET-70V4 | 4-Station
EP-BPET-125V4 | 4-Station
EP-HGYS150-V4 | 4-Station
EP-HGYS150-V4-EV | 4-Station
EP-HGYS200-V4 | 4-Station
EP-HGYS200-V4-B | 4-Station
EP-HGYS280-V6 | 6-Station
EP-ISBM Machine Moudel
Technical Features & Advantages of One-Step ISBM Technology
Compared to the conventional two-stage injection stretch blow molding (ISBM) process—where preforms are first injection-molded, cooled, stored, and later reheated for blowing—the one-step ISBM process integrates all operations into a single, continuous cycle within one machine. This integrated approach delivers significant technological and economic benefits:
Fully Integrated Production
Enhanced Hygiene & Reduced Contamination Risk
All operations occur in a sealed, controlled environment without human intervention. Eliminating intermediate handling prevents preform contamination, moisture absorption, and thermal deformation—critical for pharmaceutical, medical, and food-grade packaging requiring uncompromised sterility.
High Automation & Superior Productivity
Efficient High-Volume Manufacturing
Fully automated servo-electric/hybrid control systems deliver cycle times of 10–30 seconds per mold cavity. A single machine produces over 1 million high-quality containers annually, reducing labor dependency, floor space, and operational complexity—ideal for just-in-time production.
Exceptional Product Quality
Superior Mechanical Performance
Real-time closed-loop control achieves ±5% wall thickness uniformity and optimal molecular orientation. Biaxial stretching boosts tensile strength by 30%+, improving impact resistance and barrier performance. No secondary heating preserves polymer clarity for premium packaging.
Energy Efficiency & Sustainability
Reduced Costs & Environmental Impact
Eliminating preform reheating cuts energy consumption by 20–30%. On-site regrinding of waste materials achieves 95%+ material utilization, lowering raw material costs and aligning with circular economy principles and global sustainability goals.
Key Technical Differentiators
Closed-Loop Process Control
Real-time servo-driven axial stretching and radial blowing pressure control ensure consistent product quality across all production runs.
Energy Optimization
Removal of the energy-intensive reheating stage reduces operational costs while maintaining stable process parameters.
Material Circularity
Immediate on-site regrinding of sprues, runners and waste enables zero-waste production cycles for maximum efficiency.
Machine Layout
H. ISBM Machine
I. Mechanical Arm
A. High Pressure Air Compressor
B. Gas Storage Tank
C. Cold Dry Filter
D. Cooling Tower
E. Chiller
F. Low Pressure Air Compressor
G. Mold Temperature Controller
Process of Injection Stretch Blow Molding (ISBM)
1. Injection
Preform Molding
Molten PET resin is injected into a mold cavity to form a "test-tube" like preform with a finished neck.
2. Conditioning
Tail Cutting / Heat Preservation
Excess material (tail) is removed. The preform temperature is equalized to ensure optimal stretching elasticity.
3. Stretch Blow
Moulding & Shaping
A rod stretches the preform vertically while high-pressure air expands it horizontally against the mold walls.
4. Take-out
Ejection & Discharge
The mold opens and the finished bottle is ejected via robot or gravity for packaging.
What is the difference between ISBM and EBM?
Applications:
ISBM: This method is used extensively for producing high-precision, smaller bottles such as cosmetic, pharmaceutical, and beverage containers
BM: EBM is preferred for producing larger containers, such as industrial bottles and tanks, that may not require the same level of precision.
Each process has its strengths and is suited to different product types based on the needs for precision, material usage, energy efficiency, and production speed.
Process Flow:
ISBM: The ISBM process involves three stages: injection molding to create a preform, stretching the preform, and then blow molding it into the final shape. This process happens in a single machine, without the need for reheating the preform, making it more energy-efficient .
EBM: EBM involves the extrusion of plastic material into a parison, followed by inflating it within a mold to create the desired shape. The process is generally simpler but may require more separate operations, including reheating.
Energy Efficiency:
ISBM: ISBM offers improved energy efficiency as the preform is directly used for blowing without needing secondary heating, reducing energy consumption by around 40%
EBM: The EBM process may consume more energy, especially because of the need for reheating the extruded parison before blowing.
Product Quality:
ISBM: ISBM tends to produce products with better dimensional stability, higher strength, and improved barrier properties due to the molecular orientation during stretching
EBM: EBM products typically have slightly lower precision, but it is better suited for larger, more complex shapes like hollow containers and industrial packaging.
Production Speed:
ISBM: ISBM systems are generally faster in terms of overall molding and suitable for high-volume production .
EBM: EBM is typically slower, but it provides more flexibility in handling a variety of product shapes and sizes.
Bottle Sample Display
Cosmetic plastic bottles
1. Cosmetics (serums, lotions, perfumes)
2. Skincare products (face masks, face creams)
3. Personal care products (shampoos, body washes)
4. Pharmaceuticals or health supplements (oral liquids, sprays)
Daily chemical packaging bottles
1. Cosmetics (serums, lotions)
Personal care products (shampoo, shower gel)
2. Food and beverages (juices, mineral water)
3. Pharmaceuticals and health products (oral liquids, eye drops)
4. Laboratory reagent bottles
Branded packaging bottles
1. High-end cosmetics (serums, lotions, creams)
2. Fragrances and perfumes
3. Hair care products (hair oils, hair masks)
Luxury packaging (limited editions, gift sets)
Small capacity plastic bottle
1. Sample Bottles
2. Reagent Bottles
3. Cosmetic Refill Bottles
4. E-liquid Bottles
Bottled mineral water
1. Bottled mineral water
2. Long strip plastic
Laboratory consumable bottles
1. Erlenmeyer Flask Style Bottles
2. Wide-Mouth Bottles
3. Amber Bottles
4. Sample Storage Bottles
What One-Step Injection Stretch Blowing Moulds We Offer
About Us
Professional Automatic One-step Injection Stretch Blow Moulding Machine & Mould Manufacturer
With over several tens of years of manufacturing experience in the blow molding machine industry, we have continuously improved and upgraded our blow molding machine production system and have applied for numerous national patents. We have developed specialized blow molding machines for various materials (PET/PETG/PC/PCTG/PP) used in packaging for cosmetics, water, oil, beverages, wide-mouth food containers, pharmaceutical packaging, and baby products.
We have consistently maintained a leading position in the industry, particularly in high-end blow molding machines for cosmetics, food, and pharmaceuticals.
Workshop Display
