Introduction to One-Step Injection Stretch Blow Molding
A máquina de moldeo por soplado y estirado por inyección de una sola etapa (ISBM) utilizes a highly efficient plastic container forming process. It is widely used to produce high-precision, demanding hollow plastic products such as baby bottles, water cups, medicine bottles, crafts, and cosmetic bottles made from a variety of materials including PET, PETG, PP, PC, Tritan, PS, ABS, and PLA.
The core characteristic of this Máquina de moldeo por soplado ISBM is that the three steps—injection, stretching, and blow molding—are completed continuously within the same equipment. There are no intermediate handling steps, which drastically improves production efficiency and product stability.
Process Flow
- 1. Injection (Preform Creation)
- 2. Preform Tail Cutting / Heat Preservation
- 3. Stretch Blow Moulding
- 4. Bottle Take-out
Core Advantages
- Alta eficiencia y ahorro energético: Eliminates the need for secondary preform heating. By directly utilizing the injection preform’s residual temperature for blowing, it reduces energy consumption by approximately 40%.
- Excellent Performance: The stretching process perfectly aligns the material molecules, significantly improving the product’s compressive strength, barrier properties, and transparency.
- High Dimensional Precision & Stability: Fully automated process control minimizes human error, making it ideal for large-scale, high-quality production.
- Alto aprovechamiento de los materiales: Generates minimal waste, making the process environmentally friendly and cost-effective.
Equipment Benefits: Low energy consumption, low labor costs, small footprint, cost-effective product pricing, and exceptional production stability.
Technical Parameter Comparison: Ever Power vs. Japanese/European Machines
| Feature / Specification | Equipos ISBM de Ever Power | Japanese / European Brands |
|---|---|---|
| Investment Cost | Highly Cost-Effective, Fast ROI | Premium Pricing, Slower ROI |
| Eficiencia energética | Optimized system, ~40% energy saving | High efficiency, standard power usage |
| Maintenance Cost | Low maintenance, readily available parts | High cost, expensive proprietary parts |
| Customization Flexibility | High flexibility for customized bottle shapes | Standardized, rigid modification processes |
| Footprint | Compact layout design | Generally larger standard layout |
Composición del equipo y tecnologías clave
Nuestro Máquina de moldeo por soplado de un solo paso para formas de botellas personalizadas consists of five main systems: injection, heating, stretch blowing, molding, and control systems. Here are the crucial technological aspects of each:
1. Sistema de inyección
The injection system features a high-precision servo-driven unit equipped with a specially tailored barrel and a uniquely designed screw to ensure the even plasticization of polymer melts.
Highlighted Feature: Our patented injection screw design significantly improves melt homogeneity and production stability.
- High-precision temperature control system (accuracy within ±1℃).
- Servo-driven injection unit (rapid response, superior repeat accuracy).
- Preform wall thickness control system (optimizes thickness through axial or radial adjustments).
2. Sistema de calefacción
Utilizes heating bands or a combination of water and oil temperature control, monitored in real-time by advanced sensors. Key technologies include:
- Zoned heating control (precision temperature regulation for different sections of the preform).
- Non-contact temperature measurement (prevents surface damage to the preform).
- Adaptive heating power adjustment (automatically optimizes parameters based on operational speed).
3. Sistema de soplado de estiramiento
Composed of stretching rods, blow pins, and high-pressure air sources, it handles the axial stretching and radial blowing of the preform. Key technologies:
- Stretching mechanism (speeds up to 400mm/s with positioning accuracy of ±0.1mm).
- High-pressure gas utilizes independent pressure regulating valves (pressure fluctuations strictly controlled within ±0.05MPa).
- Synchronized stretch-blow control (guarantees flawless coordination during the forming phase).
4. Sistema de moldes
The mold system incorporates the preform mold, blow mold, and cooling channels. It typically employs a rotary multi-station structure (3 or 4 stations).
3-Station Mold Setup
(Includes Injection, Stretch Blow Molding, and Ejection stations. Highly efficient for standard containers.)
4-Station Mold Setup
(Includes an extra Temperature Conditioning station for precision cosmetic and specialty shapes.)
- High-precision mold machining (cavity surface roughness Ra≤0.8μm).
- High-efficiency cooling system (optimized waterway design shortens cooling time by 30%).
- Rapid mold change technology (mold swapping completed in ≤60 minutes).
Machine Wiring Precision:
Notice: We also supply custom-machined mold products to pair seamlessly with our equipment.
5. Sistema de control
An independent, highly advanced control system provides centralized management and parameter optimization across the entire production line.
- Multi-axis motion control (achieves exact synchronization of all stations).
- Adaptive process parameter optimization (real-time adjustments based on production data feedback).
- Remote monitoring and fault diagnosis systems (drastically improves overall operational reliability).
Material Applications & Product Types
Our equipment excels in processing various thermoplastic materials:
- Polyethylene Terephthalate (PET): Widely used for beverage bottles and food jars. Known for extreme transparency, strong barriers, and recyclability.
- Polypropylene (PP): Suitable for hot-fill containers (e.g., hot juices, tea drinks). Withstands high temperatures (>120℃) and offers excellent chemical resistance.
- Polyethylene Terephthalate Glycol (PETG): Ideal for cosmetic packaging like shampoo, mascara, and lip gloss bottles. It offers high viscosity, flawless clarity, deep colors, and resistance to chemical agents and stress whitening.
- Polycarbonate (PC): Mostly applied to baby bottles and sports water cups. Provides immense structural strength, high transparency, and exceptional heat resistance.
Using our Soluciones de máquinas de moldeo por soplado de un solo paso y alta eficiencia energética, factories can produce a vast array of products:
- Round or complex-shaped beverage bottles (Capacities ranging from 5ml to 20L).
- Pharmaceutical packaging (e.g., pill bottles, oral liquid containers).
- Food packaging containers (e.g., cooking oil jugs, condiment jars).
- Daily chemical and cosmetic containers (e.g., laundry detergent bottles, thick-walled perfume bottles).
The Importance of a Specialized Air Compressor
To guarantee the flawless operation of any single stage injection stretch blow molding machine, a high-quality air compressor is not an option—it is a critical necessity. During the stretching and blowing stages, immense, consistent high-pressure air is required to push the melted plastic firmly against the mold walls. If the air pressure drops or fluctuates, the resulting bottles will suffer from uneven wall thickness, haziness, or structural weakness.
Furthermore, industries like cosmetics, pharmaceuticals, and food require 100% oil-free and contaminant-free air to meet stringent hygiene standards. Our company provides perfectly matched Oil-Free Screw Air Compressors designed specifically for PET bottle blowing machines. These compressors ensure a steady, high-pressure, and clean air supply, significantly reducing defect rates and safeguarding the impeccable clarity of your perfume and medical bottles. Choosing our integrated compressor solution maximizes your machine’s lifespan and overall energy efficiency.
Genuine Customer Reviews
“We needed a highly reliable solution for our luxury cosmetic packaging line. Ever Power’s single stage injection stretch blow molding machine transformed our production. The PETG perfume bottles come out with glass-like clarity, zero scratches, and the scrap rate dropped below 1%. Excellent piece of engineering.”
— Procurement Manager, Cosmetics Manufacturer, France
“For our pharmaceutical pill bottles, precision is non-negotiable. This equipment delivered outstanding dimensional stability for our PP bottles. The compact footprint saved us valuable cleanroom space, and the automated system dramatically reduced our labor overhead.”
— Operations Director, Pharma Packaging Solutions, USA
“As a custom plastic container provider, we frequently change molds to meet varying client demands. The fast mold-changing technology on this machine is phenomenal. The energy efficiency is also a major plus, keeping our operating costs highly competitive in the local market.”
— Plant Supervisor, Custom Plastics Co., Japan
Frequently Asked Questions (FAQs)
1. What is the main difference between 1-step and 2-step blow molding machines?
In a 2-step process, preforms are molded first, cooled, stored, and then reheated later to be blown into bottles. A single stage injection stretch blow molding machine completes both preform injection and bottle blowing consecutively in one machine using the residual heat, saving massive amounts of energy and ensuring scratch-free, highly transparent products like high-end perfume bottles.
2. How long does it take to change molds for different customized bottle shapes?
Thanks to our rapid mold change technology, operators can typically switch out molds within 60 minutes. This greatly enhances production flexibility for facilities dealing with frequent product changeovers.
3. Can this machine handle thick-walled cosmetic containers effectively?
Yes. By utilizing the 4-station mold setup which includes an advanced temperature conditioning station, the machine precisely regulates the preform core temperature. This allows for flawless stretching of thick-walled materials like PETG, ensuring glass-like transparency without stress whitening.
4. Do you supply the necessary auxiliary equipment, like air compressors?
Absolutely. We provide comprehensive, turnkey production solutions. This includes perfectly matched high-pressure, oil-free screw air compressors tailored to meet the exacting demands of our blow molding lines, ensuring maximum hygiene and system stability.
5. What level of maintenance is required for continuous operation?
Our machines are engineered for durability and minimal downtime. They feature self-diagnosing control systems that alert operators to potential issues before they cause stoppages. Regular maintenance mostly involves standard lubrication and checking hydraulic/pneumatic seals, keeping overall maintenance costs impressively low.
