What is Injection Stretch Blow Molding Machine?

Catalogue:

Injection Blow Molding Machine

Injection Blow Moulding Machine

Injection Stretch Blow Molding Machine, also known as injection stretch blow moulding machine or ISBM MACHINE, is a kind of plastic bottle production equipment. By injecting plastic raw materials into molds, heating, pressurizing and blowing air, it processes plastic into products of the required shape and size. It is usually used to produce various plastic bottles, containers, cans and other products. Injection Stretch Blow Molding Machine integrates four processes, including injection process, stretching process, blowing process and molding process. ISBM machine does not require a second-stage process or the assistance of other equipment. Compared with the traditional bottle manufacturing method, ISBM machine, with its significant advantage of “one machine for the entire process”, has greatly improved production efficiency, saved labor and factory space. At the same time, Injection Stretch Blow Molding Machine reduces pollution and material waste during the molding process. Due to the centralized and highly automated production process, ISBM machine can ensure that the bottles achieve the desired effect in terms of transparency, strength and dimensional consistency.

Injection Stretch Blow Molding Machine is a one-step fully automatic molding equipment, featuring single-row multi-cavity and double-row multi-cavity series. It is suitable for thermoplastic plastics such as PET, PC, and PP and is widely used in the manufacturing of packaging bottles for the pharmaceutical, health care products and cosmetics industries. Also, Injection Stretch Blow Molding Machine is particularly suitable for producing ISBM bottles like small and medium-sized plastic bottles with high transparency, good strength, and complex shapes. For example, PET water bottles, baby bottles, cosmetic bottles, etc. The emergence and popularization of ISBM machine mark an important upgrade of plastic molding technology. ISBM molding not only enhances the precision and consistency of the bottle making process, but also drives the packaging industry towards a more efficient, clean and intelligent direction.

Working Process of Injection Stretch Blow Molding Machine

1. Injection Process

2. Strectching Process

3. Blowing Process

4. Molding Process

Injection Stretch Blow Molding Machine is divided into four main processes: injection process, stretch process, blow process and molding process. The entire process is continuously completed within one machine, featuring high automation, high precision and good consistency of bottle shapes.

Injection Process
The injection process is the initial stage of the entire process. Molten plastic (such as PET particle) is injected into the preform mold and melt into a flowing plastic melt under high temperature and pressure. At this process, it is necessary to control parameters such as injection speed, injection pressure and mold temperature to ensure that the melting plastic has good fluidity and filling ability so that it can uniformly and completely fill the mold cavity, obtaining the required shape and size.
Stretching Process
The injection-molded plastic is removed from the mold and undergo initial cooling and shaping. After that, the preform is sent into the heating zone and reheated to a temperature which is suitable for stretching. After the heating is completed, the stretching rod elongates the preform longitudinally, preparing for blow process. At this process, it is necessary to control the cooling time and heating temperature to ensure the dimensional stability and surface quality of plastic products.
Blowing Process
After stretching, the plastic product is placed in the blowing mold and compressed air is used to expand the plastic product. Therefore, the softened preform adheres to the inner wall of the mold and forms the predetermined bottle shape outline. It is crucial to the final shape and structure of plastic bottles. At this process, it is necessary to control parameters such as blow molding pressure and mold temperature to ensure that the shape and size of the obtained plastic products meet the requirements.
Molding Process
After blowing, the bottle needs to be cooled and formed in the mold. Through the cooling medium in the cooling channel of mold, the heat of the bottle body is quickly removed, allowing the plastic material to solidify and maintain its accurate shape, achieving the required surface finish and dimensional accuracy. At this process, it is necessary to control the uniformity, speed and duration of cooling. Also, the temperature of the mold should be controlled to improve the quality of the bottle and production efficiency.

Advantage of Injection Stretch Blow Molding Machine

Shorten Production Cycle: Complete the entire production process from injection to molding in one machine, significantly enhancing production efficiency.
Improve Production Efficiency: Quickly and precisely manufacture large quantities of plastic products, with production efficiency far exceeding that of manual production and other traditional molding processes.
Improve Molding Precision: Precisely control the temperature, pressure and speed of the mold, achieving a high degree of consistency in product size, shape and density.
Reduce Labor Cost: Reduce unstable factors caused by human factors and lower human resources with fully automated operation.
Ensure Energy Conservation: Only use plastic particles and recycle them, reducing waste and environmental impact.
Need Small Working Space: Suitable for small factory or clean workshop with limited space.

Features of Injection Stretch Blow Molding Machine

One-Step Processing
Automatic Control System
Servo-Driven System
Vertical Working Mode
Compact Machine Structure
One Mold with Multiple Cavities
Various Product Molding Types
Extensive Raw Materials

Injection Stretch Blow Molding Machine vs. Extrusion Blow Molding Machine

Feature	ISBM Machine	Extrusion Blow Molding Machine
Product
Working Process	Injection, stretching, blowing, molding	Extrusion, cooling, blow, molding
Product Performance	Excellent clarity and superior gas barrier	Poor clarity and less gas barrier
Product Stability	Higher stability and dimensional precision	Lower stability and dimensional precision
Material Utilization	Higher material efficiency, less waste	Lower material efficiency, more waste
Application	High-performance bottles	General Plastic Bottles

What Types of Raw Material Can Be Used in Injection Stretch Blow Molding Machine?

PET

PCT

PETG

How to Use Injection Stretch Blow Molding Machine for Bottle Manufacturing?

Machine Preparation

Prepare Raw material: Select appropriate plastic and check the drying status to avoid moisture. Preheat the Machine: Set appropriate mold and preheat to the required process temperature.

Parameter Setting

Set Parameters: Select appropriate injection pressure, speed, stretching rod, blowing pressure. Choose Cooling Duration: Adjust the cooling cycle reasonably to ensure the bottle forming.

Manufacturing Operation

Injection: Inject molten plastic to form the preform. Stretching: Heat the preform to optimal temperature and stretch with the stretch rod. Blowing: Use high-pressure air to blow the preform into the final bottle shape. Molding: Cool and solidify the plastic bottle to achieve accurate shape.

Quality Inspection

Check the Product: Check the bottle body size, wall thickness to ensure they meet the standards. Optimize Quality: Adjust manufacturing parameters and optimize product quality.

How to Maintain Injection Stretch Blow Molding Machine?

Regular Cleaning: Clean the injection and blowing molds to keep the mechanical parts free of dust and oil.
Lubrication Maintenance: Apply lubricating oil to components such as guide rails to prevent wear.
All Electric System Checking: Check the stability of the electric system to ensure their normal operation.
Electrical System Maintenance: Inspect the interior of the electrical system to prevent short circuits.
Mold Maintenance: Inspect the wear of the molds and replace them immediately.
Machine Adjustment: Adjust the machine parameters and various components to ensure product accuracy.

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