Injection Stretch Blow Molding Machine

The injection stretch blow molding machine, also known as the 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. The injection stretch blow molding machine integrates four processes, including the injection process, stretching process, blowing process, and molding process. The ISBM machine does not require a second-stage process or the assistance of other equipment.

Injection Stretch Blow Molding Machine Models

Our one-step Injection stretch blow molding is a highly efficient plastic container molding process widely used in the production of high-precision, high-demand hollow plastic products (e.g. baby bottle, water bottle, medicine bottle, craft and special-shaped bottle, cosmetic bottle made of PET, PETG, PP, PC, Tritan, PS, ABS or PLA etc.). Its core feature is that the three steps of injection, stretching and blow moulding are completed continuously in the same equipment without intermediate steps, which greatly improves production efficiency and product stability.

Y50-V3-EV Injection Stretch Blow Molding Machine

Y150-V4 Injection Stretch Blow Molding Machine

Y150-V4-EV Injection Stretch Blow Molding Machine

Y200-V4 Injection Stretch Blow Molding Machine

Y200-V4-B Injection Stretch Blow Molding Machine

Y250-V4 Injection Stretch Blow Molding Machine

Y250-V4-B Injection Stretch Blow Molding Machine

Y280-V6 Injection Stretch Blow Molding Machine

Y650-V4 Injection Stretch Blow Molding Machine

What is an Injection Stretch Blow Molding Machine?

An injection stretch blow molding 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. Compared with the traditional bottle manufacturing method, the 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, the injection stretch blow molding machine reduces pollution and material waste during the molding process. Due to the centralized and highly automated production process, the ISBM machine can ensure that the bottles achieve the desired effect in terms of transparency, strength, and dimensional consistency.

The 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, the ISBM Machine is particularly suitable for producing ISBM bottles, such as small and medium-sized plastic bottles with high transparency, good strength, and complex shapes. For example, PET water bottles, baby bottles, cosmetic bottles, etc.

One-step ISBM Machine Process Flow

The single stage 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.

1. 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.

2. Stretching Process
The injection-molded plastic is removed from the mold and undergoes 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 the blow process. During this process, it is necessary to control the cooling time and heating temperature to ensure the dimensional stability and surface quality of plastic products.

3. 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.

4. 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.

Advantages of One Step ISBM Machine

1. Energy Efficiency

The one-step injection stretch blow molding machine process retains residual heat from injection through to blowing, eliminating the need to reheat preforms entirely. This thermal continuity cuts overall energy demand by up to 40%, lowering utility bills and operational overhead considerably.

2. Superior Performance

Biaxial stretching during the blow phase aligns polymer chains in two directions simultaneously. The result is noticeably stronger compression resistance, tighter gas-barrier properties, and superior optical clarity, critical traits for pharmaceutical, cosmetic, and food-grade packaging applications.

3. High Dimensional Precision

Closed-loop automation governs every stage from injection through final blow, virtually removing operator-dependent variation. Neck finishes, wall thickness, and volumetric capacity hold tight tolerances batch after batch, making the process ideal for regulated industries.

4. High Material Utilization

Trimming and scrap rates drop sharply because preforms are purpose-molded to near-net shape before stretching. Less regrind means lower raw-material spend, reduced waste-stream volume, and a smaller environmental footprint per finished container produced.

5. Compact and Cost-Effective

Consolidating injection, stretching, and blowing into a single frame shrinks the factory footprint while cutting labor headcount. Fewer machines, fewer handling steps, and steady cycle times translate directly into lower per-unit production costs at scale.

6. Compatible with Japanese Models

Machine tooling and mold standards align with widely adopted, compatible with Japanese ASB and AOKI model configurations. Manufacturers switching from those platforms can transfer existing mold assets and operator expertise without expensive retooling or prolonged learning curves.

Application of Injection Stretch Blow Molding Machine

1. Food Bottle
Injection stretch blow molding machines are widely adopted in food-grade plastic bottle production, covering cooking oil, mineral water, condiment jars, and dry-food canisters. The process yields containers with highly uniform wall thickness and outstanding dimensional consistency, meeting strict FDA and food-contact safety regulations. PET bottles produced this way maintain excellent oxygen barrier performance, extending shelf life without the need for additional preservative packaging layers.

2. Beverage Bottle
The beverage industry depends heavily on ISBM technology to produce lightweight yet pressure-resistant bottles for carbonated soft drinks, juices, energy drinks, and bottled water. The biaxial orientation achieved during the stretch-blow stage significantly increases the tensile strength and CO₂ retention of the bottle wall, allowing manufacturers to reduce material consumption per unit while preserving structural integrity under filling line pressure and stacking loads in warehouse logistics.

3. Cosmetic Bottle
For personal care and cosmetic packaging, ISBM machines deliver the precise neck-finish tolerances and surface clarity that premium brands require. Bottles for serums, toners, lotions, and foundation can be molded in custom shapes with tight neck-thread specifications to accommodate pump dispensers and flip-top closures. The single-stage ISBM process is especially favored here because the preform never leaves the machine, reducing contamination risk and maintaining optical transparency in PETG and PET materials.

4. Condiment Bottle
Ketchup, soy sauce, vinegar, chili oil, and salad dressing each impose different chemical and mechanical demands on their containers. ISBM-produced condiment bottles resist the acidic and saline content of these products without flavor migration, a critical consideration for long-term shelf storage. The process also supports the production of squeezable bottle variants with controlled wall flexibility, giving end users precise portion control while preserving the bottle’s ability to return to its original shape after each squeeze.

5. Shampoo Bottle
Personal hair care products require packaging that balances ergonomic grip, visual shelf appeal, and chemical compatibility with surfactant-heavy formulations. Injection stretch blow molding supports high-output production of shampoo bottles in HDPE and PET, with wall thickness distributions that eliminate weak points around shoulder curves and handle recesses. The process also accommodates in-mold labeling preparations and post-mold sleeving, giving brand owners full decoration flexibility without secondary operations that slow down the production line.

Beverage Bottle

Food Bottle

Cosmetic Bottle

Hand Wash Bottle

Condiment Bottle

Shampoo Bottle

6. Chemical Bottle
Industrial-grade ISBM equipment produces chemical storage containers with uniform wall thickness and high-density molecular alignment. The biaxial stretching process imparts superior chemical resistance, making these bottles suitable for storing acids, alkalis, and solvent-based formulations under demanding warehouse and transport conditions.

7. Pharmaceutical Bottle
Pharmaceutical packaging demands zero contamination and dimensional consistency batch after batch. ISBM machines deliver sterile-grade PET bottles with tight neck-finish tolerances, meeting GMP standards for tablet, capsule, and liquid medicine containment where tamper-evident closures and moisture barrier performance are non-negotiable.

8. Pesticide Bottle
Agrochemical formulations attack standard plastics over time, causing seepage or structural failure. ISBM-formed pesticide containers undergo biaxial orientation that dramatically tightens the polymer matrix, producing bottles with excellent resistance to organic compounds, UV degradation, and repeated handling across field distribution networks.

9. Infusion Bottle
Large-volume parenteral infusion bottles require flawless clarity and absolute freedom from particulate matter. ISBM technology molds PP or PET containers in a fully enclosed cycle that eliminates secondary contamination risks, producing lightweight, breakage-resistant alternatives to glass for hospital and clinical fluid delivery applications.

10. Medicinal Spray Bottle
Nasal sprays, throat irrigators, and topical medicinal spray products rely on precise bottle geometry to ensure consistent pump actuation and dosing accuracy. ISBM tooling achieves the tight body-shoulder transitions and controlled internal volume tolerances that spray mechanism manufacturers specify for reliable patient-side performance.

11. Eye Drop Bottle
Ophthalmic packaging sets the toughest dimensional standards in the entire pharmaceutical container sector. ISBM produces small-volume, low-density polyethylene or PET eye drop bottles with smooth internal surfaces and consistent orifice geometry, enabling accurate single-drop dispensing while maintaining sterility throughout the product shelf life.

Injection Stretch Blow Molding Machine