One-Step Injection Stretch Blow Molding Machine(3-Station)

Product Overview

The One-Step Injection Stretch Blow Moulding (ISBM) process is a high-efficiency manufacturing method where injection molding, conditioning, and stretch blow molding are completed in a single integrated machine. Unlike two-step systems, there is no need to reheat preforms from room temperature, which significantly preserves energy and ensures flawless bottle quality.

Our single stage injection stretch blow molding machine series is engineered for producing high-demand hollow plastic products made from PET, PETG, PP, PC, Tritan, PS, ABS, and PLA. It is the premier choice for manufacturing cosmetic bottles, pharmaceutical packaging, baby bottles, and high-end water cups requiring zero surface defects and precise dimensional stability.

The 4-Station Process

• 1. Injection: Molding the preform.
• 2. Conditioning: Temperature adjustment/Preform Tail Cutting.
• 3. Stretch Blow: Biaxial orientation and shaping.
• 4. Ejection: Automatic bottle take-out.

1. Injection SystemFeatures a high-precision servo-driven unit with dedicated screws for uniform plasticizing.

Key Tech: Temperature control accuracy of ±1℃; Fast-response servo drive; Axial/radial wall thickness control.

2. Temperature Conditioning System

Uses advanced heating blocks or fluid regulation to perfect the preform profile.

Key Tech: Zonal heating control; Non-contact temperature sensing; Adaptive power adjustment based on cycle speed.

3. Stretch Blow Molding System

Combines servo stretching with high-pressure air for perfect bottle definition.

Key Tech: Stretch speeds up to 400mm/s; Pressure fluctuation control within ±0.05MPa; Synchronized stretch-blow logic.

4. Mold System

Rotary multi-station structure (3 or 4 stations) with premium steel construction.

Key Tech: Cavity surface roughness Ra≤0.8μm; Optimized cooling channels reducing cycle time by 30%; Quick-change design (≤60 mins).

5. Intelligent Control System

Centralized management of all axes and parameters.

Key Tech: Multi-axis motion synchronization; Data-driven process auto-tuning; Remote diagnostics.

The Power Behind the Process: Oil-Free Air Compressors

A high-performance one step bottle blowing equipment setup is incomplete without a reliable air source. The "Stretch Blow" phase requires high-pressure air (typically 3.0 MPa to 3.5 MPa) to instantly expand the preform into the mold cavity.

Ever-Power provides specialized Oil-Free Screw Air Compressors designed specifically for the ISBM process. Using an oil-free compressor is non-negotiable for applications in food, pharmaceutical, and cosmetic packaging, as it ensures the compressed air coming into contact with the bottle interior is 100% free of contaminants. This protects your product purity and meets strict hygiene standards.

1. What is the difference between one-step and two-step blow molding?

In a two-step process, preforms are made on one machine, cooled, stored, and then reheated and blown on a second machine. An integrated blow molding machine (one-step) combines all these processes in one unit. This eliminates reheating (saving energy), reduces scratches on preforms, and produces bottles with superior aesthetic quality and clarity.

2. Can this machine produce bottles with complex shapes?

Yes. The one-step process allows for precise control over the preform's temperature profile immediately before blowing. This makes it the best one step blow molding machine for baby bottles and cosmetic containers with ovals, flat shapes, or complex geometries that are difficult for two-step machines.

3. What maintenance does the ISBM machine require?

Routine maintenance involves checking hydraulic fluid levels, lubricating moving parts (toggle systems), and inspecting air compressor filters. Our machines are designed with self-diagnostic systems to alert operators of any issues. We also offer one step blow molding machine with low maintenance cost designs featuring servo motors that reduce wear compared to full hydraulic systems.

4. Does Ever-Power provide molds for the machine?

Yes, we are a comprehensive one step blow molding machine supplier. We design and manufacture high-precision injection and blow molds tailored to your bottle design. We can also assist with bottle design optimization to ensure the best strength-to-weight ratio.

5. Why is an oil-free air compressor necessary?

During the blowing phase, high-pressure air comes into direct contact with the inside of the bottle. If the compressor leaks oil, micro-droplets can contaminate the container. For food, baby products, and medical packaging, using an oil-free compressor ensures the final product remains safe, odorless, and compliant with health regulations.