600ml PET Blow mold

What Makes This Mold Practical

Balanced forming instead of over-design
Rather than chasing complex structures, this mold focuses on achieving stable and repeatable forming results. The goal is to keep production running smoothly, not just to meet theoretical parameters.

Better support for process tuning
In blow molding, the mold and process must work together. This design leaves enough flexibility for adjusting parameters like stretch timing and air pressure without causing instability.

Adapted for aseptic production environments
Aseptic filling requires bottles with consistent geometry and reliable strength. This mold is designed with that requirement in mind, especially in terms of bottle stability after forming.

Material choice that fits real production
A6061 aluminum is not just easy to machine — it also responds well in high-cycle production, making it a practical option for daily operation.

Custom adjustments available
Details such as cavity layout, cooling channels, and bottle shape can be fine-tuned based on actual machine conditions and project needs.

How the Blowing Process Affects the Bottle

In PET stretch blow molding, three actions happen almost at the same time: stretching, pre-blowing, and final blowing. Even though each step is very short, their coordination has a direct impact on the final bottle.

The early stage — stretching and pre-blowing — plays a key role. It determines how the material spreads from the preform into the bottle body and base. If this stage is not controlled well, the result is usually uneven wall thickness or weak areas.

To get stable results, parameters such as:

• when stretching begins
• how fast the stretch rod moves
• when pre-blowing starts and stops
• pre-blow air pressure and flow

need to be adjusted carefully. In some cases, controlling the temperature distribution of the preform also helps improve consistency, especially the difference between inner and outer wall temperatures.

During fast blowing and cooling, internal stress is formed inside the bottle wall. This is not always a problem. For carbonated bottles, it can improve pressure resistance. But for hot-fill applications, stress needs to be released properly to avoid deformation later.

Application Scenarios

This mold is suitable for producing:

• Aseptic beverage bottles
• Drinking water bottles
• Tea and juice bottles
• Functional drink packaging
• Other 600ml PET containers

Different products place different demands on the bottle. For example, carbonated drinks require pressure resistance, while still beverages focus more on shape stability. The mold design needs to match the actual use, not just the drawing.

Why Work with BJY

Foshan Baijinyi Precise Technology Co., Ltd. (BJY) has been focusing on PET mold manufacturing since 2011. Instead of covering too many product categories, we stay concentrated on what we know best.

Experience that comes from production
We have worked on different bottle types and understand the common issues that appear during blowing, not just in theory but on the machine.

Straightforward manufacturing approach
We aim to make molds that run well, rather than over-complicating the design.

Closer to real production needs
Each project is considered from the perspective of actual use: machine compatibility, cycle time, and product quality.

Flexible cooperation
Whether you have samples, drawings, or just an idea, we can support the development step by step.