Efficient Cooling Design: Accelerating PET Cooling and Reducing Cycle Time

The core’s job is simple but difficult: it forms the inside of the bottle and it has to cool the pet fast. Because this core is 208.7mm long, getting water into the tip and back out efficiently is a major engineering challenge. We’ve optimized the internal flow to maximize heat transfer. The faster the PET cools, the faster you can open the mold. It is that simple. Our clients often see a measurable drop in cycle times after switching to BJY high-performance cores.

Mirror Polishing Process: Reducing Friction and Improving Ejection Speed

Friction is the enemy of speed. If your cores have even a slight surface roughness, the injection machine has to work harder to push the preforms off. This creates mechanical wear and slows down the machine. Our mirror-polishing process creates a surface so smooth that the preforms practically slide off. This means you can ramp up your ejection speed without risking damage to the preform neck or base.

Precision Manufacturing Standards: Ensuring Long-Term Core Performance

BJY has been focused on these efficiency gains since 2011. We don’t just look at the core as a piece of steel; we look at it as a thermal heat exchanger. Every 35*208.7mm core we produce is checked for surface integrity to ensure there are no microscopic pits that could trap pet.

Boosting Production Efficiency: Start with Your Mold Internals

If you are looking to break production records this year, start with your mold internals. Replacing worn or low-quality mold cores with BJY precision parts is a fast way to stabilize your production process and increase overall output. We provide the technical support needed to integrate these parts into your existing molds, ensuring a seamless transition and immediate results for your production metrics.