Plastic Water Bottle Manufacturing Process Explained (Part 1)

There's a story in every cup, warmth in every life. Hello everyone, "Dong Dong's Cup Talk" is here! Today I'll be sharing how plastic water bottles are manufactured and what key points need attention during production. Some of you might be wondering: "Wait, don't you mainly produce stainless steel cups? How do you know about plastic bottle production?" http://www.zhanyict.com/en/ProductsDetail-VB-10504.htmlWell, our factory actually manufactures both stainless steel and plastic water bottles - in fact, we've been making plastic bottles longer than stainless steel ones!

Our facility is equipped for both injection molding and blow molding processes, including both one-step and two-step blow molding machines, as well as injection stretch blow molding capabilities. http://www.zhanyict.com/en/ProductsDetail-VB-10504.htmlSo if you need plastic mold development, product injection molding, bottle processing, or plastic product development, feel free to contact me! (This isn't an ad, really! Haha)

If you enjoy this content, please give it a thumbs up. Follow me to be the first to see my posts, and if you have business needs, feel free to DM me - I'm happy to help. http://www.zhanyict.com/en/ProductsDetail-VB-10504.htmlSince there's a lot to cover, I'll be sharing this in multiple parts as usual.

I. Comprehensive Analysis of Plastic Water Bottle Production Process

1. Product Design and Material Selection

Taking a tapered beverage bottle as example:

- Its streamlined design requires precise wall thickness gradient calculation (typically 1.2-2.5mm)

- Preferred materials: TRITAN (copolyester) or AS (acrylonitrile-styrene copolymer)

- TRITAN excels in impact resistance (withstands drop tests from 3m height) and transparency (light transmittance over 92%), http://www.zhanyict.com/en/ProductsDetail-VB-10504.htmlbut requires strict melt temperature control (265-285°C) to prevent degradation

2. Key Parameters in Mold Development

For custom-shaped cartoon bottles, special attention should be paid to:

- Draft angle ≥3° (to prevent sticking)

- Vent groove depth 0.02-0.04mm (to avoid trapped air burns)

- Cooling channel spacing should be 3 times wall thickness http://www.zhanyict.com/en/ProductsDetail-VB-10504.html(to ensure even cooling)

3. Injection/Blow Molding Process Control

Common issues and solutions for large sports bottles using injection blow molding:

- Uneven wall thickness: http://www.zhanyict.com/en/ProductsDetail-VB-10504.htmlAdjust core pin temperature gradient (±2°C)

- Stress whitening: Reduce holding pressure from 80MPa to 65MPa

- Visible parting lines: Polish mold to Ra0.1μm or below