Comprehensive Guide to Plastic Water Bottle Production Process (Part 4)

There’s a story in every cup, warmth in every life. Hello everyone, "Dong Dong's Cup Talk" is here! Today, we’ll continue exploring how plastic water bottles are made and the key considerations during production. Some might wonder: http://www.umbottle.com/ProductsDetail-VB-10475.html"Wait, don’t you mainly produce stainless steel bottles? How do you know so much about plastic bottle manufacturing?" Well, our factory actually has a longer history in plastic bottle production than in stainless steel—we’ve mastered both!

Our facility supports injection molding and blow molding, including single-stage and two-stage blow molding, as well as injection-stretch-blow molding. http://www.umbottle.com/ProductsDetail-VB-10475.htmlWhether you need plastic mold development, product injection molding, bottle processing, or custom plastic product solutions, we’ve got you covered! (And no, this isn’t an ad—seriously, not an ad—haha!)

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4. Solutions to Four Common Production Challenges

1. Tapered Beverage Bottles

- Issue: Base shrinkage (>5% volumetric shrinkage)

- Solution: Dynamic pressure-holding tech: 85MPa/3s (initial) → 45MPa/5s (final)

2. Irregular-Shaped Cartoon Bottles

- Issue: Weak weld lines http://www.umbottle.com/ProductsDetail-VB-10475.html(<60% of base material strength)

- Solution: Raise mold temp to 110°C (vs. standard 80°C) + 30% faster melt front speed

3. Wide-Body Sports Bottles

- Issue: Stress cracking (fractures after 24h with cold water)

- Solution: Annealing http://www.umbottle.com/ProductsDetail-VB-10475.html(100°C/2h) to relieve internal stresses

4. Straight-Travel Bottles

- Issue: Thread deformation (>0.3mm fitting gap)

- Solution: In-mold cutting tech + ejector delay extended by 0.5s