IntroductionWe have previously shared solutions for uneven wall thickness, haze/whitening, bottom shrinkage, surface scratches and gate stringing of PET preforms. This article focuses on bubbles an...

1. IntroductionBottom shrinkage is a common molding defect in PET preform injection molding. It is typically characterized by a localized depression at the bottom of the preform.In severe cases, it...

IntroductionFollowing our continuous technical insights into "Uneven Wall Thickness" and "Whitening/Hazing" over the past two weeks, Huazhi Mechanical this week focuses on conquering two more persi...

IntroductionIn last week's post, we explored the causes and solutions for uneven wall thickness in PET preforms. This week, we will shift our focus to another common and headache-inducing defect in...