Technical Insights | Causes and Systematic Improvement Solutions for the Ring-Shaped Halo (Gate Smear / Haze Ring) Around the Injection Gate
During precision injection molding mass production, many appearance parts show a typical defect: a ring-shaped dull halo forms around the gate, commonly called gate smear or gate halo in the industry. This color-difference defect directly affects the appearance grade of products and, in severe cases, directly causes batch defects, raw material loss and delivery delays. It is widely seen in the production of home appliance housings, 3C accessories, daily necessities and automotive appearance plastic parts. I. Defect phenomenon: a highly recognizable ring-shaped dull halo forms around the gate opening, with dark and uneven color...
Analysis of the Causes of Product Shrinkage in Injection Molding and Solution Interpretation
Ningbo Konger Machinery has long been deeply engaged in the R&D of high-end injection molding equipment and the optimization of precision injection molding processes. Relying on a large number of on-site commissioning cases and equipment technical accumulation, it has completed multi-dimensional root-cause analysis of injection shrinkage defects, forming standardized solutions covering process, equipment, mold and raw materials, helping injection molding enterprises precisely solve shrinkage defects and stabilize mass production quality, reasonably extend cooling time, ensure products are fully cured and set before demolding, and avoid secondary shrinkage indentations in the later stage.