INDUSTRY TOPIC
Consumer electronics
Appearance and precision are equally critical; gate marks, weld lines, and color-change residue must be controlled together.
7 articles
Articles in this topic
View all articlesMold Sticking and Scuffing: Surface Damage During Demolding
Parallel stripes appear on the side walls along the demolding direction; severe cases involve surface layer removal and material residue on the mold. This defect is classified as sticking and scuffing.
Assembly Interference: Fit Issues May Not Be Caused by Dimensional Errors
Snap fits fail to engage, holes misalign, or mating surfaces are too tight despite individual part measurements falling within tolerance. This issue is classified as assembly interference.
Ejector Whitening: White marks at ejector pin locations, not gates.
Small white spots or marks with distinct edges appear at ejector pin locations on the part. This phenomenon, known as ejector whitening, is more prominent in thinner sections.
Uneven Gloss: Why One Area Shows Both Shiny and Matte Spots
Distinct shiny and matte zones on the same part with clear boundaries; polishing the mold cannot resolve this.
Yellowing and Discoloration: Overall vs. Gate Area
Parts may exhibit overall yellowing, localized yellowing near the gate, or end-of-fill yellowing. The location indicates the root cause.
Sink Marks and Indentations: Can Holding Pressure Fill Thick Sections?
Sink marks on flat surfaces—typically at thick walls, rib roots, or bosses—cannot be concealed by polishing, as they originate from internal shrinkage.
LCP Micro Connectors for Consumer Electronics: Precision Molding Requirements
Micro-connectors in phones, earbuds, watches, and tablets are becoming increasingly compact in pitch and wall thickness. While LCP is widely used for its excellent flow and dielectric properties, smaller parts suffer more from gate stringing, drooling, and clogging, which reduce yield.
Can't find the matching defect? Share photos of the resin, shot weight, and gate for a review against the actual structure.
Online selection and quote