INDUSTRY TOPIC
Automotive
Connectors, sensors, and structural components require dimensional stability and aesthetic quality. Gate placement and multi-cavity consistency are critical.
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View all articlesEjection Deformation: Distortion from Ejector Pins
Ejector pins cause depressions or protrusions, leading to part warping or bending that sets during cooling. This is known as ejection deformation.
Insufficient Weld Line Strength: Visible Seams Indicate Weakness
Weld lines may not be visually obvious, but parts consistently fail along these lines under stress, indicating insufficient weld line strength.
Brittle Fracture: Fracture Surfaces Reveal Failure History
Parts break during assembly or drop tests, showing flat fracture surfaces with little to no stretching. The material also snaps easily when bent by hand. This failure mode is known as brittle fracture.
Uneven Shrinkage: Inconsistent Contraction Within a Single Part
Within the same part, some areas shrink more than others, causing thickness variations, slight local depressions, and inconsistent overall dimensions. This condition is known as uneven shrinkage.
Warpage and Deformation: Caused by Uneven Shrinkage
Flat plates warp, long bars bend, and frames twist even when individual dimensions are within tolerance. This warpage results from uneven shrinkage.
Scorching and Charring: Compressed Gas Causes Material Carbonization
Dark brown or black patches with halos at part ends or weld lines that cannot be cleaned and appear consistently, caused by compressed gas heating the melt to carbonization temperatures.
LCP Automotive Connectors: Gate Defects and Processing Guide
As automotive electronics evolve, LCP is increasingly used in under-hood and high-density connectors. Its heat resistance, dimensional stability, flame retardancy, and flow properties make it well-suited for this application. However, issues like stringing, drooling, and gate clogging remain production challenges.
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