LSR Overmolding Technology Delivers Waterproof Protection for Type-C Connectors

A leading electronics manufacturer sought to achieve IP68 waterproof certification for their Type‑C connectors, but conventional pre‑formed silicone gaskets could not deliver the required sealing integrity due to inherent assembly gaps and tolerance variations. To address this, we deployed our high‑precision liquid silicone rubber injection molding system, specifically engineered for micro‑sized sealing applications.

The heart of the solution is our closed‑loop servo‑controlled injection unit, which ensures unparalleled shot‑to‑shot consistency and precise material flow. Our advanced cold‑runner mold design not only maintains stable curing conditions but also minimizes silicone waste, directly lowering material costs. By overmolding LSR directly onto the metal insert, the process creates a seamless, chemically bonded seal that eliminates all leak paths, reliably meeting the IP68 requirement for continuous submersion. Beyond waterproof performance, the fully automated dosing and feeding system reduces manual intervention, stabilizes long‑run production, and significantly cuts defect rates.

The result is a robust, high‑output manufacturing solution that combines micron‑level accuracy with operational efficiency, enabling customers to scale up production without sacrificing quality or consistency. It shows how our LSR technology turns demanding specifications into reliable, repeatable outcomes.