tep into our state-of-the-art injection molding facility, where raw materials transform into high-performance waterproof connectors (IP67/IP68/IP69K rated). Every day, our automated lines produce thousands of precision M8, M12, and custom connectors for automotive, industrial, and marine applications. Here’s how we ensure perfect seals, consistent quality, and 100% reliability.

1. Raw Material Selection: 

• PBT (Polybutylene Terephthalate) – For high-temperature resistance

• PA66 (Nylon 66) – For chemical/oil resistance in automotive use

• Sealing elements:

• TPE (Thermoplastic Elastomer) gaskets – Compress evenly for watertight seals

• Silicone overmolding – For extreme flexibility in cable exits

2. The Injection Molding Process: Precision in Action

Step 1: Mold Preparation

• Hardened steel molds (50+ cavities) are preheated to ±1°C accuracy.

• Surface treatments prevent sticking (e.g., DLC coating for 500K+ cycles).

Step 2: Injection & Packing

• Granules are melted at 240-300°C (material-specific).

• High-pressure injection 

Step 3: Cooling & Ejection

• Rapid cooling with conformal channels minimizes warpage.

• Robots extract parts for 24/7 unmanned production.

• 3. Overmolding: Creating Unbreakable Seals

• For cable connectors:

• Primary molding: Metal contacts are inserted into plastic housings.

• Secondary overmolding: TPE/Silicone is injected to form strain reliefs and IP-rated seals.