LSR Molding Solution for Automotive Wire Harness Seals

Application Case

Automotive wire harness seals are small components, but they play an important role in protecting electrical connections from moisture, dust, and other contaminants.

For this type of product, LSR injection molding is suitable for producing precision sealing components with consistent dimensions and repeatable quality.

Product Requirements

A typical wire harness seal needs to provide:

• Accurate inner and outer dimensions
• Stable sealing lips
• Consistent elasticity
• Reliable cable positioning
• Good environmental resistance
• Repeatable production quality

The seal must also match the actual cable diameter and connector cavity. The component cannot be designed independently from the complete connector assembly.

Recommended LSR Production Process

The production process can be organized as:

LSR Material → A/B Dosing → Mixing → Injection → Curing → Automatic Demolding → Inspection

For multi-cavity production, balanced material distribution becomes increasingly important because each cavity needs to receive a consistent amount of material.

Mold Design Considerations

The mold should be designed according to the sealing structure of the product.

Important points include:

• Gate position
• Venting
• Sealing lip geometry
• Cavity balance
• Parting line position
• Demolding method
• Flash control

For high-volume automotive applications, automated demolding can further reduce manual handling.

Published industry examples show that automotive wire harness seals can be produced with multi-cavity LSR molds and automated handling systems.

Production Goal

The objective is not simply to produce a silicone seal.

The complete solution should provide:

Stable molding + consistent dimensions + reliable sealing + efficient production

This makes LSR injection molding a practical option for automotive connectors, wire harnesses, sensors, and related electrical components.