Case Study: Seal Bead Inspection for Automotive Assembly
The Challenge: Ensuring a Reliable Seal in Demanding Conditions
In automotive manufacturing, sealing integrity is critical, especially for components like battery enclosures and engine housings where leaks can lead to costly failures, safety risks, and warranty issues.
One manufacturer was facing a persistent challenge: inconsistent sealant bead application. While material was being dispensed, there was no reliable way to confirm whether the bead would actually perform as intended.
Traditional inspection methods fell short. Vision systems struggled with glossy, wet, and semi-transparent sealants, making it difficult to accurately detect bead presence and quality. The result? Increased risk of undetected defects and downstream failures.
The Solution: Precision Measurement with OPTEX FA CD2H
Ramco implemented the OPTEX FA CD2H laser displacement sensor to bring real-time, high-precision inspection directly into the production line.
Instead of simply detecting whether material was present, the system measures the actual height of the seal bead relative to the part surface, a far more meaningful indicator of sealing performance.
Key Features of the Solution with OPTEX CD2H
- Non-contact measurement of soft, wet sealant without disturbing the material
- High-precision detection of bead height variation
- Reliable performance on glossy, reflective, and semi-transparent surfaces
- High-speed sampling for real-time, inline inspection
- IO-Link communication for seamless PLC integration and feedback
- Built-in display for easy setup, monitoring, and diagnostics
How It Works
As parts move through the production line, the sensor scans along the seal bead path and continuously measures the height difference between the base surface and the applied material.
This allows the system to instantly identify:
- Missing bead ? gaps in application
- Low bead height ? insufficient sealing material
- Excess material ? over-application
The Result: Smarter Inspection, Stronger Seals
With the new inline inspection system, the manufacturer achieved:
- Improved seal consistency and reduced leak risk
- Real-time detection of dispensing issues
- Reduced scrap and rework
- Greater confidence in final product quality
Why It Matters
Seal bead inspection isn’t just about detecting whether material is present; it’s about ensuring the seal will actually perform in the field.
By measuring bead height directly, manufacturers can catch defects at the source, avoid costly downstream failures, and deliver more reliable products to their customers.
Ready to Improve Your Inspection Process?
Let Ramco help you move beyond basic detection and into true process validation.