Sinowon Automatic Vision Measuring Machine: Solving Precision Measurement Challenges of Black Injection Molded Parts, Empowering Industrial Quality Upgrade

In industrial automation and precision manufacturing, black injection molded parts are widely used in pneumatic/hydraulic system pipeline connectors, solenoid valve accessories, electronic connectors, medical devices, and automotive components. These workpieces have strict requirements on key indicators such as hole position accuracy, cylindricity, and base dimensions – any deviation can directly lead to air/water leakage, poor signal contact, and other quality issues, affecting equipment safety and operational stability.

However, due to their light-absorbing characteristics, black injection molded parts have long been a challenge in dimensional measurement. The Sinowon automatic vision measuring machine, equipped with a multi-light source cooperative imaging system and intelligent image processing algorithms, provides a reliable solution to this industry problem.

I. Why Are Black Injection Molded Parts Difficult to Measure?

The black plastic surface strongly absorbs light, making it difficult for ordinary optical instruments to obtain clear edge contours, resulting in distorted measurement data. Traditional contact measurement easily deforms thin-walled injection molded parts due to probe contact, and efficiency is low, making it hard to meet batch production requirements. Especially for tiny structures such as blind holes, deep grooves, and threads, conventional methods often fail to "see clearly and measure accurately".

II. Technical Features of Sinowon OMM: Significantly Improved Imaging of Black Parts

The Sinowon automatic OMM (Optical Measuring Machine) is designed for black material reflection characteristics. It is equipped with a ring LED cold light source and coaxial light system. By intelligently adjusting the intensity and angle combination of different light sources, it acquires high-contrast images without damaging the workpiece. Tests show that even for black workpieces with high light absorption, the system can clearly capture edge details at the 0.01mm level, effectively addressing the black imaging challenge.

Furthermore, this vision measuring machine integrates a high-resolution CCD camera, optical zoom lens, and a high-precision glass scale (0.1μm resolution). Combined with sub-pixel edge detection algorithms, it achieves micron-level accuracy under standard conditions, with repeatability up to ±1.5μm.

III. What Can It Measure? – Full Geometric Dimension Measurement for Black Injection Molded Parts

• Hole Position Accuracy: Precisely measure hole diameter, hole position tolerance, and center distance. For multi-hole injection molded parts, it supports array automatic inspection to ensure alignment accuracy when installing quick connectors.
• Cylindricity and Roundness: Through a full-circle automatic evaluation algorithm, it accurately determines cylindricity deviation of cylindrical holes, ensuring sealing fit between pneumatic connectors and tubing, reducing leakage risk.
• Thread Parameters (Major Diameter, Minor Diameter, Pitch): A dedicated algorithm automatically inspects thread accuracy without manual focusing, ensuring correct mating with standard ports.
• Flatness and Height: Optional line-scan laser probe enables non-contact 3D contour scanning of the workpiece, measuring base flatness and step height difference, outputting color deviation maps to visually identify deformation areas.
• External Contour Dimensions: One-click measurement of basic dimensions such as length, width, and angle, supporting direct comparison with CAD drawings for rapid verification against design requirements.

IV. What Problems Does It Solve? – Reducing Defect Risks Through Dimensional Control

1. Ensuring Sealing Reliability, Reducing Air/Water Leakage Risks

Pneumatic quick connectors and hydraulic valve fittings have high requirements for hole position accuracy and cylindricity – out-of-tolerance dimensions can cause seal mismatch and leakage. The Sinowon video measuring system performs micron-level inspection of hole diameter, roundness, and threads, ensuring each connector achieves good sealing after installation, significantly lowering leakage risks.

2. Preventing Poor Signal Contact

For electrical connecting components such as DIN standard terminal blocks for solenoid valve coils, the hole spacing, position tolerance, and pin coplanarity directly affect signal stability. This geometric dimension measurement solution precisely measures contact positions and alignment accuracy, effectively reducing poor contact or short circuits caused by dimensional deviations.

3. Improving Batch Inspection Efficiency, Meeting High-Frequency Full-Inspection Needs

In injection molding production lines, the instrument can quickly complete single-piece measurement, dramatically shortening inspection time compared to manual inspection, while reducing missed detection and false alarm risks – helping enterprises upgrade from sampling inspection to more comprehensive dimensional control.

4. Traceable Data Supporting Process Optimization

The equipment automatically generates SPC statistical analysis reports and illustrated inspection reports, supporting integration with MES systems to achieve full traceability of quality data, providing real and reliable data support for mold wear analysis and process parameter adjustments.

V. Multi-Industry Application Scenarios

The Sinowon automatic vision measuring machine serves a wide range of industries for precision dimensional measurement of black injection molded parts:

• Automation Equipment: Batch quality inspection of pneumatic quick connectors, solenoid valve accessories, cylinder connectors.
• Electronics: Suitable for inspection of tactile switch boots, sensor holders, PCB spacer posts, and other precision injection molded parts used in consumer electronics and home appliances.
• Medical Devices: Pipeline adapters for oxygen concentrators, nebulizers, and other equipment requiring quick fluid connection.
• Automotive Industry: Small pipeline connectors, sensor mounting bases for automotive air conditioning, fuel, or brake systems.

Whether for pneumatic system connectors or electronic connector bases, the Sinowon OMM vision measuring machine enables full-process quality control from first-article inspection to routine production monitoring, effectively safeguarding product quality and operational safety.

For more technical specifications or to schedule a sample test, please visit the official Sinowon website at www.sinowon.com or call our service hotline +86 769-23184144. Our professional team is ready to provide customized inspection solutions.