Application
During the production of motor components using the injection molding process, the occurrence of blowhole inclusions in hidden channels is a common challenge. These can lead to channel narrowing or even complete blockage, compromising the smooth flow of the intended medium.

Challenge
Previously, the only option for inspection was through time-consuming endoscopic methods, which were not suitable for automation due to the need for short cycle times.
The task was to develop a testing method that enables efficient inspection for cavities within the shortest possible cycle times.

Solution
The Vögtlin electronic pressure controller equipped with a pressure transmitter offers a comprehensive approach. This advanced solution allows for the determination of channel narrowing or blockage by utilizing a predefined test pressure and precisely measuring the flow. This enables quick differentiation between compliant and reject parts within very short cycle times.
The customer initiates a leakage test for the entire system. A master part, determined through endoscopic examination, serves as the benchmark for subsequent inspections. The flow rate is then measured at a test pressure of for ex. 30 mbar g. This value serves as a reference for evaluating other parts of the series.
Depending on the size of potential blockages, a noticeable decrease in flow rate may occur while maintaining a consistent test pressure. This cost-effective and efficient method ensures reliable inspection of hard-to-reach hollow spaces and channels.

Key Features
• Pressure controller with flow measurement/limitation
• Flow controller with pressure measurement
• High repeatability and reliability paired with long-term stability
• Secure and fast regulation
• Compact unit with high-quality components
• MEMS sensor technology
• Available interfaces: Analog, Modbus RTU, Profibus DP-V0/DP-V1, Profinet, EtherCAT, EtherNet/IP

For more information about Vögtlin›s innovative solution for quality assurance in engine manufacturing, please visit
parts-inspection.

Please contact us for further information or documentation. You will find our contact details at www.voegtlin.com/en/

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