How do medical equipment die castings and molds meet the dual requirements of structural rigidity and vibration damping for ultrasound equipment?
Publish Time: 2025-08-27
Among modern medical imaging devices, ultrasound diagnostic equipment (B-ultrasound) is widely used in clinical examinations due to its non-invasive, real-time, and portable features. However, achieving high-resolution and stable imaging requires not only advanced probes and image processing systems but also excellent mechanical structural performance throughout the entire device. Key components such as the device housing, bracket, probe holder, and internal frame are commonly manufactured using aluminum alloy die castings. Medical equipment die castings and molds must not only provide sufficient structural rigidity to ensure precise component positioning but also exhibit excellent shock and vibration damping to minimize the impact of external interference on imaging quality.1. High Rigidity Ensures Equipment Structural StabilityThe core imaging principle of ultrasound equipment relies on the probe transmitting and receiving high-frequency sound waves. Any slight structural deformation or displacement can cause image distortion or resolution loss. Therefore, the main structure of the device must possess extremely high rigidity and dimensional stability. Die-cast aluminum alloys offer excellent specific strength and elastic modulus. High-pressure casting processes enable the simultaneous formation of complex, integrated structures such as the device base, column, and rotating arm. This integrated design avoids the loose connections and accumulated errors associated with traditional sheet metal splicing or multi-component assembly, significantly improving the overall structural rigidity of the device and ensuring precise alignment of the internal circuit board, display, and probe interface during long-term use.2. Material and Structural Design Achieve Vibration DampingAlthough die-cast parts are inherently metal, appropriate structural design can effectively absorb and dissipate vibration energy. For example, reinforcing ribs, hollowed-out vibration-damping grooves, or biomimetic support structures at the connection between the bracket and the main unit can alter the vibration propagation path and reduce resonant frequency. Furthermore, die-cast parts can be combined with rubber pads, shock-absorbing rubber sleeves, or elastic connectors to create a "rigid-flexible" buffer system at critical stress points. When the device is subjected to external impact or transportation bumps, these structures effectively absorb vibration, preventing it from being transmitted to the sensitive probe and imaging module, ensuring clear and stable images.3. Precision Molding Ensures Assembly Accuracy and ConsistencyUltrasonic instruments require extremely high relative positional accuracy for each component, particularly the fit between the probe base and the main unit interface. The die-casting process, through high-precision molds and a stable production process, can achieve dimensional tolerances within ±0.1mm, ensuring high consistency across mass production for each die-cast part. This precision molding capability enables precise assembly of key components such as the probe slot, slide rails, and locking mechanism without extensive subsequent machining. This reduces structural stress and micro-vibration caused by assembly errors, further enhancing the stability and reliability of the entire device.4. Lightweight Design Reduces Inertial VibrationThe die-casting process supports complex thin-walled structures and topologically optimized designs, significantly reducing component weight while maintaining strength. Lightweight die-cast parts generate less inertial force during movement or handling, thereby reducing vibration amplitude caused by acceleration changes. For example, the handle, rotating arm, and base of portable B-ultrasound devices utilize lightweight die-cast structures. This not only makes them easier for medical staff to operate, but also reduces impact on internal components during movement, improving user safety and imaging stability.5. Surface Treatment Enhances Durability and BiocompatibilityMedical equipment is exposed to sterile and clean environments for extended periods of time, requiring the surface of die-cast parts to exhibit excellent corrosion resistance and easy cleanability. Surface treatments such as anodizing, spraying, or powder coating not only enhance die-cast parts' wear and chemical resistance but also provide antibacterial and anti-fingerprint properties. These treatments also provide a certain degree of damping, helping to absorb high-frequency vibrations and further optimizing vibration reduction.6. Integrated Design Enhances Overall System PerformanceModern die-casting technology allows for the integration of multiple functions into a single component, such as directly molding cable routing ducts, sensor mounting points, or heat dissipation channels onto a die-cast bracket. This highly integrated design reduces assembly steps and connection points, minimizing micro-vibration sources caused by looseness or fatigue, and enhancing the overall structural integrity and anti-interference capabilities of the device.Medical equipment die castings and molds successfully meet the dual requirements of high rigidity and vibration damping for ultrasonic equipment through high-quality material selection, precision mold design, integrated structural molding, optimized vibration-damping structures, and advanced surface treatment. They serve not only as the backbone of the device but also as a critical support for imaging accuracy and operational reliability. As medical equipment evolves toward higher precision and greater intelligence, die-casting technology will continue to play an irreplaceable role in structural innovation and performance improvement.
