Heat Pipe Filling & Welding Machine
The Precision Heat Pipe Filling & Welding Machine is the technological heart of the heat pipe production line. It performs the “Double-Vacuum” process: first, evacuating the air from the sintered/grooved pipe, and second, injecting a microscopic, high-purity volume of working fluid before the final hermetic seal. This machine is designed to eliminate Non-Condensable Gases (NCG), which are the primary cause of long-term performance degradation and “cold-end” failure in thermal modules.
Advanced Features & Subsystems
- Vacuum & Degassing Excellence:
- Turbo-Molecular Pump Option: For high-end aerospace or server heat pipes, the system can achieve ultra-high vacuum (10−5 Pa range).
- Automatic Degassing Cycle: Programmed “boil-off” cycles to ensure the working fluid itself is free of dissolved gases before injection.
- Micro-Dosing & Fluid Management:
- High-Accuracy Metering Pump: Utilizes a servo-driven ceramic piston pump or a high-precision syringe pump for fluid delivery, ensuring zero-drip and zero-error injection.
- Fluid Compatibility: Fully compatible with Deionized Water, Methanol, Acetone, and Ethanol.
- Hermetic Sealing Technologies:
- Dual-Option Welding: Supports TIG (Tungsten Inert Gas) welding for robust industrial pipes or Ultrasonic Cold Welding for ultra-thin (0.4mm – 1.0mm) Vapor Chambers.
- Leak Testing Integration: Optional Helium Mass Spectrometry port for immediate post-seal leak detection.
Technical Parameters
| Technical Parameter | Specification Detail |
|---|---|
| Ultimate Vacuum | ≤5×10−3 Pa (Rotary + Diffusion Pump set) |
| Injection Precision | σ≤0.005g (Standard Deviation) |
| Cycle Time | 25 – 45 seconds per pipe (Standard 6mm pipe) |
| Weld Depth | 0.2mm∼1.0mm (Adjustable via current/pulse control) |
| Working Fluid Purity | Compatible with 18MΩ⋅cm Deionized Water |
| NCG Level | ≤1% of total volume (Post-sealing verification) |
| Gas Supply | Argon (99.999% purity) for welding shield |
Applications
- Phase-Change Cooling: Standard production for copper-water heat pipes.
- Electronics Cooling: High-precision filling for ultra-thin Vapor Chambers (VC).
- Industrial Heat Recovery: Large-scale heat pipe fabrication for heat exchangers.
- Aerospace: Specialized filling for ammonia or acetone-based heat pipes.
FAQ
Q1: How does the Filling Machine handle the "Cold End" effect?
A: The “Cold End” is caused by residual air. Our machine uses a “Twice-Evacuation” logic. It evacuates the pipe, fills it, and then performs a small “flash evaporation” to push out any remaining micro-bubbles of air before the final seal is welded.
Q2: Can your Dry-out Tester simulate actual CPU/GPU heat profiles?
A: Yes. The software allows for Transient Power Profiles. Instead of a steady increase, you can program “burst” loads (e.g., 50W to 200W in 2 seconds) to see how the heat pipe handles sudden thermal spikes, mimicking modern overclocking behavior.
Q3: What is the maintenance requirement for the Filling Machine's metering pump?
A: Since we use ceramic or sapphire pistons, the wear is minimal. We recommend a monthly flush with deionized water to prevent any mineral buildup, and a yearly calibration of the servo-motor steps to ensure injection accuracy hasn’t drifted.
Q4: How does the Multi-station Tester account for Ambient Heat Loss?
A: The software includes an Ambient Compensation Algorithm. During the initial setup, we calibrate the machine with a “dummy” insulated rod to measure the heat leakage to the air, which is then subtracted from the total power to give you the true Q flowing through the heat pipe.
Q5: Is there a data-tracking system for Industry 4.0?
A: Yes. Both machines can be equipped with Barcode/QR Code scanners. The test results or filling data are automatically uploaded to your MES (Manufacturing Execution System), allowing you to trace the exact vacuum level and Qmax of a specific heat pipe by scanning its serial number.