Problem 

Taiwanese manufacturers assembling AI servers face strict thermal management requirements. Automated application of thermal interface materials (TIM) — often particle-filled for conductivity — must deliver exact bead geometry and consistent A/B mixing ratios to meet heat dissipation and reliability targets. Manual or poorly controlled dispensing causes uneven coverage, voids, and premature component failure, while abrasive fillers shorten valve life and increase downtime.

Cause 

Key causes include:

(1) inconsistent volumetric metering from pneumatic or open-loop systems, (2) inability of standard valves to handle high-viscosity, particle-laden thermal greases without rapid wear, and (3) insufficient process integration between metering hardware and assembly robots, leading to placement errors at high throughput. Additionally, two-component thermally conductive adhesives require stable mixing ratios across wide viscosity ranges to achieve target thermal conductivity and cure profile.

Solution: KDP0350 Dual-Component Eccentric Screw Valve

Mingseal implemented the KDP0350 volumetric, continuous-flow dual-component eccentric screw valve in a Taiwan AI server production line to address these issues. The KDP0350 features two independently driven eccentric screws, enabling accurate A/B metering and inline mixing. Core technical advantages leveraged in the deployment:

• Volumetric precision: 0.35 ml per screw revolution, flow rate 0.7–14 mL/min, and measuring accuracy ±3% ensure repeatable bead weight and thickness.
• Wide viscosity handling: supports 1–1,000,000 cPs, accommodating low-fluid primers to high-viscosity, particle-filled thermal pastes.
• Wear-resistant materials: ceramic rotor paired with FKM/FFKM/EPDM stator options and hardened components extend life when dispensing abrasive, metal-filled TIMs.
• Closed-loop servo motor: precise positioning, programmable speed (1–60 rpm), and fault detection reduce variation and enable synchronized control with robot motion.
• Real-time pressure monitoring: two-component valve configuration prevents outlet blockage and maintains consistent mixing ratios (1:1–10:1).
• Compatibility with bulk supplies: supports 5-gallon/1-gallon drums and 300/600 ml syringes for continuous production.

Integration and Process

The KDP0350 was mounted to a six-axis robot with synchronized motion profiles. Dispense parameters (screw rpm, A/B ratio, dwell time) were controlled by the robot PLC and KSC3000-D controller, ensuring start/stop dispensing at precise coordinates. A static mixer downstream guaranteed homogeneous mixing before deposition. Inline vision and thermal-mass checks were added to verify bead geometry and deposit mass, closing the quality loop.

Results

• Precision and repeatability: Bead weight variation decreased by over 80%, meeting design tolerances for TIM layer thickness and improving thermal performance consistency across units.
• Reduced wear and longer maintenance cycles: Ceramic rotors and chemical-compatible stators extended core component life by more than 3× compared to standard metallic screws when processing metal-filled pastes.
• Process stability: Real-time pressure monitoring eliminated intermittent clogs, maintaining uninterrupted production and reducing scrap.
• Throughput and flexibility: Continuous-flow operation and bulk-feed compatibility supported higher line speeds and quick changeovers for different server models.

Application Guidance for Taiwan AI Server Lines

• Validate TIM rheology and particle loading; select ceramic rotor and FFKM stator for abrasive, chemically aggressive pastes.
• Program A/B ratio profiles per material specification and tie dispense start/stop to robot motion for precise bead placement.
• Use inline inspection (vision or weight check) to detect drift and trigger maintenance only when needed.
• Employ KSC3000-D controller for closed-loop servo control and pressure alarms to prevent defects and downtime.

Conclusion 

For Taiwan-based AI server manufacturers requiring precise, durable, and scalable TIM dispensing, the KDP0350 dual-component eccentric screw valve provides volumetric accuracy, broad viscosity capability, enhanced wear resistance, and robust integration with robotic assembly — delivering consistent thermal performance and longer maintenance intervals. For specification matching and on-site trials, contact Mingseal’s Taiwan support team.