Customer scenario

A Taiwanese systems integrator assembling AI servers required a reliable, high‑precision solution for dispensing particulate‑filled thermal gap pads and bonding adhesives during module assembly. Core modules include heat spreaders, high‑power ASICs and stacked memory where controlled, repeatable application of thermally conductive pastes (including abrasively loaded, particle‑filled formulations) is critical to thermal performance and mechanical durability. The customer sought a valve that could meter two-component materials accurately, handle abrasive fillers, increase wear resistance of bonded interfaces, and extend maintenance intervals on high‑volume production lines.

Mingseal KSP Series solution

Mingseal recommended the KSP Series two‑component screw valve (KSP0350B configuration) to meet the integrator’s requirements by combining precision volumetric metering with a robust wet path engineered for filled pastes.

Key technical fits

• Precision volumetric two‑component metering: The KSP screw architecture delivers linear, positive‑displacement flow proportional to screw rotation for both base and curing agent streams. This ensures accurate mix ratios and consistent shot masses across thousands of parts—critical for thermal conductivity and cure performance of the filled gap material.
• Abrasion‑resistant wet path: Wetted components in the KSP0350B are made from wear‑resistant alloys and engineered seals to withstand silica/metal oxide filler abrasion. This reduces clearance growth and maintains dispense accuracy when processing high‑particle‑loading thermal pastes.
  Homogeneous mixing and shear control: The concentric screw geometry provides gentle but effective in‑line blending, preserving particle dispersion without excessive shear that could alter rheology or introduce air. Consistent mixing maintains particle suspension for predictable thermal pathways after cure.
• High repeatability and throughput: Motor‑driven pulse control with encoder feedback enables fine resolution of shot volumes and rapid cycling to match AI server assembly takt times while ensuring repeatability across shifts and batches.
  Process integration and implementation
• Material and nozzle selection: Mingseal performed material characterization to select screw pitch, rpm maps and nozzle geometries optimized for the customer’s particle size distribution and viscosity range, avoiding nozzle clogging while ensuring full cavity fill.
  Closed‑loop quality control: Inline weight sampling and periodic microscope inspection of bead geometry were integrated into the line. If microbalance data drifted, the system auto‑adjusted motor pulses and flagged preventive maintenance before quality impact.
• Wear management and maintenance extension: The KSP0350B’s replaceable wear sleeves and scheduled purge cycles were configured to match shot counts, pushing mean time between service intervals well beyond the customer’s previous pneumatic dispensing setup.

Production outcomes and benefits

• Improved thermal performance: Consistent mix ratio and uniform particle distribution produced reliable thermal paths between ASICs and heat spreaders, improving steady‑state die temperatures and reducing frequency of thermal throttling under heavy AI workloads.
• Increased mechanical durability: Precisely controlled adhesive fillets and bonding layers increased shear and fatigue resistance of core components, lowering field failures from vibration and thermal cycling.
• Reduced downtime and lower TCO: Abrasion‑resistant wet path and planned preventive maintenance extended service intervals, reduced unexpected stoppages, and lowered total cost of ownership compared with disposable or pneumatic metering heads.
• Process traceability and compliance: The KSP system logs mix ratios, shot counts and maintenance actions for traceability—supporting quality audits and root‑cause analysis for high‑value server modules.

Conclusion 

For Taiwanese AI server manufacturers facing demanding thermal management and reliability targets, the KSP Series two‑component screw valve (KSP0350B) provides a rugged, high‑precision dispensing platform for particle‑filled thermal adhesives. By combining volumetric metering, abrasion‑resistant construction, and closed‑loop control, the KSP helps deliver stable thermal conductivity, enhanced component durability, and longer maintenance cycles—supporting higher uptime and predictable production costs. Contact Mingseal to schedule a pilot trial with your thermal compound and server module layout.