Automated Meter Mix Dispensing Dynamics for Thermally Conductive Gap Fillers
Volumetric displacement precision, shear rate thermal control, and wear-resistant fluid metering govern automated thermal gap filler dispensing performance.
Dual Piston Servo Pump
Meaning
Precision dispensing instruments use independently controlled displacement cylinders to deliver a continuous and pulseless flow of viscous fluids. A dual piston servo pump achieves this behavior by coordinating the motion of two separate chambers so that one discharges while the other refills. This arrangement prevents the pressure drops and flow interruptions common in single-chamber designs.
It is widely applied in automated assembly lines for dispensing thermal interface materials.
Flow Mechanism
Coordination of the two pistons is managed by high-resolution servo motors that adjust speed in real time. As the active piston completes its dispensing stroke, the secondary piston accelerates to match the flow rate before taking over the delivery task. This overlap phase ensures that fluid discharge remains uninterrupted at the output nozzle.
Automated valves control the inlet and outlet paths to coordinate this cylinder transition.
Volumetric Accuracy
Maintaining precise shot volumes is critical when applying highly filled gap fillers or two-part adhesives. The encoder feedback from the servo drives allows the pump to control piston displacement within micrometers. This mechanical precision translates directly to repeatable deposit sizes, even when fluid viscosity changes due to temperature fluctuations or batch-to-batch variations.
It ensures that every electronic component receives the exact amount of material required for proper thermal transfer.
Dispensing Control
Software integration allows operators to program specific dispensing profiles that match the geometry of the target part. This control covers start-up pressure, flow velocity, and snuff-back action to prevent dripping at the end of a cycle.