Field Test: High-Performance Dosing of Abrasive Copper Solder Paste

At one of Germany’s top tier-one automotive suppliers, ViscoTec’s 3RD12 dispenser proved its capability in a high-demand, high-abrasion environment—dosing copper-filled solder paste continuously in a fully automated 24/7 operation.

The glycol-based paste, with a density of 4.0 g/cm³, posed a serious challenge due to its abrasive particle content. Four dosing stations using ViscoTec systems were operated in parallel over a nine-month test period.

Remarkable Wear Resistance in Long-Term Use

The 3RD12 was operated at 30% of its max speed to reduce internal wear and flow velocity. After nine months:

• The elastomer stator showed minimal deviation: just 0.04 mm.

• The stainless steel rotor showed no measurable wear.

This outcome demonstrates exceptional durability, low maintenance requirements, and the effectiveness of ViscoTec’s dosing technology in abrasive applications.

Why ViscoTec Excels in Solder Paste Dosing

Used widely in automotive electronics, solder pastes are complex to handle due to their abrasive nature. ViscoTec’s eccentric screw pump technology meets these challenges with:

• Pulsation-free and shear-sensitive dosing

• Uniform volume flow to prevent sedimentation

• Low pressure operation to protect filler material

• Customizable speed control for material-specific needs

Proven Performance in Demanding Conditions

The test’s success was made possible through ViscoTec’s in-depth engineering, collaboration with material manufacturers, and continuous optimisation of elastomer components.

Whether for thermal pastes, solder pastes, or high-viscosity sealants, ViscoTec dispensers deliver precision, efficiency, and extended service life in even the most challenging industrial environments.