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LENJEX industrial ultrasonic cleaning equipment
Automatic multi-stage line for automotive parts

LENJEX Project Record

Multi-Stage Cleaning for a German Automotive Supplier

A Tier-1 supplier added a clean-rinse-dry line to meet particle limits before engine assembly.

LocationStuttgart, Germany
IndustryAutomotive Tier-1 Supplier
EquipmentLJ-CRD80 multi-stage clean-rinse-dry system
Commissioned2025

Project Context

Particle limits were tightening

The supplier machined valve and pump components in volume, and the existing spray washer left particles in cross-drilled holes and detergent residue on precision surfaces.

Assembly quality and the customer's cleanliness specification called for a repeatable, measurable process.

Before LENJEX

Where the spray process fell short

Spray washing depends on line-of-sight, and internal passages and recesses were not reached consistently.

  • Particles in cross-drilled holes
  • Detergent residue on surfaces
  • Inconsistent drying and water marks
  • No measured particle result
Multi-tank clean-rinse-dry system
Clean-rinse-dry configuration for the automotive project

Cleaning Solution

A multi-stage clean-rinse-dry line

The LJ-CRD80 combined heated ultrasonic wash, counterflow rinse and drying, with filtration and oil skimming on the wash stage.

Process parameters were confirmed by trial cleaning and the agreed particle inspection method.

Project Outcomes

Cleaning results and process improvements

Performance depends on the workpiece, contamination, chemistry, loading method and acceptance criteria.

  1. Result 01Particle limits met consistently on the inspection line
  2. Result 02Cross-drilled holes cleaned without manual touch-up
  3. Result 03Elimination of water marks before assembly
  4. Result 04Reduced rework at the assembly stage
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