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3M: Lab-Scale Pavement Dispenser

Project Summary

3M designs reflective pavement marking strips that improve road safety. Our project is to design a particle dispenser that distributes reflective particles onto pavement marking strips. This product is used in a lab setting to improve 3M's testing procedure for pavement markings.

Design Goal

The aim of our project is to develop a more repeatable testing process for applying reflective particles onto pavement markings. Through uniform distribution and applying multiple particle types, our goal is to optimize 3M’s testing process to contribute to safer roadways worldwide.

Design Constraints

  • Must be able to apply particles evenly across a 12" x 48" test strip.
  • Must be able to apply between 50 – 400 grams/min.
  • Must be able to apply two separate particles independently.
  • Contain excess particles for reuse.
  • Be movable and convenient in a lab setting.
Particle distributor

Particle distributor

Particle distribution system (to the left) sits on top of the conveyor belt. The pavement marking strips will flow from the left side to the right and be covered in particles.
3M reflective pavement marking strips

3M reflective pavement marking strips