Glass laminating in the automotive industry consists of bonding two layers of glass with glass vinyl captured in between. One process that takes place in the completion of the windshield is to turn the opaque vinyl between the two layers of glass clear. This is achieved with a machine called a “nipper.”

This drawing shows a Proportion-Air MM1 pressure controllers controlling force on the nipper rollers for consistent force across the entire glass face. The MM1’s repeatability of ±0.02% of full scale calibration makes it an ideal candidate to use in this application.

The MMs are mounted on a single manifold that shares a common supply pressure and common exhaust port. However, each MM is separately commanded to control force in a unique cylinder. Since all MMs are commanded to the same force, they adjust independently to resistance and dips in the glass to create uniform force across the entire windshield.