Gypsum Board Shrinkage Measurement System

Make Cost Savings and Reduce Waste

The LIMAB gypsum board shrinkage measuring system continuously and simultaneously measures the length of wet gypsum boards immediately after the shear and the length of the boards at the exit of the dryer and then by comparing the two, it calculates the exact shrinkage. Once the exact shrinkage of the board is known, the over-length safety margin can be reduced without fear of cutting too short, which means the amount of board cut away after the dryer is reduced, saving both production costs and reducing waste. Reducing the amount of board cut away after the dryer by just 2 mm, will save 0.08% of all production costs on a typical length board, which means very short payback on the initial system investment.

The LIMAB gypsum board shrinkage measurement system can be supplied as a standalone solution consisting of two non-contact LaserSpeed Doppler length gauges, mounting brackets, laser photocells, cables, software integration, and site commissioning or it can be integrated into an existing GMS1100 gypsum board measuring system.

LIMAB GMS1100 Software Integration

Many of the world’s best-known gypsum board producers are already using the LIMAB GMS1100 system to measure the full dimensions of gypsum boards inline. This system can now be upgraded to provide real-time board length and calculate the board shrinkage in the drying process.  The length of the wet boards immediately after the shear (Avg. length knife) and the length of the boards at the exit of the dryer (Avg. length dryer) are displayed and length trend data is logged together with the other-dimensional data for all boards produced. The top screenshot shows the board profile, with average length at both the shear and the dryer. The bottom one shows the trends, including the lengths.

GMS1100 Screenshots

Gypsum Board Shrinkage

Gypsum Board Shrinkage

Gypsum Board Shrinkage