Scribe and Break

In working predominantly with flat sheet glass materials, scribe and break is the most common method of sizing glass substrate at Coresix. A series of precision CNC scribe tables accommodate large stock sheet glass purchased, whenever possible, directly from the manufacturer’s production line. This assures a minimal amount of handling defects coming into our process. We then take careful measures throughout our scribing process to prevent the introduction of surface or edge defects.

Scribe and Break Process: Scribing is performed by rolling a small diamond wheel across the sheet to create a shallow “vent” in the glass surface. The accuracy and quality of this vent can affect the dimensional accuracy, edge quality, product strength and overall cleanliness of the finished product. The primary variables in achieving the best scribe include blade quality, wheel angle, scribe pressure, and cutting fluid. All of our machines are CNC programmable on two axis and are equipped with rotating cut heads providing accuracy on straight lines or radius to as tight as 25 microns.

Once the scribe is complete, our operators proceed to “break” the glass along the vent line. It is the experience and proficiency of the operator that further assures the quality of the edge through both breaking technique and monitoring of the scribe variables.

Coresix has a broad range in scribe and break capability with thickness from 50 microns to 15 millimeters. Sheet sizes up to 2300mm can be accommodated on our largest machines and finished parts down to 5mm can be scribed by our smallest machines. We specialize in the scribe and break production of both rectangular and shaped parts from micro sheet glass – including ultra-thing Willow Glass from Corning.