Edge Deletion

Edge Deletion Machines for removing the low-e perimeter (softcoat) surface coating from the edge of a glass panel prior to its use in an insulated glass sealed unit. Edge deletion is necessary because the low-e coating on the glass surface affects adhesion with insulated glass sealants. Removal of the edge coating means that the sealant can bond directly to the glass. Thermoseal Group's edge deletion machines have a simple but effective structure composing of two grinding wheels on carriages at right angles to each other and fastened to a felt-lined table. The semi-automatic version is powered by electric motors attached to these carriages. The function is started by simply pressing a button which automatically drives the grinding heads along the glass edge. The carriages run along linear rails driven by pneumatic cylinders providing a smooth operation at a constant speed. Depending on the size and shape of the glass, both wheels move at the same time to reduce cycle time. On the longest side, the grinding wheel will move to the end of the glass and stop at this position which saves on cycle time if a small pane of glass is being processed. The grinding wheel is lifted and lowered to the glass by pneumatic cylinders. Alternatively, the manual version is operated by sliding the heads by hand. When two sides have been deleted the glass is manually turned through 180 degrees to delete the low-e coating on the remaining two sides. The glass is held in the working position by a vacuum cup system controlled from the operator position. Air floatation is provided for larger pieces of glass by an electrically driven fan mounted beneath the table bed. There are simple adjustments for glass thickness, wear on the grinding wheels and amount of the coating to be removed. Vacuum suction is provided for the removal of dust generated by the removal process; this vacuum is again mounted beneath the table bed. Maximum glass size: 1980mm x 1000mm x 10mm. Other table sizes available on request.

For more information on Edge Deletion talk to Thermoseal Group Ltd