Several Types of Sealing Machine Designs for Insulated Glass Equipment

Author:

Insulated glass equipment is primarily used to produce double-pane or multi-pane glass with a hollow space between the panes. Given the current strong market demand for insulated glass and the critical importance of production quality, insulated glass production lines must maintain strict quality control. To inspect insulated glass, a small knife can be used to cut open any of the joints to verify whether the joints have been effectively sealed with butyl adhesive. Practice has shown that in double-sealed insulating glass units manufactured using the corner-sealing method, water penetration pathways are primarily concentrated at the four corners, where the water penetration rate reaches 70%, while the rate along the edges accounts for only 30%. Therefore, continuous bent aluminum spacers should be used whenever possible, or the four corners should be effectively sealed with butyl adhesive to significantly extend the service life of the insulating glass; if the four corners are not effectively sealed with butyl adhesive, the effectiveness of the double-seal design will be greatly diminished.

During the production of insulating glass, use a small knife to cut a few centimeters into the two cross-sections where the secondary sealant adheres to the glass, then peel the sealant outward by hand. If the glass surface is smooth with no sealant residue after peeling, it indicates that the sealant has no adhesion to the glass surface, and the sealing effectiveness cannot be guaranteed. When cutting a cross-section of the secondary seal with a small knife, the presence of numerous small air pockets (small honeycombs) may indicate two possible scenarios: first, air was trapped during manual application, creating bubbles; second, low-quality secondary sealant was used, which would result in air pockets even when applied by machine. As long as air pockets are present in the cross-section, the service life of the insulated glass unit will inevitably be significantly shortened.