Automotive windshield polyurethane automatic dispensing system
Modern car design, especially for car design, uses direct bonding technology for the window glass. This assembly process connects the window glass with the body, which greatly increases the rigidity of the body and improves the sealing effect of the window. The early window glass bonding process was adopted in the United States, using a two-component polysulfide adhesive. Due to the complexity of the two-component dispensing equipment, automotive windshield adhesives now basically use better performance singles. Component moisture-curing polyurethane glue. In order to ensure the quality of bonding, today’s window dispensing basically uses an automatic dispensing system.
One-component polyurethane automatic dispensing system
The viscosity of polyurethane glue is very high, especially when the viscosity is increased rapidly below 5 °C, so the viscosity can be reduced by heating slightly. For the characteristics of polyurethane glue, it is common to use a double-column plunger pump with large cross section to improve The rubber water bottom plate presses the rubber strength, and the rubber water water bottom plate has a heating function to better assist the plunger pump to press out the glue. The plunger pump optional pressure ratio is usually greater than 60:1. In order to reduce the pressure drop of the glue, the rubber hose is discharged. Both use high-pressure hose with heating and heat preservation function, and its diameter is at least 25.4mm, to ensure that the flow rate of glue meets the requirements of dispensing speed; then the polyurethane supply system is double pump configuration to ensure the automatic dispensing system. normal work.