Height control arrangement for a strike-off plate

摘要

A height control arrangement for a strike-off plate of an asphalt paver screed assembly is disclosed. The screed assembly has at least one main screed unit and at least one screed extension unit mounted in front of the main screed unit. The height control arrangement includes an actuator connected with the strike-off plate mounted in front of the main screed unit at a position ahead of the screed extension unit. A sensor measures the amount of material built up behind the strike off plate and sends an input signal to a controller responsive to the amount of material. The controller sends a control signal to the actuator to adjust the height of the strike off plate responsive to the magnitude of the input signal.