Road marking machines are machines that apply road markings such as lines, arrows, symbols, and so on. They are used for traffic control, safety, and decoration. Materials used in road marking machines include thermoplastic, cold paint, cold plastic, and others. The line width can range from 100 mm to 500 mm or more depending on the material and application technique.

One of the factors that affect the line width is the spray gun or the nozzle. This is the part of the machine that sprays the material onto the road surface. The spray gun or the nozzle has an opening that determines the width and the angle of the spray pattern. By adjusting the opening size and the distance from the road surface, the line width can be changed. For example, a smaller opening and a closer distance will produce a narrower line, while a larger opening and a farther distance will produce a wider line.

Another factor that affects the line width is the screed box or the die. This is the part of the machine that shapes the material into a line as it is extruded from the kettle or the tank. The screed box or the die has an opening that determines the width and the thickness of the line. By changing the opening size, the line width can be changed. For example, a smaller opening will produce a narrower line, while a larger opening will produce a wider line.

A third factor that affects the line width is the number of spray guns or screed boxes. Some road marking machines have multiple spray guns or screed boxes that can be used simultaneously or separately to create different line widths. For example, a machine with two spray guns can create a single wide line or two narrow lines by adjusting the distance between them. A machine with two screed boxes can create a single wide line or two narrow lines by switching on or off one of them.

To summarize, road marking machines can mark lines in different widths by changing the spray gun or nozzle opening size and distance, the screed box or die opening size, and the number of spray guns or screed boxes. These factors need to be balanced and calibrated according to the specifications and requirements of each project.