Hot milling machine

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A hot cutter (also hot milling machine ) is a construction machine , which in the road is applied and asphalt layers can ablate different thickness.

history

Hot milling was the first effective way to renew the pavement of a street without removing the entire layer of asphalt. This technique was first used successfully in 1971. At the end of the 1970s, however, the use of hard metal chisels from mining was taken over, so that the surface no longer had to be preheated. So-called cold milling then almost completely replaced hot milling. The reasons for this were the high energy consumption for heating the top layer and the strong smoke development. With the help of cold milling technology, milling work can also be carried out on concrete road surfaces, as the chisels can remove the high-strength concrete.

Mode of action

The hot milling machine moves over the layer to be milled, whereby a horizontally rotating milling drum is lowered according to the milling depth and loosens the material. The milled material is then conveyed via a conveyor belt to the end of the machine and there it falls into a truck.

The machine can mill the road surface both parallel to and at a certain incline to the road surface. During the milling , the set milling depth can be regulated in relation to a previously defined reference height. Before these work steps, however , the asphalt surface must be heated up strongly: This is usually done using flat gas heaters attached to the milling machine.

literature