A crack sealing machine is a specialized device used for repairing road cracks, with core functions including heating, conveying, and injecting filling materials (such as asphalt, rubber-modified asphalt, etc.). Its main components are as follows:

1. Power System

• Engine/Electric Motor: Provides power to drive the entire machine, commonly using a diesel engine or electric drive.

2. Heating System

• Burner: Used to heat the sealing material (e.g., asphalt blocks or sealant) to a flowable state.

• Thermal Oil Heating System (some models): Ensures even heating of the material tank through thermal oil circulation.

• Temperature Control Device: Precisely regulates material temperature to prevent overheating or solidification.

3. Material Tank (Melting Tank)

• Storage Tank: Stores and heats the filling material, typically with a capacity ranging from 50 to 200 liters.

• Agitator: Prevents material sedimentation or localized overheating.

4. Pumping System

• Hydraulic Pump or Gear Pump: Pressurizes and delivers the melted filling material to the spray gun.

• Pressure Regulator Valve: Controls material flow rate to ensure even application.

5. Injection System

• Spray Gun/Sealing Nozzle: Directly injects material into cracks, with some models allowing adjustable output.

• Hose: Heat- and pressure-resistant, connecting the pump and spray gun.

6. Mobility System

• Push-Type: Small machines usually have wheels for manual operation.

• Vehicle-Mounted: Larger machines are installed on trucks or trailers for enhanced mobility.

7. Control System

• Control Panel: Adjusts parameters such as temperature, pump speed, and injection volume.

• Safety Devices: Include over-temperature alarms and pressure protection.

8. Auxiliary Components

• Cleaning Tools: Used to remove residual material from the spray gun and tank.

• LPG Tank (if gas-heated): Supplies fuel to the burner.

Different models of crack sealing machines may vary, but the above structure covers the core functional modules.