The noise generated by CNC lathes mainly comes from mechanical movement, cutting process and interaction between tool and workpiece. For noise blocking, some of the following measures can be taken:

1. Machine tool structure design: The structure of the machine tool should be considered when designing CNC lathes, and anti-vibration and sound insulation design principles should be adopted. Increasing the rigidity and stability of a structure can reduce vibration transmission and therefore noise.

2. Vibration reduction measures: Use vibration reduction materials, such as rubber pads or spring systems, on the CNC lathe base or support to reduce the transmission of vibration. This helps reduce vibration and noise at the source.

3. Cutting parameter optimization: Adjust CNC lathe cutting parameters, such as cutting speed, feed speed and cutting depth, to reduce friction and vibration between the tool and the workpiece, thereby reducing noise.

4. Tool selection and maintenance: CNC lathes use high-quality, low-wear tools, and regularly inspect and replace severely worn tools. Severely worn tools can easily cause vibration and noise.

5. Precision bearings and transmission systems: CNC lathes use high-quality bearings and transmission systems to ensure they are well lubricated to reduce friction and vibration between various parts of the machine tool.

6. CNC system optimization: By optimizing the control algorithm of the CNC system, CNC lathes can more accurately control the movement of the machine tool, reduce impact and vibration during movement, and reduce noise levels.

7. Soundproof cover and soundproof wall: Set up a soundproof cover or soundproof wall around the CNC lathe to localize the noise and reduce the spread. This sound insulation helps protect the surrounding environment from machine noise.

8. Motion balance: Ensure the balance of each axis of the CNC lathe to prevent vibration and noise caused by imbalance. Regularly check and calibrate the balance of machine tools.

9. Regular maintenance: Perform regular maintenance on CNC lathes, including lubrication, tightening bolts, cleaning chips, etc., to ensure the normal operation of each component of the machine tool and reduce the occurrence of abnormal noise.

10. Ergonomic design: The CNC lathe is designed to meet the ergonomic working environment, reducing the distance between the operator and the machine tool, and minimizing the impact of noise on the operator.

These measures can be used individually or in combination, with the specific choice depending on the source of the noise and the specific design of the CNC lathe.