Is a Dispensing Machine Noisy? National Standards and Noise Reduction Methods

Many wonder whether a dispensing machine will be noisy in the workshop — the national standard answers clearly. GB/T 26799-2011 'General Specifications for Dispensing Machines' requires that noise under no-load operation not exceed 70 dB. The 2024 group standard for dual-five-axis high-precision smart dispensing machines (T/CASME) likewise caps no-load noise at 70 dB. What does 70 dB mean? Roughly normal speech or a busy street background — it will not harm operators' hearing or health.

2. Real Workshop Noise Levels

The standard covers no-load noise; loaded noise in production runs slightly higher

. A single dispensing machine in a real workshop measures about 76-80 dB; with proper layout, vibration isolation and sound insulation, boundary noise can drop to 55-60 dB, meeting the daytime 65 dB limit for Class 3 areas under the 'Industrial Enterprise Boundary Environmental Noise Emission Standard'. In other words, one dispensing machine alone is not loud, but with several machines running plusair pumps and punch presses, noise stacks up and needs treatment.3. Where the Noise Comes From

Dispensing machine noise has three main sources.

First, the motion system

: servo motors drive screws moving the XYZ axes at high speed; motor rotation and screw transmission both generatemechanical noise— the faster, the louder.Second, the pneumatic system

: dispensing relies on compressedair drive; solenoid valve switching, air pump operation and exhaust all produce airflow noise.Third, structural resonance

: frame, worktable and sheet-metal housing may buzz in resonance during high-speed motion — especially obvious on poorly assembled small-shop machines.4. Noise Reduction Methods

Noise reduction can start from several angles.

Equipment level

: choose compliant products from reputable makers, and check forvibration-damping feet and sound-insulation foamInstallation level。

: the machine base must be level and solid; adddamping padsto reduce structure-borne transmission; air pumps can be placed outside the workshop or fitted with silencers.Workshop level

: space machines sensibly, separate loud and quiet equipment into zones, and applysound-absorbing treatmentManagement levelto moving parts such as rails and screws. Learn moreWhat Is the Motion Control Card in a Vision Dispensing Machine?。

staff in loud zones should wearnoise-blocking earplugs, and moving parts should belubricated on scheduleto reduce abnormal noise.

5. Boli Machine Noise Performance

All Boli BL serieswith intelligent vision recognition and precision fluid control, delivering clean edges, saturated color, zero overflow and zero color deviation. Learn moremodels use screw + servo transmission with Xinsheng screws and Leadshine servos, about 1500-2000W, AC-220V, moving at 800/500 mm/s. Compact structure and disciplined assembly keep no-load noise within the national standard. When purchasing, confirm noise specs with the vendor and, if necessary, test on site with a sound-level meter before ordering.

6. Summary

The national standard GB/T 26799 caps dispensing machine no-load noise at 70 dB; real loaded noise is about 76-80 dB. Noise comes from the motion system, pneumatic system and structural resonance; it can be effectively reduced bychoosing compliant products, adding damping pads, sensible layout and regular lubrication/ How to Maintain a Dispensing Machine?