Pipe spinning machine after modification
The solution
A number of modifications to the machine were made, including the following:
stiffening the main bearing supports;
isolating the supports from the main machine chassis, and the chassis from its supporting beams using proprietary machine mounting pads;
sand-filling the chassis support beams and isolating them from the floor with similar pads;
isolating the water cabinet from the machine support structure using the machine mounting pads;
using rubber-bushed hinges on the water cabinet roof panel;
fitting duct attenuators over steam vent outlets in the water cabinet roof;
relocating the hydraulic power pack outside the shop.
The cost
About £2000. (1995)
The result
An overall noise reduction in the mould shop of 6 to 7 dB.
Source
Photographs courtesy of Glynwed Foundries. Consultants' report supplied by Sound Research Laboratories Limited, Wilmslow.