scope:

This Guideline applies to:

- coremaking machines instalied as individual ma¬ chines with manual or automatic control. It is independent of the coremaking method, e.g. Cold Box, SO2, CO2, Hot Box or shell-core-method.

- jolt and squeeze moulding machines with a load between 1 kN and 20 kN in "Standard design", instalied as individual machines and equipped with a pneumatically operated vibrator. It applies to machines with bumpertype vibrator as well as to machines with anvil-type vibrator, for machines with foundation ditch and for machines with flat foundation;

- moulding machines, working after the shooting, suction, airstream and air impulse principle which are part of an automatic moulding production line;

- knock-out grids and knock-out trays, used in the foundry industry to separate sand and casting and, in case of knock-out trays, also to transport the castings. It applies to all grids independent of the grid deck dimensions and the excitation mechanism;

- dry blasting equipment used for desanding, descaling or other surface treatment procedures of the object to be blasted:

• centrifugal wheel blast equipment (blasting abrasive media is accelerated by means of centrifugal wheels)
• air blasting equipment (blasting abrasive media is accelerated by means of pressurized air)

Purpose

This Guideline includes a description by means of examples of the noise emitted by the machines mentioned in the above scope with the noise emission having been determined by means of standardized measurement methods (see clause 3 and 4.3). The characteristic emis¬ sion values defined in 4.1 and presented in clause 5 are used to describe this emission.

Furthermore, clause 6 of this Guideline includes state¬ ments concerning the declared noise emission values, and Annex A provides references to noise reduction methods that have been proven in practice.

This Guideline can assist its users - designers, manufacturers, operators and institutions dealing with the evalua¬ tion, checking and control of the noise emission of such machines - in performing the acoustic evaluation of a Single machine.