KHS preform deduster

PET preforms can be soiled for a number of reasons. Sometimes particles such as PET dust or foreign bodies, including splinters of wood or fragments of PET, can enter preforms during production, transportation or storage, leading to rejection of the preform during inspection.

Although the rejection rate for soiling of this kind is usually under 0.5%, at high production volumes this can translate into significant cost.

A preform deduster from KHS can be located upstream of an inspection system. Using a compressed air lance inserted into each preform, the system removes unwanted particles at a rate of up to 81,000 preforms/h. As a result, not only are considerably fewer PET preforms lost, the risk posed by contaminated preforms is further minimised when used in combination with an inspection unit.

The cleaning system is supported by an extraction unit which ejects all particles into an easy-to-clean collection vessel.

The cleaning module has been designed so that it can be retrofitted for all customers with InnoPET Blomax stretch blow moulders in series III and IV.