MB Conveyors Soft Drop – Preforms transport & storage

The Soft Drop, our ‘Gentle Giant’, which softly lays the preforms inside the boxes by using an ultrasound sensor: in this way the Soft Drop can drop the preforms from a minimum height, avoiding any possible damage to the preforms.

SOFT DROP System for PET preforms storage

Since 1991, MB Conveyors has produced a very efficient system to eliminate damage caused to PET preforms during storage inside the container.
The operating principle of the Soft Drop: the moulding cycle is received from the IMM and conveyed by means of a CPT conveyor to the PA conveyor/distributor installed for the programmed filling of hoppers/lowerators.
When the loading phase ends, the hopper descends into the storage container and, using an ultrasound sensor, releases the preforms at a minimum predefined height. This release height remains constant throughout the container filling phase. When the first container is filled, filling of the second container begins, while an acoustic-visual alarm warns the operator that the filled container must be replaced with an empty one.


Dimensions of containers for standard Soft Drop: base 1000 x 1200 x h. 1200 m

Standard Soft Drop complete with control panel

Main implementations of Soft Drop:
– quality control by weighing with tolerance 0 to + 12 preforms per container
– installation of vibrating platforms
– construction of loading conveyor complete with cooling device