The neck-handling pneumatic conveyor is designed to move empty plastic bottles hanging from their neck rings from unscrambler to filler or from blow moulder to filler.


Operating Principle

The pneumatic conveyor is composed of a square cross-sectional body with an opening on its lower side, inside which the bottles glide sustained by neck guides, while lateral guides direct the bottle body. On the conveyor body’s upper side there are some mouths, whereon the fans are installed; on the lower side, around the bottle neck ring, there is a duct made either of plastic material or stainless steel, with holes or slits oriented in the bottles running way; the body inside, designed so as to prevent load losses, is put overpressure by the fans so the air, coming from the oriented holes, generates a flow that pushes the bottles ahead on their necks in the working direction. The upper side of the conveyor is provided with doors that can be opened, to make easier any potential operation of inspection or cleaning. The body is made of stainless steel sheet, laser cut folded and shaped in modules of different sizes, so that the composition of a conveyor of whatever length can be carried out through the assembly of industrially finished pre-worked parts, achieveing an excellent and homogeneous aesthetic result. Thanks to this solution carriage and fitting up are easier and faster as well, even with conveyors of remarkable length which can be installed on the production site using pre-assembled parts. It is possible to manufacture uphill or downhill sections, allowing to overcome obstacles, and also elevated conveyors in such a position as not to be a hindrance to other machines on the ground.

The lateral guides are adjustable in width, in order to adapt to the different bottles formats to be handled; changeover operations are fast and accurate thanks to preset fixed positions for the bottle body guides and they are carried out either manually or automatically, by means of pneumatic or electric actuators, controlled by the operator’s panel. Depending on the bottles to be handled, it is also possible to regulate the air distributing system by means of manual valves or through motors speed electric control via inverters; the inverters can be mounted either directly on each fan motor or inside the electric panel board. The bottles flow on the conveyor is automatically controlled, according to the needs of the linked machines, through photoelectric cells that check the accumulation state along the route. Accessory elements, such as dividers, combiners and height-adjustment devices for bottle neck height regulation, are available for the purpose of obtaining the required distribution to the linked machines. At the conveyor infeed, at the point where the bottles are received from an unscrambler or a blow moulder for instance, a pneumatic ejector can be installed in order to automatically discard any bottle that should arrive already misshapen, ensuring a continuous and regular working.