Composite screw
Due to the increasing number of new types of sticky and abrasive materials and where it is not possible to use an axisless spiral due to the necessity of filling with transported material, we use robust plastic screw conveyors RATAJ® (types, RP, RPN) consisting of plastic segments forming screw and piping. These segments can be slid onto the hexagonal shaft in a very simple way and, using locks, create a very robust, non-bearing worm conveyor construction.
These conveyors are also used for demanding applications for conveying abrasive materials. Their main advantage is especially light construction and quiet operation. The plastic auger is several times lighter than a steel spiral and, in combination with the corresponding piping, these conveyors can also be used for applications that require continuous conveyor operation without the conveyed material. It is mainly used in the food industry (sticky and wet materials), in the chemical industry (aggressive substances) and last but not least in heavy industry, energy and construction. For food, the color segments are white and have a food contact certificate for food contact, for the abrasive materials, the color segments are red, and for conveyors intended for use in potentially explosive atmospheres, the color segments are gray.