The roller kiln and the prefabricated oven with lighted carriages represent, under precise design conditions, a timely and integrated response to the request of a heat treatment system that allows rapid firing of sanitary materials. The low thermal inertia represented by the prefabricated modular structure, obtained with the use of light refractory bricks in the first face and ceramic fibers in the second, represents a necessary condition to give elasticity and manageability to the thermal machine.
For the hypothesised conditions to be realized, however, the plant installed on the machine and the control and regulation devices have been designed in a manner consistent with the required elasticity and manageability. Made these conditions the
the choice between a roller kiln and a fork-lift kiln will be based essentially on the production potential required, on the variety of the planned type or, more generally, on the approach to be made to the production line to be produced, which is the main object of discussion. It should always be remembered that as the dough and the enamel are to be designed according to the thermal cycle that is to be realized, so too the oven to be used must be designed according to the entire production line. Intensive high speed burners are installed on the ovens. The burner types are selected and alternated according to the thermotechnical characteristics of the various zones and the particular functions that are assigned to them in the operating economy of the kiln. Each burner is equipped with automatic ignition and flame control. The rolls are moved by means of a gear transmission.
Each roller is supported on both ends by bearings rotating on bearings. The rotational component is transmitted from the drive shaft to the roller by means of a spring-loaded coupling. The kinematic principle that characterizes the movement is of the bevel gear type with differentiated speed. The gears are made of sintered material. Therefore no lubrication is required. Each oven module has a corresponding movement section driven by a reduction unit and the various groups are connected by means of transmission shafts. At the ends of the gearboxes – trees, two motovariators drive the whole system.