FIELD: tire industry; production an element of a pneumatic tire based on rubber mixtures.
SUBSTANCE: the invention is pertaining to the field of the tire industry and may be used at production of an element of a pneumatic tire based on rubber mixtures, two of which one form a tire tread. The method of production of an element based on the rubber mixtures and intended for production of a pneumatic tire provides for extrusion of at least two layers of the rubber mixtures with the help of the main extruder supplied at least with two extrusive feed screws having accordingly the channels of outflow opening into one and the same hole of then extruder limited by the first and the second walls of a plate. Then using extrusion simultaneously through two layers interpose at least one insert made out of the rubber mixture with the help of a microextruder nozzle. The nozzle of the microextruder is pressed to the second wall of the plate of the main extruder. The device for extrusion of the rubber mixtures has the main extruder with an extrusion head with at least two outflow channels for each of two rubber mixtures. The channels are going in one and the same hole of the extruder, through which the two rubber mixtures are extruded. The hole of extrusion is limited by the first and the second walls of the plate. The device contains at least one microextruder intended for extrusion of the third rubber mixture. The head of the microextruder on its end is supplied with a nozzle, which is inserted in the first wall of the plate of the main extruder so, that the nozzle is placed in the hole of the main extruder and pressed to the second wall of the plate of the main extruder so, that to feed the third rubber mixture into a profiled structure, made out of the rubber mixtures coming out of the main extruder. The invention allows to produce elements of the tire out of rubber mixtures.
EFFECT: the invention ensures production of elements of the tire out of rubber mixtures.
7 cl, 3 dwg
