Device for selectively breaking crosslinked bonds of vulcanized rubber

The utility model relates to the technical field of recycling of waste rubber materials, in particular to a device for selectively breaking vulcanized rubber crosslinking bonds. The device adopts a screw extruder and comprises a feed port, a heating section, a desulfurization section, a cooling section and a discharge port, the screw centers of the heating section and the cooling section are aligned with the axis of the machine, the desulfurization section adopts an eccentric design, and the eccentric size is determined by the total diameter D and gaps d21 and d22 between an eccentric screw of the desulfurization section and the side wall; and the length L2 of the desulfurization section in the screw extruder and the gaps d21 and d22 between the eccentric screw and the side wall meet the condition that (d21-d22)/L2 is more than 0.012 and less than 0.022. The device greatly retains the high molecular weight content, reduces the sol content, and ensures that the physical property of the reclaimed rubber is not