Cutter device of SBS (Styrene-butadiene thermoplastic elastomer) expansion dryer and manufacturing method thereof

Abstract

The invention discloses a novel cutter device and a manufacturing method thereof. The cutter device comprises a cutter and a cutter head; the cutter is molded by integrally pressing a rectangular steel plate on a pressing mould and is provided with a base plate and a cutting edge side plate between which a certain included angle is formed; a cutting edge is formed on the cutting edge side plate; the cutter head includes an inner cutter head and an outer cutter head which are fixed together; and the cutter is fixedly connected with the cutter head to form the cutter device. The cutter provided by the invention is simple to machine and manufacture and has low cost. By adopting the novel cutter device, the service life of the cutter of an expansion dryer is prolonged, the particle-cutting effect is obviously improved, the vibration of the device and the weights of the cutter and the cutter head are reduced, and it is convenient for overhaul and maintenance.

Description

Technical field [0001] The invention relates to a cutting knife device including a cutting knife and a knife disk and a manufacturing method thereof, in particular to a cutting knife device of an SBS expansion dryer in the synthetic rubber field and a manufacturing method thereof. Background technique [0002] In the synthetic rubber production process, the agglomerated rubber particles are dehydrated by an extrusion dehydrator to reduce the free water content below a certain range, and then enter the expansion dryer. The material is extruded by the screw in the expansion dryer and violently friction with the shear pin, heated to melt, expanded and dried, and finally cut into granules by the extruder and the cutter device set outside the die plate. [0003] However, in the prior art, in order to improve the production capacity, the SBS (styrene butadiene thermoplastic elastomer) device has been modified many times, especially the modification of the SBS dewatering extruder and the ...

AI Technical Summary

Problems solved by technology

[0004] 1. The cutter shaft and the cutter bearing seat are worn or the bearing is damaged, and a total of 11 inspections have been performed;

[0005] 2. Other failures of the cutter device, a total of 3 inspections;

[0006] 3. The maintenance time of the cutter device is 144 hours

[0008] 1. It is difficult to adjust the gap between cutters;

[0009] 2. The structure of the cutter is complicated, and the machining accuracy is difficult to guarantee;

[0010] 3. Stress concentration at the root of the cutter blade makes it easy to break

It can be seen that there is no relevant technical solution disclosed in the prior art to solve the above technical problems

Images