Tire molding drum

Abstract

The invention provides a tire molding drum, aiming at solving the tire quality problems in the prior art that a side wall of a reversely-covered tire has too deep indentation and rubber on the side wall part is uneven after inflation. The tire molding drum comprises a main shaft, a locking block assembly and a reversely covering device, wherein the reversely covering device comprises a plurality of reversely covering rods; a reversely covering rolling wheel is arranged at the front end of each reversely covering rod; the same barrel-shaped flexible covering object sleeves the locking block assembly and the plurality of reversely covering rods of the reversely covering device on the corresponding side; the front end of the flexible covering object is fastened on the locking block assembly, and the rear end of the flexible covering object is connected onto the reversely covering device; and when the reversely covering device is reversely covered in place, the front part of the flexible covering object is completely fitted on the side wall of the tire. The flexible covering object is arranged, so that the rubber on the side wall can be prevented from being directly extruded by the reversely covering rolling wheels; and the extruding pressure of the rolling wheels is buffered, so that the extruding force on the side wall by the reversely covering rolling wheels is reduced, the indentation on the reversely-covered side wall of the tire is alleviated, and the quality of the tire is improved.

Description

technical field [0001] The invention belongs to the technical field of rubber machinery, and in particular relates to the structural improvement of a tire building drum used for tire turn-up operations. Background technique [0002] In the rubber tire manufacturing process, the building drum on the tire building machine is mainly used for the turn-up of the tire sidewall rubber. [0003] In the prior art, the forming drum generally includes a hollow cylindrical main shaft with left and right-rotating roller screws inside, and a locking block assembly and a turn-up device are sleeved on the outer circumference of the main shaft. The locking block assembly is used for When turning up the tire, the tire is locked and positioned. The turning-up device is used to turn up the sidewall rubber. At the same time, there are two sets of locking block components and turning-up devices. They are arranged symmetrically with the vertical center line of the main shaft, so as to lock the si...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a tire building drum, which can solve the problem of tire quality in the prior art that there are indentations on the sidewall after the tire is turned up, and the indentation is too deep, and the rubber material on the sidewall part is uneven after inflation.

Images