Method for vulcanizing solid tires in tank-type variable-pressure variable-temperature manner

Abstract

The invention discloses a method for vulcanizing solid tires in a tank-type variable-pressure variable-temperature manner. The method comprises the following steps: a high-pressure flashing stage, that is, evacuating air between a tire blank and a mold; a high-pressure low-temperature vulcanizing stage, that is, closing the mold under the pressure of 1082 plus or minus 2T and vulcanizing in a gradually heating mode; a high-pressure high-temperature vulcanizing stage, that is, keeping the mold closing pressure of a vulcanizing tank to be 1082 plus or minus 2T and vulcanizing for 180min by adopting steam at 135 plus or minus 2 DEG C; a low-pressure high-temperature vulcanizing stage, that is, relieving the mold closing pressure of the vulcanizing tank until 260 plus or minus 2T, and vulcanizing with steam at 135 plus or minus 2 DEG C until the optimum vulcanizing is finished; a low-pressure low-temperature tank-sealing stage, that is, keeping the mold closing pressure of the vulcanizing tank to be 260 plus or minus 2T without steam introduction, and sealing the tank for 60min and finishing the vulcanizing operation; taking out the tire after the pressure in the tank is zero. The method can effectively solve the quality problem of cracks of the vulcanized tire and has significances in improving safety and service life of the vulcanizing equipment and saving energy.

Description

technical field [0001] The invention belongs to the field of polymer rubber tire processing, and in particular relates to a vulcanization method of a solid tire, in particular to a tank type variable pressure and temperature vulcanization method of a solid tire. technical background [0002] Solid tire carcass is wide and thick, widely used in construction machinery. Most of the existing solid tires are vulcanized by a vulcanizer or a vulcanization tank. The vulcanization process is to place the solid tire in a mold with a runner and then use a vulcanizer or a vulcanization tank for constant pressure and temperature vulcanization, that is, during the vulcanization process The pressure and temperature of vulcanization are always kept constant. The main problems of this constant pressure and constant temperature vulcanization method are: first, due to the wide and thick solid tire carcass, the rubber raw material on the inner wall of the mold, that is, the rubber raw material...

AI Technical Summary

Problems solved by technology

[0003] According to the current situation of constant pressure and constant temperature vulcanization of solid tires, the present invention provides a method of vulcanization of solid tires with variable pressure and temperature. Quality problems, can improve the safety and service life of vulcanization equipment, and save energy