Tread pattern groove adhesive tape filling vulcanization process for retreading tire

Abstract

The invention discloses a tread pattern groove adhesive tape filling vulcanization process for retreading a tire, which comprises the following steps of: (1) selecting an unvulcanized standby adhesive tape according to the volume of a tread pattern groove; coating silicon oil on the inner wall of the tread pattern groove; squeezing the standby adhesive tape into the groove; mounting a packaging sleeve, pumping vacuum and vulcanizing in a tank; after the tire is vulcanized, taking out the pattern adhesive tape; (2) suspending the pattern adhesive tape on a rack and sticking a label in the suspending position; (3) selecting the pattern adhesive tape according to the model and specification of a tread pattern; filling the pattern adhesive tape into the tread pattern groove; fixing the pattern adhesive tape in the tread pattern groove; (4) mounting the packaging sleeve, pumping vacuum and vulcanizing in a tank. The invention adopts the pattern adhesive tape which can be recycled in the tread groove, has long service life, vulcanization temperature and pressure resistance, certain elasticity and plasticity, convenient operation, easy acquisition and low cost and can exactly fill the groove, not only can reduce the production cost and improve the bonding quality of the tread, but also can improve the appearance and the abrasion resistant quality of the tire.

Description

technical field [0001] The invention relates to a tire retreading process, in particular to a retreading vulcanization process of a pre-vulcanized tread method. Background technique [0002] In the prior art, the tire retreading vulcanization process of the pre-cured tread method mostly adopts the tank vulcanization method: an outer envelope is installed on the outside of the tire, an inner tube or an inner envelope is installed inside the tire, and the air is exhausted from the contact interface between the envelope and the tire surface, basically to Vacuum state, then put into tank and vulcanize under proper air pressure (about 0.6Mpa) and temperature (110℃~120℃). [0003] The envelope is a process consumable, which is made by professional manufacturers using expensive butyl rubber materials. Butyl rubber has poor elasticity, and has a large permanent deformation after being stretched in a hot state, and has the weakness of poor recovery after deformation. In the current ...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technology mainly has the following disadvantages: 1. The above-mentioned technology cannot increase the number of times of use of the outer envelope, because the method of filling the envelope with 0.3-0.4Mpa of compressed air in the vulcanized state cannot make the envelope wall sink into the tread at all. The part of the pattern groove is temporarily restored to its original shape, and the degree of depression cannot even be reduced, so it cannot increase the number of times the envelope is used. At present, the number of vulcanization times of the outer envelope for retreaded tires is less than 200; 2. The degree of vulcanization of the entire tread adhesive Unevenness affects the bonding quality of the tread. Because the glue at the tread groove is very thin (only 1 / 3 to 1 / 4 of the thickness of the tread), the hot air in the tank is transmitted to the adhesive glue on the lower part during vulcanization. The heat rate is fast, so when all the adhesive glue is vulcanized, the adhesive glue in the lower part of the tread groove will be overvulcanized; 3. It is not conducive to the appearance and wear resistance of the tire, because the envelope is in a vacuum state When the vulcanization occurs, the vicinity of the depression is elongated to increase its elastic tension, thus increasing the compressive force and bending moment in the width direction of the tread, so the straight or wavy tread in the vulcanized state is prone to tread deformation. The phenomenon that the pattern groove is squeezed and narrowed and warped and deformed reduces the qualified rate of finished tires. The warped tread not only affects the appearance of the tire, but also has extremely poor wear resistance