Method for repairing formed tire blank to improve UFDB performance of tire

Abstract

The invention relates to a method for improving UFDB performance of a tire by repairing a formed tire blank. The method comprises the following steps: S1, detecting the tire blank before vulcanization; step S2, repairing the unqualified tire blank: if the RFV detection is unqualified, finding out a high point RH1 at a tire detection dotting concentration position, and laminating rubber sheets on tire shoulders at two sides of a 180-degree position corresponding to the high point RH1 for repairing; if the COV detection is not qualified, judging the overall deviation compensation direction of the tire, and attaching a circle of rubber sheet to the circumferential side wing position of the single side of the tire blank for repairing; if the STATIC detection is not qualified, a light station point at a tire detection dotting concentration position is found out, and rubber sheets are attached to tire shoulders on the two sides of the light station point for repairing; and S3, detecting and confirming the repair effect. According to the tire blank repairing scheme, the effect is better than the finished tire polishing and repairing effect, the detection value capable of being improved is larger, the appearance of the tire is not abnormal after the repaired tire blank is vulcanized, and the strength, the high speed and the durability of the tire are not affected.

Description

technical field [0001] The invention belongs to the technical field of tire production, and in particular relates to a method for repairing a formed tire to improve the UFDB performance of a tire. Background technique [0002] The UFDB performance of the tire refers to the uniformity and dynamic balance of the tire. The uniformity test items include RFV radial force, LFV lateral force, CON taper, RRO radial runout and BPS side inequality. The dynamic balance test items include UP / LOW Up / down unbalance, STATIC static balance and COUPLE balance performance, tire UFDB performance is not good, it will affect the driving experience (jitter and tire noise, etc.) and abnormal tire wear when using the real car. [0003] With the development of the tire market and the advancement of testing technology, the UFDB performance of tires at this stage is basically an indicator of 100% testing in the tire manufacturing industry. After the tire is vulcanized, the appearance and UFDB perform...

AI Technical Summary

Problems solved by technology

[0005] The above is the repair plan for the unqualified tires of the finished product inspection. This repair plan has the following defects: (1) The depth of grinding during grinding and repairing is generally within 0.5mm. 2) Grinding to a depth of 0.5mm, the repair scope of the inspection items is limited, some unqualified tires are still unqualified after repair, RFV generally requires within 50N (mechanical properties, unit N), CON is generally within 30N, STATIC is generally within 15g ( Weight, in g); (3) The appearance design of some tires is not suitable for grinding and repairing, and the appearance of the tire is unqualified after grinding

If the detected items exceed the standard value and are within the range, inspection, grinding and repair will be arranged after normal vulcanization. If the detected items exceed the standard value too much, the remaining embryos will be dismantled and discarded, resulting in economic losses

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