The 3C certification of the hottest Jinhu tire has

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The 3C certification of Jinhu tire has been revoked, and there is a blank in the domestic recall system.

after CCTV exposed that Jinhu tire company used a large number of "retooling" events, the "hidden rules" of the "retooling" industry also surfaced. Whether the re compounding rubber designed and manufactured by the hydraulic universal testing machine according to the specifications enters the tire refining process in line with the industry regulations? Why does Jinhu tire have so many refinishes? What are the loopholes in the company's process management? First finance and economics made a corresponding investigation

Mr. Wu, who served as the regional sales director of a multinational tire company, introduced that the initial process of tires includes "internal mixing" and pressing, that is, mixing raw materials such as carbon black, natural rubber, oil and additives, processing and pressing in an internal mixer to produce "rubber". "The so-called retooled rubber is some films that do not meet the requirements in some indicators, and there may be quality problems. Every tire company does use retooled rubber, but the proportion with the original film rubber is usually not higher than 1:5."

a senior executive of Zhongce Rubber explained to him that using 3D printing technology can effectively reduce the cost, and the saying of "retooling" in the tire industry is also different. The internal mixing process of its enterprise is divided into qualified rubber and unqualified rubber. Unqualified products will be sold to waste purchase stations or other business units at a low price, and will not be returned

Mr. Wu said that according to the CCTV report, the blending ratio of the returned rubber and the original rubber of Jinhu tires has reached 1:1, which is obviously contrary to the Convention. Excessive returned rubber will cause many problems, "which will cause poor tire quality. Moreover, it is likely to be difficult to find out when the tire enterprises deliver to the automobile manufacturers." He pointed out that the delivery inspection of tires is mainly determined from the appearance, such as whether the bulge, bump, balance, and whether the tire contour meets the standard, etc. And the promotion of the establishment of China green manufacturing alliance with the return of rubber products, a series of problems, such as air tightness and firmness, need users to see after thousands of kilometers of vehicles

even automobile manufacturers cannot conduct a comprehensive test on the original tires of each batch. They can only identify Jinhu tires of a certain category as a supporting device before the launch of new vehicles, test such products, and conduct relevant spot checks in the future

the above-mentioned senior management of Zhongce Rubber said, I don't know why Jinhu tire has such a huge amount of retooled rubber? "Generally speaking, the unqualified returned rubber only accounts for a few percent of the rubber after internal mixing."

Mr. Wu, who is familiar with the process flow, said that under normal circumstances, tire enterprises will not purchase retooled rubber from other companies. One possibility is that Jinhu tire has saved the retooled rubber for several months, and uses the retooled rubber mixing process at one time in a certain period of time. Another possibility is that due to the problems of raw materials and production process, the total amount of "retooled rubber" is large. If all of them are treated as waste products, there is likely to be a very high waste rate. Due to the high scrap rate, the company's executives will enter the production process with a large number of "returned rubber", so that their performance will not be affected

Mr. Wu also said that if Jinhu tires use a large number of cheap "retooled rubber" mixing processes, it may also be related to automobile manufacturers' continuous suppression of tire enterprises' quotations. According to his understanding, among all multinational tire enterprises, Jinhu's quotation for the original tires of major cars is far lower than that of Michelin and Bridgestone, and also lower than that of Korean Hantai tires, which sell well. In this case, it is also logical to save costs by mixing "retooled rubber". The above-mentioned senior management of Zhongce said that if it is unqualified, most of the returned rubber is expensive. It is sold to a third party and used to manufacture rubber runways, and the price is about 1000 yuan/ton, but if it is qualified, the price is more than 5 times that of waste products

Jinhu tire tracking II: is the addition proportion based on quantity or weight

after the 315 party exposed the illegal operation standards of Jinhu tire Tianjin factory and the problem of a large number of mixing of returned rubber, on March 16, Jinhu tire made a public statement, saying that "the addition ratio of raw rubber and returned rubber is calculated according to the weight, not an intuitive quantitative proportion". Is this really the case? Take a look at the CCTV survey

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