“Our exquisite group's investment of 1.13 billion yuan and a tire testing ground covering an area of ​​2,000 mu was already started in Yantai Zhaoyuan Binhai New Area in early May. This will end China’s history of not having an outdoor tire testing ground and accelerating the process of independent R&D of domestic tires. On May 26, Director Sun of Shandong Linglong Tire Co., Ltd. Office told reporters with pride.
According to Zhang Hongmin, according to the EU Tire Label Law, starting from November 1, 2012, all automobile tires sold in the European Union must be labeled to indicate the tire's fuel efficiency (ie tire rolling resistance requirements), rolling noise and slippery The level of pavement grip. Of these three indicators, the two indicators of wet grip and noise must pass through the tire testing ground to obtain test data. The world's tire giants Bridgestone, Michelin, Goodyear, etc. have a number of tire test sites. Since China does not have a tire testing ground, domestic companies have to take tire tests abroad to make high-end tires. Some large tire companies in Shandong spend as much as tens of millions of dollars a year on this item.
"Our testing ground will fully absorb the experience of construction of the world's tire power countries such as Europe, the United States, Japan, and South Korea, based on the completeness of the function and the leading edge of technology, equipped with a variety of experimental testing equipment of international advanced level, capable of tires More than 40 performance indicators such as controllability, economy, and comfort have been monitored and tested in the field. Director Sun proudly introduced this to reporters.
“The construction of the experimental field has provided strong support for domestic tire companies in responding to the European Union's tire labeling method, but it still requires the tireless efforts of the tire companies themselves to enter the EU market.†Zhang Hongmin said: “The EU Tire Labeling Act is implemented in two phases. This year will be the first stage, and the second stage will be implemented in 2016. At that time, higher requirements will be put on tire performance."
The reporter learned from the interview that 80% of Shandong tire companies can meet the standard requirements of the first phase of this regulation. These tire companies did not stop the pace of advancement. They are trying to improve product quality through technological research and development and independent innovation. Or ahead of schedule to meet the requirements of the second phase of the regulations.
“We use the advantages of having a national key engineering laboratory to re-revise the current product R&D process and technical standards of the company, add regulatory indicators and innovative technical measures to the R&D process and technical standards, and at the same time revise and upgrade. The company's product testing, inspection and release standards to ensure that the tire products on the market meet the EU labeling and regulations performance indicators." Deputy manager of Triangle Tire Co., Ltd. Wang Bo told reporters.
The rubber raw materials needed for tire production are also accelerating the development process. The synthetic and application team of new rubber and plastic materials led by Professor He Aihua from Qingdao University of Science and Technology has developed the second generation of trans-isoprene rubber, which has more excellent flex fatigue resistance, outstanding wear resistance and low rolling resistance, which can make tires more Fuel economy, longer life, and greater safety. The outstanding performance advantages of trans-isoprene have attracted the attention of many tire companies. According to He Aihua, Shandong Dongying Gree Rubber & Plastic Material Co., Ltd. has signed a patent transfer contract of up to 5 million yuan with the team to promote this new type of technology. Industrial production of materials is currently preparing to build an industrial pilot plant with an annual output of 4,000 tons.
Plastic Injection Molded Connector Accessories
Mechanical properties of injection connector fittings as far as connection functions are concerned, insertion and extraction forces are important mechanical properties. Plug force is divided into insert force and pull out force (pull out force is also called separation force), the requirement of both is different. In the relevant standards, there are provisions for maximum insertion force and minimum separation force, which indicate that, from the point of view of use, the insertion force should be small (hence the structure of LIF with low insertion force and ZIF without insertion force), and if the separation force is too small, it will affect the reliability of contact.
Another important mechanical property is the mechanical life of the connector. Mechanical life is actually a kind of durability index, which is called mechanical operation in GB5095. It is based on a cycle of one insert and one pull, and whether the connector can normally complete its connection function (such as contact resistance) after the specified plug cycle. The plug force and mechanical life of the connector are related to the plating quality (sliding friction coefficient) of the contact part of the contactor structure (positive pressure size) and the dimensional accuracy (alignment) of the contactor.
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