Hardware mold investment in full swing
China is a big producer of molds. With the continuous development of metal mold technology, China's precision plastic molds have been able to produce cameras, mobile plastic parts molds, multi-cavity small modulus gear molds, etc.; large precision complex die casting molds can produce automatic Escalator integral pedal die casting mold, automobile rear axle gear box die casting mold and casting mold of automobile engine shell. However, on the whole, China is not far from a powerful mold country, the product is still mainly in the middle and low, many high-grade precision, complex molds are still dependent on imports.
However, on this basis, scientific research funding has been severely deficient and the research strength is weak. There is no public technical support system conducive to innovation. To close the gap, we must increase research and development, based on innovation, improve the quality of the industry's economic operation. At present, China's mold industry is entering an important period of development. The development of the manufacturing industry, especially the automobile manufacturing industry, has driven the expansion of the domestic mold market. The number of foreign users purchasing molds in China has continuously increased, and the international mold manufacturing industry has gradually shifted to China. The China Die and Mould Industry Association predicts that the domestic and international mold market will continue to improve this year, and the annual growth rate of China's mold industry will still maintain about 20%.
In 2013, the government continued to take steady growth, so as to drive investment to accelerate growth again. According to the forecast of China Investment Association, the investment in 2013 will exceed 45 trillion yuan.
In recent years, the investment and construction of the domestic mold industry is in full swing. As an economic phenomenon, people have drawn more and more attention and attention. Mold industry agglomeration is of great strategic importance to optimize the industrial structure, promote industrial upgrading, change the mode of economic growth, raise the level of economic development, enhance regional economic competitiveness, and enrich the people.
It is reported that compared with the 50 cases in the mold industry investment in 2011, the investment in the mold industry in both the first half of 2012 witnessed a rapid increase in both quantity and scale. The top ten investment thresholds for investment rose to 10 billion, and the top 10 investment funds in the second half of the year. All of them were over 2.5 billion. The survey data showed signs of slowing down in the second half of the year. However, the top 100 investment cases in 2012 were all 100 million. The overall growth rate compared to 2011 was significant. In comparison with the 2012 model investment of Jinmo.com, and the 50 investment in the mold industry in 2011, the 2012 growth rate doubled year-on-year to reach 3,863 trillion yuan. This data does not include the equipment investment portion of the existing 50,000 small and medium-sized mold makers.
If China invests more than 45 trillion yuan by the end of 2013, the investment in the mold industry will account for about 1%. With the 1:100 driving effect, the investment in the mold industry will reach 450 billion yuan. This investment growth rate is only 16% can be achieved.
Roller bearing, one of the two members of the class of rolling, or so-called antifriction, bearings (the other member of the class is the Ball Bearing). Like a ball bearing, a roller bearing has two grooved tracks, or races, but the balls are replaced by rollers. The rollers may be cylinders or truncated cones. Only radial loads (i.e., loads perpendicular to the axis of rotation) can be carried when the rollers are cylindrical, but with conical rollers both radial and thrust, or axial, loads (i.e., ones parallel to the axis of rotation) can be carried. A needle bearing has cylindrical rollers that are relatively slender and completely fill the space between the races; in many cases the inner race is dispensed with. Because there is line contact between a roller and the races, while in a ball bearing there is point contact, in a given space a roller bearing can carry a greater radial load than a ball bearing.
Roller bearings are used in all main shaft and auxiliary drive shaft applications to support pure radial load, and allow for axial shaft elongation due to temperature changes with no additional load effect on the bearing. They are usually located at the ends of the turbine and compressor shafts and are often mounted in a housing, but separated from it by a layer of pressurized oil known as a squeeze film damper.
In many cases, instead of having a separate inner race for roller bearings, the [inner race" is an integral part of the shaft or stub shaft. This reduces complexity, weight, and build-up of concentricity tolerances. Overall, this is غير مجاز مي باشدt effective, but the غير مجاز مي باشدt of replacement or repair is likely to be higher than for separate inner races.
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