WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere. WUXI ZOZEN BOILERS CO.,LTD. , https://www.cnzozen.com
In recent years, with the rapid development of China's mold industry, standardization, specialization, and commercialization of mold parts have reached a high level and have made great progress. Since the establishment of the National Mold Standardization Technical Committee in 1983, it has organized experts to formulate, revise, and review mold standards. A total of more than 90 standards have been issued, including 22 standard stamping standards and more than 20 plastic mold standards. The issuance and implementation of these standards have promoted the technological progress and development of the mold industry, resulting in great social and economic benefits. The research, development and production of modular standard parts are in full swing, regardless of product types, varieties, specifications, or the technical performance and quality levels of the products.
At present, the level of standardization and application of molds in China is still relatively low, with an optimistic estimate of less than 30%, and there is still a large gap compared with foreign industrial developed countries (70-80%). Although production and sales companies are increasing year by year, most of them are small-scale, outdated equipment, backward technology, high cost, and low efficiency. Only ordinary small and medium standard punch die sets and plastic die sets, guide posts, guide bushes, push rods, mold springs, pneumatic components and other products are highly commercialized and can basically meet the needs of the domestic market, and some of them are exported. And those with high technical content, advanced structure, excellent performance, high quality, and convenient replacement have personalized products, such as ball lock type quick change punch and fixing plate, solid lubrication guide plate and guide sleeve, wedge mechanism and its components There are very few domestic manufacturers of high-grade plastic mold standard parts and nitrogen main springs. Due to the lack of funds, technical reform projects are difficult to implement, production efficiency is low, and the delivery period is long. The contradiction between supply and demand is increasingly prominent.
Therefore, a considerable amount of mold standard parts must be imported from abroad every year, and its cost accounts for about 3-8% of the annual mold import amount. There are still many problems in terms of technical standards, scientific and technological development, and product quality for domestic standard mold parts. For example, product standards are confusing, with few functional components and low technical content, poor applicability; small technological changes, obsolete equipment, backward technology, low level of specialization, and unstable product quality; shortage of professionals, poor management, and low production efficiency , Long lead times; uneven distribution of production and sales outlets, operating specifications and less variety, lack of supply; some units in order to compete for market, do not talk about quality, shoddy, shoddy goods flood the market. There is also the need to seriously study and urgently resolve the phenomenon of cost-cutting, blind price cuts, and disruption of the market. As a whole, the development prospects of China's mold standard parts industry are very optimistic. The standard parts industry has become the sunshine industry of today, and it is striding towards the big world.