Density Of Medium Density Fiberboard (mdf) And Its Online Prosecution

Produce in Medium Density Fiberboard of our country has developed very fast. Calucated by large-middle model Medium Density Fiberboard in 95梡lan and 2010梡lan production capacity of Medium Density Fiberboard of our country will have 4.5 million m3/year by the end of 2010. But the quality of product, the cost of production, economic benefit of enterprise in Medium Density Fiberboard of our country lie some questions. It is dependent on import, imports foreign technology and equipment repeatly. Have no organized skilled personnel to digust and observe imports foreign technology and equipment. The other hand automatic control and examine of china-made equipment is poor. All of those hinder the development of Medium Density Fiberboard of our country. Solving the contradictary of produce scale and produce quality is due to the scientific and technical workers in forestry factory.In the paper, applied achievement and achievement in theory of automatic control and examine automatic control and examine in produce line of Medium Density Fiberboard were analysed and summared and a specialized discuss was gived. Density is a critical process parameter during the Medium Density Fiberboard. The physics and mechanics function of the product is detemined by the feather. And the density is not a sole factor, it relates the control of the mat of the moisture, the control of forming process, the control of the hot pressing curue. So the controll of density is the core of produce line the Medium Density Fiberboard. The paper devides two parts: average density and vertical density, and introdunces the characteristic of each other, the factor of influence and the control to each factor. Their characteristics according to different kinds of mechanical installation were Dicussed such as the characteristic of control technology in forming line, distinguishing them as multi - daylight press single opening flat hot - press, jingle - daylight press. At last, the technology of non - destructive test to product was introduced. It is can be forecasted that the automatic control and examine will make better on the line of the whole produce.During the analysing and discussing, some views were provded and some concrete conditons from the principle were analysed such as only devise the principle pictures on programming. Pay attention to using the compute language to describe technological process. The situation is different on the produce line. The examination of process parameter and the controll principle of location - time hot pressing curve were Analysed. The working principle of the jingle-daylight press was provided and the working main program and some sub program were devised. Single opening flat hot-press cannot be made in our country, so only analysing the working principle and summarizing the controll to density parameter. It is difficult to producing product of high quality and low consumption during the technical innovation in enterprise of Medium Density Fiberboard. So it is critical to develop producing mechanical instauations according to the condition of our country.The backward condition in technique of wood base pannel of our country is not solved only by blind importing foreign technology and equipment.