Review the development of domestic hardware tool manufacturing industry
Dichloromethane (DCM) is a multifunctional and powerful chloride solvent known for its high solubility. As a solvent, it is often used for coating removal, metal cleaning and polishing; It can also be used as a processing solvent in the production of drugs, polycarbonate, cellulose ester and photographic film, and as an extraction medium for aerosol propellant and food processing. Other uses include adhesives, cosmetics, plastic processing and foaming. Dichloromethane has many characteristics such as super solubility, low flammability, high cost efficiency, recyclability and rapid evaporation. Therefore, it has long been the preferred solvent for a variety of applications, mainly in polyurethane foam blowing, metal cleaner, adhesive, paint stripper and pharmaceuticals. Methylene Chloride, Dichloromethane,Methylene Chloride Dichloromethane DCM HENAN JINHE INDUSTRY CO.,LTD , https://www.hnchromiumoxidegreen.com
Among the tools used in the domestic hardware manufacturing industry, the proportion of cemented carbide tools has reached more than 50%, and the problem of disconnection between the supply and demand structure has become very serious. As a result, a large number of high-speed steel cutters that are surplus are exported at a low price or sold domestically. At the same time, high-efficiency carbide cutting tools have to rely on large amounts of imports. The import volume has increased from 0.9 billion US dollars in 2001 to 450 million US dollars in 2005. 3.6 billion yuan).
In developed countries, cemented carbide tools currently occupy the leading position of tools, with a proportion of 70%. High-speed steel cutting tools are being reduced by 1% to 2% per year, and the current proportion has fallen below 30%. The proportion of super hard tools such as diamond and cubic boron nitride is about 3%.
China's current annual sales of tools are 14.5 billion yuan, of which the proportion of cemented carbide tools is less than 25%, which is not only far from the structure of international market tool products, but also can not meet the growing demand for carbide cutting tools in the domestic manufacturing industry.
China currently produces about 80,000 tons of high-speed steel annually, accounting for about 40% of the world's total production, and consumes a large amount of valuable rare resources such as tungsten and molybdenum. This kind of blind expansion and low-level repetition has resulted in a large surplus of high-speed steel cutters and has to be sold at low prices, which has resulted in a large number of tool-manufacturing companies having low profitability.
Under such circumstances, China's independent research and development of CNC tool grinding machines is particularly urgent, and now Peking Machine Tool has produced a five-axis CNC tool grinder, which has the advantages of high precision, accurate positioning, wear resistance, low vibration, to meet the tool Manufacturing requirements are welcomed by the majority of customers as soon as the market is launched.
Dichloromethane is a widely used organic solvent, which is slightly soluble in water, easily soluble in ether and ethanol, and volatile at room temperature. It can cause poisoning if used carelessly. Many commonly used reagents contain dichloromethane, such as various paints, coatings, furniture polish and cleaner, hair styling agent, household air cleaner, deodorant, leather shoe polish and cleaner, etc.