Casting weight and size range are very wide, weighs only a few grams of the lightest dock trash rack, the heaviest equipment can reach 400 tons of trash rack, wall thickness of the thinnest of only 0.5 mm, the thickness may be more than one meter, length may be a few millimeters to ten meters, can meet the requirements of different industrial sectors. Casting quality has a great impact on the performance of mechanical products. For example, the machine tool castings wear resistance and dimensional stability trash rack products, directly affects the accuracy of the machine to maintain life; all kinds of pump impeller, housing and hydraulic cavity size, profile accuracy and surface roughness trash rack, directly affect the efficiency of the pump and the hydraulic system, the development of energy consumption and cavitation, and so on; the strength of the internal combustion engine block, cylinder head, cylinder, piston rings, exhaust pipes and other castings and resistance to spalling resistance, direct impact on the working life of the engine. Casting quality test results are usually divided into three categories: quality products, rework, scrap. Qualified product quality and the appearance of the intrinsic quality meets the standards or technical conditions of delivery and acceptance of casting; rework the appearance of quality and inherent quality does not fully comply with the standards and acceptance criteria, but allows repair after repair and castings up to standard delivery acceptance of technical conditions require casting; scrap the appearance of substandard quality and internal quality are still not up to standard and technical conditions of delivery and acceptance of casting casting allowed to repair or rework later. Waste and scrap again divided into two kinds of foreign waste. Waste means within the factory or in the casting foundry castings found in waste; waste refers to the outer casting scrap discovered after delivery, they have caused economic losses than in the big waste. Trash rack manufacturers | trash rack | Chen Hua Chen machinery provided by the China Machinery Equipment Co., Ltd. Qingdao. Qingdao Hua Chen Machinery Co., Ltd. (www.qdchenhua.com) strong, credible, in Qingdao, Shandong CNC machine tool industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chen Hua machinery and you hand into the brilliant, for a better future!