Casting weight and size range are very wide, weighs only a few grams of the lightest and heaviest up to 400 tons, the thinnest wall thickness of only 0.5 mm, the thickness may be more than one meter in length by a few millimeters to ten meters quay bollard equipment to meet the requirements of different industrial sectors. Casting quality has a great impact on the performance of mechanical products. For example bollard equipment manufacturers, machine tool castings wear resistance and dimensional stability, a direct impact on the accuracy of the machine to maintain life; accuracy and surface of various types of pump impeller, housing and hydraulic cavity size, profile rough degree, 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 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 for the repair bollard equipment supply, after the repair can be achieved standards and technical conditions of delivery and acceptance casting casting; scrap the appearance of substandard quality and intrinsic 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. Port bollard equipment, bollard equipment, machinery provided by Qingdao Hua Chen Hua Chen Machinery Co., Ltd .. 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!