Casting historic application. Ancient people used to make castings and some life appliances. In modern times, mainly used for rough casting machine parts, precision castings, and some can also be used directly as machine parts. Casting account for a large proportion of mechanical products, such as tractors, the casting weight accounts for the whole weight of 50 to 70% of the port cable trough prices, agricultural machinery accounted for 40 to 70% of ports cable slot machine, engine, etc. 70 to 90%. All kinds of castings, casting machinery most varieties port cable channel device, the shape of the most complex, the amount is also the largest, accounting for about 60% of total production of castings. Followed by the ingot mold and metallurgical engineering pipeline, as well as some of the tools of life. Casting is also closely related to daily life. For example, often use the door handles, locks, radiators, down the water pipes, pots, gas hob, iron, etc., are casting. 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. Cable channel ports, port cable ducts, Chen Hua machinery provided by China Machinery Co., Ltd. Qingdao Chen. 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!