Coal Mining Bit

Shandong Jingyanggang Metal Equipment Co., Ltd(JYG Precision Casting) was founded in 2007 in Yanggu, Shandong, China. Covering an area of 20000 square meters, the factory boasts advanced investment casting and shell mold sand casting producing lines to cater to the different needs of the customers home and abroad.
As a rising star in the industry of precision investment casting, JYG has been dedicated to the production, marketing, and R & D of quality precision casting products since its founding. Investment casting, or lost-wax casting, is one of the oldest metal forming process, dating back thousands of years, in which an expendable mold is made around a wax pattern that is to be burned away before molten metal is poured in. It is a precision casting process used to create metal parts, especially complex, intricate or thin-wall castings from almost any alloy....