The working characteristics of the screw mold first use the lead mold to classify the screw head types: 1. Lead mold 2. Screw thread rolling plate screws; The material selection of the leading die is very important. The service life mainly depends on the quality of the tungsten steel inside. The use of authentic Chunbao tungsten steel can effectively ensure the service life. The wire rolling plate should have high hardness, wear resistance, sufficient strength, certain impact force and strong fatigue resistance. The hardness of the working part is 59 ~2hrc. If >62hrc, the tooth is easy to collapse and <59hrc is easy to wear; Quenched martensite <3 grade; The working surface shall be free of decarburization and low hardness; The surface of the thread take-up plate shall be free of cracks, nicks, rust, grinding burns and other defects that affect the service performance.

Screw mold process flow:
Process flow: preheating -- Heating -- cooling -- cleaning -- tempering -- hardness inspection -- blackening -- appearance inspection.

Working characteristics of screw mould
The screw mould first uses the leading mould to punch out the head shape of the screw, and then the thread is rubbed out by the thread rolling plate, that is, the tooth plate!

Hebei Zhongtian Cemented Carbide Co., Ltd. en.hebzhongtian.cn  was established in 1988. Over years of honest management, vigorous exploration and continuous growth, Hebei Zhongtian Cemented Carbide Co., Ltd. was formally established in 2021. The company has passed ISO9001 quality management system certification. The company covers a land area of over 10,000m2, has over 50 employees, over 20 low speed wire cut machines, machining centers, lathe-mill combined machines, fine grinders, polishers and other domestic and overseas advanced equipment, and the Detection Department has three-coordinate measuring instruments and automatic image measuring instruments. We make every effort to produce each product to satisfy customers. 

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