Dongguan Chengda Machinery Parts Co., Ltd. is located in Dongguan City in the industrially developed Pearl River Delta. We are a modern technology enterprise integrating R&D, production, sales, internal & external cylindrical grinding, vacuum heat treatment, vacuum nitriding and maintenance services all year round.
We have an experienced technical team engaged in die casting parts processing as well as a professional sales team, equipped with high-precision production equipment including CNC lathes, automatic lathes, milling machines, internal & external cylindrical grinders, vertical honing machines, wire EDM, boring machines, gantry milling machines, vacuum heat treatment furnaces, vacuum nitriding furnaces, quenching furnaces and other devices. Our upgraded production capacity enables us to fulfill all customer production tasks efficiently with guaranteed product quality and on-time delivery.

Production & Sales Scope: Die Casting Machine Spare Parts compatible with LK, Haitian, Yizumi, Frech, Buhler, Ube, Toshiba, Toyo, Ryosho, Tenzo, Kogyo, Chenfeng, Weitai, Xinhong, Zhengao, Baoyang and other brands.
• 125T-16000T Cold-Chamber Aluminum & Magnesium Alloy Die Casting Machines: Shot sleeves, plunger tips, injection rods, connecting joints, release agents;
• 15T-650T Hot-Chamber Zinc & Magnesium Alloy Die Casting Machines: Goosenecks, nozzle bodies, nozzle tips, piston rings, injection plungers, heating sleeves, heating rings, temperature probes;
• Mold Accessories: Ejector pins, ejector pin sleeves, etc.

Our company has established a complete and scientific quality management system. We have been widely recognized by the industry for our integrity, overall strength and stable product quality. Friends from all walks of life are welcome to visit us for factory tours, technical guidance and business discussions.

  http://www.dgcdwj.com/

1. Material: ESR remelted H13 steel or SKD61 hot work die steel.
2. Deep hole internal cylindrical grinding is adopted for inner bore machining. The entire inner bore is finished in one stroke without tool withdrawal marks, achieving surface roughness Ra ≥ 0.8μm. Mandrel grinding is applied for outer circle processing; the roundness, coaxiality, perpendicularity and other geometric tolerances of the inner bore fully meet drawing requirements 100%.
3. Heat treatment: Vacuum high-temperature quenching at 1030°C ~ 1050°C, followed by three cycles of high-temperature tempering to reach hardness HRC 42 ~ 46. Surface treatment: Glow ion nitriding with nitriding layer thickness 0.25 ~ 0.30mm, surface hardness HV 900 ~ 1050 (equivalent to HRC 62 ~ 65). It boasts high base hardness and high surface hardness to avoid inner bore scratching, as well as excellent heat resistance, thermal fatigue resistance and molten metal erosion resistance.