Dongguan Chengda Machinery Parts Co., Ltd. is situated in Dongguan City within the industrially developed Pearl River Delta Region. We are a modern technical enterprise integrating research & development, production, sales, internal & external cylindrical grinding, vacuum heat treatment, vacuum nitriding and maintenance services over the years.
Our company boasts an experienced technical team specializing in die casting parts processing as well as a professional sales team. We are equipped with high-precision manufacturing equipment including CNC lathes, automatic lathes, milling machines, internal & external cylindrical grinders, vertical honing machines, wire electrical discharge machines, boring machines, gantry milling machines, vacuum heat treatment furnaces, vacuum nitriding furnaces, quenching furnaces and more. Advanced equipment greatly enhances our production capacity, allowing us to complete all customized orders for customers efficiently, with guaranteed product quality and punctual delivery schedules.

Production & Sales Range: 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 mainstream brands.
• For 125T-16000T Cold-Chamber Aluminum & Magnesium Alloy Die Casting Machines: Shot sleeves, plunger tips, injection rods, connecting joints, release agents;
• For 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 enterprise has established a complete and scientific quality management system. We have gained widespread recognition throughout the industry for our integrity, comprehensive strength and reliable product quality. Customers from all sectors are warmly welcomed to visit our factory for inspection, technical guidance and business negotiations.

  http://www.dgcdwj.com/

1. Raw Material: Fushun ESR H13 steel, or SKD61, 8407 hot work die steel.
2. Deep hole internal cylindrical grinding is adopted for inner bore processing. The inner bore is finished in one continuous pass without tool joint marks, achieving surface roughness above Ra 0.8μm. Mandrel positioning is applied for outer cylindrical grinding. The roundness, coaxiality, perpendicularity and all other dimensional tolerances of the inner bore fully meet drawing requirements 100%.
3. Heat treatment process: Vacuum high-temperature quenching at 1030°C~1050°C, followed by three cycles of high-temperature tempering to reach hardness HRC 48~50. Surface treatment: Glow discharge ion nitriding with nitriding layer thickness ranging from 0.30mm to 0.50mm, surface hardness HV 900~1050 (equivalent to HRC 62~65). It features high substrate hardness and high surface hardness to prevent inner bore scratching, alongside excellent heat resistance, thermal fatigue resistance and molten metal erosion resistance.