we adhere to "fully handcrafted processes + one-on-one technical consultation" to customize high-precision, long-life automotive engine die casting molds for new energy vehicles, traditional car manufacturers, and parts suppliers. From drawing optimization to mold delivery, we reject AI automation gimmicks—every process is overseen by technicians with over 10 years of experience, ensuring molds perfectly fit customer production needs and enable efficient output of qualified die castings.
Tailored to Your Production Scenario
Diverse Compatibility: Customizable for gasoline/diesel engine blocks, cylinder heads, transmission housings, etc. Compatible with aluminum alloy, magnesium alloy, and various die casting machines (800T–4000T).
In-Depth Process Communication: Our technical team visits customers to align with their specific requirements: raw material dimensions, surface precision (Ra≤1.6μm), annual output (50,000–500,000 pieces), etc. We manually draft 2D/3D drawings to optimize runner systems, cooling channels, and demolding structures, reducing trial mold times.
Premium Materials for Exceptional Durability
Superior Mold Steel: Using imported H13 (SKD61) hot work die steel (hardness HRC48–52), triple-tempered to enhance thermal fatigue resistance by 30%. Normal service life ≥80,000 mold cycles.
Fully Hand-Processed Finishing: Cavities are hand-polished by senior technicians (Ra≤0.8μm), parting surfaces ground to an error ≤0.02mm, and mating surfaces manually adjusted to ensure tight clamping without flash.
Artisanal Control of Traditional Processes
Precision Machining: Cutting accuracy ±0.005mm, complex curves formed in one pass.
Manual Aging Treatment: Mold blanks undergo 650℃ annealing + 200℃ tempering, followed by 30 days of natural aging. Technicians regularly monitor deformation to eliminate internal stress and reduce cracking risks during mass production.
Requirement Analysis
Engineers conduct on-site surveys to record customer press parameters, historical casting defects, automation levels, etc., forming a tailored process plan.
Drawing Optimization
Manual annotation of critical mold dimensions (e.g., draft angle 3°–5°, fillet R5–R8mm), ejector pin layout (spacing ≤50mm), and cooling channel routes (φ8mm spiral holes).
Manufacturing
Rough Machining: Gantry milling to remove excess material, leaving 2mm allowance.
Precision Machining: 5-axis CNC machining center (accuracy ±0.01mm) for cavity milling; EDM for complex structures.
Handcrafted Processes: Fitters manually grind parting surfaces; quality inspectors perform 100% dimensional checks using height gauges and dial indicators.
Trial Mold & Debugging
Trial molds on in-plant die casting machines. Technicians adjust ejector stroke and cooling time on-site until burrs ≤0.1mm and porosity <1%. Provide 3 qualified samples for customer inspection.
Three-Layer Quality Inspection System:
First Piece Full Inspection: Conduct a comprehensive inspection of dimensions, surface roughness, and geometric tolerances (flatness ≤ 0.03mm).
Process Sampling Inspection: Technical supervisors review critical dimensions every 10 hours of machining.
Mandatory Trial Mold Inspection: Provide third-party test reports (including material composition, hardness, and flaw detection results).
Address
No. 212, Gaodian, Xinxin Village, Langxia Street, Yuyao City, Zhejiang Province, China
Tel
If you have any enquiry about quotation or cooperation, please feel free to email us at sale@nbhtmetal.com or use the following inquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
