Engine Cylinder Head Low Pressure Casting Mold – High Precision Sealing and Complex Cavity Defect Optimization
Engine cylinder head molds feature complex deep cavity structures and strict sealing requirements, Xinfeng Mold optimizes flow channel and exhaust to solve thin-wall filling difficulties.
Cylinder head low pressure molds maintain sealing pressure stability at 0.03–0.06 MPa, with parting surface leakage rate controlled at 0% during 72-hour continuous production.
Multi-branch gating system is adopted for cylinder head molds, balancing filling speed of 8 complex cavities and reducing local incomplete filling rate by 70%.
Deep cavity exhaust slots are processed with 0.10 mm ultra-fine gaps, completely discharging deep hole residual gas and reducing cylinder head air hole defects below 0.5%.
Mold steel hardness for cylinder head production is controlled at 44–49 HRC, resisting thermal deformation caused by long-term high-temperature alternating impact.
Zoned independent cooling pipelines cover 92% of the cavity area, controlling overall mold temperature fluctuation within 22°C.
Cylinder head mold trial production requires 25 sample inspections, including 100% air tightness testing for engine assembly requirements.
Mold modification for cylinder head thin-wall areas must be completed within 2 working days to avoid delaying engine part batch production.
Regular exhaust slot cleaning every 1500 cycles prevents aluminum residue blockage and maintains stable filling effect of complex cavities.
Many factories adopt unified cooling parameters, resulting in 28% higher shrinkage rate at cylinder head thick-thin wall transition positions.
Cylinder head mold precision standards are higher than gearbox housing molds, requiring stricter control of deep cavity dimensional tolerance.
Low pressure process is the mainstream for engine cylinder head production, far exceeding gravity process in air tightness and compactness performance.
FAQ
Q1: What is the maximum allowable porosity of cylinder head castings? A1: The internal porosity rate is strictly controlled below 0.5% for air tightness.
Q2: What is the sealing pressure range of cylinder head molds? A2: Stable working sealing pressure is 0.03 MPa to 0.06 MPa.
Q3: How to solve deep cavity incomplete filling of cylinder heads? A3: Adopt multi-branch gating and ultra-fine deep cavity exhaust structure.
Q4: What is the mold steel hardness standard for cylinder head molds? A4: Heat treatment hardness ranges from 44 HRC to 49 HRC.
Q5: How many samples are required for cylinder head mold trial inspection? A5: A minimum of 25 samples for full performance and air tightness testing.
Core Embedded Keywords: Engine Cylinder Head, Low Pressure Casting Mold, Gearbox Housing, Complex Cavity Mold, Mold Sealing Performance, Air Tightness Detection, Casting Porosity, Mold Cooling System, Gravity Casting Process, Precision Mold Processing
