In modern die casting mold development, DFM (Design for Manufacturability) review plays a critical role in ensuring product quality, reducing production risks, and improving overall manufacturing efficiency. As a professional die casting mold manufacturer, Raidy Mold leverages advanced mold flow simulation, engineering experience, and data-driven decision-making to deliver high-performance mold solutions.
This case study focuses on the oil pan die casting mold feeding system optimization, demonstrating Raidy’s strong capabilities in mold design, flow analysis, defect prevention, and cost control through a systematic comparison of two gating solutions.
In this case, following a comprehensive assessment of the client’s actual production conditions, we ultimately selected Solution 1 (single-side gating). This decision was reached by taking into account the client’s operational practices, existing process parameters, and available auxiliary equipment. Rather than adopting a generic, “one-size-fits-all” approach, Raidy’s engineering team tailored the gate design specifically to the client’s manufacturing environment to ensure an optimal fit.
This final decision not only guarantees excellent compatibility and stable production performance but also effectively enhances product quality. Furthermore, it serves as a clear validation of the principle that, for different products, the appropriate gating solution should be selected flexibly based on specific structural design requirements and actual production conditions.
1. Project Background: Challenges in Oil Pan Mold Design
Oil pans are critical automotive components that require high structural integrity, excellent sealing performance, and minimal internal defects. In die casting, the gating system design directly impacts metal flow behavior, porosity formation, shrinkage defects, and overall product quality.
During the DFM review phase, two feeding system solutions were proposed:
- Option 1: Single-side gating
- Filter located at the water end
- Option 2: Double-side gating
- Filter located on the side
Each design presents different characteristics in terms of flow path, filling balance, and venting efficiency, requiring detailed evaluation through simulation and engineering analysis.
2. Mold Flow Analysis Comparison
Raidy’s engineering team conducted comprehensive mold flow simulations to evaluate filling behavior, temperature distribution, and air entrapment risks for both options.
2.1 Flow Behavior Analysis
Simulation results show clear differences:
- Option 2 (Double-side gating)
- Molten aluminum flows from both sides and meets in the middle
- Strong flow collision occurs in the central region
- Higher turbulence increases air entrapment risk
- Critical areas such as the top ring and horn-shaped section show significant gas entrapment risk
- Option 1 (Single-side gating)
- Metal flows in a single, continuous direction
- More stable and controlled filling process
- Reduced turbulence and fewer flow intersections
- Improved overall flow consistency
Conclusion: Option 1 provides superior flow stability and reduced defect risk.
2.2 Temperature Distribution Analysis
Simulation data indicates:
- Option 1: Approximately 600°C
- Option 2: Approximately 630°C
Higher temperatures can improve fluidity but also increase oxidation, mold thermal stress, and burn defects.
Therefore, Option 1 offers better thermal control and lower burn risk, contributing to improved mold life and product quality.
3. Defect Risk Assessment and Optimization Strategy
In die casting, air entrapment and shrinkage porosity are major quality concerns. Raidy’s team performed detailed defect analysis for both designs.
3.1 Risks in Option 2
- Air entrapment in the top ring area
- Gas accumulation in horn-shaped regions
- Increased porosity due to metal flow collision
- Reduced internal density consistency
3.2 Optimization Strategies for Option 1
Although Option 1 performs better overall, targeted improvements are still necessary:
- Strengthen overflow (slag collector) design to remove cold metal
- Enhance venting system, including vacuum-assisted evacuation
- Use 3D-printed inserts in critical areas (e.g., horn section) to optimize flow behavior
- Refine local gating structure to minimize turbulence
These improvements can significantly reduce defect rates and improve product consistency.
4. Gating and Overflow System Design Experience
Raidy Mold has extensive experience designing similar oil pan and structural component molds. Based on proven projects, the recommended configuration includes:
- Single-side nozzle gating system
- Filter positioned at the water end
- Integration with machine-side thermal control components
Historical production data shows:
- Scrap rate around 14% under standard conditions
- Further reduction achievable through process optimization
- High stability and repeatability in mass production
This solution is validated by real production data, not just theoretical simulation.
5. Cost and Machine Compatibility Analysis
In addition to quality, Raidy evaluates cost efficiency and equipment flexibility.
5.1 Mold Cost Comparison
- Option 1: Compact structure, smaller mold size
- Estimated cost savings: ~200,000 RMB (~$28,000 USD) compared to Option 2
5.2 Die Casting Machine Compatibility
- Option 1: Suitable for 1250T and 1650T machines
- Option 2: Only suitable for 1650T machines due to larger mold size
Option 1 offers greater flexibility and reduces capital investment for customers.
6. Quality and Production Risk Evaluation
Disadvantages of Option 2:
- Flow collision increases air entrapment
- Higher porosity risk
- Larger mold size and higher cost
- Limited machine compatibility
Advantages of Option 1:
- More stable metal flow
- Lower defect risk
- Reduced mold cost
- Wider machine compatibility
- Further optimization potential
7. Final DFM Recommendation
Based on simulation results, engineering analysis, and cost evaluation, Raidy Mold’s technical team recommends:
Option 1: Single-side gating with filter at the water end, combined with 3D-printed inserts for local optimization
This solution provides:
- Improved flow stability
- Lower porosity and defect risk
- Better cost efficiency
- Enhanced production flexibility
- Proven feasibility for mass production
8.FAQ
Q1. What is DFM in the context of die casting mold design?
DFM (Design for Manufacturability) is a process used to optimize die casting mold designs in order to improve production efficiency, reduce costs, and minimize defects.
Q2. What problems can result from a poorly designed gating system?
A poorly designed gating system can lead to issues in die-cast parts such as porosity, shrinkage, cold shuts, air entrapment, and incomplete filling.
Q3. What role does venting play in die casting?
Venting removes air and gases from the mold cavity, thereby increasing casting density and reducing porosity defects.
Q4. How do 3D-printed inserts benefit die casting molds?
They enable the creation of complex geometries, improve localized flow control, and enhance cooling efficiency in critical areas.
Q5. Which industries utilize die casting molds?
Die casting molds are widely used in the automotive, electronics, industrial equipment, and consumer goods industries.
Q6. What is the typical lifespan of a die casting mold?
High-quality die casting molds can have a lifespan ranging from 50,000 to over 200,000 shots, depending on the materials used and the maintenance regimen.
Q7. What factors influence the cost of a die casting mold?
The cost is determined by the mold’s size, structural complexity, materials, production volume, and the required precision.
9. Raidy Mold Technical Strengths
This oil pan mold DFM case highlights Raidy’s core strengths:
- Advanced mold flow simulation capability
- Strong engineering experience in die casting molds
- Systematic DFM review process
- Ability to balance quality, cost, and manufacturability
- Integration of advanced technologies like 3D printing
By applying a structured DFM approach, Raidy Mold Manufacturer helps customers:
- Reduce trial iterations
- Shorten development cycles
- Improve first-shot success rates
- Achieve stable mass production
Raidy Mold Factory manufactures over 100 different types of HPDC molds for oil pans. We can resolve any issue. Contact us for a superior solution.
