Application Background
In the production of a motorcycle bracket die casting component, several typical issues were observed, including aluminum sticking on inserts, insufficient cooling efficiency, cold shuts in local areas, and gate breakage during trimming.
To address these problems, a targeted Die Casting Mold Optimization was implemented, focusing on cooling system redesign, structural adjustment, venting improvement, and gating system modification.
RaidyMold has extensive experience in handling such optimization cases, providing practical and effective solutions for improving mold performance.
Cooling System Optimization
The direct cooling water channels of both the fixed mold and moving mold, along with the large cooling pipes, were redesigned into a specified configuration to improve overall cooling consistency.
Two inserts in the mold showed a tendency for aluminum sticking. These inserts were optimized into point cooling inserts to enhance localized cooling performance.
Considering operating conditions where cooling water pressure is relatively low, the original integrated water base design for point cooling resulted in insufficient flow and limited cooling effectiveness.
As part of this Die Casting Mold Optimization, the cooling design was modified into a separated water base system. Each insert was connected to an independent cooling circuit, ensuring sufficient flow and improving heat dissipation efficiency, thereby reducing aluminum sticking.
Structural Adjustment
Based on specific C-plate configuration requirements, several structural optimizations were carried out:
- Adjustment of ejector plate slot dimensions
- Modification of support block height
- Repositioning of guide pillars and support pillars
These changes improved mold assembly compatibility and operational stability.
Venting Improvement
Cold shut defects were identified in three pillar areas of the mold. To resolve this, venting grooves were added to the corresponding inserts.
These venting grooves were connected to the cooling through-holes in the mold base, allowing gas to escape more efficiently during the filling process. This optimization improved metal flow and reduced cold shut occurrence.
Gating System Optimization
Two gate locations showed a tendency for breakage during trimming.
In the optimized design, the distance between the gates and the product was increased based on existing structural references. This adjustment reduced stress concentration and improved trimming performance.
Runner Design Optimization
The original runner design utilized a bridge-type structure. Based on mold flow analysis, a slag well configuration was determined to be more suitable for this application.
In this Die Casting Mold Optimization, the bridge runner was replaced with a slag well structure, and additional venting grooves were incorporated to further improve filling behavior and exhaust efficiency.
Optimization Outcome
Through this Die Casting Mold Optimization, improvements were achieved in:
- Cooling efficiency and stability
- Reduction of aluminum sticking on inserts
- Improved venting performance
- Decreased risk of cold shuts
- Enhanced gate trimming reliability
RaidyMold continues to apply practical engineering solutions to optimize die casting molds for stable and efficient production.
FAQ
Q1: What is Die Casting Mold Optimization?
A1: It is the process of improving mold design, including cooling, venting, and structure, to enhance casting performance and reduce defects.
Q2: What causes aluminum sticking in die casting molds?
A2: It is often caused by insufficient cooling or localized overheating, especially around inserts.
Q3: Why is independent cooling important in inserts?
A3: Independent cooling ensures sufficient flow and stable temperature control, particularly under low water pressure conditions.
Q4: How do venting grooves improve casting quality?
A4: They allow trapped gas to escape, reducing defects such as cold shuts and improving metal flow.
Q5: What is the advantage of a slag well over a bridge runner?
A5: A slag well helps improve filling behavior and trap impurities, resulting in better casting quality.
Q6: Why adjust gate distance in mold optimization?
A6: Increasing gate distance can reduce stress concentration and prevent breakage during trimming.
Q7: When is Die Casting Mold Optimization necessary?
A7: It is typically required when defects such as sticking, poor cooling, or filling issues occur during production.
