Measures to Suppress Gas Defects (Porosity) in Aluminum Die Casting – Utilization of Vacuum Equipment and Spray Robots

What are porosity defects in aluminum die casting? Porosity refers to the phenomenon where bubbles or voids occur within the metal during the aluminum die casting process. This is a type of defect that severely impacts the strength and performance of aluminum castings. It is particularly critical for components requiring high quality, such as automotive parts and electronic components.
- Main Causes of Porosity in Aluminum Die Casting
+ Gas Entrapment in Molten Aluminum
When molten aluminum is injected into the mold, air can be entrained in the flow, leading to the formation of bubbles within the metal.
+ Contamination by Impurities and Moisture:
Moisture and impurities in the molten metal can generate gas during the casting process, which then becomes trapped inside the casting.
+ Cooling Method:
Temperature differences during cooling can cause uneven shrinkage of the metal, resulting in the formation of porosity and voids within the casting.
+ Improper Use of Release Agent (Insufficient or Excessive):
Insufficient release agent reduces the molten metal's ability to fill the mold, while excessive amounts leave residues that can cause porosity defects.
- Porosity Suppression Measures at Yamaguchi
To minimize porosity in aluminum die-cast products, our company combines multiple technologies with optimal production management strategies.
+ Optimization of Casting Conditions:
By appropriately setting temperature, pressure, and injection speed based on material properties and product requirements, we ensure stable quality and minimize defects.
+ Use of Vacuum Equipment:
Vacuum equipment removes air and gas generated during the casting process, effectively reducing porosity, especially in products with complex shapes.
+ Improvement of Venting Structure within the Mold:
Optimizing the position and design of venting channels enhances gas discharge efficiency, improves the molten aluminum's mold-filling capability, and prevents porosity.
+ Addition of Overflows:
This enhances the effect of expelling excess gas out of the mold during the casting process, reducing gas accumulation and improving product density.
- Strengths of Yamaguchi's Aluminum Die Casting Technology
🔹 Our die casting machine systems, ranging from 420 tons to 800 tons, meet diverse production needs.
🔹 We can manufacture parts weighing up to 6.5 kg.
🔹 We boast a monthly production capacity of approximately 45,000 units.
🔹 By performing integrated processing within our factory, we achieve high quality and quick delivery times.
- Quality Assurance and Production System
1. Quality Management System
Our company implements strict quality control processes, including visual inspection and precision inspection, at each stage from casting to surface treatment.
2. Advanced Equipment and Technology
By combining the latest die casting machine systems with shot blasting machines, we ensure uniform quality even for products with complex shapes.
3. Flexible Delivery Capability
By optimizing our production schedule, we can respond flexibly and promptly to customer orders.
At Yamaguchi, we minimize porosity defects in aluminum die-cast products through optimization of casting conditions, use of vacuum equipment, improvement of venting design, and addition of overflows. Furthermore, our die casting machine systems, ranging from 420 tons to 800 tons, can accommodate thin-walled products of 2-3mm and heavy parts up to 6.5kg. With our integrated production system from design to completion, we promise to deliver aluminum die-cast products with stable quality and short lead times.