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Die Casting Technique: Dosing Accuracy, shot weight stability, better scrap rate

2023-07-04

Die Casting Technique: Dosing Accuracy, shot weight stability, better scrap rate

壓鑄技術, 压铸技术, die-casting technology, ダイカスト技術,

In the industry, maintaining and improving the quality of castings is the biggest challenge for engineers. However, with the evolution of technology and advancements in manufacturing facilities, scholars have found a correlation in die casting technology:”Dosing Accuracy = shot weight stability = better scrap rate”.

So, does shot weight accuracy relate to or correlate proportionally with the yield and quality of castings? The points summarized below highlight the advantages of maintaining stable shot weight, which contributes to several benefits in HPDC production:

“The benefits of shot weight accuracy in HPDC”

  • Consistency in Part Quality

    The shot weight determines the amount of metal injected into the die, which in turn determines the final weight and dimensions of the part. If the shot weight is unstable, it can lead to variations in the dimensions and weight of the cast parts, resulting in poor part quality and increased rejection rates.

  • Predictability in Process

    Stable shot weight enables the die casting process to be more predictable and manageable. By keeping the shot weight constant, the process parameters such as injection pressure and cycle time can be optimized and set more accurately, leading to more consistent production runs.

  • Lower Scrap and Rework Costs

    Stable shot weight reduces the likelihood of defective parts being produced, thus minimizing the need for scrap and rework, which can be costly in terms of time and materials.

  • Improved Yield and Efficiency

    By producing parts with consistent weight, stable shot weight can improve yield and efficiency by allowing the die casting process to run at maximum capacity, thereby reducing cycle time and increasing production rates.

Overall, stable shot weight is essential for ensuring consistent part quality, improving process predictability, reducing scrap and rework costs, and increasing yield and efficiency in die casting production.

“Practical Example”

Stotek dosing furnace with Toyo Cold Chamber Machine:
You can see the production record that the biscuit size is very stable, better than traditional auto ladle.
Scrap rate in HPDC is determined by how well you can control all the parameters. If you shot weight is off, everything afterward will be off too.

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