Vacuum-Assisted Die-Casting in Zamak-5 Zinc Alloy Lock Housings
Engineering Overview: Quality engineering guide on vacuum die-casting process parameters to eliminate internal gas porosity in residential zinc lock cylinder housings.
Technical & Engineering Specifications
| Alloy | Zamak-3 / Zamak-5 Zinc Alloy |
|---|---|
| Process | Vacuum-Assisted Hot-Chamber Die-Casting |
| Porosity Limit | < 1.0% Internal Micro-Void Volume |
| Impact Strength | Tested to 120 ft-lbs without fracture |
Porosity Elimination in Zinc Die-Casting
In budget residential locksets, zinc die-cast housings (Zamak-3/5) can fail under impact if internal gas porosity exceeds 3%.
Vacuum Evacuation
- Vacuum Mold Evacuation: $<50\text{ mbar}$ vacuum before injection eliminates bubbles, increasing impact toughness by 35%.
Frequently Asked Engineering & Selection Questions
Q1: What are the primary material characteristics of this finish?
Quality engineering guide on vacuum die-casting process parameters to eliminate internal gas porosity in residential zinc lock cylinder housings.