Low-Pressure Die Casting Services

Low-pressure die casting fills the die by pushing molten metal upward through a feed tube using low gas pressure, typically under a few atmospheres. The controlled bottom-up fill reduces turbulence and produces denser, lower-porosity castings compared to gravity casting, while tooling and equipment costs are lower than high-pressure die casting.

High-pressure die casting injects molten metal at very high velocity and pressure, enabling thin walls and fast cycles but introducing more turbulence. Low-pressure casting uses a slower, controlled fill under lower pressure, which produces denser parts with less porosity. High-pressure casting generally suits thin-wall, high-volume programs. Low-pressure suits structural parts where density and soundness are priorities. Redstone's engineering team recommends the right process at the feasibility review.

Aluminum alloys are the most common choice for low-pressure die casting because the process suits their density and flow characteristics well. Zinc alloys can also be run via low-pressure methods on qualifying programs. Specific alloy selection is confirmed at the technical feasibility review.

Lower porosity and better structural integrity than gravity casting. Less turbulence during fill than high-pressure injection, which reduces oxide inclusions in aluminum. Good dimensional consistency across a run. Lower tooling cost than high-pressure die casting. These characteristics make it a cost-effective fit for structural parts where density is a requirement but high-pressure tooling investment is not warranted by volume.

Standard production lead time is 4 to 8 weeks from approved tooling. Tooling and first-article timing are confirmed at the quote stage. Rush programs can be reviewed case by case.

Yes. Send the existing drawings, alloy spec, and current supplier quote. Redstone assesses the program, runs a parallel quote with certified foundries, and projects landed-cost impact before you commit.