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Gravity Casting

Gravity casting is a manufacturing process used to create metal parts, particularly those with complex shapes or fine details. It is also known as permanent mold casting or gravity die casting.

The process involves pouring molten metal into a reusable mold made of steel or cast iron. The mold is designed to have a specific shape and cavity that will create the desired part. The molten metal is poured into the mold by gravity, which is why it is called gravity casting.

Once the molten metal cools and solidifies, the mold is opened and the part is removed. The part may require additional finishing, such as trimming, polishing, or machining, to achieve the desired surface finish and dimensional accuracy.

Gravity casting is commonly used for producing parts for the automotive, aerospace, and industrial sectors. It offers several advantages, including the ability to produce complex shapes with high precision and excellent surface finishes. It is also a relatively efficient process, allowing for the production of large quantities of parts in a short amount of time.

Tooling Material Aluminum,45#, P20, H13, 718, 1.2344, 1.2738 and so on
Material Aluminum, Aluminum Alloy, ADC12 , A380, AlSi10Mg or customized .
Casting Tolerance DIN 7168-m, CT9-CT10
Dimension 3mm to 2000mm
Tooling Life 50K pieces
Quality Test CMM
Part Weight from 3 g — 20kgs
Surface Treatment Mill-Finished, Powder Coating, Polishing, Brushing, etc.
Drawing format IGES, STEP, AutoCAD, SOLIDWORKS, STL, PTC Creo, DWG, PDF, etc..
Deep Processing CNC / Cutting / Punching / Checking / Tapping / Drilling / Milling



  1. High quality: Gravity casting produces parts with high dimensional accuracy, good surface finish, and excellent mechanical properties.
  2. Efficient: Gravity casting can produce parts in high volumes with minimal waste material and low labor costs.
  3. Versatile: Gravity casting can be used with a variety of metals, including aluminum, brass, and bronze.
  4. Repeatability: Gravity casting can be used to produce identical parts with consistent quality, suitable for mass operation.
  5. Smooth surface: Gravity casting produces smooth surface finish.
  6. The parts of gravity casting with less pores and can be heat treated. After heat treatment, the strength of the products can be greatly improved, even more than the die casting products.
  7. Large range of alloy choices.The special aluminum alloy with low liquidity can be manufactured by gravity casting way.


  1. The surface of the product is not smooth enough, the gravity casting products tend to form pits on the surface after cooling similar to those that are easily generated after shot blasting.
  2. Slow filling speed and low production efficiency. Its production efficiency is only 1/4 of the high pressure die casting, leading to the increase of production cost.
  3. Limited size range: Gravity casting is not suitable for producing very large parts.


die casting process

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