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Vacuum casting, also an urethane casting or Polyurethane casting, is a manufacturing process In which resin material is put into a mould with the help of a vacuum.
This process offers great flexibility and is capable of replicating the results achieved through injection molding, allowing for the creation of complex parts using polyurethane resins and cast nylon.
One of the key advantages of vacuum casting is its ability to produce high-quality castings without any bubbles or imperfections. The vacuum environment helps to eliminate air trapped within the mold, resulting in smooth surface textures and flawless finishes.
This technique proves especially valuable in rapid prototyping applications where injection molding-like parts are required. By employing vacuum casting, manufacturers can efficiently produce prototypes of plastic or rubber parts, enabling testing, evaluation, and refinement before proceeding to mass production.
| Time frame | Within 1 to 5 working days for up to 10-30 parts |
| Material choice | Wide variety of materials available |
| Accuracy | ±0.35%(with a lower limit of ± 0.3 mm on dimensions smaller than 100 mm) |
| Minimum wall thickness | To ensure that the mold is filled properly, a wall thickness of at least 1mm mm is necessary. But best results are achieved with a recommended wall thickness of 1.5 mm-2mm |
| Maximum part dimensions | The size of the mold is limited by the dimensions of the vacuum chamber |
| Typical quantities | Up to 18-20 parts per mold |
| Surface structure | Gloss to Matt surface finish can be obtained |
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