Vacuum Casting

Vacuum Casting

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.


Steps for Vacuum Casting

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Technical Specification

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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