Why is Vacuum Casting Preferred for Prototype Model PPT (1)
                     Why is Vacuum Casting Preferred for 
Prototype Model Making?
      
                                                                                                                      
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Vacuum casting  is a widely used technique for the 
production of plastic prototypes. Vacuum casting is not 
only more economical but also the ideal process for 
low to medium scale production of plastic prototypes.
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Vacuum Casting: The process
The process of vacuum casting consists of multiple stages. The overall 
process is labor-intensive but still relatively fast-paced and easy to 
manage. The process is described as stage-wise as follows:
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1. Creating a master model
First of all, a master model has to be created or obtained on the shelf. 
The master pattern can be an industrial part or one created through 
rapid manufacturing techniques like 3d printing or CNC machine tools.
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2. Producing the mold
Once the master model is put inside the casting box, liquid silicone is 
poured all over it and then it is left to cure in an oven. The cured liquid 
silicone mold is then cut open and the master mold has removed that 
leaves behind an empty cavity. 
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3. Making the casting copies
 Now suitable resins (or polyurethane that are like rubber) are mixed to ensure that 
the mixture has the same properties as the industrial part. The mixture is poured 
into the empty cavity to form the desired finished mold or product. The resin is 
then cured in a vacuum so that no air bubbles are trapped.
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Why vacuum casting method is preferred
1. Quick results
The vacuum casting process is significantly rapid and you can get 
a fixed volume of fully working models in almost fewer days.
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2. Reduced cost of production
 Silicone is a comparatively cheaper material and a single mold can be 
used for multiple prototypes, the process is overall very economical as 
compared to other traditional methods.
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3. Better product quality
In Vacuum Casting Service, not only the process is fast but also the 
final high quality and has better structural properties, rigidity, and 
hardness. 
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4. Better product finish
 Silicone is the mold material, the final product has an excellent finish 
and accurately resembles the master pattern. Even the finest of 
details are captured in the finished product.
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 Vacuum Casting Service technology can often achieve the 
same results with shorter lead times and if without special 
material requirement. When large industries have to meet 
deadlines in a short period and just for functional and 
working prototype testing, vacuum casting can often be a 
better choice depending upon the requirements.
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Taluka Pune.
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