Vacuum casting is a technique that makes it possible to produce small series in a short time span and at a relatively low cost, using silicone moulds.
Making a silicone mould requires a master pattern. In most cases, this is a finished SLA product. However, it is also possible to use existing objects for this purpose.
The lifespan of a silicone mould depends on the number of counterdrafts in a product and the selected casting resin. This can vary from 10 to 60 casts. On average, one silicone mould can produce approximately 25 casts.
A substantial range of polyurethane casting resins makes it possible to imitate many types of plastics. Some examples are PP, ABS, PC, rubber, silicones, etc. The quality of the vacuum-shaped material comes close to the ultimate casting quality. Since most of the resins are sustainable, almost all colours can be approximated.
Items such as food approval or flame-retardant materials are also possible.
The technique furthermore lends itself to encapsulating metals and/or plastic parts. Two-component casting is also part of the options.
In addition to casting with polyurethane resins, SKM is also experienced in casting with PA6 and PA12, due to its food safety approval from the FDA, the highest food safety authority in the world. SKM Rapid is the only company authorised to do this.
Reasons to select vacuum casting:
- Small series must be produced
- The product must possess specific material properties