Polyurethane Resin Silicone Vacuum Casting Parts Flexible plastic functional parts

Product Description:
Vacuum casting uses silicon moulds to make a high-quality prototype of plastic and rubber components using two-component polyurethanes resins.

What is Vacuum casting?
Vacuum casting, sometimes referred to as Urethane casting or Polyurethane casting uses silicone moulds to make plastic and rubber components under vacuum. It is an extremely adaptable manufacturing process capable of mimicking the injection moulding to produce complex parts in polyurethane resins and cast nylon.
Due to the process being under vacuum, it produces high-quality bubble-free casting with smooth surface texture without any blemishes.
Vacuum casting can be extremely useful in rapid prototyping injection moulding parts and worth considering when selecting rapid prototyping processes for plastic or rubber parts.

Applications of vacuum casting
Vacuum casting is one of the most cost-effective ways to produce high quality, low volume plastic parts which can be similar to injection moulding parts
The parts are especially suitable for form, fit and function tests during the embodiment design stages, where they can be used for marketing, field user testing and product design verification purposes
There are many Urethane casting resins commercially available that can be used to create parts to satisfy a wide range of design requirements such as temperature requirements, different surface textures, hardness, etc.
Materials are also available to create parts that are fully opaque, translucent or completely transparent
Sometimes high-quality wax masters can be made using vacuum casting for investment casting to increase the finer details of intricate features

Typical technical specification

1,Polyurethane sealant has the following characteristics: excellent abrasion resistance; low-temperature flexibility; performance can be adjusted to a wider range; mechanical strength; good adhesion; good elasticity, excellent restorative properties, can be suitable for dynamic joints; good weather resistance, service life of up to 15 to 20 years; excellent oil resistance; biological aging resistance; moderate price.
2,Polyurethane sealant also has some disadvantages. Such as: not long-term heat resistance; light-coloured formulations are susceptible to ultraviolet light aging; one-component adhesive storage stability by packaging and external influences, usually slower curing; high-temperature thermal environment may produce bubbles and cracks; many occasions need primer. At the same time, the water resistance of polyurethane sealant is also poor, especially alkali water resistance is not good.



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