Co-injection moulding

This transformation process representing MASPI's core business allows to obtain items with high thickness.
Many planning ideas thought for injection moulding require high lining thickness for aesthetical or functional reasons.
The high thickness is barely feasible through traditional injection moulding (compact).
The cooling times inside the core of the item are long and end up with increasing its cost and, furthermore, they influence its appearance.
It happened and is still happening that, to keep the thickness or mass presumed in the project, the designer has to choose other materials (thermosetting or polyurethane resins). Resins that are not recyclable.
This causes the sacrifice of the recyclability of the finished product.
Moreover, sometimes it is necessary to intervene on the item through post-production (such as painting), so to reduce superficial flaws.
With co-Injection it is possible to keep the aesthetical and functional richness presumed by the Designer (weight, surfaces, colours) at controlled and competitive prices.
It is a non-conventional technology developed and examined in depth by our factory.
Co-injection requires the use of specific machines and has to be combined with suitable materials.
Through co-injection it is possible to produce items composed by a skin (outside) and a core (inside), which are molten in an integral and inseparable manner (sublimation).
Each material is being chosen according to the final performance required by the item.
Co-injection also allows to produce items with variable thickness from 3 to 25/30 mm.

The co-injection process calls for the introduction of an expanding agent in the inside material (core). This expanding agent develops gas in the polymeric mass during the plasticization of the polymer. It is a chemical reaction which is able to generate an internal micro-pression giving rise to micro-cavities in the core of the item.

This technique allows:
  • A light reduction of the weight of the item on equal pressure 
  • The removal of suctions due to the contraction of the polymer during the cooling phase
  • The use of compatible recycled material (core)

We’re looking for new ideas!

We’re looking for new sector where we can apply our technologies, give us your ideas or your project,
we’ll check together if we can develop it and make it concrete.

We’re open to all new proposals which have innovation and eco-sustainability as their core idea, from the home to the industrial and from the automotive to the naval sector.

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