Coinjection

Coinjection, sandwich or two-component moulding, is the technique of injecting two materials, one solid and one with chemical foaming agent, into a mould in a programmed manner through the same injection nozzle in order to produce a thick moulding with a solid outer skin of regular plastic and an inner core of structural foam. This technique substantially overcome warping, cracking, shrinkage and much of the built-in-stress found in conventionally moulded thick components.

Coinjection or bi-component moulding represents the best system of producing thermoplastic items having a section of 5 mm or more (0,2 inch or more), but requiring a smooth glossy surface.

Considering that first quality material is needed only on the outside, and that second quality material can serve as a filler, there can be important savings. Furthermore, in making coloured items, colour concentrate is needed only for the outer component thus reducing also colouring costs.

Furthermore another big adavantage of this technique is the small investment of moulds. Because of the low pressure you need for production, moulds are possible to produce in Aluminium. The costs are much more lower than conventional moulds in steel. Now it is possible to realize a small or medium sized series in a manageable cost structure.

We offer a full service for the development, construction and production of the mould up to the production and delivery of the parts you need. Please ask for an offer without obligation.

info[at]industrialpartners.de

Dishbrush adapter produced with the
coinjection technology.