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Skills and know-how

The activities of CEP are all based in the plastic industry, a relatively young sector, which grew up quickly within the last 50 years.
Materials of the third millennium, plastics are partners of every major technological challenge and progress of our time.


CEP essentially uses “thermoplastic” (polystyrene and polypropylene), renowned for being rigid and solid at room temperature, to soften as its temperature increases and to become liquid at around 250°C. Polystyrene and polypropylene do not release any toxic gas at room temperature and can be easily recycled on melting.


What is an injection mould?

An injection mould is a type of giant “waffle iron” made up of two sections which fit together. The hot and liquid plastic runs into the channels of the mould to give a shape to the product. All our moulds are designed on site in 3D and then manufactured by experts.

Plastic injection

The injection press used consists of an open-ended screw and a frame supporting the two sections of the mould. The frame opens and closes to allow the two sections of the mould to open and close successively.
The plastic pellets are introduced into the open-ended screw and heated to 250°C. When it becomes liquid the plastic is injected under high pressure into the closed mould, filling all the gaps. The mould cools the plastic down to room temperature. It then opens up, releases the plastic product which can be removed and packed. The injection process alone produces perfectly formed products of all shapes and sizes which can weigh between a few grams (plastic tube tops for example) to several kilograms (car bumpers).
The principal sectors using this technology comprise of: car, electronic, robotic, air and medical industries...



Rheology (in Greek, rhein : to flow), is the science of flowing liquid material. It is the correct structure of liquid plastic flowing properties which enables the creation of very precise plastic distribution, optimizing quality standards (finish and solidity) and manufacturing constraints.

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