Moulding is a more complicated form of production as to opposed to Slab stock production. Moulding formulations are usually more reactive. Each discreet  "shot" must be precisely injected into the mould in a defined pattern. The mould temperature must be controlled, and heat must often be applied to the mould to assist cure.

The polyurethane industry consists of two primarily moulding techniques: the hot cure and the cold cure.

The hot cure technique involves the application of high temperature over the curing cycle which is essential to enable the foam to reach its ultimate physical properties. The formulations are very similar to Slab stock foams although changes in the catalyst system are required to accommodate for the higher than usual temperatures.

The cold cure moulding is a recent development and unlike hot cure moulding it requires no oven to cure the foam. This system is ensured by the chemicals used in the formulation. The chemicals involved are mainly found in the isocyanate and catalyst system. This method is subject to change depending on the type of polyol used. We have thorough knowledge in this area, (refer to other section 'New Formulations'), including MDI (Source 5) moulded foams (cold cured).

PUTech is also familiar with all the different kind of waxes available on the market, including the new water based waxes. We can assist in any waxing problems: skin de-lamination, boiling and voids. (Contact us for more information)

Other problems associated in the moulding process are with the choice of moulds, consisting of price and material. PUTech can provide several solutions to ensure your moulding facility runs smoothly and efficiently. Alternative materials can facilitate the necessary criteria for your moulds involving Aluminium, epoxy resins, metal filled epoxies, etc… This is essential for the creation of a desired mould.

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