Studies of protective coatings used for metal moulds

The die casting method is based on casting into permanent metal moulds, which makes it possible to obtain a large amount of casts with practically identical shapes. Compared to the technology of sand mould casting, this method has many advantages. However, it thus faces completely different requirements concerning the conditions of both filling the mould and metal solidification. That is why it seems important to select the appropriate protective coatings applied on the moulds, which provide control over the particular processes as well as facilitate the removal of the cast and prolong the durability of the metal moulds.
The study included investigations of the dynamic and relative viscosity of protective coatings (ground, insulating and thermal conductive) used for metal moulds. The examinations were performed at 25°C. Also, an attempt was made at evaluating the environmental performance of the used coatings at the temperature of their application onto the metal moulds (200°C) as well as the temperature of the moulds’ operation (400°C) based on chromatographic tests.

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