| abstract |
The invention relates to a method of producing sleeves for mini-feeders. According to the invention, a fluorine-free mixture, which contains aluminium silicate microspheres, an oxidizable metal, such as aluminium powder, an oxidizable agent and magnesium by way of an exothermic reaction initiator, is introduced by means of blowing into a mould comprising two male parts in order to produce a sleeve having two openings, one of which is sealed with a plug before use. |