Coating expendable substrates which contact molten metal

Details Coating expendable substrates which contact molten metal Coating expendable substrates which contact molten metal

1984-07-12

1989-10-10

Silverberg, Sam

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

164 21, 164 24, 427134, B05D 104

Patent

active

048731145

ABSTRACT:
An expendable substrate which in use contacts molten metal, for example a foundry mould or core or ladle lining, is coated with a coherent layer of refractory particles by tribo-electrically charging refractory particles coated with an organic binder, the coated particles having an electrical resistivity of at least 10.sup.10 ohm. cm. at 10kv, earthing the substate and bringing the charged particles into contact with the earthed substrate. Suitable binders are thermoplastic resins, thermosetting resins and waxes and the quantity of binder in the binder coated particles is usually less than 10% by weight.

REFERENCES:
patent: 4039697 (1977-08-01), Isawa

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