B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/158, 18/958
B22C 9/00 (2006.01)
Patent
CA 1053440
Abstract of the Disclosure Solid particulate material are bonded together to form a shaped article by (i) forming a mixture of the particles and an anaerobically-curing adhesive and moulding the mixture to the desired shape, (ii) initiating cure of the adhesive to bond the particles together by maintaining the shaped article in a substantially oxygen-free environment, and (iii) heating the shaped article to complete the cure of the adhesive. The anaerobic adhesive may comprise, as monomer, an ester of an acrylic acid, with a hydroperoxide or peroxide a a polymerisation catalyst, and the oxygen-free environment may be produced by displacing air with nitrogen or other inert gas or vapor. Heating to accelerate the cure may be effected by using hot nitrogen, or the shaped article may be heated by dielectric heating, for example. The method described is suitable for the production of foundry moulds and cores, which rapidly attain high compression strengths, form sand or other particulate material.
195352
Green George E.
Stark Bernard P.
LandOfFree
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