Improvements in and relating to machines for introducing moulding material, for instance moulding sand, into moulding boxes by means of compressed air

摘要

881,777. Feeding moulding material to moulds. NOKEL, W., and SCHRADER, H. May 29, 1959, [July 5, 1958] No. 18338/59. Class 87(2). [Also in Groups XXII and XXX] The lining member 7 of a machine for blowing moulding material into boxes e.g. when making ceramic or masonry mouldings, is made of an air-permeable porous material such as sintered metal, porous plastics, ceramic or ceramic made particularly porous by means of gas formers or burning-out materials. The porosity may be different in parts of the member, by using different wall thicknesses or materials with varying porosity.