SET OF PATTERNS FOR MAKING CERAMIC MOLDS FROM DISPENSABLE PATTERNS Russian patent published in 1994 - IPC

FIELD: foundry practice. SUBSTANCE: set of patterns comprises metal core with stop at the top for registering the pattern of pouring basin, a device for fastening the pattern links on core, a pouring basin pattern and pattern links with feeders and holes for slipping on the core. The latter has a projection extending throughout its length. The set is additionally provided with a removable metal bushing arranged on core, coaxially therewith. The external surface of the bushing has projections extending throughout its length for overlapping feeders on pattern links. Upper part of bushing has retainer while the pouring basin pattern has a matching projection. EFFECT: improved design. 2 cl, 9 dwg