Page 48 - Апрель

FOUNDRY PRODUCTION

The considered method of rolling flat elements into tubes is appropriate to use for
the execution of models of risers, without which the production of most types of castings
is indispensable. The walls of the tubular structure made of rolled up elements are made
impermeable to the molding sand, and the ends of the tubular structure are closed with covers
that are also impermeable to the molding sand, or the walls and ends are wrapped with a
synthetic film that does not allow the molding sand to enter the tubular structure. Thus, a model
of a riser or a manifold of a gating system is formed close in shape to a cylinder, along which
metal is poured, and to a model of which small models of castings are attached when they are
assembled into blocks or bushes.
The method of folding flat model elements during their preliminary production in molds
with a flat connector or from flat blocks of foam plastic makes it possible to obtain tubular and
other shaped, frame and spatial cellular models, which simplifies the design of model equipment
for their manufacture in comparison with the equipment in which they were formed. would
these models without folding. The described method expands the possibilities of making cellular
structures by casting, in particular, by analogs in the form of carbon frame structures from the
physics of the microworld. For monolithic model structures, it has been used for a long time at
the FTIMS, which is an example made using this method and shown in fig. 8 model for obtaining
by the LFC method a casting of the pump body (for pumping mining slurry) from wear-resistant
steel.
The proposed design of cast cellular materials by computer programs, depending on their
predicted properties, as well as the composites reinforced by them, will expand the number
of varieties of their structure and the range of functional applications. In particular, a number
of these solutions have been proposed for implementation in the development of methods
for casting two-layer reinforced and bimetallic containers for transportation and disposal of
radioactive waste, including making their walls made of composites with oxides of various
metals, incl. heavy concrete from slags as fillers.

48 Stanochniy park