Growing emission requirements are forcing the foundry industry to seek new, more environmentally friendly solutions. One of the
solutions may be the technologies of preparing moulding and core sands using organic biodegradable materials
as binders. However, not only environmental requirements grow but also those related to the technological properties
of moulding sand. Advancing automation and mechanization of the foundry industry brings new challenges related to the moulding sands.
Low elasticity may cause defects during assembly of cores or moulds by the manipulators.
The paper presents the study of flexibility in the room temperature according to new method and resistance to thermal deformation of selfhardening
moulding sands with furfuryl resin, containing biodegradable material PCL. The task of the new additive is to reduce the
moulding sands harmfulness to the environment and increase its flexibility in the room temperature. The impact of the additive and the
effect of the amount of binder on the properties of mentioned moulding sands were analysed. Studies have shown that the use of 5% of
PCL does not change the nature of the thermal deformation curve, improves the bending strength of tested moulding mixtures and
increases their flexibility at room temperature.
The article shows the influence of environment requirements on changes in different foundry moulding sands technologies such as cold
box, self-hardening moulding sands and green sands. The aim of the article is to show the possibility of using the biodegradable materials
as binders (or parts of binders’ compositions) for foundry moulding and core sands. The authors concentrated on the possibility of
preparing new binders consisting of typical synthetic resins - commonly used in foundry practice - and biodegradable materials. According
to own research it is presumed that using biodegradable materials as a part of new binders’ compositions may cause not only lower toxicity
and better ability to reclaim, but may also accelerate the biodegradation rate of used binders. What’s more, using some kinds of
biodegradable materials may improve flexibility of moulding sands with polymeric binder. The conducted research was introductory and
took into account bending strength and thermal properties of furan moulding sands with biodegradable material (PCL). The research
proved that new biodegradable additive did not decrease the tested properties.
The paper presents possibility of using biodegradable materials as parts of moulding sands’ binders based on commonly used in foundry
practice resins. The authors focus on thermal destruction of binding materials and thermal deformation of moulding sands with tested
materials. All the research is conducted for the biodegradable material and two typical resins separately. The point of the article is to show
if tested materials are compatible from thermal destruction and thermal deformation points of view. It was proved that tested materials
characterized with similar thermal destruction but thermal deformation of moulding sands with those binders was different.