Abstract: A core (1) for producing castings (100) in a modular mold; each casting (100) having at least one thermally activatable portion (102) shaped so that it can face a heat source (HS); each casting (100) having at least one duct (106) contained inside the portion (102); the duct (106) being fluid tight so that a fluid can flow through it; the core (1) having a suitable shape to form, in negative, the duct (106); the core (1) including at least one insert (20)(20?)(20?) shaped so as to define at least two passages (200)(200?) for the fluid inside the duct (106).

Abstract: A core (1) for producing castings (100) in a modular mould; each casting (100) having at least one thermally activatable portion (102) shaped so that it can face a heat source (HS); each casting (100) having at least one duct (106) contained inside the portion (102); the duct (106) being fluid tight so that a fluid can flow through it; the core (1) having a suitable shape to form, in negative, the duct (106); the core (1) comprising at least one insert (20)(20?)(20?) shaped so as to define at least two passages (200)(200?) for the fluid inside the duct (106).

Abstract: A method of producing shrink sleeve labels comprises: unwinding a feed reel of heat-shrink film; separating at least one band of heat-shrink film from the feed reel; feeding the band of heat-shrink film to a formation spindle; winding the band of heat-shrink film around the formation spindle, there being provided an overlap region between a first longitudinal end of the band of heat-shrink film in contact with the formation spindle and the second longitudinal end of the band of heat-shrink film, transferring the sleeve label to a container to be labeled; interposing a layer of solvent, at the overlap region, between at least one portion of the first longitudinal end and at least one portion of the second longitudinal end, the layer of solvent having a thickness comprised between 0.002 mm and 0.09 mm.