Moulds FOR PRODUCING LARGE TYPE variation in wall thickness of iron castings SLEEVES

摘要

1. A mold for the manufacture of large variation in iron castings type plugs, preferably plugs cylinders potent marine diesel engines, comprising a lower mold part mounted thereon middle part of the mold forming the outer surface of the casting, core rod for forming an internal casting cavity formed in a hollow frame with a perforated tube with holes for outlet of gases, the rod with the gating system elements, an upper mold part with two orifices for pouring molten metal and otve pation exit gases and disposed thereon pouring basin with a runner, and the refrigerant supply system to conduit communicating with the hollow central rod frame, and a nozzle-sprayer mounted on the end of the pipeline in the frame cavity, characterized in that it is made of molding compounds, heat-retaining capacity of which increases with decreasing wall thickness of the casting, the outer shaping surface in massive parts of the sleeve are provided with a refrigerator, the sprue cup is in the form of alivochnogo basin accommodating ½ necessary for pouring molten iron into the mold, with the sprue overlap blocking devices, wherein the mold is made of round flasks in a layer thickness of molding a mixture of 1.5 ... 2.0 of the wall thickness of the casting in the corresponding section, refrigerators are made as uniformly distributed over the mold surface prisms total weight of 0.07 ... 0.14 by weight in an appropriate casting sechenii.2. The mold according to claim 1, characterized in that the distance between the individual refrigerators no next page