What are the factors that influence the quality of nodular cast iron manhole cover

What are the factors influencing the quality of nodular cast iron manhole cover? Let botou tianlong casting brief introduction.

First: ductile iron manhole covers design and manufacturability: design, in addition to according to the working conditions and the metal material performance to determine the geometry size, also must from the Angle of the casting alloy and casting characteristics to consider the rationality of the design.

Second, the reasonable casting process is, according to the structure of ductile iron manhole covers, weight and size, casting alloy characteristics and production condition, choosing the appropriate parting surface and modelling, core-making methods, establish the reasonable casting steel, cold iron, riser and gating system, and so on, in order to ensure access to quality of castings.

Third: the quality of the casting materials: metal furnace charge, refractory materials, fuel and flux, modifier and casting sand, sand binder, the quality of the coating materials such as unqualified, casting cause porosity, porosity, slag inclusion, defects such as adhering sand, affect the quality of ductile iron manhole cover's appearance and inner quality, serious when the casting scrap.

Fourth: process operation: make reasonable process operation procedures, improve the technical level of the workers, and make the process procedure properly implemented.

All in all, we can see, there are many factors affect the quality, so the production of ductile iron manhole covers, botou tianlong casting Suggestions, we must pay special attention to in production, we should not only from the design process, material, casting quality into consideration, but also learn from its usefulness, strive for when to use more security.