Castings are susceptible to having small surface imperfections such as inclusion pits, gas microporosity, cold laps, misrun
edges, or dents, that are cosmetically unappealing or non-compliant with customer specifications.
In the first case, Mohd Nortarmizi Misrun
, 31, allegedly induced Muhammad Asyraf Nazairi, 19, into handing him RM170 by misleading the victim to believe that he could secure a B2 motorcycle licence and a D car driving licence for him.
"The best time to find Luwak coffee is in the early mornings when the droppings are fresh, because the Luwak is a nocturnal animal, but it really takes a long time to collect enough to have one kilogram to sell, and it's a lot of work," said local Gayo farmer Misrun
, who has a total of 1200 trees on half a hectare of land.
Pouring temperatures in the 2,100-2,275 F (1,149-1,246 C) range were needed to reduce misrun
scrap, but may have contributed to higher amounts of centerline shrinkage porosity.
In this case, the residual sand had prevented the normal passage of the molten metal, leading to a misrun
defect in that particular area.
If, for example, a misrun
defect was observed in a casting and it was known that the metal was poured 45 degrees below the lower specification limit established for the part, then the cause would be assignable.
The software performs misrun
formation predictions, including permeability-calculations for the "mushy zone," providing enhanced enmeshment techniques for designing thin-walled castings.
Wireline Engineering estimates that the Advanced Kickover Tool can deliver very significant cost savings as the risk of misruns
and operating overruns is reduced.
In the work by Karunakar & Datta, an attempt was made to predict major casting defects like cracks, misruns
, scabs, blowholes and air-locks by using back-propagation neural networks from the data collected from a foundry.
Inefficient dross removal practice can lead to filter blockages, quickly leading to misruns
and slow pours.
Besides a few minor misruns
attributable to a lower melt superheat than currendy is used to produce this head, the casting passed all other inspection criteria.