All your casting dimensions are incorrect in the same proportion.Defect: Improper Shrinkage Allowance-All casting alloys shrink as they solidify, but each does so at a different rate. The metalcaster will reduce or modify its binder usage to alleviate the defect.Ĩ. This defect can occur when too much binder in the sand causes a crevice to form in a mold or core during mold preparation or casting. A protrusion of metal is sticking out of a 90-degree corner of one of your castings.Defect: Fillet Vein-These types of metallic projections can divide an interior casting angle in half. The defect is partly a function of the section thickness designed into the casting, but it also can be influenced by the metalcaster’s pouring temperature, alloy purity, riser use and pouring speed.ħ. Axial (or centerline) shrinkage, most often plate-like in shape, occurs when the metal at the center of the casting takes longer to freeze than the metal surrounding it. Upon x-ray, you observe a cavity in the middle of your casting.Defect: Axial Shrinkage-All metal shrinks as it solidifies.
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