Writing in a reader-friendly and logical layout, Andresen, a technical and administration advisor, presents a huge examine of every approach within the die casting technique and descriptions the fundamental technology and ideas of this system. whereas the scope of the textual content is huge, concentration is on functionality, challenge identity and options, and strategic good judgment. insurance contains product layout, the die casting desktop, steel dealing with, strategy keep watch over, die fabrics, die and plunger lubrication, and defense. even if there aren't any textbook good points, the step by step presentation and transparent writing type will make the ebook worthy as a reference and a textual content. Annotation ©2004 booklet information, Inc., Portland, OR
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Additional info for Die Casting Engineering: A Hydraulic, Thermal, and Mechanical Process
Heavy masses can cause voids. The rapid solidification that occurs in high pressure die casting results in volumetric shrinkage at high mass locations. The last place to solidify is 5935-4 Andresen Ch02 R3 101404 Product Design 41 Figure 7 Figure 8 where shrink porosity can be expected, as seen in Fig. 7. One plan to reduce mass with a metal saver is shown in Fig. 8. Note that shrinkage porosity can be expected in the massive detail. Alignment of dimensional details is best achieved when each detail is formed by the same die component.
It is therefore good to clearly identify them and explain the importance of each. This information then becomes the basis for locating the shape for subsequent machining and positioning of cavity details in the proper die half relationship for concentricity, alignment, etc. It also defines gage points for quality control of dimensions. Since die casting is the shortest route from ingot to net shape, considerable production economies are possible. There are, however, several other reasons for the product designer to decide on die casting a proposed shape.
Aluminum is abrasive to die materials so gate speeds have to be throttled back, thus increasing cavity fill time, sometimes compromises quality. This abrasive characteristic limits the die life, which adds frequent replacement of cavity details to the cost structure. Aluminum is the metal of choice for functional non-cosmetic products and can be cast at slower gate speeds to 5935-4 Andresen Ch02 R3 092904 34 Chapter 2 minimize turbulence within the cavity during fill. It is always cast in cold chamber machines because iron conduits are dissolved rapidly in aluminum.