FUNDAMENTALS OF METAL CASTING

More documents

Recommendations

Info

Shrinkage Allowance •Patternmakers account for solidification shrinkage and thermal contraction by making mold cavity oversized •Amount by which mold is made larger relative to final casting size is called pattern shrinkage allowance •Casting dimensions are expressed linearly, so allowances are applied accordingly ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Directional Solidification •To minimize damaging effects of shrinkage, it is desirable for regions of the casting most distant from the liquid metal supply to freeze first and for solidification to progress from these remote regions toward the riser(s) Thus, molten metal is continually available from risers to prevent shrinkage voids The term directional solidification describes this aspect of freezing and methods by which it is controlled ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Page 1 and 2: FUNDAMENTALS OF METAL CASTING •Ov
Page 3 and 4: Figure 10.1 - Classification of sol
Page 5 and 6: Capabilities and Advantages of Cast
Page 7 and 8: Parts Made by Casting •Big parts:
Page 9 and 10: The Mold in Casting •Contains cav
Page 11 and 12: Two Categories of Casting Process 1
Page 13 and 14: Figure 10.2 (b) Sand casting mold
Page 15 and 16: Forming the Mold Cavity •Mold cav
Page 17 and 18: Gating System Channel through which
Page 19 and 20: Heating the Metal • Heating furna
Page 21 and 22: Solidification of Metals Transforma
Page 23 and 24: Solidification of Pure Metals •Du
Page 25 and 26: Most alloys freeze over a temperatu
Page 27 and 28: •Solidification takes time Solidi
Page 29 and 30: Mold Constant in Chvorinov's Rule
Page 31 and 32: Figure 10.8 - Shrinkage of a cylind
Page 33: Solidification Shrinkage •Occurs
Page 37 and 38: Figure 10.9 - (a) External chill to

FUNDAMENTALS OF METAL CASTING

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?