1) What type of defect can occur if molten metal is poured at a temperature that

Question

1) What type of defect can occur if molten metal is poured at a temperature that is too high?

2) What is the name given to contaminants or metal oxides that arise from molten metal's a?nity for entrapping gases?

3) What is the device that can be used to promote directional solidi?cation within a casting or help reduce the time necessary for the casting to solidify?

4) The mold production equipment that uses impeller blades to ?ing sand into a ?ask at a reasonably high velocity.

5) What type of equipment is used to pack sand around the pattern by lifting, dropping and squeezing?

6) What is the pattern material used by the evaporation mold process?

7)What material is used to make permanent molds?

8) Where is the metal melted in hot chamber die casting machines?

9) What is the term for the object used to create a void within a metal casting?

10) What is the principle quantifying the ease or di?culty in which a metal ?ows in the molten state?

11) What is the casting method used by the semi-solid casting process to keep the metal at the correct temperature?

12) Which of the casting processes would be best suited for a product that is: very large, is made from steel, and surface ?nish can be obtained from machining?

13) What is the name given to the vertical portion of the gating system that allows the molten metal to enter the gating system?

14) What process uses an expendable pattern which is coated several times in slurry and sand to make the mold?

15) What is the term for the component in a gating system that is used in most casting processes to o?set the e?ects of metal shrinkage during solidi?cation?

Explanation / Answer

1) casting defect

3)sand casting

4) high energy pump like centrifuge

5)Expendable-Mold Casting Process

6)Evaporative-pattern casting

7)Typically cast iron or Meehanite (a dense cast iron) is used as the mold material and the cores are made from metal or sand.

8)Hot Chamber Die Casting

9)

feeder or riser

10)Leidenfrost effect

11)Die casting

12)Casting, Forming, and Forging

13)sprue in metal casting

14)Casting

15)Modern Casting

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