(b) In casting experiments performed using a certain alloy and type of sand mould, for which n can be approximately taken as 2, it took 155 sec for a cube-shaped casting to solidify. The cube was 50 mm per side. (i) Determine the value of the mould constant in Chvorinov's rule. (ii) When the same alloy and mould type are used to make a cylindrical casting of diameter 30 mm, what is the maximum length of the cylinder if the maximum solidification time is limited to 1 minute?

Parvinbhai

A cast iron part with a square cross section is sand casted. Its length 14 in and the sides of the square cross section-2.5 in. If the mold constant in Chvorinov's rule - 3.6 min/in², how long, in minutes, will it take the casting to solidify?

a riser in the shape of a sphere is to be designed for a sand casting mold. the casting is a rectangular plate, with length 200mm, width 100mm, and thickness 18mm. if the total solidification time of the casting itself is known to be 3.5 mm, determine the diameter of the riser so that it will take 25% longer for the riser to solidify. assume a value of 2 for ‘n’ m( the exponent in chvorinov’s rule). know the volume and surface area of a sphere.

Answer this broadly.

EX.3//A cylindrical riser must be designed for a sand-casting mold. The casting itself is a steel rectangular plate with dimensions 7.5 cm x 12.5 cm x 2.0 cm. Previous observations have indicated that the total solidification time (TTs) for this casting =1.6 min. The cylinder for the riser will have a diameter-to-height ratio=1.0. Determine the dimensions of the riser so that its TTS = 2.0 min.

A disk-shaped part is cast out of aluminium with a diameter of 630 mm and a thickness of 16 mm. If the mold constant is 2.2 sec/mm2 in Chvorinov's rule, how long will it take the casting to solidify?

(1) In sand casting, the volumetric size of the pattern is: (a) bigger than, (b) the same as, or (c) smaller than the cast part (2) Machining processes include which of the following (two correct answers): (a) casting, (b) drilling, (c) extrusion, (d) forging, (e) shaping, (f), and painting? (3) Aluminum sections used for making metal doors and windows are made by which process: (a) Rolling, (b) welding, (c) extrusion, (d) turning. (4) The average flow stress is the flow stress multiplied by which of the following factors: (a) n, (b) (1-n), (c) 1/n, or (d) 1/(1+n), where n is the strain hardening exponent? (5) The strength of a brazed joint is typically (a) equal to, (b) stronger than, or (c) weaker than soldered joint? (6) Thread cutting operation is normally performed on which one of the following machine tools: (a) drill press, (b) lathe, (c) milling machine, (d) planer, or (e shaper?

I am in a hurry, I need the answer as soon as possible, please help.

A flat plate is to be cast in an open mold whose bottom has a square shape of 12.5 cm by 12.5 cm. The mold is 7.0 cm deep. A total of 350 cm³ of molten aluminum is poured into the mold. Solidification shrinkage is known to be 6.25%, which is a volumetric contraction, not a linear contraction. Table 7.1 lists the linear shrinkage due to thermal contraction after solidification. If the availability of molten metal in the mold allows the square shape of the cast plate to maintain its square dimension until solidification is completed, determine the final dimensions (width and height) of the plate.