Ch. 4 Gating sytems

Question 1

4 main points of the Gating System

Answer 1

Clean molten metal, Smooth filling of the casting cavity.
Uniform filling of the casting cavity.
Complete filling of the casting cavity.

Question 2

Types of gating system

Answer 2

Horizontal( normal for what we are doing). Vertical for tall castings

Question 3

Order of gating system

Answer 3

Pouring basin, spruce, runnerbar, runner extension, ingates, core, back to runner, riser to remove impurities

Question 4

Gating ratio

Answer 4

The the andthe between the cross andsectional area of the sprue vs area of runner vs cra of gating sytem.

Question 5

biggest difference between pressurized gating and non pressurized gating.

Answer 5

the smallest cross-sectional area is the Gating system for pressurized . bottom of spruefor non- pressurized

Question 6

How much should runner’s width be blank times the runner’s height or depth?

Answer 6

twice as much

Question 7

Pouring Basin

Answer 7

a reservoir where the molten metal enters into the gating system. should be made deep enough to prevent turbulence.

Question 8

Runner Bar

Answer 8

A channel that connects from the sprue to the runner extension letting the metal enter the mold cavity

Question 9

Runner Extension

Answer 9

from the runner bar used to trap and remove some of the impurities from the metal.

Question 10

Ingates

Answer 10

openings through which molten metal enters the mold cavity.

Question 11

how should ingates be made

Answer 11

made so that metal enters quickly into the mold cavity

Question 12

gaitng sytem

Answer 12

as smooth as possible to prevent turbulance

Question 13

Sprue well should have

Answer 13

smooth holes to better allow for better flow

Question 14

What determines fluidlility

Answer 14

Narrow freezing range.

Question 15

Yield

Answer 15

Metal of final casting/ weight of metal poured x 100