Gating system design, Other Engineering

A gating system is usually made up of :

                        (i) Pouring basin                 

                        (ii) Sprue well

                        (iii) Runner                           

                        (iv) Flow-off gate

Basic requirements expected from a gating system are to minimize turbulence and the aspiration of air and gases, to avoid dross formation to decrease the velocity of metal. So as to minimize mould erosion, to avoid premature freezing of metal and assist in developing proper temperature gradient.

            The are of sprue base                    

                        As = Ra(d√2gH)

           where

                        R = Adjusted pouring rate, d = density of molten metal

                        H = Sprue height

             Here   Ra =    R         R = Pouring rate

                               R.C         

 

                                                            K = Metal fluidity

                                                            C = Friction coefficient

            The pouring rate R for ferrous metals and copper base alloys is given by the empirical formula

 

                        R = (w)P

                           (0.95+t/0.853)                W = Weight of casting

                                                                         t = Critical casting thickness

            and P a quotient whole value depends upon the weight of the casting.

The value of P for different castings is as given:

                                    Weight of Casting                                                  Value of P    

                                          Up to 500 Kg                                                            0.50

                                       500 - 5000 Kg                                                     0.67

                                    5000 - 15000 Kg                                                     0.70

            For light metal castings : R = b w

Where the value of b relies on the wall thickness

                                    Weight of Casting                                                  Value of P

                                           Below 6 mm                                                            1.48

                                  6 - 12 mm                                                              1.25

                                  Above 12 mm                                                          0.70

Posted Date: 8/3/2012 1:28:30 AM | Location : United States







Related Discussions:- Gating system design, Assignment Help, Ask Question on Gating system design, Get Answer, Expert's Help, Gating system design Discussions

Write discussion on Gating system design
Your posts are moderated
Related Questions
Ask question #Minimum lkjhbi mbj jhb uy 100 words accepted#


Changes in temperature and pressure: The changes in temperature and pressure of the gases through a gas turbine engine are illustrated in Figure 1.5 The efficiency with which t

the amount of cold working metal can withstand is directly related to which properties? name two and also discuss the effect that cold working has upon these properties?

Casting means the pouring of molten metal into a mould, where solidification occurs. Advantages of Casting Process          (i) It is the cheapest method of fabrication.

How do comets get their tails? - Most comets stay frozen in the outer solar system. Only a few enter the inner solar system where they can grow tails. - When a comet nears the sun

Depreciation Calculation Two most popular methods of charging depreciation are: straight line and diminishing balance or written-down value (WDV) methods. For reporting to the sha


analysis the wien bridge oscillator practical?

Question 1 What is Artificial Intelligence? Discuss the two class of approaches followed for AI Question 2 Discuss the heuristic search as applied to an AND/OR Graph Ques