By Robert Wilson
Contiuous casting of non-ferrous metals has been practiced for good over a hundred years. the method has many benefits over static ingot and e-book mold casting, an important being superior yield, lowered power intake and aid in manpower, with a consequent relief in expense. This booklet presents an account of ways non-stop casting has built and the way the method can be utilized inside of an engineering surroundings for casting a variety of copper-based alloys and necessary metals, together with gold and silver, and chosen nickel alloys.
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Extra info for A practical approach to continuous casting of copper-based alloys and precious metals
Corrective action can then be taken to diagnose the fault and re-start. When re-starting it is recommended that temperatures at Tl and T2 are sufficiently low to ensure 'freeze back' prior to removal of the broken section. It is necessary then to re-polish before re-inserting otherwise damage to the graphite cavity will occur. 2 Incorporating Safety Plunger at Die Exit A useful addition to 'rod break' safety is provided by incorporating a 'spring- or pressure-loaded plunger' at the die exit. This consists of a steel strip or metal section lightly loaded onto the edge of the cast strip or surface of the rod.
Q) ts overowell Q) o o T = t1+t2+t3 -c Time, seconds Fig. 19 Withdrawal sequence. extracting gear required to achieve displacement forces in the range 50 to 100 kN, it is necessary to ensure precise control under any operating conditions. 1. 1 Withdrawal Casting sequence. Control Function t 1 - acceleration t2 - pull time t3 - deceleration is the time from rest to reach full motor speed is the time taken to cover a pre-set pulse length (P) is the time from the end of the pulse plateau to rest and is same as t, represents the time t, + t2 + t3 which is the total time for 1 pulse displacement is the length in mm travelled in time (1) and is variable is the dwell period between cycles.
It is appropriate to commence our 'hands on' exercise with detailed study of die and cooler put together and fit to the casting crucible. S-mm-diameter rod. The essential features of the die are: (1) Graphite used must be of a grade to suit the specific application. (2) Precise machining to meet dimension requirements of the cast product. 24 Continuous Casting (3) (4) (5) (6) Machine On strip Equally Interface finish on the casting surface is of paramount importance. dies ground finish is necessary.