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gated pattern is used to produce good casting it is essential to make sure that full supply of molten metal flow into every part of the mould
match plate patterns are used where a rapid production of small and accurate castings is desired on a large scale these patterns find a great favour
1 generally moulding sands can be classified as a natural
the commonly used moulding materials for mould making can be broadly classified into the following two groups
material used for patterns the common materials of which the patterns are made of the following 1 wood
casting alloys are - i permanent moulds are commonly used for the casting of grey iron aluminum alloys
inspection of casting visual inspection inspection for dimensional accuracy
the cupola is the most widely used furnace in the foundry for melting ferrous and non ferrous metals and alloysvarious zones of
special casting methods 1 die casting die casting is a permanent mould casting techniques in which
casting means the pouring of molten metal into a mould where solidification occursadvantages of casting process i it
a riser or a feeder head is a passage of sand made in the cope to permit the molten metal to rise above the highest point in the casting after the
a gating system is usually made up of i pouring
design of casting the important factors to keep in mind when designing a casting to obtain maximum strength and minimum casting includes
shell-mould casting is variant of the resin bonded sand technique for casting steel iron or non-ferrous alloysthe mould is made by a mixture of fine
sand castings are porous enough and therefore cannot be used for pressure sight vessels structure obtained by sand casting is loose and hence not
allowances for pattern a pattern is always made larger than the required size of the casting in order to allow for various factor such as shrinkage
types of patterns these depends upon many factors like the bulk of casting type of moulding processes number of castings required and the
pattern practices a pattern may be defined as a replica or fascimile model of the desired casting which when packed or embedded in a appropriate
survey of manufacturing a usable product is manufactured in the following sequenceore from earth rarr reducing processes rarr molten metal rarr
economic definition manufacturing increase the value of producttechnological definition manufacturing is a process which gives required
q explain the grain growthans grain growth after recrystallization is complete the strain free grains will continue to grow if the metal specimen is
q what is slip what is slip plane what are principal if slip planes and slip direction for bcc fcc and hcp crystalans x-ray diffraction studies show
q explain various stages of creepans creep creep can be defined as the process by which plastic flow occurs when a constant stress or load is applied
q discuss the role of precipitate particles strengthening crystalline materials against yield as low as well as high temperature of deformationans
q describe the four main methods of strengthen crystalline materials against plastic yieldans 1 work hardening strain hardening or work hardening is