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Cheap Aluminium Oxide Grit 24 Mesh Saudi Arabia

It is easy to involve the foam pattern and the decomposition products in the metal liquid(also applicable to aluminum castings). There are usually no cross sprues(aluminum oxide abrasive media), only the straight runner and the inner runner to shorten the metal flow distance. The above pouring methods can produce qualified castings under certain conditions(garnet sand). The principles of gating system used for sprue proportion and introduction position are as follows.


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On the one hand, the time of forming the continuous covering layer on the surface of the wetting coating on the liquid product is reduced(aluminum oxide blasting abrasive), resulting in a larger back pressure on the gaseous product being difficult to discharge, and on the other hand, the resistance of the metal flow at the wall of the mold and the heat transfer resistance between the metal foam mold interface are increased(white corundum sand), simplify the casting process and reduce the cost. 


(cheap aluminium oxide grit 24 mesh saudi arabia)What fire is the liquid metal from the sprue reverse spray, hollow sprue and bottom injection are conducive to avoid reverse spray(aluminum oxide 180 grit blast media). The casting technology of the part structure means that the structure of the part should meet the requirements of the lost foam casting production, which is easy to ensure the casting quality(chrome alumina). At this time, increasing vacuum has little effect on filling time and flow pattern of molten metal.


The gating system of lost foam casting (EPC) is that the alloy liquid is directly introduced into the mold cavity(white alumina powder). The influence of gating system on EPC mold filling process, the flow front always moves forward in radial arc shape with inner runner as the center(calcined alumina). Compared with the side pouring, the flow shape of the front edge of liquid metal is symmetrical along the center of the pattern in the top and bottom filling.(cheap aluminium oxide grit 24 mesh saudi arabia)


The complex structure forms (such as centrifugal type, stop flow type, ox horn type, etc.) are not considered, and the composition of gating system is reduced as far as possible(aluminium oxide sandblasting). The shape is simple, square and rectangular. The distance between the sprue and the casting (i.e. the length of the ingate) should ensure that the mold will not deform due to the increase of temperature during the filling process(abrasive garnet sand). quantity of heat.


(cheap aluminium oxide grit 24 mesh saudi arabia)The form of gating system is different from that of traditional technology(corundum abrasive). The white mold gating system (straight, horizontal and inner runner) and connecting casting in sand mold must be melted, cracked, decomposed and vaporized, and the whole vacancy is allowed to be injected into the alloy(abrasive blast media). High sprue (high head) is easy to form good castings and ensure safety during pouring (especially for EPS / EPMMA copolymer resin pattern).


The velocity, temperature (temperature and thermal field distribution) of the alloy liquid entering into the mold cavity directly affect the casting quality(white aluminum oxide 120 grit). Therefore, in addition to following the principles of sand casting and investment casting, the following factors should be considered in the design of EPC gating system(alumina suppliers). The metal pressure head should exceed the gas pressure of metal EPS interface to prevent choking.(cheap aluminium oxide grit 24 mesh saudi arabia)


In general, the pouring temperature of alloy liquid is 30 ~ 50 ℃ higher than that of sand mold casting(180 grit aluminum oxide blasting media), and the casting temperature of Jiang wall parts is increased to 80 ℃, so that it has enough heat to melt all the white mold. Taking the high manganese steel pouring sieve plate with high manganese steel as an example(sponge media abrasive), the pouring temperature of 50 ℃ is increased and the pouring temperature of 1500 ℃ is increased.


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