Lost foam casting Name: 105 type cable head; Material: ZG310-570; Geometric dimension: 620 mm × 290 mm × 210 mm； Single piece weight 107 kg; The wall thickness is uniform 50 mm, bridge steel cable suspension device and security parts; The material must meet the drawing requirements, the mechanical properties must meet the standards, and there shall be no lost foam casting defects in NDT.
The shell casting process of lost foam casting has cleaned the foam thoroughly and thoroughly through the roasting process before pouring liquid metal. Therefore, it thoroughly eliminated the unfriendly influence and trouble caused by the foam mold in the liquid metal forming process.
The shell casting always on tenterhooks, without sand or sand, and under negative pressure, keeps all the advantages of lost foam casting, but it does not need to be very careful about the carbon defects of the foam. The ingenuity of the shell casting process is that the majority of the foam die is heated to the liquid outflow cavity instead of the gasification combustion, so as to avoid a large amount of smoke and dust and cause environmental pollution. In the process of shell roasting, not only the foam model is completely removed, but also the source of carbon defects is eliminated. Moreover, the crystal water of refractory aggregate of coating shell is completely removed during empty shell roasting, and the source of defects such as pores and hydrogen increase is eradicated; Therefore, it can be said with confidence that ‘Lost Foam Casting empty shell pouring process’ is the only process with few hidden dangers of casting defects among all casting processes. As long as the pouring liquid steel is pure and the feeding of the pouring riser is sufficient, the occurrence of casting defects can be avoided.
In the past, it was far fetched to say that lost foam casting belongs to the category of precision casting, and the empty shell pouring process is genuine precision casting! Empty shell casting technology can be used for large and complex precision castings, which is beyond the reach of traditional precision casting; The empty shell casting process has good working environment, simple shell making and short cycle. It is also a wonder of the traditional precision casting.
Compared with other casting processes such as resin sand, sodium silicate sand and V-method casting, the lost foam shell casting process is not afraid of complex cavity, flexible model segmentation, no draft angle, random placement in the box, no need to lower the core, no need to clean the flash and burr, and the obtained lost foam casting has smooth surface, clear outline and accurate size The advantages of good looks are not comparable to other traditional crafts.
From a commercial point of view, the empty shell casting process is particularly suitable for high-end high value-added castings of low-carbon or zero carbon, ultra complex or ultra-thin, multi alloy or high alloy.