The casting materials of the Industrial Belt Flexible Conveyor accessories are all cast with resin sand, equipped with a complete resin sand production line. The entire production process is pollution-free and environmentally friendly. It can eliminate or reduce casting defects such as trachoma, air and air. Let's learn about the production process. Parts casting should pay attention to the following points:
In the early stage of pouring, especially when the molten metal just contacts the foam, due to the large amount of gas generated by the vaporization of the pattern material, the static pressure head of the molten metal is smaller than that of the polystyrene decomposition product when the sprue is not full or when the pouring starts. When the gas pressure is high, pouring too fast is easy to cause choking and cause the molten metal to splash. In order to avoid this phenomenon, the method of trickling and slow pouring can be adopted at the beginning of pouring. After the pouring system is filled with molten metal, the pouring speed can be increased as fast as possible, but the pouring cup is filled with metal instead of metal. Spillover is the norm. In the later stage of pouring, when the molten metal reaches the top of the pattern or the root of the riser, it should be slightly closed to keep the metal rising smoothly and prevent the molten metal from rushing out of the riser.
When casting Industrial Belt Flexible Conveyor accessories, use primer packs whenever possible. The heat loss of the bottom pouring molten metal is small, the pressure head is large, the pouring speed is fast, the slag floats on the upper surface of the molten metal, and the pouring molten steel is relatively clean. Restricted by equipment conditions, subcontract pouring can also be used for some low-demand or general small and medium-sized machine tool castings. The pouring process cannot be interrupted. When pouring lost foam castings, the molten metal must be continuously injected until the mold is completely filled. Otherwise, it is easy to cause cold insulation defects on the entire plane of the casting at the standstill.
The purpose of tempering of Industrial Belt Flexible Conveyor castings has the following aspects:
Reduce brittleness and eliminate or reduce internal stress. After quenching, steel parts have great internal stress and brittleness. If they are not tempered in time, they will often deform or even crack. To obtain the required mechanical properties of the workpiece, the workpiece has high hardness and brittleness after quenching. In order to meet the different performance requirements of various workpieces, the hardness can be adjusted by appropriate tempering to reduce the brittleness and obtain the required toughness. plasticity. Stabilize the size of the workpiece. For some alloy steels that are difficult to soften after annealing, high temperature tempering is often used after quenching (or normalizing) to properly aggregate carbides in the steel and reduce the hardness to facilitate cutting.