The large cast iron platform resin and curing agent are controlled by a dosing pump according to the required ratio. The use of the stick road and the transition modeling trolley can expand the modeling space, and the vibrating platform is installed in the stick road under the sand mixer, which can increase the compactness of the sand mold, and improve the large cast iron platform According to the small casting workshop product variety small batch or single piece production point, the molding system should mainly adopt manual modeling, and do not need to form a mechanized assembly line.
Large cast iron platform for vertical conveying with optional bucket elevator. In the conveying process, it is necessary to set up dust removal equipment for forced ash removal. The sand warehouse can be used for old things, if the new system can be used conical sand storage, the inclination angle of the sand warehouse should be greater than 60 °, to capacity. In the production of resin sand on large cast iron platforms, there are several main aspects of dust: dust formed after the cauterization of the resin film, and powder formed after the cauterization of the paint. The dust formed by adding belts to the raw sand of the large cast iron platform and crushing the sand particles. Therefore, it is required that the dust removal equipment must not only have sufficient air volume, but also require appropriate negative pressure.
Mold-sticking solution for large-scale cast iron platform: check whether the mold temperature is normal, and moderately reduce the alloy liquid pouring temperature and mold temperature of the large-scale cast iron platform. Check whether the mold release agent ratio is abnormal, and try to change the release agent. The surface of the large-scale cast iron platform is polished at the debugging and spraying position, and the mold that has been nitrided is carefully polished
The design of the sand mixing molding system of the large cast iron platform: the correct selection of sand mixing equipment has a great impact on the performance of resin sand, and the requirements for the sand mixer are quantitative and accurate, uniform mixing and rolling, good film covering effect, and the quality and price of the large cast iron platform equipment should also be considered. At present, the most commonly used resin sand mixer is divided into batch type and continuous type. According to the output of the small workshop of the large cast iron platform, the 5 10t h cantilever continuous resin sand mixer can be selected. If the core amount is large, it can be equipped with a batch sand mixer to mix core sand. The sand enters the sand mixer from the storage hopper through the screw feeder
Large-scale cast iron platform production process: large-scale cast iron platform spheroidization treatment, heavy soil magnesium nodularizing agent can improve the roundness of graphite sprite compared with light soil magnesium nodularizing agent, mainly because of strong ability, light soil magnesium spherical range control is good, and supplemented by trace elements, can also improve graphite spherical roundness. The flushing method is better than the quality of molten iron by the subcontracting method, so it can also improve the roundness of graphite balls. Inoculation treatment: Intensive inoculation can improve the roundness of graphite balls, the use of feeder can improve the roundness of graphite balls, and the formation of passivated graphite cores similar to the diffusion phase of non-dissolved graphite when using ductile iron filings for spheroidization treatment can produce long-term concentration fluctuations, greatly increase the nucleation rate, and improve the roundness of graphite balls. Try to improve the roundness of graphite balls.
Install a dusting equipment with adjustable wind power at the outlet of the large cast iron platform bucket elevator for air separation. The large cast iron platform alcohol-based paint is sprayed or brushed on the resin sand mold, and then ignited to achieve surface drying, and the application and drying process can be completed in a few minutes, and the production cycle is short. The variety and batch size, purchase or flow coating machine.
The resin sand shakeout equipment of the large cast iron platform should meet the quality requirements of the sand: if the powder content is high, the amount of resin added should be high, so that the strength of the resin sand will be reduced. In order to reduce the content of fine powder, the dust removal system is generally configured to take the measure of forced ash removal. The small amount of burning reduction is the main factor that leads to the porosity and other problems of large cast iron platforms, and the general burning reduction of iron castings is controlled at less than 30。The sand temperature determines the hardening speed of the sand mold, and it is decided whether to configure the sand temperature adjustment equipment according to the production cycle. If continuous production, 2 3 days to open a furnace, can not be equipped with sand temperature, the main sand removal equipment is the vibration of the sand shake machine, ceiling level snow play