Optimization of gating system in lost foam casting of gray cast iron thin wall gearbox shell
The lost foam casting thin-walled gray cast iron gearbox shell casting with the improved gating system is adopted. The qualification […]
The lost foam casting thin-walled gray cast iron gearbox shell casting with the improved gating system is adopted. The qualification […]
Lost foam casting has the advantages of high dimensional accuracy, smooth surface and less pollution. Compared with the traditional molding
Flywheel is a part of engine components. Its product surface is fully processed. The dynamic balance test of parts. Although
Under the same production conditions, the process yield and scrap rate of three different casting process schemes were obtained. Scheme
Using proe software for three-dimensional modeling and ProCAST software as simulation analysis means, the casting process of ductile iron shell
The change diagram of critical solid rate during solidification of lost foam castings is shown in Figure 1. It can
Compared with ordinary sand casting, the solidification characteristics of lost foam casting are also different, mainly in the following aspects:
Using proe software for three-dimensional modeling and ProCAST software as simulation analysis means, the casting process of ductile iron shell
In recent years, there are four hot spots in the research of lost foam casting technology in Europe and North
1. Foam casting for lost foam casting The molding of polystyrene bead mold can increase the foam density for improving
The figure shows the hardness of ZGMn13 and zgmn17 under different water toughening treatments. It can be seen that the
The combination process of lost foam casting nodular cast iron reducer shell is shown in the figure. The design process
According to the numerical simulation of turbine rear exhaust pipe in lost foam casting, under the existing process conditions, due
1.Selection and implementation method of inoculant Aiming at the problems of high pouring temperature and easy decay of inoculant in
The low spheroidizing grade of lost foam casting nodular cast iron is mainly caused by high spheroidizing temperature (due to
1. Improve the stiffness and strength of lost foam casting sand box The bottom of lost foam casting sand box
Lost foam casting requires that the molding sand can fill the mold space tightly during molding. Therefore, the vibrating system
As the core component of the engine, the cylinder block has complex structure, high precision requirements and difficult forming. lost
According to the simulation results of lost foam casting defects of cast steel valve body and the comprehensive analysis of
Fig. 1 and Fig. 2 are respectively solidification time nephogram and solid rate change diagram of ZY direction section plane
According to the analysis of the original process scheme of the valve body, it can be seen that the improper
Figure 1 shows the distribution of shrinkage cavity and porosity predicted by numerical simulation technology under the original process scheme.
Lost mold casting has experienced the following three stages of development: The first stage is the American H.F. Sloy (Shroyer)
ZHY casting adopts 20 ~ 40 mesh quartz sand and manual bag sand adding method. The size of sand box
Lost foam casting requires that the molding sand can fill the mold space tightly during molding. Therefore, the vibrating system
Introduction 1. Lost foam casting process The lost foam casting process is simple, without complex processes such as core making,
In order to ensure that there is no dead corner in the negative pressure inside the sand box, 5 air
Lost foam casting is a negative pressure full mold casting technology developed on the basis of vacuum sealing molding combined
Axle housing is one of the main components of engineering vehicles, which carries the strong force of transmission and load.
Lost foam casting process is a casting process in which EPS white mold models similar to the size and shape