Effect of pouring temperature on mold filling speed of gray cast iron lost foam casting
The test results are shown in the table: Pouring temperature (℃) Total mold filling time (s) Average filling speed (cm/s) […]
The test results are shown in the table: Pouring temperature (℃) Total mold filling time (s) Average filling speed (cm/s) […]
In terms of lost foam casting for mass production, it can be divided into two categories according to the current
Lost foam casting coating is different from traditional sand mold coating. The surface of lost foam castings is the inner
In Britain, the earliest application of lost foam casting is the British cast steel research and Trade Association, whose method
Japan has used this method to produce large castings since the 1960s, such as Kobe iron Institute, which is still
The coating raw material lost foam casting coating is composed of refractory, binder, carrier, suspending agent and special additives such
The United States was the first country to apply the lost foam casting method and was the first to carry
The theoretical research of lost foam casting started late. In the 1950s and 1960s, some research was carried out on
Lost foam casting has outstanding advantages, which has attracted more and more attention of foundry workers in recent years. Lost
The selection of negative pressure degree is particularly critical in vacuum negative pressure lost foam casting. A large number of
Lost foam casting molding is completed by model disappearance, decomposition products escaping from the mold, and liquid metal replacement model.
Lost foam casting method was first successfully tested by American h.f.shroyer in 1956, and was published in the form of
On the whole, China’s technology is still at a low level. There is still a big gap between China and
Foamed plastic plays a very important role in lost foam casting, and its quality will directly affect the quality of
The “white zone” technology and equipment of China’s lost foam casting is the weakest link, mainly including the following: Development
The lost foam casting method takes foamed plastic expandable foam polystyrene or polymethylmethacrylate as the model, and applies fire-resistant coating
Insufficient attention to the basic research work of lost foam casting technology, too little investment and low level have become
Puqiao company of the French group obtained the patent of EPC isostatic pressing process, and used this process to organize
As early as the late 1970s, China has studied the application of lost foam casting in mass production, which is
Foundry, a traditional industry with a civilization history of 6000 years in China, is increasingly facing the challenges of the
Based on the existing working conditions of the factory (sand box size, sprue specification, ladle specification, automatic pouring line, etc.),
1. Production conditions of Lost Foam Casting Thin-wall gray cast iron gearbox shell The production conditions and parameters of Lost
1) The lost foam casting process of nodular iron shell with relatively complex shape is successfully analyzed by ProCAST software,
Through the analysis of the problems in the actual production of the original lost foam casting process and the ProCAST
The numerical simulation of lost foam casting filling process is shown in the figure. The whole filling process is stable
The internal shrinkage porosity and shrinkage cavity of the casting produced by the original lost foam casting process is relatively
Whether the selection of mathematical model is reasonable or not directly imagines the accuracy of the whole simulation process, which
Some studies have pointed out that the cross-sectional area of each component of lost foam casting gating system, the size
The casting temperature of lost foam casting not only determines the type and quantity of the decomposition products of foam
In the process of lost foam casting pouring, vacuum the sealed sand box to generate negative pressure in the mold,