Influence of mold filling on casting defects in lost foam casting
The pin holes, slag inclusion defects of cast aluminum parts, wrinkle of iron castings, carbon defects of steel castings, and […]
The pin holes, slag inclusion defects of cast aluminum parts, wrinkle of iron castings, carbon defects of steel castings, and […]
Type Stand alone or simple Generally, 1-2 three-dimensional shaking tables (for molding) and several to more than 10 special sand
The main difference between lost foam casting and other castings is that the pattern remains in the mold. When the
In lost foam casting, under normal circumstances, there are many factors affecting the dimensional accuracy of casting, such as the
In recent years, lost foam casting has developed rapidly in China, and the development results are also gratifying. Among them,
In 1958, H.F.shroyer of the United States invented patent technology for making metal castings by using foamed plastic pattern and
Due to the structural characteristics of the axle housing, the spiral case opening can only be placed upward and horizontally.
Lost foam casting process includes riser system design, pouring temperature control, pouring operation control, negative pressure control and so on.
The introduction of lost foam casting process by some manufacturers is not cautious and scientific enough, lack of in-depth understanding
In recent years, lost foam casting has developed rapidly in China, and the development results are also gratifying. Among them,
Lost Foam Casting (also called real mold casting) is a new type of casting method that combines the wax or
Bucket teeth are the main vulnerable parts of the open pit excavator. The casting has a unit weight of 130kg,
1. Pattern making The quality of pattern is one of the keys to the success or failure of lost foam
Lost foam casting technology is made of polystyrene foam through the foaming process and the shape of the needed castings.
In the research of numerical simulation of lost foam casting, Wang et al. Analyzed the mold filling process of aluminum
After nearly half a century of development, lost foam casting technology has gradually entered a mature stage. Its products have
In recent years, with the development of casting numerical simulation technology, there are many research results in traditional pressure casting
Lost foam casting numerical simulation technology has become a powerful simulation and simulation technology, and goes deep into all aspects
1) Because of the complex physical and chemical reaction between the front of the molten metal and the foam pattern
The change of field in each stage of lost foam casting forming process is calculated accurately, so as to obtain
It mainly studies the lost foam casting of gearbox box, first carries out three-dimensional modeling, then carries out linear repair,
In the study of lost foam casting process, the process parameters that have a great impact on the quality of
Figure 1 and Figure 2 show HT250 and HT200 gray cast iron respectively Φ The matrix structure of 30mm test
At the front of the lost foam casting filling mold, due to the reaction of metal liquid and foam, the
Figure 1 and Figure 2 show the graphite structure of HT250 and HT200 gray cast iron under the conditions of
The research on filling shape and filling speed not only has an important impact on the establishment of numerical simulation
Lost foam casting can also be called negative pressure or dry sand casting, because its characteristic is to use negative
ProCAST is a professional computer simulation software for optimizing lost foam casting process. We can use ProCAST simulation software to
In recent years, due to the development and application of various precision molding technologies, the casting process simulation technology has
1. Sample preparation According to the requirements of GB / t9439-2010 lost foam casting gray iron castings, it is used