Defects in lost foam casting reverse spray casting of steel castings
During the pouring process, due to the excessive amount of gas released by the thermal decomposition of the gas mold […]
During the pouring process, due to the excessive amount of gas released by the thermal decomposition of the gas mold […]
Main reasons: when the sand box is under vacuum, the external air is sucked into the mold due to the
Carburizing is one of the common casting defects in the lost foam casting process of steel castings. The carburizing casting
Lost Foam Casting (EPC), also known as negative pressure full mold casting, has developed to a considerable scale since it
Casting process refers to the process of pouring high-temperature liquid metal into the mold to obtain a certain shape of
Change the pouring position of the cylinder block and place the top surface of the lost foam casting of the
There are still many places that need to be supplemented and improved for the research on lost foam casting process
Import the three-dimensional modeling into ProCAST software in x-t format, repair the surface of the parts in mesh module, and
The lost foam casting process of cast steel butterfly valve body was studied and improved by numerical simulation, and ug8
1. Structural analysis of cylinder block The schematic diagram of a 12 cylinder block is shown in Figure 1. The
1. Vibration consistency test Take 18 positions on the sand box, and take 3 ~ 4 points at different heights
1. lost foam casting vibrating system ZHY casting adopts 20 ~ 40 mesh quartz sand and manual bag sand adding
(1) Simulation results and analysis of mold filling process Figure 1 (a) – (f) shows the change process of mold
(1) Simulation results of mold filling process Figure 1 (a) – (f) shows the change process of mold filling temperature
Lost foam casting technology has the advantages of wide application range, accurate size and shape of lost foam casting, smooth
The figure shows the solidification of cast steel valve body castings at different times. It can be seen from the
Role of lost foam casting coating in lost foam casting The function of lost foam casting coating is to support
For example, the liquid filling state of the casting at different times is represented. The red represents the molten metal
Lost foam casting is a kind of casting technology. There will be various casting defects in the casting process, which
The valve body lost foam casting process design produced by ZHY Casting refers to the process scheme of other similar
There are certain specifications and requirements for lost foam casting, and the following aspects should be paid attention to in
Lost foam castings have accurate size and shape, good repeatability and the characteristics of precision casting; The surface finish of
Lost Foam Casting Technology (EPC or LFC) is made of foam plastic, which is exactly the same as the structure
Equipment use This set of equipment and process integrates the advantages of solid mold and vacuum casting. It is suitable
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