Test materials and methods for water-based lost foam casting coatings for cast iron
1. Water based lost foam casting coating test materials Bauxite: the main mineral composition is mullite, which has the advantages […]
1. Water based lost foam casting coating test materials Bauxite: the main mineral composition is mullite, which has the advantages […]
The fire-resistant coating for lost foam casting includes refractory aggregate, carrier (solvent), suspending agent, binder and other additives. ① Refractory
Lost foam casting technology is known as “casting technology in the 21st century” and “green revolution of casting industry”, which
At present, the main body of lost foam castings in China is cast iron, cast steel and other alloys, and
One layer of refractory coating hung on the outer surface of the foam plastic model is one of the three
According to the previous experimental analysis, the next plan is proposed: accelerate the discharge of carbon in the white mold
In recent decades, with the continuous development and progress of computer CAD / CAM / CAE technology, lost foam casting
Lost foam casting is a green casting method with the characteristics of cleaner production. The white mold pattern with the
After more than half a century of vigorous promotion and rapid development, lost foam casting technology has gradually entered a
The process flow of lost foam casting is divided into white area and black area. (1) The process of lost
At the initial stage of trial production, zg27simn (carbon content 0.24 ~ 0.32%) was taken as the experimental sample to
1. Determination of structural characteristics and blank size of lost foam Castings Figure 1 shows the shell model of Large
The traditional sand casting method is generally used in the production of cast iron water meter, which has complex process,
1. Advantages of lost foam casting ① When using polystyrene foam in white mold manufacture, its density is very small,
Lost foam casting process technology, usually referred to as EPC, is also called gasification mold casting or full mold casting
There are more than 30 large-scale casting production enterprises in China, most of which are large and medium-sized state-owned enterprises.
In view of the problems of high pouring temperature and easy decay of inoculant in lost foam Castings, it is
The flywheel housing is placed vertically in the lost foam casting sand box (as shown in Fig. 1), and there
1. Improve the stiffness and strength of lost foam casting sand box The bottom of lost foam casting sand box
Lost foam casting is a green casting method with the characteristics of cleaner production. The white mold pattern with the
In order to verify the correctness of defect cause analysis, the project team carried out process verification test. The test
1.Current process Due to the serious slag inclusion problem, the white mold material is replaced by stmma, the specific gravity
Lost foam casting technology is widely used in the foundry industry because of its advantages of small investment, low energy
The solidification process of liquid metal is divided into three phases: liquid phase, solid / liquid phase coexistence and solid
In the solidification process, because of the wide range of crystallization temperature, the basic metal skeleton is formed first when
Geometric modeling The heat transfer between the liquid metal and the pattern occurs during the filling process Where, ρ P
Crawler shoe is the key component of roadheader walking mechanism, which is connected by pin to form crawler shoe chain.
① Because the preparatory work in the early stage of production is not in place, the theoretical negative pressure value
(1) When using polystyrene foam in white mold manufacture, its density is very small, and the labor intensity of the
The refractory coating for lost foam casting consists of refractory aggregate, carrier (solvent), suspending agent, binder and other additives. ①