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Design method and system for no air gap stable filling casting

A pouring system and stable mold filling technology, applied in casting molding equipment, molds, cores, etc., can solve the problems of easy scouring of molds, excessive metal flow rate, air entrainment, etc., to improve performance and service life, The effect of improving process yield and reducing design size

Inactive Publication Date: 2004-12-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

The cross-sectional area of ​​the sprue, runner, and ingate of the closed gating system gradually decreases, the flow rate of the molten metal is too fast, the turbulence is severe, and it is easy to wash the mold, causing air entrainment and inclusion defects (X-ray observation shows that the full When the type velocity is greater than 0.5m / s, it is easy to cause turbulence and air entrainment defects)

Method used

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  • Design method and system for no air gap stable filling casting
  • Design method and system for no air gap stable filling casting
  • Design method and system for no air gap stable filling casting

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Embodiment 1

[0019] Take the large-scale integral casting cast steel backup roll as an example, the material is 40Cr4, the weight of molten steel is 50t, the filling time is 7-8min, and the pouring temperature is 1550°C.

[0020] Such as Figure 4 As shown, the casting pouring method and system structure of the present invention are as follows: 1) Design the sprue cup according to the principle of smooth filling. A boss-type steady flow platform 48 is designed at the outlet end of the sprue cup, so that the molten metal does not splash during the filling process. The inner opening of the gate of the sprue cup is connected with a stopper system. When the molten metal is filled to 2 / 3 of the height of the sprue cup, the stopper system is opened, which is beneficial to the removal of oxidized inclusions during the filling process, and is also beneficial to the metal The liquid filling type is stable. 2) Adopt a streamlined sprue structure with a large top and a small bottom, and it is embod...

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Abstract

A method for designing the non-air-gap smooth-filling casting features controlling the filling smoothness, lowering the filling speed, preventing air and oxidized film from coming in molten metal, reducing the size of pouring channel, and increasing the technological output rate. Its casting system has a pouring cup, a plug rod system connected with said pouring cup and opened when filled molten metal in the pouring cup reaches its 1 / 2-1 / 3 height, and the arc corner between vertical and horizontal pouring channels. Its pouring speed is 0.5-1.0 m / s.

Description

technical field [0001] The present invention relates to the pouring system design of the casting process, in particular to a design method of the pouring system without air gap and stable mold filling and the pouring system used, which can be generally applied to the sand casting of nonferrous metals, ferrous metals, high temperature alloys, metal Gating system design for mold casting and precision casting. Background technique [0002] Traditional gating system design is usually closed (pressurized) and open (unpressurized) two methods. The cross-sectional area of ​​the sprue, runner, and ingate of the closed gating system gradually decreases, the flow rate of the molten metal is too fast, the turbulence is severe, and it is easy to wash the mold, causing air entrainment and inclusion defects (X-ray observation shows that the full When the type velocity is greater than 0.5m / s, it is easy to cause turbulence and air entrainment defects). The cross-sectional area of ​​the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08
Inventor 李殿中夏立军康秀红李强柯伟李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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