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Pouring system for slag-control purification of cross gates and design method of system

A pouring system and design method technology, applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve problems such as difficult to ensure smooth filling of molten metal, unreasonable pouring system, etc., to achieve stable pouring speed and prevent erosion Effect

Inactive Publication Date: 2020-04-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a gating system and its design method for slag control and purification of the runner, so as to solve the unreasonable gating system in the factory and the difficulty in ensuring the smooth filling and purity of molten metal. etc.

Method used

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  • Pouring system for slag-control purification of cross gates and design method of system
  • Pouring system for slag-control purification of cross gates and design method of system
  • Pouring system for slag-control purification of cross gates and design method of system

Examples

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Embodiment 1

[0055] A certain type of machine tool bed is poured, the pouring material is HT250, the pouring temperature is 1360°C, and the weight of the casting is 10t. The size of the cross-sectional area is Φ55mm, and the height of sprue 1 is 1650mm. The design principle is the principle of equal flow rate. The design of the upper part and the lower part is conducive to the floating of gas and inclusions to the top, and at the same time, it can avoid the erosion of the molten metal on the sprue.

[0056] As shown in Figure 3, Figure 5 As shown, the corner of the sprue 1 and the first row of runners 3-1 adopts an arc bend 2 for transition, the radius of the arc bend 2 is 80mm, and the equivalent diameter of the first row of runners 3-1 is 60mm , The cross-sectional area of ​​the arc bend 2 is designed to be variable in diameter, and the diameter changes between 55 mm to 90 mm to avoid negative pressure at the corner and cause entrainment. It can be seen that the present invention is dif...

Embodiment 2

[0061] A certain type of machine tool bed is poured, the pouring material is HT250, the pouring temperature is 1370°C, and the weight of the casting is 5t. The size is Φ50mm, and the height of the sprue 1 is 1000mm. The design principle is the principle of equal flow rate. The design of the upper part and the lower part is conducive to the gas and inclusions floating to the top, and at the same time, it can avoid the erosion of the molten metal on the sprue 1.

[0062] As shown in Figure 2, Image 6 As shown, the corner of the sprue 1 and the first row of runners 3-1 adopts an arc bend 2 for transition, the radius of the arc bend 2 is 80mm, and the equivalent diameter of the first row of runners 3-1 is 60mm , The cross-sectional area of ​​the arc bend 2 is designed to be variable in diameter, and the diameter changes between 55 mm to 90 mm to avoid negative pressure at the corner and cause entrainment. It can be seen that the present invention is different from the prior art. ...

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Abstract

The invention relates to the field of pouring systems in the casting process, in particular to a pouring system for slag-control purification of cross gates and a design method of the system. The method comprises the steps that 1) two or more rows of cross gates are designed side by side, and the cross gates are circular or trapezoid or rectangular; 2) the area of the cross sections of two or morerows of cross gates remains the same or is gradually reduced, and the number of the cross gates is 2-4; 3) the lower portions of the side faces of the cross gates are connected through ingates, the ratio of the sum of the area of the cross sections of the ingates to the area of the cross sections of the cross gates is (1-5):1, and the area of the cross section of a single ingate accounts for (1 / 3)-1 of the area of the cross sections of the cross gates; 4) filter areas are designed at outlets of the cross gates, small-size impurities are controlled, the pouring speed is stabilized, and the situation that since molten metal spatters, flushing is caused is avoided. Therefore, the problem is solved that currently, in a factory, a pouring system is unreasonable, and stable mold filling, purityand the like of the molten metal are difficultly guaranteed.

Description

technical field [0001] The present invention relates to the field of gating system in the casting process, in particular to a gating system and its design method for slag control and purification of runners, which are generally applicable to sand casting and metal casting of non-ferrous metals, ferrous metals, superalloys, etc. , casting slab pouring and gating system design for 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 sprue, runn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08
CPCB22C9/082B22C9/086
Inventor 傅排先王雪东康秀红夏立军李殿中
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI