Molten metal purification device for casting
A purification device and molten metal technology, applied to casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of unstable filling speed, high casting manufacturing cost, and difficult molding, so as to improve labor productivity and reduce Casting cost, easy to use and operate
Active Publication Date: 2015-03-25
SHENYANG MACHINE TOOL YINFENG FOUNDRY
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
This method has many disadvantages, including the gating system is more complicated, the molding is difficult; , subject to the large impact force of molten metal and high-temperature corrosion, it is easy to break and break, and a large number of broken fragments enter the cavity of the casting with the molten metal, bringing secondary inclusions, further increasing the inclusions, and directly leading to the scrapping of the casting; Use filter screen or filter cloth to filter, which is not easy to operate, low labor productivity and high casting manufacturing cost
Method used
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Examples
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Effect test
Embodiment 1
[0016] Example 1, for castings with a weight of M<500kg, the height of the choke core and the front area of the inner runner of the device of the present invention: H1=40-50mm, H2=35-45mm, H3=2-4mm; the length of the front and rear areas of the inner runner : L1=45~60mm, L2=5~10mm, L3=35~45mm.
Embodiment 2
[0017] Example 2, for castings with a weight of 500kg≤M<10000kg, the height of the choke core and the front area of the inner runner: H1=50-60mm, H2=45-55mm, H3=4-8mm; the length of the front and rear areas of the inner runner: L1=65~80mm, L2=10~15mm, L3=45~60mm.
Embodiment 3
[0018] Example 3, for castings with a weight of 10000kg≤M<100000kg, the height of the choke core and the front area of the inner runner: H1=60-80mm, H2=55-75mm, H3=8-12mm; the length of the front and rear areas of the inner runner: L1 =85~90mm, L2=15~20mm, L3=60~80mm.
[0019] The invention is applicable to sand casting techniques of all specifications and materials.
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The invention relates to a molten metal purification device for casting. The molten metal purification device comprises a runner and an ingate which are arranged on a sand mould. The molten metal purification device is characterized in that a flow choking core, which is matched with the ingate and provided with a longitudinal cross section taking the shape of L rotated clockwise by 90 degrees, is placed on the sand mould surrounding the ingate through steps, the bottom surface of the front part of the flow choking core and the bottom surface of the ingate form a front area of the ingate, the bottom surface of the rear part of the flow choking core and the bottom surface of the ingate form a rear area of the ingate, and a ceramic tube connected with a casting cavity is arranged at the bottom of the rear area of the ingate. The molten metal purification device has the advantages that the purity of molten metal is effectively improved through a secondary slag blocking effect of the flow choking core matched with the ingate; and the device is simple in structure, easy and convenient to use and operate, can improve labor productivity, and is beneficial to the reduction of casting costs.
Description
technical field [0001] The invention relates to metal casting, in particular to a metal liquid purification device for casting. Background technique [0002] Casting alloys will produce a large number of inclusions, such as oxides, carbides, nitrides, hydrides, etc., during the melting and pouring process. These inclusions mainly exist in the molten metal in the form of agglomerates or fine particles. During the pouring process, the molten metal carries these inclusions into the cavity through the pouring system, and finally remains in the solidified structure of the casting, destroying the solidified structure of the casting. The structure becomes the main reason for casting cracks, which greatly restricts the improvement of casting quality and performance, and even leads to the scrapping of castings. Therefore, it is very necessary to adopt technical measures to purify the molten metal and reduce inclusions in the molten metal during the pouring process. [0003] At pres...
Claims
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IPC IPC(8): B22C9/08
Inventor 张孝勇赵守国苏艳王恒陈霄飞
Owner SHENYANG MACHINE TOOL YINFENG FOUNDRY