Magnetic filtration screen used for non-ferrous metals casting, and its making method
A non-ferrous metal and production method technology, applied in the direction of improving process efficiency, etc., can solve the problems of losing the iron in the filtered molten metal, and the magnetic ring cannot evenly absorb the iron in the molten metal, etc., to improve the purity and machining performance. And the effect of improving yield and reducing production costs
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Embodiment 1
[0023] (1) Use the high-silica glass fiber mesh of the required size as the substrate, and the substrate is coated with refractory coating as the skeleton;
[0024] (2) Place the skeleton in a drying oven and heat it to 730°C to 1050°C for drying. After drying, take out the skeleton and cool it for later use;
[0025] (3) According to weight percentage, 10% to 20% of rare earth metal powder is mixed with 80% to 90% of thermosetting coating to make electromagnetic coating. The thermosetting coating uses epoxy resin, such as bisphenol A / F ring Oxygen resin, phenolic epoxy resin, etc.;
[0026] (4) Coating the electromagnetic paint on the skeleton, and placing the skeleton in a drying box and heating it to 300-450°C for drying;
[0027] (5) The dried skeleton is placed on a magnetizer for electrophoresis magnetization, and the magnetic field strength is controlled to be less than 4000 Gauss to make a finished product.
Embodiment 2
[0029] (1) Cut the high-silica glass fiber mesh of the required size into strips as the substrate. After the substrate is coated with refractory coating, it is placed in a mold cavity at 730-850°C, and the strip filter is pressed To a plurality of conjoined skeletons shaped into spherical shells or disks;
[0030] (2) Place the strip filter in a drying box and heat it to 850°C to 1100°C for drying, take out the strip filter, and cut off each skeleton after cooling for use. The top of the spherical shell has a flat surface ;
[0031] (3), by weight percentage, the rare earth metal powder of 12%~18% is not mixed with the thermosetting coating of 82~88% to make electromagnetic coating, and this thermosetting coating adopts phenolic resin;
[0032] (4) Apply the electromagnetic coating on the skeleton, place the skeleton in a drying box and heat it to 350-400°C for drying, take it out and cool it, and then apply the electromagnetic coating again, and place the skeleton in the dry...
Embodiment 3
[0035] (1) Cut the high-silica glass fiber mesh into the base material of the required size, coat it with refractory paint, put it in a mold cavity at 750-780°C, and shape the filter mesh into a filter with flanges or feet Spheroidal skeleton;
[0036] (2) Place the skeleton in a drying oven and heat it to 830°C to 950°C for drying, then take out the skeleton to cool;
[0037] (3), by weight percentage, the rare earth metal powder of 14~17% is not mixed with the thermosetting coating of 83~86% to make electromagnetic coating, and this thermosetting coating adopts epoxy resin,
[0038] (4) Coat the electromagnetic paint on the skeleton, place the skeleton in a drying box and heat it to 350-400°C for drying, fix the electromagnetic paint on the skeleton, and apply the electromagnetic paint repeatedly in 2 to 6 times Covered on the skeleton, put it into the drying box for drying after each coating.
[0039] (5) The dried skeleton is placed on a magnetizer for electrophoresis ma...
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