Cold-type special molding sand for integral casting of large cast steel roller and manufacturing method of cold-type special molding sand
A cast steel roll and integral casting technology, applied in casting molding equipment, manufacturing tools, casting molds, etc., can solve the problems of sand inclusion, product scrap, sand sticking, etc., to improve quality, reduce usage, and improve economic benefits. Effect
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Embodiment 1
[0014] A Φ1200×2800 cast steel rough roll integral casting cold casting special sand, which is composed of the following components in weight percentage: 79% quartz sand, 14.5% clay, 1.5% bentonite, and 5% water.
[0015] The quartz sand is composed of the following components in weight percentage, 55% of 6-12 mesh quartz sand, 35% of 20-40 mesh quartz sand, and 10% of 70-140 mesh quartz sand.
[0016] A method for manufacturing special molding sand, weighing 6-12 mesh quartz sand, 20-40 mesh quartz sand, 70-140 mesh quartz sand, clay, and bentonite into a hopper according to the above ratio, and then pouring it into a sand mixer to dry Mix for 3 minutes, then add water and mix for 10-15 minutes. The molding sand made with this ratio has an air permeability greater than 750, a wet compressive strength greater than 0.08MPa, and a dry compressive strength greater than 0.65MPa.
[0017] Such as figure 1 As shown, when using the special molding sand molding of the present invent...
Embodiment 2
[0021] A Φ1000×2600 cast steel rough roll integral casting cold casting special sand, which is composed of the following components in weight percentage, 76% of quartz sand, 15% of clay, 2% of bentonite, and 7% of water.
[0022] The quartz sand is composed of the following components in weight percentage, 50% of 6-12 mesh quartz sand, 38% of 20-40 mesh quartz sand, and 12% of 70-140 mesh quartz sand.
[0023] The manufacture method of special-purpose molding sand is identical with embodiment one.
Embodiment 3
[0025] A Φ1260×1200 special molding sand used for integral casting of cast steel back-up rolls, which is composed of the following components in weight percentage, 80% of quartz sand, 13% of clay, 1% of bentonite, and 6% of water.
[0026] The quartz sand is composed of the following components in weight percentage, 58% of 6-12 mesh quartz sand, 31.5% of 20-40 mesh quartz sand, and 10.5% of 70-140 mesh quartz sand.
[0027] The manufacture method of special-purpose molding sand is identical with embodiment one.
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