A kind of low-cost environment-friendly alcohol-based cast iron coating and preparation method thereof
An alcohol-based cast iron, low-cost technology, used in casting molding equipment, coatings, molds, etc., can solve the problems of leveling, brushing, poor air permeability, poor sintering peeling, and poor surface quality of castings, etc. problem, to achieve good sinterability, obvious price advantage, and the effect of reducing pores
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Embodiment 1
[0034] Step 1: Weigh 55 kg of bauxite, 6 kg of quartz powder, 3 kg of mullite powder, 3 kg of pyrophyllite powder, 2.43 kg of sodium bentonite, 2.67 kg of expandable graphite, 0.43 kg of rosin, and low-viscosity polyvinyl alcohol 0.47 kg of butyral, 27 kg of alcohol;
[0035] Step 2: Put the above powder in the mixing tank, start the mixer, and mix for 5 minutes;
[0036] Step 3: Pour half of the alcohol, namely 13.5 kg, into the mixing tank slowly, add while stirring, and stir for 25 minutes after adding;
[0037] Step 4: Slowly add the remaining half of the alcohol, namely 13.5 kg, into the mixing tank, stirring while adding, continue to stir for 5 minutes after the addition, the material can be used, the paint can be brushed, sprayed, or flow coated. Dip coating.
[0038] The effect of pouring castings is as figure 1 , It can be seen that the surface of the casting is smooth and clean.
Embodiment 2
[0040] Step 1: Weigh 48 kg of bauxite, 6 kg of quartz powder, 6 kg of mullite powder, 3 kg of pyrophyllite powder, 3.14 kg of sodium bentonite, 3.1 kg of expandable graphite, 0.38 kg of rosin, and low-viscosity polyvinyl alcohol 0.38 kg of butyral, 30 kg of alcohol;
[0041] Step 2: Put the above powder in the mixing tank, start the mixer, and mix for 5 minutes;
[0042] Step 3: Pour half of the alcohol, namely 15 kg, into the mixing tank slowly, add while stirring, and stir for 25 minutes after adding;
[0043] The fourth step: slowly add the remaining half of the alcohol, namely 15 kg, into the mixing tank, stirring while adding, and continue to stir for 5 minutes after the addition, the material can be used, the paint can be brushed, sprayed, or flow coated. Dip coating.
[0044] Pouring castings (spheroidal graphite iron castings) are as effective as figure 2 , It can be seen that the surface of the casting is smooth and clean.
Embodiment 3
[0046] Step 1: Weigh 53 kg of bauxite, 3 kg of quartz powder, 3.5 kg of mullite powder, 3.5 kg of pyrophyllite powder, 3.08 kg of sodium bentonite, 1.92 kg of expandable graphite, 0.44 kg of rosin, and low-viscosity polyvinyl alcohol 0.56 kg of butyral, 31 kg of alcohol;
[0047] Step 2: Put the above powder in the mixing tank, start the mixer, and mix for 5 minutes;
[0048] Step 3: Pour half of the alcohol, namely 15.5 kg, into the mixing tank slowly, add while stirring, and stir for 25 minutes after adding;
[0049] Step 4: Slowly add the remaining half of the alcohol, namely 15.5 kg, into the mixing tank, stir while adding, and continue to stir for 5 minutes after the addition, the material can be used, the paint can be brushed, sprayed, or flow coated. Dip coating.
[0050] Pouring castings (spheroidal graphite iron castings) are as effective as image 3 , It can be seen that the surface of the casting is smooth and clean.
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