Pf101 Series High-Strength coated sand phenolic resin
Product characterics
This series coated sand phenolic resin is yellowish and in strip shape with following characteristics:
1) coating with low temperature,good soakage;
2) high strength,used for sand mold and sand core in common casting iron
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Model
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Appearance
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moisture
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Softening point(℃)
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Aggregation speed(s)
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FreePhenol(%)
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Pf-101
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Yellowy and strip shape
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≤ 1.0
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80-90
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50-80
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≤ 4.5
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Technical Index
Coating process for reference
1. The added quantity of parting sand particle size and resin is chosen according to size and strength of sand core, and the temperature of adding resin should be 40~50℃ higher than softening point of resin.
2. The mixed proportion of methenamine water solution should be: methenamine/water=1/2~2.5 and added quantity of methenamine should account for 12-15%of resin quantity.
3. The lubricant quantity added should account for 5~7%of resin quantity.
4. The sequence and time of adding material:
135-150℃ 60-90seconds Methenamine cool down and break up
Crudesand +Resin + +Calcium stearate Addingsand
Mixed 110-120℃