Pf103Series Refractory High-Temperature Coated Sand Phenolic Resin
Product characteristics
Pf103series coated sand phenolic resin has characteristics of Resistant-Oxidation under high temperature.Under the experimental condition of 1000℃ and 1min, High-temperature resist-compression strength≥0.15mpa.and under pressure experimental condition of 1000℃ and 0.1mpa,the resist- compression time≥ 150seconds,which can be effective to prevent sand mold or sand core from deforming or cracking or occurring other casting defects under high temperature,can be used for sand mold and sand core of engine cylinder cover and water jacket;common casting iron and casting steel.
Technical Index
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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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Free Phenol(%)
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Pf-103
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Yellow pink and stripshape
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≤ 0.5
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85~95
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20~45
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≤ 3.0
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Film-covering process for reference
1. The added quantity of parting sand partile size and resin is chosed according to size and strength of sand size and core, and the temperature of adding resin should be 40~45℃ 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 lube 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℃
Package and storage
With strip shape, packed with 25KG Kraft bag, inner lined with plastic vessel. Put it in shady and cool place for storage, keep it free of direct solar radiation, and the package bag should not be stacked too high so as to avoid lumps.