Additional Details
An Ester Cured Alkaline Resin binder (Commonly known as Alphaset Resin):
Introduction:
Among the popular no bake organic binder systems namely Acid cured Phenolic. Alkyd & pepset for making moulds & cores at ambient temperature, no one was found environment friendly. To overcome this problem. environment friendly alkaline phenolic binder system has been developed.
COOLSET- 3010/3005:
A two part cold set binder & hardner is a mixture of organic esters, used for making moulds & cores. Both batch and continuous mixers can be used.
Advantage offered by the system:
- Free From Nitrogen, Sulphur & Phosphorous.
- Water Soluble Resin (Core Box, Patterns & Mixers Can Be Washed & Cleaned With Water).
- Non Corrosive Hardners.
- Easy Stripping From The Pattern. No Sticking.
- Can Be Used With All Types Sands Of High Acid Demand Values.
- No Casting Defects With Steel Castings (Free From Veins, Scabs, Erosions & Hot Tears) Due To Excellent High Temperature Properties Superior To Other No Bake Resins.
- Collapsibility Is Very Good.
- Lowest Gas Evolution.
- Offer Reclaimability.
- Excellent Casting Surface.
- High Productivity And Rapid Strength Development.
- Excellent Core Storage.
Disadvantages:
- Use Of Reclaimed Sand Up To 80% But The Resin Application Rate Would Be Same As That Of New Sand.
- Resin Storage Life- Up To 2 Months.
- Low Bench Life And Sand Compatibility
Recipe & Air Set Properties:
Recommended Recipe:
- Resin: 1.8 to 2.2% by Wt. of Sand
- Hardner: 20-22% by Wt, of Resin
- Bench Life can be varied- 4 minutes to 12 minutes.
Conclusion:
- Cost Wise Acid Cure Phenolic No Bake -Cheapest
- Alkyd & Ester Cured Phenolic -More Or Less Equal
- Pepset -Costliest
- Acid Cured Phenolic No Bake Suffers From Sand Alkalinity, Fumes During Mixing & Pouring And Hot Tearing.
- Alkyd System: Poor Hot Strength & Poor Casting Finish.
- Pepset Having Irritating Smell During Mixing, Has Tendency To Veining And Nitrogen Build Up During Reclamation.
- Alkaline Phenolic No Bake Gives Cleanest Environment, Maximum Resistance To Hot Tearing & Finning & Excellent Casting Finish. However It Has Low Flexibility For Bench Life Adjustment & Poor Sand Compatibility.
- However By Putting Continuous Mixer & A Vibration Unit For Sand Compaction. This System Can Be Standardized To Avail Maximum Benefit Including Cleaner Environment.
:
Introduction:
Among the popular no bake organic binder systems namely Acid cured Phenolic. ){kind=link}