Uniset (Coldbox)

Uniset (Coldbox)
(Phenolic Urethane Amine Cold Box Process)
UNI SET system is a highly reactive and efficient cold box process. UNI
SET resin and hardner are mixed together with sand and the sand mixture
is cured within seconds when a gaseous amine catalyst is passed through
this mixture.
The system consists of following parts

UNI SET 710: Phenolic ResinUNI SET 720: Polymeric IsocyanateUNI SET 730: Liquid catalyst
Typical Physical properties of ResinUNI SET 710


Specific Gravity @ 30oC: 1.04 - 1.08Viscosity B4 cup @ 30oC: 1 - 2 minutes
Typical sand mix




Dry Silica sand (AFS 50-60) (Free from carbonates)

100 PARTS



UNI SET 710

0.80 - 1.00 % Of Sand



UNI SET 720
0.80 - 1.00 % Of Sand



UNI SET 730

0.1 - 0.2 % Of Sand In The Form Of Gas





Dry silica sand having AFS No. 50-60 and free from carbonates is best suited for the UNI SET system.
Both batch type and continuous mixers can be used for sand preparation
and the bench life of sand mixture is around 45 minutes to 1 hour
depending upon ambient conditions.Core Making Process


This process requires special core shooter with gas generator for
making the cores. In addition to this, special precautions should be
taken regarding the quality of air i.e. dryness and cleanliness of air.The sand mixture is blown in the core-box and amine gas is passed
through the sand at controlled pressure and temperature. Excess amine
catalyst is purged by passing dry air and core is stripped from the
core-box. Typical cycle time is less than one-minute. Chemical dryer
unitbetween core shooter and compressed air is a must. Moisture in compressed air deteriorates quality of core.
Advantages
High productivity due to faster curing rate.Energy savings as no heating is required.Excellent dimensional accuracy as core is cured in the core box itself.Cores are ready for assembly- immediately after stripping.Excellent surface finish and break down properties.Low gas evolution as binder content is less.Useful for all types of metal.Excellent strength retention, even after application of water base wash.Good resistances to scabbing & veining.
Mould & Core Points: Water based paint can be used.Shelf Life
6 months from the date of manufacture.Standard Packing




UNI SET 710: 200 Kg. M.S.barrelUNI SET 720: 200 Kg.M.S.barrel.UNI SET 730: 10 Kg.M.S.drum
Storage & Handling
Store under roof, away from heat and moisture. Direct flame contact should be avoided.While handling, all safety measures should be used.