Hindusthan Adhesive & Chemicals

Other Details

Furan no-bake binder system is the new & latest technology, has been launched to serve the foundries better. It has some unique features & wide flexibility to use, which makes it popular & acceptable worldwide.

General specification:

• APPEARANCE: It is a free flowing, pale yellow to brown, clear, viscous liquid.
• DENSITY @ 20 C: 1.12~1.2 g/cm3
• VISCOCITY @ 20 C: 55~150 cps.
• FREE FORMALDIHYDE~ .05~1%
• NITROGEN CONTENT:0~7.0%
• pH: 6.5~7.5
• SHELF LIFE: 6months ~1Yr.

Features:

HIGH STRENGTH: Can provide high strength at a lower addition rate thus improve reduction in binder costs up to 10~20%.

FASTER CURING: Due to faster curing property reduce production time, enhance productivity.

ECO-FRIENDLY: Free formaldehyde is >.05% which lesser than other furan binder system & addition rate in sand is lower which results in better impact on environment as well as at working point.

CASTING QUALITY: Can be used for steel, large & small ductile iron, non-ferrous alloys foundries. Lower addition rate of resin & hardener reduce gas evolution as well as defects like surface sulphurizing, abnormal nodulizing, gas-hole, pinhole etc.

COST EFFECTIVE: Due to high strength with a minimum percentage of resin can be achieved it increase the cost effectiveness.

RECLAIMATION: High reclaimation value of used sand is up to 95-97%.

THERMAL PROPERTIES: High temperature properties are very good leads to less casting defects & good dimension. Collapsibility is better than other binder system.

STRENGTH: Can provide high compressive strength for molds & cores. Moisture detoriation is low.

General application:

Mixing ratio & procedure: Generally percentage of resin varies between 1~1.5% of the sand weight & hardener is 30~70% of the resin weight. Both batch & continuous mixer can be used.

Add hardener to the sand & mix it for 5~60 sec. then add resin &amp: Mix it for another 5~60 sec. The sand is ready to use.

Resin addition: Amount of rein to be applied depends on the sand quality,

(Like grain distribution, shape, clay content etc.), structure & size of the mold & core. Resin addition should be as minimum as possible to achieve the desired quality of mold, core & casting properties. Material with a lower viscosity is easy to mix, increase the flow ability of mixed sand.

Working time & stripping time: Working time, generally varies between 3’~15’ with a stripping time of 9’~40’. Decreasing or increasing the amount of hardener between 30~70% can control curing speed or alternatively a faster or slower grade catalyst can be used depending on the requirement. Depending on the customer requirement material containing higher working time can be delivered.

Stripping time: It should be well judged. Early stripping may cause damage to the mold & delay in stripping may make it difficult to separate the mold from pattern.