In the No Bake or Air Set Process, molds/cores are produced using a resin bonded air setting sand. These molds/cores are allowed to harden under normal atmospheric conditions. Quite often these molds/cores are broken or are actually sectional cores and as such require Core Paste to join the pieces together. Water based, silica free products are available for this need. If a faster drying time is required, solvent based products are also available.
FoundryGeneral® No Bake Core Paste 1500 is a thicker version of FoundryGeneral® No Bake Core Paste 1000. It is a ready to use air drying paste that is silica free. It is ideal for automatic dispensing paste that is silica free. It is ideal for automatic dispensing systems since it does not contain material that will abrade or wear out the equipment. FoundryGeneral® No Bake Core Paste 1500 penetrates into the sand matrix to form a strong bond and is primarily used with no bake systems, but can also be used with core oil, hot box and cold box systems. Once completely dry, an inorganic bond is formed which produces very little if any gas evolution on pouring. The set time can be reduced by heating the joining surface to about 250 °F. FoundryGeneral® No Bake Core Paste 1500 can be used on oil sand, cold or warm (not hot) shells cores and molds as well as resin or sodium silicate bonded cores and molds. RECOMMENDED APPLICATION: 1 FoundryGeneral® No Bake Core Paste 1500 can be used as supplied with only light mixing or can be thinned with water to achieve desired dimensional tolerance between glued parts. Additional water will slow down setting speed. 2 FoundryGeneral® No Bake Core Paste 1500 should be mixed until homogeneity is achieved prior to use. The mixer should be of variable speed, properly sized, and oriented in the mixing vessel to prevent vortexing. 3 FoundryGeneral® No Bake Core Paste 1500 can be applied by dipping, brushing, or with a paste gun. Preheating the surface to be glued for sodium silicate cores will result in maximum strength. 4
Be sure FoundryGeneral® No Bake
Core Paste 1500 is fully dry before
placing in molds. BENEFITS: - No VOC - High tensile strength - Inorganic based - Low gas evolution - Fast air and oven dry properties Click Here to View Technical Data Sheet |
