Introduction :
No Bake Core Pastes and Hot Shell Adhesives
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 No Bake
Core Pastes 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.
Description:
No Bake Core Pastes and Hot Shell Adhesives
In the Shell or Hot Box Process, resin
bonded sand or a sand/resin mix is placed on
a heated metal pattern for a short period of
time to form a partially hardened shell. The
bulk of the sand mixture inside the shell is
removed for further use and then the pattern
and shell are then heated to further
polymerize the sand/resin mix. The shell is
then removed from the pattern. As with the
No Bake Process, these shells are broken or
are sectional cores and require an adhesive
in order to piece them together. Hot Shell
Adhesives containing a thermosetting resin
are typically used for this. These Hot Shell
Adhesives are generally applied to the hot
shell cores and molds and typically utilize
a liquid carrier that does not boil or dry
out rapidly, allowing the operators
sufficient time to position the pieces.
FoundryGeneral® No Bake Core Paste 1000 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 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.
FoundryGeneral® Foundry Adhesive 100 is a ready to use hot shell core and mold paste. When applied to the hot drag of a shell mold, FoundryGeneral® Foundry Adhesive 100 does not boil or dry out quickly, allowing the operator sufficient time to properly position the hot cope half of the mold.
FoundryGeneral® Foundry Adhesive 150 is a ready to use hot shell core and mold paste. When applied to the hot drag of a shell mold, FoundryGeneral® Foundry Adhesive 150 does not boil or dry out quickly, allowing the operator sufficient time to properly position the hot cope half of the mold.
FoundryGeneral® Foundry Adhesive 250 is a ready to use hot shell core and mold paste. When applied to the hot drag of a shell mold, FoundryGeneral® Foundry Adhesive 250 does not boil or dry out quickly, allowing the operator sufficient time to properly position the hot cope half of the mold.
FoundryGeneral® Foundry Adhesive 300 is a ready to use hot shell core and mold paste. FoundryGeneral® Foundry Adhesive 300 is a slower version than the 100 through 250 series with a longer open time for very hot shells or in applications where prolonged open times before shells are closed is required.
No Bake Core Pastes and
Hot Shell Adhesives
Product
Industry
Carrier
Physical Properties
Description
CORE PASTES / ADHESIVES
FoundryGeneral® No Bake Core Paste 1000
NA
0
14.65
11
Silica free, no VOC
FoundryGeneral® No Bake Core Paste 1500
NA
0
14.55
11
Thicker version of AIRSET 1000
FoundryGeneral® Foundry Adhesive 100
428
ND
8.55
NA
Hot shell core paste, visc. = 10,000 cps
FoundryGeneral® Foundry Adhesive 150
428
ND
8.76
NA
Hot shell core paste, visc. = 15,000 cps
FoundryGeneral® Foundry Adhesive 250
428
ND
8.55
NA
Hot shell core paste, visc. = 25,000 cps
FoundryGeneral® Foundry Adhesive 300
428
ND
8.3
NA
Slower drying hot shell core paste
FoundryGeneral® Green Core Paste Standard
0
0
12
NA
Fast drying, high tensile strength, no VOC
FoundryGeneral® Green Core Paste Thick
0
0
12
NA
Thicker version of QUIKDRY
Customer
Comments :
Do you have a
core daub without water? If not, could
one be made? I have a customer that uses
dab that has to wait a full day before
pouring due to the daub drying slow.
Our Recommendations : By core daub or you
referring to a mudding compound or a
core paste? In our current product line
our mudding compounds do contain water
and our core pastes are solvent based.
Please see the links below for more
thorough descriptions.