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INTRODUCTION : CORE PASTE ,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 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.

Description: Core Paste , 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.

Core Paste, Hot Shell Adhesives

PRODUCT
 
INDUSTRY
   
CARRIER
   
PHYSICAL PROPERTIES
   
DESCRIPTION
Sand Casting
Investment Casting
Lost Foam Casting
Water
Oil
Solvent
Flash Point (F°)
VOC (lbs/gal)
Wt/Gal (lbs/gal)
PH

FoundryGeneral® Foundry Core Paste 1000
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NA
0
14.65
11
Silica free, no VOC

FoundryGeneral® Foundry Core Paste 1500
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NA
0
14.55
11
Thicker version of AIRSET 1000

FoundryGeneral® Core Paste 9672
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NA
0
14.55
11

FoundryGeneral® Foundry Adhesive 100
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428
ND
8.55
NA
Hot shell core paste, visc. = 10,000 cps

FoundryGeneral® Foundry Adhesive 150
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428
ND
8.76
NA
Hot shell core paste, visc. = 15,000 cps

FoundryGeneral® Foundry Adhesive 250
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428
ND
8.55
NA
Hot shell core paste, visc. = 25,000 cps

FoundryGeneral® Foundry Adhesive 300
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428
ND
8.3
NA
Slower drying hot shell core paste

FoundryGeneral® Foundry Adhesive 9612
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428
ND
8.14
NA
Slower drying hot shell core paste
FoundryGeneral®
FoundryGeneral® Green Core Paste Standard
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0
0
12
NA
Fast drying, high tensile strength, no VOC

FoundryGeneral® Green Core Paste Thick
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0
0
12
NA
Thicker version of QUIKDRY