tubachris85x
Master Member
Getting ready to order supplies I need to mold my helmet (transition mold) so I'm going with the Polyurethane rubber due to cheaper costs...
So far, here's a list of supplies I will be getting:
-Polytek 35 brushable rubber
-2300 mold release
-Johnson/minnewax sealer
-Cabosil (thickening agent)
Mothermold material to be determined...between fiberglass, hydrocal, or a custom resin/polyfiber mix..
I feel that I have a general understanding of how to proceed with this, but I can't help but feel I'm gonna mess something up.
In my mind, this is the process I understand:
1. Seal the clay/sculpt
2. brush on 2300 release agent (or spray?)
3. mix first small batch of rubber, apply very thinly across entire surface
4. repeat step 3 (at least 3-4 times(?))
5. make a new batch of rubber, add cabosil, to make a key "mowhawk"
6. let everything cure for a day (or however long is needed)
7. apply mold release across surface
8. create shim to go down the center of the sculpt/apply vasaline/mold release
9. begin one side of mother mold
10. finish other side of mother mold
11. drill holes and apply bolts/wing nuts to mother mold before separation.
12. Remove mother mold shells, make a cut down the "mowhawk" making keys down the center.
13. remove sculpt, reassemble mold and begin casting
Is this right? I'm going at this entirely alone (for the most part) for the first time ever. One concern is if I am using a sealer on clay, will that ruin the clay? It's plasticine clay. My last question would be is, should I go with hydrocal or fiberglass? Fiberglass is definitely cheaper, but I have a local supplier for hyrdrocal!
Thanks!!
So far, here's a list of supplies I will be getting:
-Polytek 35 brushable rubber
-2300 mold release
-Johnson/minnewax sealer
-Cabosil (thickening agent)
Mothermold material to be determined...between fiberglass, hydrocal, or a custom resin/polyfiber mix..
I feel that I have a general understanding of how to proceed with this, but I can't help but feel I'm gonna mess something up.
In my mind, this is the process I understand:
1. Seal the clay/sculpt
2. brush on 2300 release agent (or spray?)
3. mix first small batch of rubber, apply very thinly across entire surface
4. repeat step 3 (at least 3-4 times(?))
5. make a new batch of rubber, add cabosil, to make a key "mowhawk"
6. let everything cure for a day (or however long is needed)
7. apply mold release across surface
8. create shim to go down the center of the sculpt/apply vasaline/mold release
9. begin one side of mother mold
10. finish other side of mother mold
11. drill holes and apply bolts/wing nuts to mother mold before separation.
12. Remove mother mold shells, make a cut down the "mowhawk" making keys down the center.
13. remove sculpt, reassemble mold and begin casting
Is this right? I'm going at this entirely alone (for the most part) for the first time ever. One concern is if I am using a sealer on clay, will that ruin the clay? It's plasticine clay. My last question would be is, should I go with hydrocal or fiberglass? Fiberglass is definitely cheaper, but I have a local supplier for hyrdrocal!
Thanks!!