17. How I cut rubber molds

This video shows how I go about cutting open a new rubber mold for wax injecting. The waxes created from molds like this are then used in the lost wax casting process.
Always remember that knives are sharp, concentrate on what you're doing, so you don’t cut yourself.

[@jorgenava1726]

Creo que es mejor al iniciar el vulcanizado del molde ,la mitad del mismo se cubre con una delgada capa de talco,esto ayuda a que despues devulcanizado el molde se abra sin necesidad de cortarlo. Si elmolde que se vulcaniza es de hule para llantas,este tiene unas propiedades increibles,el molde despues d vulcanizado se ahoga en petroleo durante 24horas,elmismo se incha asta un 500/100,aumentando de tamaño el grabado..despues se le cuela parafina,obteniendo una copia d mayor tamaño. Proceso "jonapru"

[@cindyturner7240]

Thank you so much. Great video. I look forward to learning more.

[@strataartstudios3826]

You're welcome. Glad it helped.

[@eekoeek1]

Could you please tell us the name of the tool/clamp to help hold the mold so I can google it? Ive been trying to find one for a while but not knowing what those specific tools are called has made it impossible for me to fine one.

[@strataartstudios3826]

I have spent a few days looking for something commercial with no success. You can use a bench vice, but try to only grab your rubber mold on the ends away from your model so as not to crush the model. I have seen people use vice grip pliers to grab molds as they cut. These have been modified to be attached solidly to your desk top so you can pull the mold. If you have a bench vice that is bolted down you could clamp the vice grips into it.

[@eekoeek1]

@strataartstudios3826 Thank uou for trying to help. ❤️ I finally found one on Amazon. Others looking can do a search for 'RETRACTOR 2X3 PRONG BLUNT/BLUNT 4 1/2 INCHES'.

[@hemantdmore1015]

Super cutting. Can I cut a big piece like 1.5x2.5 inches laxmi murti.

[@strataartstudios3826]

I don’t see why not. I have cut thicker molds in this manner before. Just keep in mind that the thicker the rubber the more resistance it gives as you try to bend it.

[@ИНТЕРЕС-я5ы]

Не понимая английский. Я всё прекрасно понял. Практично и по существу

[@strataartstudios3826]

Thank you. I am glad it was understandable.

[@ayeshbasrawe2585]

Hello my friend Thanks for this nice video I have a problem When injecting wax into the mold Next gets .. First, a deformation of the model Second, the wax came out from everywhere Third, there is incomplete presence of the wax inside the model or half of the figure and is weak ...

[@strataartstudios3826]

There are many things that could be causing this. 1. Are you holding the rubber mold with a metal plate on each side? This means that you can apply an even pressure over the entire surface of your mold. 2. Are you squeezing too tightly? If you are, this can distort the rubber preventing flow and also possibly opening up an area for it to leak out. 3. Is the pressure of your wax injector too high? Higher pressure may cause the wax to squirt out. 4. Is the wax in the injector at the right temperature? If too high, it will cause bubbles and sticking to the mold. 5. How long is your injection time? If not long enough then you are not giving enough time to fill. I count to three to give it enough time to fill. 6. Are you cleaning all the wax off the mold between injections? If you leave any wax bits stuck to the mold from one injection to the next, you run the risk of it holding your mold apart and causing the leaking you’re describing. I hope this helps.

[@ayeshbasrawe2585]

Thank you my friend I will do as you adviced By following all the steps in detail And see the result.

[@sumedhyeragi3043]

What is the name of tool?

[@strataartstudios3826]

I was using a scalpel to cut the mold. You can get them from any jewellery supplier. The other tool I used was an old burnisher to pop out the sprue cone, but you could easily use anything that you have on your desk to do this job. It just happened to be the first thing I grabbed.