How to cast hollow parts in a mold using wax, clay, epoxy and cement



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Learn the easiest method for duplicate your hollow parts in a ComposiMold mold a re-melt to re-use mold making material.

First we show how to remove the hollow master from the mold. The center of the hollow piece was also molded and used in the video.

Second we use Clear Casting Plastic as an example of a thin slow curing casting material.

The steps include:

Step 1: Prepare the mold with mold release.
Step 2: Place toothpicks in the mold to hold the mold core exactly in the center of the mold making sure there are voids all around the core.
Step 3: Mix the Clear Casting Plastic 1 part A to 1 part B by weight or volume.
Step 4: Pour the Clear Casting Plastic and wait 24hrs for it to cure.
Step 5: Remove the part from the mold.

Third we use wax as an example of a thin quick curing casting material.

The steps include:

Step 1: Chill the mold (preferably in a freezer).
Step 2: Melt the wax and wait for its temperature to fall below 170F.
Step 3: Pour the wax into the mold slushing it around covering the mold evenly.
Step 4: Wait for the wax to cool.
Step 5: Remove the part from the mold.

Fourth we use clay as an example of a semi-solid casting material.

The steps include:

Step 1: Prepare the mold with mold release.
Step 2: Push the clay into the mold.
Step 3: Remove the piece from the mold.
Step 4: Smooth out the imperfections.
Step 5: Wait for it to solidify and then fire the part in a kiln.

Fifth we use ComposiStone as an example of a thick casting material.

The steps include:

Step 1: Prepare the mold with mold release.
Step 2: Mix the ComposiStone 1 part water to 2 parts ComposiStone by volume.
Step 3: Pour the ComposiStone and brush it around with your hand getting all sides evenly.
Step 4: Wait 1 hour for it to solidify.
Step 5: Remove the part from the mold, and let sit for 1 day before painting.

Finally re-melt and re-use the ComposiMold to make a new mold!


Post time: 12-22-2016