When you need to make many of the same items, for example, a batch of parts in production or weapons for an army of soldiers during modeling, it becomes clear that you cannot do without special molds. There are proven ways to make them. A high-quality home-made mold allows you to get about a hundred copies.
Necessary
- - machine oil;
- - scalpel or sculptural knife;
- - two-component green-staff for mold making;
- - epoxy or sculptural putty.
Instructions
Step 1
First, select a hard plastic box that is the right size for the part you are copying. We need such that it fits with a margin in two folded halves. Lubricate both container halves and the part with machine oil. Mix for one half of the container so much green-light (hereinafter brilliant green) that the part pressed in half squeezes a little mixture over the edge.
Step 2
While the brilliant green has not yet frozen, tamp it next to the part, take the convex places, drive it into the corners, cut off the excess with a knife. Use a pencil or something to press in the four corners for precise alignment of the mold in the future. Now all this must be left until the brilliant green is completely solidified.
Step 3
When the first half of the mold is dry, mix about the same amount of brilliant green, apply it to the second half, lightly grease its surface with oil using a brush. Fold both halves of the container together, squeeze from one corner to the other, then to the next, etc., aligning the edges until they are aligned. Press hard. Excess brilliant green will crawl out of the cracks - it's okay. When the edges are almost closed, remove the excess with a knife, leave until completely hardened.
Step 4
Now that the composition that has adhered to your copied part is completely solidified, lightly scrape the gap between the mold halves around the entire perimeter, pick up the edge of one of them on both sides with the knife blades, carefully separate. The part should be removed even more carefully so as not to spoil the edges of the hardened green. Your mold is now ready to make a large number of parts.
Step 5
To make a copy of a part, lightly lubricate both halves of the mold with machine oil, and mix together a small amount of epoxy or putty. Put the resulting mass in both halves of the mold, put everything together, squeeze out the excess with strong compression. Leave the mold to harden completely. When the time is up, remove the frozen copy of your part, remove the flash from its side seam. If there are depressions on the surface of the copy from air bubbles trapped when filling the form with green paint, cover them with a new mixed composition. After drying, clean it - the copy is ready.
