Will rescue you "semi"
Plastic scrap can be found everywhere. House constantly appear old broken things on the street full of bottles and packaging. The lover to do something with their hands may be the idea all gather, to grind and melt it into something valuable.
Novice "caster" to not do this because each type of plastic has inherent properties so that melting would have at different temperatures. In addition, the production of cast parts usually in special installations where it is maintained at high pressure.
Even if you manage to pick the pieces of plastic of the same type and grind them, when melted, it will bubble. So it is best to go to the hardware store and buy the liquid plastic from which the details are obtained is no less durable than the factory. To replace can plastic and epoxy resin. You will also need:
- large capacity;
If you do decide to do something out of plastic scrap, do not do it indoors. A pair of plastic toxic.
Do the form
For casting at home a few plastic parts you will need the master model. To make it out of anything. For you:
paper and many other materials.
Make model parts that will leak. Smother it with petroleum jelly or other lubricant. Then make the form. Becoming increasingly popular forms of silicone. It's difficult to work with this material easy and convenient, but you need to consider several factors. First, the silicone is of two types, potting and coating. Second, each species – its aspect ratio and its viscosity. Regarding the first option, for plastic molding suitable silicone with a factor of 200%.
Note the coefficient of viscosity. The smaller it is, the more accurate will form. This is especially important if you are using a casting silicone. Note also the curing time. If you have casting silicone, the master model is put in the flask (it can be made from steel or perhaps bronze) and fill with silicone. Coating material gently apply with a brush, given all the irregularities. Allow the silicone to harden, then remove the master model.
Flask is a metal container. It should be slightly bigger than the master model.
The casting process largely depends on what you're doing detail. Polyester resin and liquid plastic is good because there is nothing to melt you do not have, but they differ in viscosity and the time of life. These settings are specified in the specifications. Apply form lubricant and fill it with liquid plastic as described in the instructions. Allow the plastic to harden, and then remove the product from the mold.