Q: How to make parts in plastic ?

It appears that you want to injection-mold with thermoplastics, which is not a trivial thing to do on a small scale. There are small tryout presses and simple presses made for educational use in schools, but they aren't production machines.

Much small-scale plastic work is done with room-termperature-cure thermosetting plastics (polyester resin, epoxy resin, vinylester resin, polyurethane resin), which are a lot easier to work with. Working with them also is a lot slower, and the materials are MUCH more expensive, however. But they generally have better mechanical and physical properties. They are used a lot for prototypes of parts that will be injection-molded in production.

But building a machine and molds that will give you the heat and pressure needed to injection-mold thermoplastics is a big job, or an expensive job, or both.

What kind of plastic parts are you trying to make, and in what quantities?

-- Ed Huntress

Reply to
Ed Huntress
Loading thread data ...

For the home designer a thermoset, room-temperature cure plastic would be far easier than a thermoplastic. Just about any catalyzed plastic could be mixed and poured into a plastic mold without having to build an injection molding machine.

Reply to
Tim Wescott


formatting link
Gingry plans are in inches, but this shold be no problem.

I have this book but have not yet built the machine.


Reply to
F. George McDuffee

Do anyone here know a site that explain how to "Make your own plastic parts" ?

I am thinking aboat the prosess innvolving:

Hyraulic pressure. Plastic granulat heater. Alu molds whit built inn heaters and cooling channels

reg Axel Norway

Reply to

--What he said. For onesy-twosy stuff I'd recommend Alumilite, which can be had at hobby shops and craft stores.

Reply to

I looked at the book a while back. If you want to build a machine, it looks like a good, engaging project. If you want to make fewer than, say, 1,000 plastic parts, it looks like a good way to waste time preparing to make marginal parts.

I'm not knocking it. Building machines is fun, if that's the object.

-- Ed Huntress

Reply to
Ed Huntress

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.