Plastic Injection molding is simple with the right equipment. All that you need is a heater and some plastic.
Recycled plastics will yield the best results if kept to their respective groupings. Refer to the recycle symbols and do not mix types.
ABS is my plastic of choice, I used an old HP inkjet printer as the raw materials for this example.
I used a commercially available temperature control for this project but I have posted an accurate precision temperature controller in another Instructable.
All told this project took me about 2 hours and about $50 to assemble and test...
shown below is a 3mm ABS extrusion being done
NOTE: I have added a section with an example of a crude press lever.
Step 1: Important Notice!!!!
Hot plastics are NASTY and EVIL!!!!… USE gloves and a face shield at minimum. For example… Hot ABS is at minimum 110 Degrees Celsius or 230 Degree Fahrenheit and will stick to you plus will continue to burn you after it burns your skin off… Use extreme caution!!!!
Materials required will be shown as used. This as a free-form Instructable. Be sure to read through entirely before deciding if you should build. I built and documented this on the fly as I built it for myself…
I recommend using this in an extremely well ventilated area like outside. The initial set up will produce smoke if the plastic is overheated...