You can Build one, not to much of a problem.
First thing though, find out how many oz's
each shot requires. If you are just doing a
reload / shot method, then a simple plunger
will suffice. If not then you are looking at
a more complex injection group that you will
have to fabricate. Requiring:
Barrel, Feed Screw, Torpedoe, Check Ring,
a Hydraulic Power Supply, Hydraulic Motor,
Hydraulic Cylinder, 240V Heater Bands, Nozzel,
Nozzel Heater Band, Required # of Controlers,
Hydraulic Manifold, Presure & Flow Control Valves
Presure Gages (aprox 3), Required Hydraulic Hoses
And the required lengths of 1"x10" steel plate,
and required hardware, to build the carrage.
This is called an Injection Group, sounds hard,
but I made one in about 2 weeks time a few years
ago. Principals you must understand when injection
molding, are cycle time, Injection presure,
Holding Presure, Back Presure, Injection & Feed
rates,& Clamping Presure, etc.. If you truely
want to build an Injection Molding Machine, I
have a few blue Prints of a few comercial machines
Nissi, Engel, Battenfeld, that I could copy for
you. Just email me.
Good Luck in your endevour.
Jim