DIY Plastic Injection Molding at Home. I'm using my AB-150 injection molding machine, made by A.B. Plastic Injectors in Canada: https://www.abplasticinjectors.com/ab.... Along with the Travin TP-1 made in the U.K.: http://www.travin.co.uk/tp1.html. The largest mold needs screws to hold it together.

I have a number of molds 10 years ago for a model train kit called the Dolores Conoco Plant made in HO and S scales by Ragg's...To Riches: http://raggstoriches.biz/CONOCOPLANTs....

There lots of tricks to home/DIY injection molding, and it's not hard. Nor does it take a huge investment to get started. I made these molds with a Taig CNC machine (that I sold a few years ago).