You can connect keyboard, USB hard drives as well as gaming controllers to your Android phone or tablet using a USB OTG adapter. Have a look on this tutorial.
It is necessary to choose an injection molding machine with the same capacity as the injection molding products. If the injection molding machine has problems such as material dead ends, it is best to replace the equipment. The chromatic aberration caused by the mold gating system, exhaust groove, etc., it can be solved by the maintenance of the corresponding part of the plastic mold by injection molding accessories suppliers. The problem of injection molding machines and mold must be solved first before production can be organized to reduce the complexity of the problem.