Precious Plastic design single screw and barrel for extrusion

Plastic recycling extrusion or injection

Precious Plastic advocates for plastic recycling.
Precious Plastic created machines that enable anyone to recycle plastic, open-source, and create a video for their own builds.
Shanghai representative city of China starts sorting trash into separate bins meant for recyclables, kitchen waste, hazardous waste, and other waste.
Plastic in form of a film or bottle is the main recyclable material that may bring land and sea disasters. Chinese are now focusing on this much.
RobotDigg is trying to provide the key component Screw and Barrel for your extrusion machine.
Extrusion is a continuous process where plastic flakes are inserted into the hopper and extruded into a line of plastic. The extrusion machine runs continuously so, technically, if you have enough plastic and a well-streamlined process you could be recycling 24/7. With the extrusion machine, you can create filament, granulate or get creative working with moulds. This machine is also great for educational purposes as the process is very straightforward and easy to understand. This technique nicely blends differently coloured plastics together and outputs a homogeneous and smooth colour.

If you can Not find the screw drawing from Precious Plastics, here it is for your reference. The copyright is owned by Precious Plastics.

RobotDig is providing a Custom single screw or twin screw, and the barrel for your design of extruders, let's recycle the plastics from the waste.


Band heaters 3045 which is a diameter of 30mm, is suitable for the barrel.

There are 2 options for the screw diameter and design of the connection. Diameter 24.6mm and 25.7mm.
D25.7 PP-ES588L-D257 Drawing as per the following