An early version was just copper wire wrapped around a threaded rod inside a Teflon tube ... plastic bits. Paddles stir up the granules in the hopper for an even flow into the extruder, and ...

His extruder sort of works ... much like a 3D printer’s hotend to keep hot plastic from creeping towards the cooler part of the tube and clogging. With his current experience and a bigger ...

The line allows the Toronto-based firm to produce larger and more durable lay-flat combo liners for leak-proof applications.