Blog

Notes from the workshop floor.

Engineering insights, application notes and industry commentary from the RS Extrutech team.

10 Jul 2026

Tungsten Carbide vs Nitrided Screws: Which Lasts Longer?

Filler loading in PVC pipes is going up. We look at why 0.5 mm tungsten carbide coating is out-lasting nitrided screws by 3× in commercial production.

22 Jun 2026

Designing a 900 kg/hr Twin Screw Line — Lessons from the Field

How screw diameter, L/D ratio and downstream cooling choices interact. Sizing an RS-110-28V line for continuous 3-shift PVC pipe production.

12 May 2026

Barrier Screws for HDPE: Getting Melt Quality Without Overheating

The barrier screw separates melt and solid channels — thoroughly homogenising the melt with minimal temperature rise. Here's how we tune the geometry.