> News

News

Co-rotating vs counter-rotating twin screws

Co-rotating screws turn in the same direction; counter-rotating screws turn in opposite directions. For a replacement order, rotation is a fixed machine input. Confirm it from the gearbox output, screw hand and original drawings before discussing diameter, material or surface treatment.

Cable Extrusion Screw Barrels: The Compound Decides Everything

In most extrusion, a gel or an unmelted particle is a quality complaint. In a cable extrusion screw barrel, it is a weak point in a dielectric that will sit in a wall or a duct for thirty years. That difference in consequence is what drives the whole specification.

Blow Moulding vs Blown Film Screw Barrels: Which One Are You Buying?

Roughly once a month an inquiry arrives asking for a blow moulding screw barrel, and the photographs attached show a blown film line. The names sit next to each other in every catalogue, including ours. The processes have almost nothing in common.

L/D Ratio and Compression Ratio: What the Numbers Don't Tell You

A customer sends a drawing marked 30:1, compression 3:1, and asks us to copy it. Nine times out of ten we do exactly that. The tenth time, we ask what they feed the machine — and the answer explains the problem they have been living with for two years.

Screw Barrel Quality Inspection: What to Check Before You Pay

To verify a screw barrel before you pay, check three things: dimensions, materials and surface. Require an inspection report with the actual measured dimensions of your parts (not the design values), a material certificate with chemistry and heat number, and the surface treatment with its measured d......

Screw Mixers Explained: Maddock vs Pineapple vs Saxton

A mixing element is a section machined into an extruder screw that makes the melt more uniform. The three most common are the Maddock (high-shear, dispersive — breaks down unmelt and agglomerates), the Pineapple (low-shear, distributive — evens out colour and temperature), and the Saxton (distributi......

<1 2 3 4 5...21 >