Strongly interwoven

Different mesh types and crimp/weaving patterns with applications data and suggestions concerning fitting wire meshes in screens

Double crimp – which is the basic, universal crimping pattern

Intercrimp – when the ratio of mesh versus wire diameter is more than four

Long-slot weaving pattern to increase the screening surface. Cross wire spacing should not exceed more than seven crimps

Harp (a) or triple-shut (b) weaving pattern to overcome blinding or pegging, and to remove slivers (flats)

Self-cleaning wire screens; different mesh patterns (a-d)

SPT (suspended pivoting
tensioning) device

Best result is obtained with an even number of bars

PC-1 model for wires 1 to 4 mm

Automatic feed/stamping machine for heavy-gauge wires up to 20 mm diameter

Fully automatic CNC type crimping/weaving line

All-in-one semi-automatic loom for wires from 1 to 12 mm

USP-2100 fully automatic machine for making self-cleaning screen panelshowing integrated polyurethane extruder in front view (a) and rear view (b)

Fully automatic wire crimping machine, model PC-40 for wires 1 to 12 mm

Summary

This article will treat mainly wire mesh types, manufacturing methods, applications and implementations. The information is based on long field experience in wire screen manufacture, equipment design and development, the solving of pertinent screening problems in various parts of the world and helping screen producers to improve their working methods and technologies.

1 Separation of aggregates

Wire screens or meshes are the oldest and most efficient means of aggregates separation in terms of open area. They are irreplaceable in small as well as mobile screens with restricted screening surfaces.

For some time, people involved in the separation of aggregates have been using other screening medias, apart from wire meshes, that can be classified as:

• Rubber mats mainly used in mines and quarries on primary and secondary decks where the feed rate and size are too important for wire meshes. These mats are provided with tapered openings to reduce the phenomenon...