Newsletter 5/2007

Dear customer,

We would like to take the liberty of presenting you with our fifth newsletter of the year with which we want to inform you about new developments and products from Lipp Mischtechnik.

Production of mixtures and products including fibers (glass fiber, carbon fiber, cellulose fiber, composite materials, brake linings, adhesives)

Mixtures with parts of fiber are not easy to produce. The fibers are usually not provided loosely but in aggregates of varying sizes.

The aggregates must be disintegrated during the mixing process in a way that no fiber clusters can form during the mixing. It must be possible for the individual fibers to interpenetrate the mixture.

Lipp Mischtechnik provides two types of machines that are excellent at solving this problem.

1. Batch operation

The TRIQUENCE® -Mixer is used for batch operation.

Illustration 1: TRIQUENCE® - mixing mechanism for mixers with 5000 l gross capacity

Operating principle of the TRIQUENCE® -Mixer:

Mixer with 6 paddles
Mixing element
Scraper
End wall left / right
Direction of movement of the mixing elements
Center
Number of sweeps per rotation:
- with scraper 16
- without scraper 6

This operating principle leads to increased shear in the outer radius of the mixing drum, resulting in significantly improved micro mixture.

Fiber aggregates as well as agglomerates of powdery components are being disintegrated and mixed very well irrespective of whether they are being dry or wet mixed.

Should heating, cooling, or drying be required further to the mixing, this can be executed considerably more effectively than with common plough share or paddle mixers because the heat transmission is 2,25 times higher.

Illustration 2: Active principle of the TRIQUENCE® - mixing system. Unrolling of the jacket with mixing elements speeding over it.

2. Continuous operation

Illustration 3: View at the internal part of the Reflector®

Illustration 4: Reflector® with flanched on feeding screw for powder components

For continuous operation our inline mixer REFLECTOR®, which operates on the rotor/stator – principle, is being used.

In the shear zones the fiber bundles are being separated but not destroyed. This mixer is also capable of dry and wet mixing.

Both mixer types are available for trials in our pilot plant but can also be provided for trial runs at customer sites.

Should we have aroused your interest, we would be happy to answer all the remaining questions you might have.