Roll-ex Gear Extruders - Fine Mesh Straining

Product catalog summary

Overview of ROLL-EX® Fine Mesh Rubber Straining
The document discusses the advantages of using the Davis-Standard and Uth roll-ex® gear extruder with TRF (two-roll feeder) technology for fine mesh straining of rubber compounds. This technology enhances the quality of rubber compounds by providing an economical and efficient processing option.

Key Features and Benefits

The roll-ex® is designed for non-aggressive material treatment, making it suitable for straining applications of accelerated compounds.
It features a modular design that allows integration with the mixing process, offering a cost-effective solution.
The two-roll feeder (TRF) combines the processing part and strainer head into a compact two-stage unit, facilitating fine mesh straining of warm material.
It maintains a low temperature increase when using fine mesh screens and can handle high pressure up to 500 bar due to the gear pump characteristic and TRF feeding combination.
The system allows excellent feeding of warm rubber strips from the two-roll mill, driven and controlled independently by the TRF.
Its small footprint enables easy integration into existing mixing lines without requiring additional operators.

Advantages of the ROLL-EX® Strainer

The roll-ex® TRF is engineered for process-oriented design, high functionality, economic benefits, and operational ease.
Automatic control allows mixing line operators to manage the roll-ex without additional manpower.
Hydraulically-operated strainer heads with unique mechanical design enable fast screen changes, eliminating the need for automatic screen changers.
Rotor bearings are lubricated by the compound, and any compound flash can be reused, minimizing material losses.
The strainer extruder adapts independently to variations in feeding strip width, roll nip opening, or roll mill speed.
Straining rubber in a warm state saves energy and costs by achieving high viscosity and hardness, eliminating further mastication steps.
Low scrap levels are generated during compound changes due to the reduced volume of the strainer head.

Technical Data of Standard Compounds

Type	Max Output (kg/h)	Max Rotor r.p.m.	Rotor Drive Power	TRF Drive Power	Screen Diameter	Dimensions (L/W/H) cm	Weight
roll-ex® 120 TRF	900	30	30 kW	2 x 5.5 kW	300mm	130/280/210	3,500 kg
roll-ex® 150 TRF	1,500	30	75 kW	2 x 15 kW	370mm	170/400/220	8,000 kg
roll-ex® 300 TRF	3,500	25	132 kW	2 x 22 kW	520mm	187/436/256	13,500 kg
roll-ex® 600 TRF	6,000	25	200 kW	3 x 30 kW	520mm	246/362/266	21,000 kg

All figures are non-binding standard values and subject to technical modifications. Special models are available upon request.

Catalog excerpts

Roll-ex Gear Extruders - Fine Mesh Straining-1

ELASTOMER ROLL-EX® FINE MESH RUBBER STRAINING It has been proven that the quality of rubber compounds can be improved significantly by fine mesh straining. The Davis-Standard and Uth roll-ex® gear extruder with TRF (two-roll feeder) technology provides an economical and efficient processing option. The roll-ex is engineered for straining applications of accelerated compounds because of its non-aggressive material treatment. Modular in design, this extruder can also be used in a single step together with the mixing process for a cost-effective solution. At A Glance • wo-roll feeder (TRF) integrates processing part and strainer head into a compact T two-stage unit, which is linked to the fine mesh straining of warm material. • ow temperature increase when using fine mesh screens and high pressure up L to 500 bar because of gear pump characteristic and TRF feeding combination. • xcellent feeding of warm rubber strips from the two-roll mill by the E independently driven and controlled TRF. • mall footprint for simple integration into existing mixing lines without S additional operators. www.davis-standard.com

Open the catalog to page 1

Roll-ex Gear Extruders - Fine Mesh Straining-2

ROLL-EX® FINE MESH RUBBER STRAINING cont. ROLL-EX® STRAINER ADVANTAGES The roll-ex® TRF is the result of thoughtful and skilled engineering, which has resulted in a process-orientated design, a high level of functionality, economic advantages, and operational ease. • Due to automatic control, the roll-ex can be controlled by mixing line operators so that no additional manpower • The hydraulically-operated strainer heads with a unique mechanical design enable fast screen changes, eliminating the need for automatic screen changers. • Rotor bearings are lubricated by the compound. The small amount...

Open the catalog to page 2