Fillers weighing and dosing for rubber compounding

Fillers weighing, dosing and blending is at the heart of most rubber compounding plants and these are core competencies for Chronos Richardson

Fillers weighing, dosing and blending is at the heart of most rubber compounding plants and these are core competencies for Chronos Richardson.

The multi-weigher batching requirements of the compounding room are complex and varied.

Not only because of the diversity of material types, but also due to the range of inclusion sizes that have to be accommodated.

Enhancing their range of fillers weighing, dosing and blending equipment is an on-going process for Chronos Richardson, who have recently introduced a range of pressure scales into their portfolio.

The new scales are already operating and providing high accuracy weighing of carbon black, white fillers and silica and like the range of vacuum scales they are ideal for low headroom or single storey mixing room applications.

Typically supplied in a 100kg capacity the pressure scale features a steel scale casing that is lined with a flexible rubber jacket, has a fluidised outlet cone for optimum filler discharge and is mounted on a loadcell weigh-frame.

Up to ten twin-speed in-feed devices accurately feed filler sequentially into the scale and typically the weighing cycle is 3 minutes for weighing two materials into a combined batch size of 100kg.

As with all fillers weighing applications the number and capacity of scales must be carefully selected to balance cost, accuracy and mixer cycle times.

Feeder types and feed rates are also carefully determined by taking into account batch cycle time, material inclusion size and accuracy requirements.

In addition to its well-proven range of pressure weighing and conventional weighing systems, the Chronos Clean-Feed system provides simultaneous vacuum conveying and weighing of batches of carbon black, and white fillers.

This enables Chronos Richardson to continue to fulfill customer requirements for state-of-the-art mixing plants all over the world.

The Chronos Clean-Feed vacuum scale is positioned close to the mixer and its improved batch-weighing accuracy, data recording and reliability enables rubber compounders to enhance their product quality.

Chronos Richardson Systems Europe, Materials Processing Solutions, is a business unit of Premier Technology.

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