Gravimetric Dosing Systems

The dosing unit system is designed to work in combination with our extrusion control system with secondary material metering at pre-set percentage rates. The ratio of the main material and the dosing unit are held constant by continuous measurement of each material feed.

Material feed rates are kept at constant percentages rates irrespective of extruder throughput and changes in production speed.

With no need for mechanical mixers, the material is metered accurately and continuously for accurate and repeatable product properties with no risk of material separation.

The dosing unit speed is regulated by high resolution stepper drive technology with  no loss in speed control accuracy across the rev range of the dosing unit.

The dosing system can be supplied in either Main + 4 dosing or main + 6 dosing.

On-Line Profile Measurement systems

Applications, uses an inert type of sensor which can be handled without the need of special safety and end of life disposal considerations.The C-head unit is mounted on an automatically adjustable radial arm which regulates contact pressure by a load cell feedback Capacitive based high resolution on-line profile measurement systems for blown film.

Ensuring optimum contact / distance pressure. The radial unit can be mounted in a fixed position (for use with rotational die heads) or on round scanner track (various diameters available for scanning the circumference of the Blown film tube.

Profile Control Systems PRO-CON

The PRO-CON system is fitted to our range of C series air ring, with a number of actuators (quantity depending on air ring diameter) fitted around the outer circumference of the air ring body, the volume of cooling air is varied automatically to regulate thin and thick areas of the film to a minimal tolerance. Once moved to a pre-set target position electrical energy is not required to maintain the profile tolerance. The system can be reset to a neutral position at any time during production and does not affect the melt temperature of flow dynamics in the die head. Control response is fast with 75% of available control reaction achieved within four scans of the profile (process conditions dependent).