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Extrusion Control Systems


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Gravitrol Brochure


Gravitrol® extrusion control offers the benefits of improved product quality, reduced material usage, quicker startups and product changeovers, reduced scrap, and improved product repeatability.

At the same time, it reduces the operator’s workload by maintaining a constant output, regardless of screen pack or material variations.

The system uses Process Control’s proven Gravitrol® software to automate the control of the line and hold the extruder output to +/- 0.5% by weight. This tight control of output means that product can be made consistently within tolerance at the lowest possible cost, thereby saving thousands of dollars in resin.

Gravitrol Upgrades Icon2

Gravitrol Upgrades


Process Control offers a new selection of upgrades for Gravitrol, including a color touch screen controller, PLC based extruder line speed control, and a DSP weigh module upgrade kit, that will improve your system’s performance and longevity. These upgrades not only add years to your Gravitrol’s life, but can actually improve your accuracy as well. Additionally, the upgrades offer a way to simplify the process and postpone future replacement, making operation easier and saving you money all at once. Your older Gravitrol systems controls, drive modules, and weigh module chips are facing the threat of becoming obsolete; ensure that will not happen by upgrading today. 

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EXB Panel New

EXB2-Series GRAVITROL® Operator Stations


Process Control's Gravitrol® Gravimetric Extrusion Control Systems automate the control of any extrusion line - coextrusion or mono extrusion - on the basis of weight. The EXB2 Central Computer/ Operator Station is the key component of a complete Gravitrol® system.

A standard system has an HG Series Weigh Hopper mounted on each extruder to measure the weight throughput. The weigh hopper reports the measurements to the EXB2 central computer, which controls the extruder drives via B&R Drive Speed Modules. A B&R Line Speed Control Module can be added to control the take-off device for control of line yield (weight per length).

In coextrusion applications with Process Control X Series ...

HGB-Series GRAVITROL® Weigh Hoppers

HGB-Series GRAVITROL® Weigh Hoppers

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Designed for use as part of the Gravitrol® system, the HGB Series Weigh Hopper incorporates engineering and design breakthroughs to help achieve the optimal result in extrusion: a uniform product within tolerance at the lowest possible manufacturing cost.

The Gravitrol® system gives you total control over your mono-extrusion or coextrusion processes. The system can be configured to control extruder rate by weight; layer percentages by weight; weight of extrudate by length; average thickness; and pipe or tube diameter.

The HGB Series Weigh Hopper is a central part of this system because it precisely monitors the amount of material consumed by the extruder. In effect, the extruder becomes a gravimetric metering ...

HG Series 2

HG-Series 2 GRAVITROL® Weigh Hoppers

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Designed for use as part of the Gravitrol® system, the HG Series 2 Weigh Hopper incorporates engineering and design breakthroughs to help achieve the optimal result in extrusion: a uniform product within tolerance at the lowest possible manufacturing cost.

The Gravitrol® system gives you total control over your monoextrusion or coextrusion processes. The system can be configured to control extruder rate by weight; layer percentages by weight; weight of extrudate by length; average thickness; and pipe or tube diameter.

The HG Series 2 Weigh Hopper is a central part of this system because it precisely monitors the amount of material consumed by the extruder. In effect, the extruder becomes a gravimetric metering ...
B&R Drive

B&R-Series GRAVITROL® Extruder Drive Speed Control Module


Process Control's Graviton® Gravimetric Extrusion Control Systems automates the control of any extrusion line -- coextrusion or mono extrusion - on the basis of weight.

A standard system has an HG Series Weigh Hopper mounted on each extruder to measure the extruder's weight throughput. The weigh hopper reports the measurement to the EXB2 central computer, which controls the extruder drive and/or takeoff device drive. Alternatively, Process Control X Series and Guardian® blenders can monitor extruder throughput and control the extruder drive and take-off device. In both cases, the B&R Drive Speed Module and the B&R Line Speed Control Module provide the interface for this communication.

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Gravimetric Extrusion Control for X-Series Blenders

Gravimetric Extrusion Control for X-Series Blenders


PROCESS CONTROL "X" Series blenders can be equipped with extrusion control software to allow the blender to control the extruder and line speed on mono extrusion lines for consistent output by weight. The only additional hardware needed is an B&R extruder drive control module and, if line speed is to be controlled, an B&R line speed control module.

Gravitrol® extrusion control offers the benefits of improved product quality, reduced material usage, quicker startups and product changeovers, reduced scrap, and improved product repeatability. At the same time, it reduces the operator's workload by maintaining a consistent output, regardless of screen pack or material variations.

The system uses Process ...
SCADA 7

Process Manager


Integration by PCC means no third party integrators necessary.
Complete SCADA/DCS solutions from scratch OR add on to your exsisting solutions.
Monitor fully integrated systems from a centralized location.
Connectivity with your protocals: Modbus RTU and Modbus IP,
Allen-Bradley E/IP and CIP, Profibus DP, Profinet
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