Quick Answer
Gravimetric blending helps reduce material waste by accurately measuring ingredients by weight and maintaining consistent blend ratios from batch to batch. Because gravimetric feeders typically maintain accuracy within ±1% of the target feed rate, processors can achieve greater control over material usage, recipe consistency, and blend quality. AEC’s BD Series Gravimetric Blenders combine precision ingredient metering, industry-leading mixing performance, and flexible recipe control to support efficient plastics processing operations.
Why Material Accuracy Matters in Plastics Processing
Material waste can impact efficiency, increase material consumption, and make it more difficult to maintain consistent production results. Whether you’re processing virgin resin, regrind, color concentrates, or additives, maintaining accurate material ratios is critical to achieving a consistent final product.
One way processors improve material control is through gravimetric blending.
But how does gravimetric blending help reduce material waste?
What Causes Material Waste in Plastics Processing?
Material waste can occur when ingredients are not consistently metered or mixed throughout the production process.
When material ratios vary from batch to batch, processors may have difficulty maintaining consistent formulations and repeatable results. This becomes even more important when processing multiple ingredients such as virgin resin, colorants, and additives.
Maintaining accurate blend ratios helps support greater consistency and improved material utilization.
How Does Gravimetric Blending Help Reduce Material Waste?
Gravimetric blending measures materials by weight rather than relying solely on volume. By accurately controlling ingredient ratios, processors can achieve more consistent batches and improved recipe accuracy.
Because each ingredient is weighed before entering the blend, gravimetric blending helps maintain tighter control over material formulations. This level of precision allows processors to better manage material usage and support consistent production goals.
How Does Better Blend Accuracy Help Reduce Material Waste?
AEC’s BD Series Gravimetric Blenders feature precision ingredient metering using diamond slide gates capable of dispensing as few as five pellets per pulse. Combined with a precision 0.02% span-accurate cantilever load cell weight system, the blender is designed to achieve highly accurate material dosing.
Gravimetric feeders typically maintain accuracy within ±1% of the target feed rate, helping processors achieve consistent ingredient ratios and improved recipe control. By accurately delivering each ingredient according to the recipe, processors can maintain greater control over material formulations and improve batch-to-batch consistency.
Why Is Mixing Quality Important?
Accurate dosing is only part of the blending process. Once materials are dispensed, they must also be thoroughly mixed.
The BD Series features a newly designed high-efficiency mixing paddle engineered to deliver exceptional mixing performance. By pulling material from the corners of the mix chamber and virtually eliminating dead zones, the paddle helps produce a more homogeneous blend and consistent batch-to-batch results.
The result is improved blending consistency throughout the entire batch, helping processors maintain the material formulation they intended to create.
Can Gravimetric Blending Help Process Regrind Materials?
Yes.
Many processors incorporate regrind material into their production process to maximize material utilization. However, regrind materials can present unique feeding challenges due to differences in size, shape, and flow characteristics.
The BD Series Gravimetric Blender includes an oversized square gate assembly specifically designed for regrind applications. This allows processors to accurately introduce regrind material into the blend while maintaining recipe consistency and material control.
By accurately incorporating regrind into the blending process, manufacturers can better manage material usage while maintaining consistent blend quality.
What Features Help Maintain Consistent Results?
The BD Series includes several features designed to simplify operation and support repeatable blending performance:
- 7-inch high-resolution color touchscreen interface
- Allen-Bradley Micro850 PLC controls
- Three recipe entry modes
- Storage for up to 100 recipes
- Remote monitoring and control capabilities
- Ethernet connectivity
- SCADA integration capability
- Tool-free cleaning and maintenance
- Safety-interlocked access system
- E-mail alert capability
These features help processors manage recipes, monitor performance, and maintain consistent operation across multiple production runs.
How Can the AEC BD Series Gravimetric Blender Help Reduce Material Waste?
The BD Series was designed to combine precision metering, exceptional mixing quality, and operator-friendly controls into a single blending platform.
With highly accurate ingredient dosing, homogenous batch mixing, and flexible recipe management, the BD Series helps processors maintain better control over the materials entering their process. This combination of blend accuracy and mixing consistency can support improved material utilization and more repeatable production results.
The system is suitable for injection molding, extrusion, blow molding, and other plastics processing applications where material accuracy and consistency are critical.
Are There Other AEC Blending Solutions Available?
Yes.
While the BD Series Gravimetric Batch Blending System is an excellent solution for many batch blending applications, AEC offers additional blending technologies designed to support different materials and processing requirements.
OA Series Gravimetric Blender
The OA Series Gravimetric Batch Blending System utilizes precision auger metering for all ingredients. These systems are particularly well-suited for applications requiring multiple regrind materials or materials that can be difficult to meter.Features such as precision auger feeding, span-accurate load cells, target-versus-actual setpoint verification, and heavy-duty industrial construction help provide reliable batch control and blending performance.
AccuMeter™ Ovation AMO Series Continuous Loss-in-Weight Blender
For continuous extrusion applications, AEC offers the prestigious AccuMeter™ Ovation AMO Series Continuous Loss-in-Weight Blender, a well-established solution known throughout the plastics industry for continuous gravimetric blending performance
Unlike a batch blender, the AccuMeter™ Ovation continuously learns the extruder rate and automatically adjusts individual feeder outputs to maintain the desired ingredient ratios. This helps provide a continuous homogeneous blend throughout the extrusion process while providing inventory tracking, material usage information, and recipe management capabilities.
Selecting the right blending solution depends on material characteristics, throughput requirements, processing method, and production objectives.
AccuMeter™ Prestige Series Continuous Loss-in-Weight Blender
For processors requiring exceptional flexibility, throughput capacity, and continuous gravimetric blending accuracy, AEC offers the AccuMeter™ Prestige Series Continuous Loss-in-Weight Blender. The Prestige Series is designed to accommodate feed rates ranging from 50 grams per hour to 16,500 pounds per hour and can support up to eight precision feeders per extruder and 16 feeders per controller.
Like other continuous loss-in-weight systems, the AccuMeter™ Prestige continuously monitors material flow and automatically adjusts individual feeders to maintain the exact ingredient ratios required by the process. With a cumulative dosing accuracy of ±0.5%, variable-speed drive technology, and self-calibration capabilities, the system helps reduce material overfeeding while supporting consistent product quality and improved material utilization.
Its modular design provides flexibility for changing production requirements and allows processors to accurately meter pellets, micro-pellets, powders, and regrind materials. Additional features such as feeder trending, inventory tracking, material usage reporting, full diagnostics, and user-friendly touchscreen controls make the AccuMeter™ Prestige a powerful solution for extrusion applications where precise ingredient control and operational efficiency are critical.
