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(© 2023 Movacolor) |
Movacolor, a prominent player in dosing and blending solutions for plastics processing, announced the launch of the MCS Continuous Loss-in-Weight Blender, a new continuous system to deliver fast-response control in extrusion processes where throughput can change drastically over short periods.
In industries such as filament yarn production, melt pump interruptions can cause sudden and frequent output fluctuations. These changes often lead to unstable material flow, inconsistent blend ratios, increased scrap, and rising material costs. While traditional continuous loss-in-weight systems offer high accuracy, many are limited in how quickly they can react when extruder demand changes rapidly.
The MCS Continuous Loss-in-Weight Blender has been developed specifically to address this challenge.
A New Approach to Gravimetric Dosing
Unlike traditional in-line systems where dosing units feed directly into the machine inlet, the MCS Continuous Loss-in-Weight Blender is designed with a weighing hopper positioned underneath the dosing machines. In this configuration, all dosing units feed into a weighing hopper with a hopper level sensor.
Because the exact hopper capacity and target material level are continuously known and monitored, the system can rapidly adjust dosing speeds to maintain a stable level in the hopper, even during sharp throughput changes. This enables stable feeding behaviour and consistent blending performance under conditions where conventional systems struggle to respond fast enough.
Key Benefits
• Fast response to throughput fluctuations.
• Rapid dosing corrections maintain a stable hopper level and consistent feeding performance.
• Reduced scrap and material waste.
• Fewer off-spec products during pump interruptions and ramp-ups.
• Lower material costs and higher ROI.
• Improved dosing control reduces overdosing and helps maintain operation closer to setpoint.
• Especially suited to applications such as filament yarn extrusion, where throughput changes frequently.
“Even at very low extruder capacities of 20 to 30 kg/h and masterbatch additions of just 1%, the system remains stable and accurate. In addition, the high-temperature-ready design makes it fully suitable for PET processing, opening up applications that are not reliably supported by alternative solutions,” said Klaas Talsma, Product Manager at Movacolor.
