How the SDH-R Rotary Filling Machine Works
A deep dive into the engineering behind the SDH-R — from rotary indexing mechanics to servo-driven precision filling and Modified Atmosphere Packaging.
The Rotary Filling Process
Five integrated stations work in parallel within the SDH-R\'s compact rotary carousel, processing multiple cups simultaneously.
Rotary Indexing
The heart of the SDH-R is its rotary turntable—a precision-machined carousel that indexes cups through each station in a continuous circular motion. Unlike linear systems that move cups in a straight line, rotary indexing allows multiple operations to occur simultaneously on different cups, dramatically increasing throughput within a minimal footprint.
Servo-Driven Filling
Each filler station uses servo motors controlled by the PLC to deliver exact product volumes with every cycle. Servo drives offer superior accuracy compared to pneumatic systems—typically ±0.5% fill weight consistency—because they use electronic position feedback rather than air pressure, which fluctuates with temperature and supply variations.
Heat Sealing
Roll-stock film is drawn across the cup opening and heat-sealed to create an airtight, tamper-evident closure. The sealing station uses precisely controlled temperature and dwell time to ensure consistent seal integrity across every cup—critical for maintaining product freshness and meeting retail packaging standards.
MAP Nitrogen Flushing
Before sealing, the optional Modified Atmosphere Packaging (MAP) system displaces oxygen inside the cup with food-grade nitrogen, reducing residual oxygen levels to 0.3–0.4%. This dramatically extends shelf life for perishable products like hummus and dips, often doubling or tripling refrigerated shelf life compared to standard sealing.
Lid Application
The final station uses an automated Pick and Place system to apply over-top plastic lids. The snapping device ensures consistent lid alignment and secure closure—providing the consumer-friendly, resealable packaging that retailers demand for grab-and-go dip products.
The Servo-Driven Advantage
Why servo-driven filling machines outperform pneumatic and mechanical alternatives in precision, efficiency, and total cost of ownership.
Fill Weight Accuracy
Servo-driven piston fillers achieve ±0.5% accuracy, minimizing product giveaway and ensuring regulatory compliance with net weight requirements.
Faster Changeovers
Digital recipe storage in the PLC means switching between products takes minutes, not hours. Save fill volumes, speeds, and sequences for instant recall.
Reduced Maintenance
Servo motors have fewer wearing parts than pneumatic cylinders. No air seals to replace, no regulators to calibrate—just precise, repeatable motion.
Programmable Flexibility
Adjust fill speed, volume, and sequence through the touchscreen HMI. Create and store unlimited product recipes without mechanical adjustments.
Energy Efficiency
Servo systems consume power only during motion, unlike compressed air systems that run continuously. Lower operating costs over the machine's lifetime.
Consistent Output
Electronic position feedback maintains fill accuracy regardless of product temperature, viscosity changes, or ambient conditions.
Rotary vs. Inline Filling Machines
Understanding the fundamental differences between rotary and inline filling architectures—and why rotary is the smart choice for compact, mid-scale production.
| Feature | Rotary (SDH-R) | Inline |
|---|---|---|
| Footprint | Compact (44" × 52") | Long (often 10–20 ft) |
| Throughput | Up to 30 CPM | Typically 10–15 CPM |
| Simultaneous Operations | Multiple stations run in parallel | Sequential, one at a time |
| Changeover Time | Minutes (digital recipe recall) | Often 30–60 minutes |
| Floor Space Efficiency | Excellent | Poor for equivalent output |
| Multi-Component Filling | Up to 3 fillers in one footprint | Requires extended line length |
| Best For | SMEs, limited floor space, multi-product | High-volume, single-product lines |
See the Technology in Action
Schedule a virtual demo or visit our facility in Calgary, Alberta. We'll walk you through every station of the SDH-R.