OYANG Paper Bag Machine: High-Speed Converting Lines from OYANG Packaging
Engineered to eliminate operational downtime in commercial and food-grade sack manufacturing, the OYANG paper bag machine portfolio from OYANG packaging spans automated roll-fed roll-to-bag systems, SOS square-bottom configurations, and inline handle applicators running at up to 180–220 bags/min. Driven by dynamic multi-axis servo synchronization, precision web tension controls, and automated dimensional changeover completed in under 2 minutes, OYANG converting platforms process 60–180 gsm kraft papers with verifiable dimensional accuracy across retail, e-commerce, and fast-food packaging applications.
Kinematic Diagnostics: Eliminating Speed Bottlenecks in Paper Bag Conversion
In high-capacity paper bag conversion, conventional mechanical cam-driven equipment routinely fails to sustain continuous production above 120 bags/min. Industrial converters encounter three persistent engineering bottlenecks:
1. Web Tension Drift & Gusset Jamming
As primary paper roll diameters step down from 1,200 mm to core exhaustion, passive braking causes instantaneous tension spikes. This tension imbalance skews the tube-forming plates, producing skewed M-side gusset folds and frequent machine trips.
2. Adhesive Squeeze-Out & Cavitation
Traditional gravure bottom-gluing wheels create centrifugal adhesive throw at rotational speeds corresponding to >160 bags/min. Excess water-based adhesive contaminates transfer cylinders, while insufficient glue lines cause catastrophic bottom blowouts under load.
3. Handle Patch Registration Error
Inline flat or twisted-handle making systems that rely on open-loop chains suffer cumulative pitch expansion. At high line velocities, patch misalignment drops handle tear strength and forces manual batch sorting.
By implementing distributed servo drives and closed-loop load-cell feedback, modern high-efficiency lines stabilize web motion throughout tube forming, rotary cutoff, bottom opening, gluing, and discharge compaction.
OYANG Packaging Core Lines: SMART & TECH Converting Systems
Figure 1: SMART-17 High-Speed Roll-Fed Paper Bag Production Line (180–220 Bags/Min Continuous Output).
Within the OYANG packaging machinery division, the flagship SMART-17 and TECH-18 models represent a fundamental departure from rigid mechanical linkages. Each converting function—from active unwinding and side-creasing to drum rotation and finger claw opening—is driven by independent servo axes synchronized via industrial Ethernet, providing precise electronic camming and repeatable bag geometry.
Engineering Specifications: OYANG Paper Bag Machinery Range
The following comparison details functional parameters across high-throughput roll-fed and inline handle pasting configurations:
| Machine Platform | Production Velocity | Bag Width & Bottom Dimension | Paper Grammage | Changeover Architecture |
|---|---|---|---|---|
| TECH-18 Auto Size Change | 150–200 bags/min | Width: 220–450 mm | Bottom: 80–180 mm | 70–160 gsm Kraft / Ribbed Paper | Full-Servo Auto Change ≤ 2 Minutes |
| SMART-17 High-Speed Line | 180–220 bags/min | Width: 150–330 mm | Bottom: 70–180 mm | 60–150 gsm Kraft / Food Paper | Digital Calibrated Mechanical Setup |
| SMART-17 AS (Flat Handle Inline) | 120–160 bags/min | Width: 200–350 mm | Bottom: 80–160 mm | 70–140 gsm Kraft with Fold-in Handle | Integrated Inline Handle Applicator |
| OYANG 16A (Twisted Rope Handle) | 100–150 bags/min | Width: 220–450 mm | Bottom: 90–200 mm | 80–180 gsm Premium Retail Kraft | Inline Rope Twisting & Hot-Melt Patch |
Structural Rigidity: OKUMA & MAZAK CNC Machining Standards
The longevity and dynamic registration of any OYANG paper bag machine are anchored in in-house fabrication rigor. Within OYANG’s 130,000 m² smart production center, all critical side frames, main drum cylinders, and rotary cutter housings undergo high-precision multi-axis machining.
- Milled Solid Wall Plates: Utilizing solid structural cast iron processed on Japanese OKUMA machining centers to a tolerance of ≤ 0.015 mm, eliminating vibration transfer at 220 cuts/min.
- Dynamic Cylinder Balancing: Main bottom-forming and cutoff drums are dynamically balanced to ISO 1940 G2.5, preventing bearing runout and eccentric web pulls during extended shifts.
- Centralized Gear Lubrication: Enclosed oil-bath gear drives ensure uniform thermal dissipation, mitigating thermal expansion errors during 24/7 manufacturing cycles.
Verified Machine Operation & Technical Documentation
Review actual line speeds, inline handle folding operations, and complete structural data via official engineering resources:
Related Engineering Guides & Technical Resources
Deepen your knowledge of secondary finishing, converting automation, and technical benchmarks across our manufacturing ecosystem:
- Best Non Woven Bag Making Machine: Brands Benchmarked & Kinematic Analysis — A technical evaluation of frame rigidity, servo topology, and ultrasonic reliability.
- OYANG Leader Machine: High-Speed Nonwoven Box Bag Converting Solution — Technical parameters, rapid mold change architectures, and integrated handle systems.
Frequently Asked Questions (FAQ)
What paper grades and grammages can an OYANG paper bag machine process?
OYANG paper bag machinery accommodates virgin brown kraft, white bleached kraft, ribbed kraft, greaseproof paper, and coated/laminated barrier paper substrates spanning a grammage window of 60 gsm to 180 gsm without compromising line tension or bottom fold accuracy.
How does the TECH-18 achieve a complete size changeover in under 2 minutes?
The TECH-18 integrates a multi-axis bus-servo sizing system. By inputting bag length, bag width, and bottom dimensions into the central HMI, high-torque servo drives automatically reposition the tube forming plates, creasing discs, and bottom opening fingers simultaneously, reducing setup times from 2–3 hours to under 2 minutes.
Can OYANG packaging lines integrate inline printing and handle manufacturing?
Yes. Models like the SMART-17 AS and OYANG 16A feature synchronized inline modules for manufacturing either flat fold-in handles or twisted paper rope handles. Additionally, upstream lines can be coupled directly with 2-color or 4-color inline flexographic printing units to print, form, paste handles, and stack in one continuous pass.
How does OYANG control bottom glue consistency at speeds exceeding 200 bags/min?
OYANG paper bag systems utilize closed-loop, speed-proportional adhesive dispensing stations equipped with doctor blade metering and diaphragm fluid recirculators. This delivers precise adhesive volume directly proportional to web linear speed, preventing centrifugal splatter and adhesive starvation across variable production runs.