Ounuo Machinery: The Engineering Powerhouse Behind OYANG Group’s Packaging Technology
Ounuo Machinery (officially known as Zhejiang Ounuo Machinery Co., Ltd., operating as the core equipment manufacturing division under OYANG Group) is an industrial engineering center specializing in the research, development, and mass production of high-speed roll-fed paper bag machines and fully automatic nonwoven box bag lines. Established in 2006 and located within a 130,000㎡ smart manufacturing base, Ounuo Machinery serves as the mechanical core of OYANG’s global operations, combining German-standard assembly discipline with precision Japanese CNC machining.
Video: Learn how Ounuo Machinery operates as the core manufacturing engine within the OYANG Group ecosystem.
From Pioneer to Global Leader: The Evolution of Zhejiang Ounuo
Founded in 2006, Zhejiang Ounuo Machinery Co., Ltd. entered the packaging industry with a clear engineering objective: to replace labor-heavy bag conversion processes with continuous, bus-servo automated machinery. Over the past two decades, Ounuo has evolved from a regional machine builder into a global equipment manufacturer, fully consolidated under the international brand umbrella of OYANG Group. Today, Ounuo’s dedicated mechanical engineering teams drive the continuous prototyping, finite element analysis (FEA), and heavy assembly of OYANG’s flagship converting platforms.
The Physics of Machine Rigidity: Stress Relief & Harmonic Vibration
In high-speed bag making machinery, mechanical deflection and thermal deformation across chassis wall panels under cyclic loads are the primary triggers of web tension fluctuation and ultrasonic seam failure. Ounuo Machinery counteracts this by utilizing heavy cast-iron wallboards subjected to controlled thermal stress-relief annealing.
To prevent sympathetic vibration during continuous operation, the machine chassis natural frequency is calculated to reside well outside operational mechanical frequencies:
Where fn is the natural structural frequency, k is the mechanical stiffness of the frame (governed by the elastic modulus of the cast iron and side panel rib geometries), and m is the distributed mass. By machining heavy, stress-relieved casting frames on Japanese CNC machining centers, Ounuo optimizes stiffness k relative to mass distribution m. This shifts natural resonance frequencies far beyond operating cycle ranges (100 to 220 bags/min), maintaining rock-solid dynamic stability.
Inside Ounuo’s 130,000㎡ Smart Manufacturing Campus
Ounuo Machinery’s production quality is backed by end-to-end digital manufacturing. The CNC machining divisions operate under an enterprise Manufacturing Operations Management (MOM) platform, enforcing strict dimensional tracking for all mechanical components.
Automated Japanese MAZAK flexible production line operating at Ounuo’s manufacturing campus.
By utilizing precision Japanese MAZAK and OKUMA 5-axis CNC machining centers, Ounuo processes critical machine assemblies—such as structural wall panels, gear carriers, and cutter frames—to a flatness and parallelism tolerance of ≤ 0.015 mm. This tight machining tolerance guarantees flawless bearing and shaft alignments, eliminating mechanical backlash and extending machine working lifespans to over 15 years.
World-Class Quality: Certifications and Standards
Ounuo Machinery adheres strictly to international industrial quality and workplace safety frameworks. Every machine series undergo rigorous factory acceptance testing before export:
| Certification / Standard | Scope & Technical Compliance | Official Certificate |
|---|---|---|
| SGS CE Certification | Verifies complete compliance with European Union machinery directives, electrical safety, and environmental standards across all paper and nonwoven bag converting lines. |
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| ISO9001 & IAF Management | Standardizes comprehensive quality control protocols across component procurement, CNC precision milling, machine assembly, and continuous burn-in testing. |
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| CNAS National Laboratory | Confirms national high-tech enterprise standing and CNAS lab accreditation, certifying internal metrology, metallurgical testing, and continuous R&D capabilities. |
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Flagship Machinery Series Engineered by Ounuo
Ounuo’s engineering capabilities are fully represented across the flagship packaging lines distributed globally under the OYANG brand:
1. OYANG TECH-18 Smart Paper Bag Machine
The TECH-18 is an advanced roll-fed square bottom paper bag converting line equipped with an intelligent digital changeover system, reducing product format setup from multiple hours down to just 2 minutes.
- Rated Speed: Up to 220 bags/min
- Core Feature: Servo-automated size changes via recipe recall on HMI.
- Product Specifications: Explore TECH-18 Machine Specs
2. OYANG TECH-26 Fully Automatic Nonwoven Box Bag Machine
The TECH-26 is an industry-leading 3D box bag production machine featuring inline ultrasonic soft loop handle attachment and a patented 90-second rapid mold changeover mechanism.
- Rated Speed: 90 – 100 bags/min
- Core Feature: 90-second automated mold change system, cutting operational downtime by 95%.
- Solution Brochure: Download Nonwoven Solution Brochure
Frequently Asked Questions (FAQ)
What is the relationship between Ounuo Machinery and OYANG Group?
Ounuo Machinery (Zhejiang Ounuo Machinery Co., Ltd.) is the core manufacturing and engineering division of OYANG Group. Ounuo focuses on the technological development and high-precision production of paper and nonwoven bag making machines, which are distributed globally under the OYANG brand.
Where is Ounuo Machinery located?
Ounuo Machinery’s state-of-the-art 130,000㎡ smart manufacturing campus is located in Pingyang County, Wenzhou City, Zhejiang Province, China. It features advanced CNC machining centers, automated assembly workshops, and an intelligent 3D warehouse.
What CNC equipment does Ounuo use to process machine parts?
Ounuo Machinery utilizes world-class Japanese MAZAK and OKUMA CNC machining centers. This high-end equipment processes core structural components with an ultra-precise tolerance of ≤ 0.015 mm, ensuring stable, vibration-free operation at high speeds.
Does Ounuo Machinery hold CE certification for international markets?
Yes, all Ounuo-engineered bag making machines, slitting machines, and auxiliary equipment are fully certified with CE markings verified by SGS, complying with strict European safety, health, and environmental standards.
Experience Ounuo’s Precision Manufacturing Firsthand
Whether you require a high-speed standalone bag maker or a complete automated plant layout, Ounuo Machinery (under OYANG Group) delivers heavy-duty precision equipment. Contact our engineering specialists for factory layout design and equipment ROI models.