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MANUFACTURING
ISO-Certified
Automatic Door Closer & Magnetic Lock Factory
At OUBAO, you get custom door closers and magnetic door locks engineered for real-world use—from hotel rooms and meeting rooms to residential homes, fire doors, and security doors.
We manage the full production cycle in-house—from die casting, mold development and CNC machining to assembly and oil filling—ensuring stable quality and controlled delivery. With 9 die-casting machines, 100 CNC machines, and 25 robotic arms, your orders are produced with stable precision at scale.
Backed by a 6S quality management system and MES traceability, each unit undergoes functional and durability testing before shipment. This level of control allows us to deliver 6 million door closers and 1.5 million magnetic locks annually, with a standard lead time of 35 days—20–35% faster than typical trading suppliers.
Authorized National Patents for Core Technology
Massive Vertical Manufacturing Base
New Certified Series Annually
Door Control
Innovation
Performance Tuning
>Custom Structure
>Strategic Co-Creation
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Automatic Door Closer & Magnetic Lock Factory
Precision CNC Machining Control
Equipped with over 100 advanced CNC machines, our process integrates precision boring and honing to control piston-to-cylinder clearance within 0.005–0.015 mm. Micron-level accuracy enhances hydraulic sealing and minimizes the risk of oil leakage from the start.
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High-Pressure Die-Casting Structure
Using cold chamber die-casting machines, aluminum housings are formed in one piece with high density and no internal porosity. The structure resists repeated hydraulic impact, maintaining strength and dimensional stability over long-term use.
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Vacuum Automatic Oil Filling System
Oil filling is performed under a 100% vacuum environment, eliminating internal air bubbles and improving sealing integrity to reduce the risk of oil leakage. Combined with FUCHS hydraulic oil, our door closers maintain stable closing performance across temperatures from -45°C to 50°C.
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One-Piece CNC Integrated Shaping
Machining the lock body from a solid block of DT4-C electrical iron eliminates magnetic flux leakage at the source. This seamless structural integrity guarantees a solid-state holding force of 1200 lbs (545 kg), ensuring silent, vibration-free security without the risk of mechanical fatigue.
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Anodic Hardened Brushed Treatment
Our anodic process builds a 15-20 micron non-conductive barrier that goes far beyond mere aesthetics. Engineered to repel acidic fingerprints and harsh industrial cleaners, the premium brushed finish preserves your hardware’s prestigious luster even in the most demanding architectural environments.
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Eco-Friendly Multi-Layer Plating
Sustainable, heavy-metal-free plating cycles provide a robust shield capable of withstanding 96-120 hours of neutral salt spray. By effectively isolating the internal core from coastal humidity, this eco-conscious treatment keeps your locking system responsive and rust-free for decades.
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