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Automatic Delay Tube Oil Filling and Assembly Machine for Hydraulic Magnetic Circuit Breakers
This automated machine for filling and assembling time-delay tubes integrates the complete processing steps for the time-delay components (oil cup/damping tube) used in hydraulic-magnetic circuit breakers. A dual-channel vibratory feeding system aligns the time-delay tubes and high-permeability plungers in parallel; a pneumatic station precisely presses the plunger into the tube cavity; an air-controlled dispensing system injects a precise, bubble-free dose of silicone-based damping oil; and finally, an X-Y dual-axis module arranges the finished assemblies into a positioning tray in a preset M×N matrix.
Since the time-delay characteristics of oil-damped circuit breakers depend on the damping oil within the tube, filling precision is the core capability of this equipment. An air-controlled stainless steel pressure tank supplies oil to a micro-dispensing valve, ensuring that an identical, bubble-free amount of damping oil is injected into each tube; this guarantees absolute consistency in time-delay performance across the entire production run. Fixtures, feeding tooling, and tray arrangement programs are all customized based on the customer-provided drawings of the time-delay tubes and plungers.
Standard delivery: 60 working days | Bubble-free quantitative oil filling | One tray every 20–30 seconds
What is a Delay Tube Oil Filling and Assembly Machine?
In a hydraulic magnetic circuit breaker, the time-delay behavior comes from an oil-damped delay tube (also called an oil cup or damping tube): a high-permeability plunger travels inside a sealed tube filled with silicone damping oil, and the oil’s resistance to that movement defines the breaker’s delay curve. This makes the delay tube one of the most precision-sensitive subassemblies in the entire breaker — too much oil, too little oil, or trapped air bubbles all shift the delay characteristic and create unit-to-unit inconsistency that is very difficult to correct downstream. A delay tube oil filling and assembly machine automates this critical process end to end. Dual-channel vibration bowls orient and feed the delay tubes and plungers separately; an assembly station physically combines them by seating the plunger into the tube cavity; a quantitative dispensing system built around a pneumatic stainless steel pressure tank and a micro dispensing valve injects a precisely metered, bubble-free dose of damping oil; and an XY dual-axis pick-and-place module arranges the finished assemblies into positioning trays in a programmable M × N matrix, ready for the next production step. As a non-standard custom machine, the feed tooling, insertion fixtures, dispensing parameters, and tray programs are engineered around your specific tube geometry, plunger design, and oil specification.
Delay tubes and plungers are oriented and fed automatically in parallel by two vibration bowls.
A cylinder-driven assembly station seats the high-permeability plunger into the tube cavity.
Pneumatic stainless steel pressure tank + micro dispensing valve deliver a metered dose of silicone damping oil.
A pick-up nozzle places finished parts into positioning trays in a programmed M × N array.
Assembly Process & Key Stations
Technical Specifications
| Applicable product | Delay components (oil cup / damping tube) of hydraulic magnetic circuit breakers, customized to part drawings |
|---|---|
| Process stations | Dual vibratory feeding → plunger insertion → quantitative oil dispensing → XY matrix tray loading |
| Feeding method | Dual-channel vibration bowls with automatic orientation — one channel for delay tubes, one for plungers |
| Insertion method | Cylinder-driven assembly station; plunger seated precisely into the delay tube cavity |
| Oil dispensing system | Pneumatically controlled stainless steel pressure tank + micro dispensing valve; quantitative, bubble-free silicone damping oil filling |
| Tray loading | XY dual-axis module with pick-up nozzle; programmable M × N matrix placement onto positioning trays |
| Production capacity | 20–30 seconds per tray (one full M × N positioning tray per cycle) |
| Control system | Omron PLC with MCGS HMI touch screen; AirTac pneumatic cylinders; Delixi RCBO circuit protection |
| Power & air supply | 220V, 50Hz, 10kW | Compressed air required for pneumatic stations |
| Machine dimensions | L800 × W600 × H1500 mm — compact footprint for laboratory or line-side installation |
| Delivery time | 60 working days |
Detailed Process Flow
The machine completes the delay tube subassembly in four automatic stations:
- Dual vibratory feeding – Two vibration bowl channels orient and feed the delay tubes and the plungers separately and simultaneously.
- Automatic plunger insertion – The assembly-station cylinder seats the plunger precisely into the delay tube cavity, completing the physical combination of the core components.
- High-precision quantitative oil dispensing – The pneumatically controlled stainless steel pressure tank feeds the micro dispensing valve, which injects a metered, bubble-free dose of silicone damping oil into the tube — ensuring absolute consistency of the breaker’s time-delay characteristic.
- XY matrix tray loading – Following the preset coordinate program, the pick-up nozzle places the assembled and filled semi-finished parts into the positioning tray in a neat M × N matrix arrangement.
Core Technical Advantages (Custom Non‑Standard Design)
Delay-characteristic consistency
The metered, bubble-free oil dose is the single most important factor in a uniform delay curve. Machine-controlled dispensing removes the volume variation and trapped air that manual filling inevitably introduces.
Fully automatic core process
Feeding, insertion, filling, and tray loading run without manual part handling — eliminating contamination, handling damage, and operator-to-operator variation on a precision-sensitive subassembly.
Clean, controlled dispensing hardware
A stainless steel pressure tank under pneumatic control and a micro dispensing valve deliver repeatable micro-volumes of silicone oil, keeping the process clean and the dose stable over long production runs.
Tray-ready output for downstream automation
The M × N positioned tray output feeds directly into your subsequent assembly or testing processes — no re-orientation or manual sorting needed between steps.
Trusted by industry leaders
Applications and Integration
Custom Engineering & Delivery
Request a Custom Oil Filling and Assembly Machine Quote
Send us your delay tube and plunger drawings, damping oil specification, and production targets. Our engineers will configure the feeding, insertion, dispensing, and tray loading stations around your exact component design.
WhatsApp: +86 150 5837 0007 | Email: xsb@benlongkj.cn | English & Chinese support
Why Choose Benlong for Oil Filling Automation?
- 15+ years designing assembly and testing equipment for low‑voltage electrical products
- Quantitative, bubble-free silicone oil dispensing engineered for consistent time-delay characteristics
- Complete process in one machine: dual vibratory feeding, plunger insertion, oil filling, and XY matrix tray loading
- Fixtures and tray programs customized to your tube and plunger drawings
- Global service and spare parts support
Typical Custom System Includes
Automatic oil filling and assembly equipment consisting of: · Dual-channel vibration bowl feeders; AirTac cylinder-driven insertion station; Pneumatic stainless steel pressure tank; Micro dispensing valve; XY dual-axis tray loading module with pick-up nozzle; Positioning trays; Omron PLC with MCGS HMI; Delixi RCBO circuit protection; Installation commissioning; One-year warranty
Related solutions
Frequently Asked Questions
The delay tube (oil cup / damping tube) is the component that gives a hydraulic magnetic circuit breaker its time-delay behavior: a plunger moves through silicone damping oil inside a sealed tube, and the oil’s resistance defines the delay curve. Oil volume variation or trapped air bubbles directly shift that curve, so metered, bubble-free filling is essential for unit-to-unit consistency.
Two components per assembly: the delay tube and the high-permeability plunger (moving iron core). Both are fed by dedicated vibration bowl channels, and the feed tooling and insertion fixtures are customized to your specific part drawings.
The silicone damping oil is held in a stainless steel pressure tank under pneumatic control and delivered through a micro dispensing valve. This combination injects the same metered dose into every tube without introducing air, keeping the delay characteristic consistent across the entire production run.
An XY dual-axis module with a pick-up nozzle places the assembled and filled parts into positioning trays following a preset coordinate program, arranged in an M × N matrix. The tray output is ready for direct transfer to your downstream assembly or testing processes.
Drawings or physical samples of your delay tube and plunger, the damping oil specification, your target capacity, and your tray or downstream integration requirements. Our engineers will then propose the machine configuration for your product. Standard manufacturing delivery is 60 working days.
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