EI-86 automatic lamination stacking machine - inserts E & I silicon steel laminations into transformer coil bobbins under PLC control, holding ±0.1 mm stack accuracy at up to 250 stacks per minute for 280-600 VA cores.
The EI-86 is built for one job that decides nearly everything downstream: putting every E and I lamination in the right place, in the right count, at the right tightness, thousands of times per shift. It serves the 280-600 VA band used in welding equipment and elevator control transformers - two industries that need the same machine for very different reasons.
±0.1 mmStacking accuracy
250 / minStacking speed
280-600 VAEI core range
12 monthsWarranty
Two Industries, Two Reasons to Care About the Stack
Welding transformers live a hard life. They are pushed into short-circuit-like loads during strike and arc, repeatedly surge far beyond rated current, and run in workshops with conductive dust and spatter in the air. A core with an uneven stack or a bruised lamination coating develops hot spots under that duty, and the transformer that was fine on day one starts tripping thermal protection in month six.
Elevator control transformers fail differently: they fail quietly. They sit in a machine room untouched for years, supplying control, door operator and brake circuits, and their reliability is only tested when someone is inside the car. A loose stack that buzzes or drifts in air gap shows up as intermittent control faults that are expensive to trace, because no one suspects the transformer first.
The EI-86 addresses both by removing operator judgement from the stack: every lamination is placed, counted and compressed the same way, from the first core of a batch to the thousandth.
What the Machine Controls
Interlaminar Insulation Stays Intact - Gentle handling and ±0.1 mm placement avoid the microscopic coating damage that turns into eddy-current heat under welding duty.
Stable Effective Air Gap - ±0.02 mm positioning accuracy keeps magnetizing current and secondary voltage on target, so control circuits see the same supply year after year.
Exact Lamination Count - The PLC counts every sheet, so the stack height matches the design instead of the operator's eye.
Uniform Compression - Consistent stack tightness removes the loose sections that buzz in a machine room or a workshop.
Photoelectric Anti-Jam Detection - The cycle stops on a misfeed before laminations are crushed or tooling is damaged.
Dual-Material Capability - Handles CRGO and CRNGO grades with 0.3 mm, 0.35 mm and 0.5 mm sheet thickness on the same platform.
Key Specifications
| Parameter | Details |
|---|
| Model | EI-86 |
| Stacking Accuracy | ±0.1 mm |
| Positioning Accuracy | ±0.02 mm |
| Stacking Speed | Up to 250 stacks per minute |
| Applicable Core Range | 280-600 VA EI cores |
| Bobbin Window Width | Approx. 28 mm |
| Power Supply | AC 200~250V, 50/60 Hz (customizable) |
| Power Consumption | 30~60 W |
| Operating Environment | 0°C to 45°C |
| Service Air Pressure | 0.4-0.65 MPa (dry & clean air) |
| Silicon Steel Thickness | Compatible with 0.3 mm, 0.35 mm, 0.5 mm |
| Applicable Bobbin Type | Cardboard or plastic bobbin |
| Control System | PLC with touch screen interface |
| Short Circuit Protection | AC220V overload protection + DC24V output short-circuit protection |
| Grounding | Dual grounding: 220V + 24V |
| Machine Weight | 70 kg |
| Warranty | 12 months |
Typical Core Programs
With a bobbin window of about 28 mm, the EI-86 serves the 280-600 VA band: welding machine and inverter welding control transformers, elevator and escalator control transformers, machine tool control power supplies, and general industrial isolation transformers. Cardboard and plastic bobbins are both supported. The unit runs as a standalone station or inline with winding and varnishing, and its touch screen stores a separate recipe for each core size so a mixed catalogue does not turn into a changeover bottleneck.
Why Buyers Verify Us Before They Buy
Made and shipped by the manufacturer, not a trading layer. We build the machines ourselves, which is why a special voltage, a different bobbin format or a recipe set for your own core catalogue is a configuration question rather than a refusal.
CE certified equipment - documentation provided with the shipment.
Customers in serial production - our equipment serves customers including GE Vernova and Eaton (USA), as well as CATL and Chint Electric.
Export track record - machines delivered to more than 20 countries and regions.
One supplier for the whole range - the full EI series from EI-19 to EI-300 is available, so your core catalogue does not need a second vendor.
12-month warranty plus after-sales technical support from the team that built the machine.
Ordering and Delivery
01Send your core requirement: EI size or VA rating, lamination thickness and material grade, bobbin type, and target output per shift.
02We confirm the configuration, the bobbin-window fit and the stacking program for your cores.
03Order is confirmed on T/T terms - minimum order quantity 1 unit, indicative list price USD 3,000 per unit.
04Delivery is 1-15 working days for standard configurations, followed by after-sales technical support for the full 12-month warranty period.
Questions Buyers Ask Before Ordering
Which cores can the EI-86 stack?EI cores in the 280-600 VA band, in CRGO or CRNGO, with 0.3 mm, 0.35 mm or 0.5 mm lamination thickness. The bobbin window is approximately 28 mm.
Will it run my cardboard bobbins as well as plastic ones?Yes. Both cardboard and plastic bobbins are supported on the same machine.
How fast is it in real production?Up to 250 stacks per minute, with cycle time settable between 1 and 60 seconds so the speed can be matched to the core and the operator's handling rhythm.
What happens if a lamination misfeeds?Photoelectric anti-jam detection stops the cycle before the stack or the tooling is damaged, instead of letting the machine keep pressing.
How do I change from one core size to another?Each core size is stored as its own recipe on the PLC touch screen, so changeover is a program recall rather than a mechanical reset.
What power supply does it need?AC 200~250V, 50/60 Hz as standard, with 30~60 W consumption; other voltages are customizable, and the machine uses dual grounding (220V + 24V) with AC220V overload protection and DC24V short-circuit protection.
Get your stacking configuration confirmed
Send us four details and we will come back with the matching configuration, bobbin-window check and delivery date: (1) EI size or VA rating, (2) lamination thickness and material grade, (3) bobbin type, (4) target stacks per shift. If you are comparing machines, tell us what your current stacking method costs you in rejects and rework - that is usually where the payback calculation starts.
Use the inquiry form on this page or reply directly to our sales team. Minimum order quantity: 1 unit. Payment: T/T. Warranty: 12 months. Delivery: 1-15 working days for standard configurations.
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