Automatic EI-75 Lamination Stacking Machine for Distribution Transformer Core Assembly, ±0.1 mm Accuracy, 250 Stacks/Min, PLC Control, CE

Automatic EI-75 Lamination Stacking Machine for Distribution and Isolation Transformer Core Assembly

The EI-75 automatic lamination stacking machine inserts E & I silicon steel laminations into transformer coil bobbins under PLC control. Sized for 120-350 VA cores used in distribution and isolation transformers, it holds ±0.1 mm stacking accuracy at up to 250 stacks per minute. Every core leaves the line with a repeatable effective air gap, uniform compression and the correct lamination count - the three variables your final electrical test is actually measuring.

The Real Cost of a Machine That Stops

In a transformer plant, the stacking station is a bottleneck by design: it sits downstream of winding and upstream of varnishing, so when it stops, both sides stop. A machine that is fast on paper but slow to recover is not fast at all. The EI-75 is engineered around the opposite question - not only how quickly it stacks, but how quickly it returns to full output after a jam, a die change or a shift handover. That is why the design concentrates on access, diagnostics and a predictable maintenance calendar rather than on peak speed alone.

Built to Be Serviced, Not Replaced

✅ Wear Parts You Can Change Yourself - Feed rollers, guide plates, photoelectric sensors and the stacking pusher are simple mechanical items with published part numbers, so maintenance staff can replace them with basic hand tools instead of waiting for a service visit.

✅ Fault Codes Instead of Guessing - The PLC records a fault code and the last cycle state on every stop. Operators report the code, not a vague symptom, which shortens remote diagnosis from hours to minutes.

✅ Recipes Stored in the Controller - Each EI size has a saved recipe of stack count, insertion depth and cycle timing. Recovering after a power interruption or a weekend shutdown is a recipe recall, not a re-setup.

✅ Clear Access Panels - Tool-free covers expose the feed path and stacking head, so a misfeed is cleared in place rather than by dismantling guarding.

✅ Commercial Spare Kits - Recommended first-year spares ship as one kit with the machine, so a critical sensor never becomes a two-week customs delay.

✅ Remote Technical Support - Commissioning, recipe tuning and troubleshooting are handled by phone and video with our engineers, which is usually faster than a site visit across borders.

Key Specifications

Where the EI-75 Fits on Your Line

With a window width of about 25 mm, the EI-75 covers the 120-350 VA band: distribution transformers for building services, isolation transformers for medical and laboratory equipment, control power transformers, and general purpose step-up or step-down units. It handles 0.3 mm, 0.35 mm and 0.5 mm silicon steel in both CRGO and CRNGO grades, with cardboard or plastic bobbins, and runs as a standalone station or as part of a winding-to-varnish line. Because the recipe system stores each size separately, one unit can serve several products in a mixed catalogue without sacrificing setup discipline.

Commissioning and Support

Delivery is 1-15 working days for standard configurations. Each machine ships with an operating manual, a recommended spare parts list, and the recipe set for the core sizes you specify at order. Our engineers support installation and first production by video, and respond to technical questions within one working day. We are a direct manufacturer with CE certified equipment, serving customers including GE Vernova and Eaton (USA) as well as CATL and Chint Electric, and exporting to more than 20 countries and regions. The full EI series from EI-19 to EI-300 is available so one supplier can cover your complete core range.