Automatic EI-150 Lamination Stacking Machine for Large Power and Distribution Transformer Core Assembly, ±0.1 mm Accuracy, 250 Stacks/Min, PLC Control, CE

Automatic EI-150 Lamination Stacking Machine for Transformer Core Assembly

The EI-150 automatic lamination stacking machine inserts E & I silicon steel laminations into transformer coil bobbins under PLC control. Built for 2000-5000 VA cores, it holds ±0.1 mm stacking accuracy at speeds up to 250 stacks per minute, producing the large, tightly compressed cores that power and distribution transformers depend on for their declared efficiency.

Why Stacking Quality Decides Your Efficiency Class

In a large transformer, no-load loss runs every hour of the unit's service life - often 15 to 20 years. That makes the core the most consequential part of the design: a stack with uneven compression or misaligned laminations raises no-load loss, and the finished unit can miss the efficiency class it was designed to meet. Because the penalty is paid continuously rather than once, small stacking defects compound into a large lifetime energy cost, and into a compliance risk when the transformer is tested against its declared values. The EI-150 controls what manual stacking cannot: identical placement of every lamination, identical compression force on every stack, and a counted, verifiable lamination quantity.

Key Specifications

Precision That Shows Up on the Test Report

✅ Stable Effective Air Gap – ±0.1 mm stacking accuracy holds the air gap steady, so no-load current and core loss stay inside the designed range.

✅ ±0.02 mm Positioning – Tight E & I alignment limits burrs and edge misalignment that locally saturate the core and raise loss.

✅ Uniform Stack Compression – Consistent stacking force avoids the loose stacks that are a common hidden cause of high no-load loss.

✅ Controlled Lamination Count – The PLC counts every sheet, so each core carries exactly the lamination quantity its design specifies.

✅ Smooth Lamination Handling – Preserves the insulation coating on 0.3 mm, 0.35 mm and 0.5 mm silicon steel, limiting eddy-current loss.

✅ Large-Core Capability – Handles 2000-5000 VA cores with the same repeatability it delivers on small formats.

✅ Automatic Jam Detection – The PLC stops the cycle on a misfeed before material or tooling is damaged.

✅ Durable and Safe – High-strength steel frame, dual grounding, overload and short-circuit protection, emergency stop and safety guards.

Applications

Sized for 2000-5000 VA cores, the EI-150 suits manufacturers of power and distribution transformers, industrial control and isolation transformers, inverter and UPS transformers, welding and rectifier transformers, and heavy-duty power supplies. Both cardboard and plastic bobbins are supported, and the machine works as a standalone station or inside a larger winding and assembly line.

Why Choose Us?

We are a direct manufacturer offering competitive factory pricing and CE certified quality assurance. Our equipment has served globally renowned customers including GE Vernova and Eaton (USA) as well as leading enterprises such as CATL and Chint Electric, and is exported to more than 20 countries and regions. Delivery within 1-15 working days, professional after-sales technical support, and a 12-month warranty. The full EI series from EI-19 to EI-300 is available to match your production requirements.