Automatic EI-19 Lamination Stacking Machine for Miniature Transformer and Choke Core Assembly, ±0.1 mm Accuracy, 250 Stacks/Min, PLC Control, CE

Automatic EI-19 Lamination Stacking Machine for Miniature Transformer Core Assembly

The EI-19 automatic lamination stacking machine inserts E & I silicon steel laminations into transformer coil bobbins under PLC control. Built for 0.5-3 VA miniature cores, it holds ±0.1 mm stacking accuracy at speeds up to 250 stacks per minute, delivering the precise, repeatable cores that small transformers and chokes need for stable electrical performance.

Why Miniature Cores Still Need Precision Stacking

Small transformers operate in tight spaces with limited thermal margin. A core with uneven lamination alignment or inconsistent compression runs warmer than designed, shortening insulation life and degrading performance over time. Because the EI-19 is the smallest standard EI format, there is no room to compensate for stacking error elsewhere in the design. The EI-19 stacking machine controls every lamination placement and compression cycle, so each core meets the same specification whether it is the first unit of the day or the ten-thousandth.

Key Specifications

Precision That Protects Small Designs

’ Stable Effective Air Gap – ±0.1 mm stacking accuracy holds the air gap steady, so magnetizing current and inductance stay within the narrow tolerances small transformers require.

’ ±0.02 mm Positioning – Tight E & I alignment limits burrs and edge misalignment that locally saturate the core and raise loss in a design with no thermal headroom to spare.

’ Uniform Stack Compression – Consistent stacking force avoids loose sections that vibrate and audibly hum in compact enclosures.

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

’ Gentle Lamination Handling – Preserves the insulation coating on thin 0.3 mm and 0.35 mm silicon steel, limiting eddy-current loss in small cores where every milliwatt counts.

’ Miniature-Core Capability – Handles 0.5-3 VA EI-19 cores with the same repeatability it delivers on larger 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 0.5-3 VA cores, the EI-19 suits manufacturers of miniature power transformers, line-filter chokes, small adapter and charger transformers, signal and audio coupling transformers, relay and solenoid driver transformers, and compact LED driver 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 globaly 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.