Leonhardt’s 3 mm Collapsing Core Debuts at Fakuma 2026

Fakuma 2026 Leonhardt pushes collapsing core technology into the microscale

2026-08-22 Source: Leonhardt 1 min Reading Time

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At Fakuma 2026, Leonhardt will present a collapsing core with a diameter of just 3 mm. The new development expands the limits of miniaturisation in injection moulding, enabling the economical production of highly precise plastic components with complex internal undercuts.

The technology enables highly miniaturised plastic parts with integrated undercuts to be produced directly by injection moulding.(Source: Leonhardt) — The technology enables highly miniaturised plastic parts with integrated undercuts to be produced directly by injection moulding.
(Source: Leonhardt)

While conventional collapsing cores are typically available in diameters ranging from 8 to 240 mm, Leonhardt’s 3 mm solution enables the demoulding of internal undercuts of approximately 7 percent of the core diameter. This opens new possibilities for manufacturing miniature components with geometries that were previously difficult or impossible to produce in a single moulding process.

The technology enables highly miniaturised plastic parts with integrated undercuts to be produced directly by injection moulding. Secondary assembly and post-processing operations can be significantly reduced or eliminated, improving part quality, process reliability and manufacturing efficiency while lowering production costs.

The innovation is particularly relevant for applications in medical technology, microfluidics, precision engineering, and microsystems technology. By integrating complex internal features directly into moulded parts, manufacturers gain greater design freedom and can develop smaller, lighter, and more functional products.

The new technology also supports more sustainable manufacturing. Smaller components require less raw material, shorter cycle times, and lower energy consumption. Eliminating additional manufacturing and assembly steps further reduces waste and improves resource efficiency throughout the production process.

Although the 3 mm collapsing core is currently at the prototype stage, initial results demonstrate its strong potential to expand the capabilities of precision injection moluding and open new application areas for highly miniaturized plastic components.

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Date: 08.12.2025

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