Westfall Technik Press Release

Milton, Ontario – MHS is proud to introduce the next evolution in micro injection molding: the
new M3, a fully automated manufacturing cell designed for the high-volume production of
direct-gated precision micro parts – completely waste-free and with unmatched consistency.
The new M3-D08 will be running at K 2025 in Düsseldorf, Germany from October 8-15 (Hall 1,
Booth C40).

The M3 is engineered for mass production of complex micro molded parts weighing under 200
milligrams, including components as small as 10 milligrams or less. It achieves this with no cold
runner, eliminating material waste and reducing cycle time. This results in millions of identical
parts at the highest level of quality, all produced through a compact, efficient process.

Despite its high degree of standardization, the M3 is designed to be flexible. Modular base
tooling allows for interchangeable inserts, side actions, core pulls, and ejectors – enabling the
production of highly complex part geometries. Its integrated 8-drop valve gate hot runner
system is permanently mounted to the machine and stays in place during mold changes.

The M3 processes any thermoplastic material, including high-temperature engineering polymers
such as PEEK, LCP, and PEI. Its ability to mold sensitive materials at scale is made possible by its
patented ISOKOR process – a unique three-stage molding method that represents a
fundamental shift in how micro parts are produced.

Unlike conventional two-stage systems that rely on plunger-based injection and cold runners,
the M3 pre-compresses the melt in the screw, further compresses it in the hot runner, and
stores it as viscoelastic energy. Upon opening the valve gate, the melt expands and fills the mold
cavity in milliseconds at extremely high velocity. This rapid, homogeneous cavity filling results in
denser, more isotropic parts with lower shrinkage and internal stress.

The entire process is controlled and monitored with high-resolution sensors, capturing key
parameters like pressure, temperature, position, and time – ensuring full traceability and
repeatability.

The melt pathway is designed for maximum control: granules are conditioned in an integrated
dryer, gently melted in the screw at a controlled low temperature, and only heated to final
processing temperature within the hot runner – preserving material integrity and minimizing
degradation. The system’s cascade pressure profile and constant pressure in the Melt Delivery
Unit (MDU) ensure uniform molecular compaction and improved part morphology.

Additional innovations include a dry cycle time of under three seconds, a clamp-free horizontal
mold interface with electromagnetic force, and an electric linear motor that provides smooth,
sensor-monitored mold movement for sensitive tooling.

The M3 supports up to 32 cavities and even allows the molding of two different parts or two-
component parts in the same cycle. Insert overmolding, part separation per cavity, and inline
quality inspection are all supported within the standard cell design. A built-in robot handles part
removal via vacuum, placing each part individually for inspection or post-processing.

Designed for cleanroom use, the M3 can be equipped with HEPA filtration and optical inspection
systems to protect sensitive tools and ensure flawless output.

MHS has created not just a machine, but a new standard in micro molding. The M3 is faster,
smarter, and more precise than anything before it.

Learn more about the M3 at:
www.mhs-hot-runners.com