Micro Injection Molding

Micro Injection Molding Services in Canada

Micro injection molding produces parts with shot weights below ~1 gram, micron-scale features, and tolerances that approach the limits of measurement. Specialized micro-molding presses with screw diameters as small as 8 mm, precision shot control, and high-resolution tooling deliver parts for medical microfluidics, electronics connectors, hearing aids, drug delivery, and miniaturized consumer products. Canadian micro-molding capacity is small but well-developed at specialized medical and electronics suppliers.

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Micro Injection Molding in Canada

Micro injection molding is precision molding at the limits of plastics manufacturing. Specialized micro-presses produce parts at scales where conventional injection molding loses accuracy and at tolerances where the dimensional control of the press, the resolution of the tooling, and the consistency of the material all matter.

Where Micro Molding Wins

Medical microfluidics. Lab-on-a-chip devices, point-of-care diagnostic cartridges, and continuous monitoring sensors with micron-scale fluid channels.

Drug delivery. Insulin pump components, inhaler internals, auto-injector mechanisms with tight-tolerance moving parts.

Hearing aids. Modern hearing aids contain dozens of micro-molded components — housings, sound-port pieces, battery contact frames, vent valves.

Electronics connectors. High-density connectors, fiber-optic alignment components, MEMS device packaging.

Optical components. Precision lenses, light pipes, and waveguides where surface finish and dimensional accuracy are critical.

What Micro-Molding Demands

Specialized tooling. Tools machined or EDM’d to micron-class accuracy, often with single-cavity or family-cavity layouts.

Precision presses. Shot control accurate to ~0.001 cm³, screw diameters from 8–14 mm, fast and precise injection profiles.

Material control. High-temperature engineering polymers (PEEK, ULTEM, LCP) require precise temperature management; flow-length-to-thickness ratios are extreme.

Inspection capability. Optical CMM, contactless measurement, and stereomicroscope inspection are standard at micro-molding shops.

Canadian Micro Molding Capacity

Canadian micro-molding is concentrated in medical-device and electronics manufacturing clusters — Greater Toronto, Montreal, Ottawa-Gatineau, and Vancouver. Capacity is specialized and limited; we route based on material, certification scope, and tolerance class. For non-micro precision injection molding, route to standard injection molding suppliers.

Specifications

Micro Injection Molding at a Glance

Certifications
  • ISO 9001:2015
  • ISO 13485 (Medical)
  • USP Class VI (Biocompatibility)
  • FDA Registered
Tolerances
Standard
+/- 0.025 mm
Precision
+/- 0.005 mm (5 microns)
Lead Times
Prototype
6–12 weeks (with tooling)
Production
3–6 weeks (after tooling)
Network
Closed Beta

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Available Materials

PEEK (Medical/Industrial) Liquid Crystal Polymer (LCP) PEI (ULTEM) Polycarbonate (Optical) Cyclic Olefin Copolymer (COC, Microfluidic) PMMA (Optical) PA12 (Medical) PEBA (Medical)

Industries We Serve

Medical Devices
Drug Delivery
Hearing Aids
Electronics & Connectors
Microfluidics
Optical / Sensors

Frequently Asked Questions

When does a part need micro molding instead of conventional molding?
When shot weight drops below ~1 gram or features approach 50 microns or smaller, conventional molding presses lose precision. Micro-molding presses are designed for these regimes — with screw diameters around 8–14 mm, precision shot control, and tooling that holds tighter tolerances. For shot weights above ~1 gram and features above ~100 microns, conventional molding is more economical.
What's the smallest part that can be micro-molded?
Micro-molded parts can weigh as little as 1 milligram (0.001 g) and have features as small as 5–10 microns. Microfluidic chip channels, hearing aid components, and drug delivery devices regularly hit these scales. Cycle times are typically 3–8 seconds, comparable to conventional molding.
Are micro-molded parts compatible with insert molding?
Yes — micro insert molding is common for medical and electronics applications. Tiny stamped lead frames, fine wires, or magnetic inserts are loaded into the cavity (typically robotically, given the size) and overmolded with the precision plastic. Hearing aids and miniaturized medical sensors use this routinely.
What materials are used in micro molding?
High-flow, high-stiffness materials dominate — PEEK and ULTEM for industrial and medical, LCP for electronics connectors, COC for microfluidic and optical applications, polycarbonate for transparent components. Material selection depends heavily on the flow path, with very small parts requiring materials that fill thin sections completely without short shots.

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