Micro Injection Molding
JUCHENG is a leader in micro injection molding services, engineering the invisible with absolute precision. We specialize in producing sub-gram plastic parts and components with micron-level feature molding, supported by our sub-micron 5-axis tooling and ISO 13485 clinical environments.
Beyond Standard Manufacturing
Micro injection molding is not simply standard molding scaled down. It is a highly specialized process used to manufacture parts that weigh fractions of a gram (often less than 0.1g), or larger parts that feature microscopic, high-precision details such as micro-fluidic channels or optical arrays.
At the micro-scale, standard rules of plastic flow and cooling do not apply. A single speck of dust acts as a boulder, and a microscopic variation in mold steel creates catastrophic flash.
Jucheng Precision solves this through a combination of extreme-precision in-house tooling, specialized micro-injection units, and Zeiss CMM metrology that verifies features the human eye cannot see.
Redefining Precision Limits
The success of micro injection molding services depends on sub-millimeter plastic molding accuracy. We utilize specialized micro-injection units and micro gear injection molding techniques to eliminate material degradation and ensure high precision micro plastic parts for medical and electronic sectors.
< 0.01g
Minimum Part Weight
±0.005mm
Tooling Tolerance
0.1mm
Minimum Wall Thickness
Class 8
ISO Cleanroom
The Science of Micro Molding
Scaling down presents unique physical and thermodynamic challenges. Here is how Jucheng’s expertise guarantees zero-defect micro parts.
The Challenge
Material Degradation
Standard injection barrels are too large. The tiny amount of plastic needed sits in the heated barrel too long, burning and degrading the polymer.
Micro-Flash Prevention
When molding parts under 1mm, a parting line gap of even a few microns will cause flash (burrs) that are larger than the part's features itself.
Part Ejection & Handling
Micro parts are easily damaged by standard ejector pins and carry static electricity, making them difficult to handle and package.
Jucheng's Engineering Solution
Specialized Micro-Injection Units:
We utilize specialized injection molding machines equipped with extremely small plunger/screw systems. This ensures the "residence time" of the plastic is minimized, preserving the chemical integrity of sensitive materials like PEEK, LCP, and medical-grade PC.
Sub-Micron Tooling Mastery:
We do not outsource micro-molds. Our in-house tool room uses advanced
Sinker EDM, Wire EDM, and 5-axis CNCs
to machine hardened steel cavities with absolute zero-clearance shut-offs, ensuring flash-free microscopic parts.
Robotic & Vacuum Extraction:
We design custom, non-destructive ejection systems (such as stripper plates or vacuum extraction). Parts are immediately retrieved by high-precision robotic arms and packaged within our static-controlled ISO 13485 cleanroom environment.
The Metrology Advantage: Zeiss CMM
You cannot manufacture what you cannot measure. Jucheng operates a state-of-the-art metrology lab featuring advanced optical comparators and Zeiss Coordinate Measuring Machines (CMM). We verify micro-features, wall thicknesses, and hole diameters at the micron level, providing complete dimensional inspection reports for your quality compliance (PPAP, FDA submissions).
We verify what the human eye cannot see. Check your micro-tolerances.
Review My Micro Specs →Powering Global Miniaturization
Our micro molding capabilities are certified to IATF 16949 and ISO 13485 standards, trusted by the world's leading technology brands.
Medical & Biotech
Molding microscopic fluidic channels, implantable PEEK components, and surgical tool tips in our ISO Class 8 Cleanroom, ensuring absolute sterility and biocompatibility.
Consumer Electronics
Producing ultra-fine pitch electrical connectors, micro-switches, and camera lens housings using high-flow LCP and PC to support thinner, lighter devices.
Automotive Sensors
IATF 16949 certified manufacturing of micro-gears, sensor housings, and actuator components from high-temperature polymers like PPS and Ultem for under-hood reliability.
Ready to Scale Down?
Do not let manufacturing limitations hold back your product's miniaturization. Upload your 3D CAD files today for a free DfM analysis. Our tooling engineers will provide a comprehensive micro-molding quote within 24 hours.
UPLOAD CAD FOR FREE DFM & QUOTE