Resources
Additional references and resources for micro molding design.
Industry Standards
Plastics Industry Standards
- SPI/Plastics Industry Association — Standards and Practices of Plastics Molders
- AQ-102 — Molding tolerances for plastic materials
Medical Device Regulations
- FDA 21 CFR Part 820 — Quality System Regulation
- ISO 13485 — Medical devices quality management systems
- ISO 10993 — Biological evaluation of medical devices
- ISO 14644-1 — Cleanroom classification standards
- ISO 14698 — Cleanroom microbial monitoring
- USP Class VI — Biocompatibility testing for plastics
General Manufacturing
- ISO 9001 — Quality management systems
- IATF 16949 — Automotive quality management
- ISO 14971 — Medical device risk management
Material Resources
Material Databases
- Material supplier technical data sheets
- UL Prospector (material property database)
- CAMPUS (plastics material database)
Common Material Suppliers
| Material | Major Suppliers |
|---|---|
| PEEK | Victrex, Solvay, Evonik |
| LCP | Celanese (Vectra), Polyplastics |
| PEI (Ultem) | SABIC |
| PPS | Celanese (Fortron), Solvay (Ryton) |
| COC/COP | TOPAS, Zeon |
| Engineering plastics | BASF, DuPont, Covestro, SABIC |
| Medical Silicone | DuPont Liveo, Momentive |
Micro Molding Equipment
Machine Manufacturers
| Manufacturer | Notable Systems |
|---|---|
| Arburg | 8mm micro injection unit |
| Wittmann Battenfeld | MicroPower series |
| Sumitomo Demag | SE7M series |
| Boy | XS series |
| Sodick | Micro molding systems |
| Nissei | Micro injection machines |
Design Software
Flow Simulation
- Moldflow (Autodesk)
- Moldex3D (CoreTech)
- Sigmasoft (Sigma Engineering)
CAD Systems
Ensure your CAD system can handle:
- Micro-scale features accurately
- Appropriate file tolerances for micro dimensions
- Export formats compatible with mold maker’s systems
Measurement Equipment Suppliers
| Technology | Suppliers |
|---|---|
| CMM / Micro-CMM | Zeiss, Hexagon, Mitutoyo |
| Vision systems | Keyence, OGP, Nikon |
| White light interferometry | Zygo, Bruker |
| CT scanning | Zeiss, GE, Nikon |
| Profilometry | Mitutoyo, Taylor Hobson |
| Confocal microscopy | Olympus, Leica |
Glossary
| Term | Definition |
|---|---|
| Aspect ratio | Ratio of feature height to width |
| Cavity | The female portion of mold forming external part surfaces |
| Conformal cooling | Cooling channels that follow part contours |
| Core | The male portion of mold forming internal part surfaces |
| Cpk | Process capability index accounting for centering |
| DfMM | Design for Micro Molding |
| DLC | Diamond-Like Carbon (mold coating) |
| DOE | Design of Experiments |
| Draft angle | Taper on vertical walls to aid ejection |
| EDM | Electrical Discharge Machining (mold making process) |
| Flash | Excess material at parting line |
| Gage R&R | Measurement system repeatability and reproducibility |
| Gate | Opening where material enters the cavity |
| GD&T | Geometric Dimensioning and Tolerancing |
| Hesitation effect | Flow delay at micro feature entrances |
| IQ/OQ/PQ | Installation/Operational/Performance Qualification |
| LCP | Liquid Crystal Polymer |
| Meld line | Where flow fronts meet at an angle |
| Parting line | Where mold halves meet |
| PEEK | Polyether Ether Ketone |
| PEI | Polyetherimide |
| Runner | Channel delivering material from sprue to gate |
| Shear thinning | Viscosity reduction under high shear rates |
| Short shot | Incomplete filling of cavity |
| Sink mark | Surface depression from shrinkage |
| SPC | Statistical Process Control |
| Sprue | Channel from nozzle to runner system |
| Undercut | Feature preventing straight-pull ejection |
| Variotherm | Rapid mold temperature cycling |
| Weld line | Where flow fronts meet head-on |
Contact
For questions about this design guide or micro molding capabilities, contact Future Micro.
References
This design guide was compiled from authoritative industry and academic sources:
Academic & Research Publications
- A Review of Microinjection Moulding of Polymeric Micro Devices — PMC/MDPI
- The Micro Injection Moulding Process for Polymeric Components Manufacturing — IntechOpen
- Micro-injection moulding of polymer microfluidic devices — Microfluidics and Nanofluidics, Springer
- Effects of Cavity Thickness and Mold Surface Roughness on Polymer Flow During Micro Injection Molding — PMC
- Advanced Injection Molding Methods: Review — Materials, MDPI
- Modelling and Simulation for Micro Injection Molding Process — IntechOpen
- Recent Advances in Microinjection Molding of Polymer Materials for Biomedical Applications — Advanced Engineering Materials, Wiley
- A Review on Microcellular Injection Moulding — PMC/MDPI
- Microcellular injection molding of polymers: a review — Current Opinion in Solid State and Materials Science
- Micro-nanostructured polymer surfaces using injection molding: A review — ScienceDirect
- Microinjection molding of thermoplastic polymers: A review — Journal of Micromechanics and Microengineering
- Study of rheological behaviour of polymer melt in micro injection moulding — Polymer Testing
- Optimizing process parameters in micro injection moulding — ScienceDirect
- Multi-Objective Optimizations for Microinjection Molding Process Parameters of Biodegradable Polymer Stent — Materials, MDPI
- Study on the Effect of Processing Parameters on Residual Stresses of Injection Molded Micro-Pillar Array — PMC
- Fundamentals of rapid injection molding for microfluidic cell-based assays — Lab on a Chip, RSC
- Fabrication Methods for Microfluidic Devices: An Overview — Micromachines, MDPI
- Mechanical properties of the weld line defect in micro injection molding for nano filled polypropylene composites — Journal of Alloys and Compounds
- Replica Molding of High-Aspect-Ratio Polymeric Nanopillar Arrays — Langmuir, ACS
- High-aspect-ratio nanoimprint process chains — Microsystems & Nanoengineering
- Replication integrity of micro features using variotherm and vacuum assisted microinjection moulding — ScienceDirect
- Injection molding of high-precision optical lenses: A review — ScienceDirect
- New Considerations on the Determination of the Apparent Shear Viscosity of Polymer Melt with Micro Capillary Dies — Polymers, MDPI
- Rheological behavior of POM polymer melt flowing through micro-channels — European Polymer Journal
- Polymer Crystallization Under High Cooling Rate and Pressure — Springer
- Effects of Pressure and Cooling Rates on Crystallization Behavior of Isotactic Polypropylene — Polymers, MDPI
- Analysis of the Similarity between Injection Molding Simulation and Experiment — PMC
- Development of the vent clogging monitoring methods for injection molding — ScienceDirect
Industry Technical Resources
- Accumold — Micro Molding Design Guidelines
- Accumold — Design for Micro Molding
- Accumold — Micro Molder Requirements
- Accumold — Medical Micro Molding
- Accumold — Micro Optics Molding
- MTD Micro Molding — Micro Materials
- MTD Micro Molding — Micro Metrology
- MTD Micro Molding — How Thin Can We Go?
- Isometric Micro Molding — Thin-Walled Micro Injection Molding
- Isometric Micro Molding — CT Scanning
- Medical Micro Molding — Process Validation Protocols
- Medical Micro Molding — ISO 13485 Requirements
- Medical Micro Molding — PEEK for Medical Uses
- Medical Micro Molding — Materials: PEEK, LCP & Biodegradable Polymers
- Protolabs — Injection Molding Tolerances
- Protolabs — Draft Angle Guidelines
- Protolabs — Wall Thickness Guidelines
- Manufacturing Tomorrow — Tolerance Attainment in Micro Molding
- Manufacturing Tomorrow — Design Guidelines for Micro Molding
- Med-Tech Insights — Design Guidelines for Micromoulding
- Plastics Today — More to Micro Molding than Part Size
- Plastics Technology — Micromolding Sizing Up the Challenges
- Plastics Technology — Molding Simulation: New Frontiers
- Plastics Technology — Faster Is Not Always Better
- Plastics Technology — Vacuum Venting Keeps Molds Running Longer
- MoldMaking Technology — Diamond-Like Carbon Mold Coatings
- MoldMaking Technology — A Different Approach to Mold Venting
- Machine Design — CT vs CMM Comparison
- Makino — Micromachining Technologies
- EDM Intelligent Solutions — Micro Manufacturing
- Arburg — Micro Injection Moulding
- Sumitomo Demag — SE7M Micro Injection Molding Machines
- Moldex3D — Flow Simulation
- Xometry — Conformal Cooling
- 3D Systems — Conformal Cooling
- Ensinger — Micro Injection Moulding with High Performance Polymers