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Micro Molding Companies

Last updated: January 2026

This directory lists 67 micro molding companies across the United States, from dedicated micro-specialists focused on medical devices to diversified precision molders serving multiple high-tech industries.

Buyers typically seek micro molding partners to solve critical challenges like achieving extreme miniaturization for implantable devices, developing complex microfluidic components with precise internal channels, or producing highly functional optical elements with exceptional surface finishes. The ability to manage tiny shot weights, often measured in milligrams, while maintaining high cavitation and ensuring perfect feature replication, is paramount for these applications.

Suppliers in this space differentiate themselves based on their core competencies: some are pure-play micro molders excelling in sub-millimeter features and exotic materials, often for medical or aerospace. Others are precision molders with micro molding capabilities as part of a broader offering, suitable for slightly less demanding applications or when secondary operations are required. Then there are integrated solution providers who offer everything from tooling design and prototyping to high-volume production and assembly.

Before engaging, buyers should have a clear understanding of their critical-to-function (CTF) dimensions, material specifications (especially for bioresorbable or high-performance polymers), and anticipated annual volumes. Suppliers, in turn, expect detailed CAD models, tolerance stacks, and often a preliminary DFM review from the buyer side, as well as clarity on regulatory compliance needs like ISO 13485 for medical parts.

67 companies·47 emails·58 phones

Company Directory

67 companies nationwide

Carol Stream, IL

Based in Carol Stream, IL, Aberdeen Technologies specializes in injection molding, including insert and overmolding, for micro parts. Since 1994, they have provided solutions for medical devices, aerospace/defense, and consumer products. They offer prototyping, mold design, and production runs for components requiring strict and tight tolerances.

San Marcos, CA

Based in San Marcos, CA, ACI Medical, LLC provides contract manufacturing and custom molding services. They leverage a modern CAD/CAM tool room and advanced injection molding equipment for precision part production and assembly, specializing in components and devices for the medical industry.

Woodstock, IL

AdvanTech Plastics, based in Woodstock, IL, is a full-service plastic injection molding company. They specialize in custom, large-scale, and micro injection molding, serving medical, industrial, and packaging sectors. Their capabilities include medical device molding, two-shot molding, engineering, assembly, and finishing services.

Houston, TX

American Medical Molding LLC, an ISO 13485 certified company, specializes in precision injection molding for medical devices. Operating from a Class 8 cleanroom in Houston, TX, they focus on producing very small parts, wearables, and surgical components. Services include complex overmolding, prototyping, and mold filling analysis.

Sparta, WI

Based in Sparta, WI, AMS Micromedical, LLC provides custom, ultra-precise micromedical solutions. They specialize in plastic injection molding, precision micro-machining, engineering, and finishing of micro-devices and components. Their ISO-certified and FDA-approved 29,000 sq ft facility manufactures advanced medical parts.

Minneapolis, MN

Based in Minneapolis, MN, Aprios Custom Manufacturing specializes in precision scientific injection molding services. They directly provide micro-molding, overmolding, and insert molding on presses from 15 to 610 tons. Serving medical and industrial applications, their capabilities also encompass prototype tooling, additive manufacturing, and ISO-certified quality management.

Lafayette, LA

ASH INDUSTRIES, based in Lafayette, LA, specializes in precision plastic, metal, and silicone injection molding. They offer engineered solutions with in-house tooling and operate an ISO Class 7 medical cleanroom for demanding applications. Services include DFM, prototyping, and secondary operations, ensuring high-quality, confidential manufacturing for complex components.

Houston, TX

Based in Houston, TX, Blackwell Plastics provides comprehensive plastic injection molding and manufacturing solutions. The company specializes in producing highly complex and precise parts, including small, intricate components, with tight tolerances for various industrial applications.

Elgin, IL

Based in Elgin, IL, Chemtech Plastics specializes in high-precision injection molding, toolmaking, and engineering services. They provide advanced manufacturing solutions with a focus on quality assurance and automation. The company serves diverse industries including automotive, medical, electronics, optical, and lighting applications.

Control Plastics provides custom plastic injection molding, including MIM and CIM, for prototypes and production from its facilities. Specializing in components for the medical, military, goods, and electronics industries, the company offers DFM analysis, engineering coordination, and assembly services, holding ISO 9001 and 13485 certifications.

Georgetown, TX

Based in Georgetown, TX, Detail Mold & Manufacturing provides comprehensive molding services with over 30 years of experience. Their capabilities span from tool design and mold validation through full production runs, ensuring quality in every mold.

Buffalo, NY

Isometric Micro Molding Solutions, a Nissha Medical Technologies division, specializes in high-precision micro mold manufacturing and component design. They offer end-to-end solutions for micro-sized parts, primarily for single-use medical technologies. Services encompass comprehensive design, development, and manufacturing, enhanced by accelerator programs for efficient product advancement.

Ramsey, MN

Based in Ramsey, MN, Dynamic Group specializes in precision medical molds and molding. The company manufactures medical devices with innovative designs, focusing on accelerated deliveries to meet client needs. They provide comprehensive molding and tooling services for the medical industry.

San Diego, CA

Based in San Diego, CA, HiComp is a microfluidic foundry specializing in the design, prototyping, and scalable manufacturing of diagnostic and life science consumables. They offer ISO 7 cleanroom injection molding, glass molding for microfluidics and optics, PDMS fabrication, and MEMS microfabrication for high-volume production.

Riverside, CA

Based in Riverside, CA, Hi-Rel Plastics & Molding, Inc. provides custom plastic injection and blow molding, known for very high precision. With over 40 years of experience, they offer part evaluation, 3D printing, and prototyping. Certified to ISO 9001, AS 9100, and ISO 13485, they operate an ISO 7 Clean Room for diverse industries.

New Richmond, WI

Based in New Richmond, WI, Isometric Micro Molding provides innovative micro molding and micro automation solutions. The company specializes in producing larger parts with micro features, micro-sized parts, and micro automated assemblies, primarily serving the medical technology industry.

Los Angeles, CA

Based in Los Angeles, CA, Jedlick Molding offers custom plastic injection molding and precision mold making. The company specializes in parts requiring extremely tight tolerances and dimensional requirements, crucial for high-precision applications. They also provide prototyping, consulting, assembly, and distribution for diverse manufacturing clients.

Torrance, CA

Luminit designs and manufactures holographic light shaping diffusers, offering solutions including injection molded optics with precise beam control for mass production. Utilizing patented holographic technology, the company serves industries such as architectural lighting, LCD displays, biomedical devices, automotive, machine vision, and advanced sensing applications like LiDAR and 3D sensing.

Shelbyville, IN

Based in Shelbyville, IN, Makuta Micro Molding specializes in high-precision micro injection molding and mold tooling. They produce millions of zero-defect micro-to-small parts monthly in a 24/7, clean-room facility. Serving medical, pharmaceutical, microfluidics, electronics, and automotive industries, Makuta is ISO 9001 and ISO 13485 certified.

La Verne, CA

Based in La Verne, CA, Marman Industries specializes in precision plastic injection molding, mold fabrication, and contract manufacturing. They offer product development and custom engineering services for the medical device industry, dental components, electronics, and other sectors, known for high-quality plastic parts.

Wood Dale, IL

Based in Wood Dale, IL, Matrix Plastic Products, LLC specializes in precision injection molding, moldmaking, and assembly. They partner with medical device manufacturers to produce ultra-precise, micro molded components and sub-assemblies. With DFM expertise and ISO 13485 certification, they serve medical, electronics, and high-performance industries.

Saint-Gobain provides advanced micromolding services for complex medical devices, leveraging its proprietary micromolding process. The company delivers high-precision and repeatability, consistently maintaining tight tolerance targets for critical applications. They specialize in manufacturing small, intricate components for the medical sector.

Somerset, NJ

MICRO is an FDA and ISO 13485 certified medical device contract manufacturer based in Somerset, NJ. They provide full-service product development and manufacturing solutions, from concept to completion, specializing in finished medical devices and complex handheld assembly. The company offers advanced automation, R&D engineering, and operates an ISO Class 8 clean room for precision manufacturing.

Micro MIM USA Inc. specializes in manufacturing high-precision, complex metal components using its unique μ-MIM® technology. They mass-produce parts, ranging from a few millimeters to 10mm, with exceptional dimensional accuracy. The company processes hard-to-machine materials like stainless steel, titanium, and alloys for medical device and semiconductor industries.

Fort Worth, TX

Based in Fort Worth, TX, Micro Mold Plastics USA, Inc. is an ISO 9001:2015 / AS9100D certified and DDTC registered provider of micro molding services. The company offers extensive material experience, additional manufacturing capabilities, and comprehensive testing and inspections for precision plastic components.

Roseville, MI

Based in Roseville, MI, Midwest Mold specializes in precision small-scale and low-volume plastic injection molding services. They offer custom solutions, including production tooling, 2-shot, conventional, and pre-production molds. Midwest Mold focuses on delivering high-quality, small-run plastic parts for various customer needs.

New Rochelle, NY

Based in New Rochelle, NY, Mission Plastics, Inc. provides comprehensive plastic injection molding, including micro-molding, for medical, automotive, and commercial industries. Their ISO 13485 certified facility operates 24/7, offering solutions from tooling and prototyping to full production and fulfillment.

Lake Geneva, WI

Midwest Precision Molding, based in Lake Geneva, WI, specializes in custom plastic injection molding for tight tolerance and precision parts. They expertly produce gears, inserts, and bobbins utilizing over 40 advanced machines, including Sodick presses, and an onsite tool room. The company is ISO 9001:2015 certified.

Based in Boston, MA, Parallel Fluidics, Inc. specializes in rapid custom manufacturing of microfluidic devices. They leverage 'Transition Molding' to achieve molded part performance using thermoplastics like COC, COP, PMMA, and PC. The company offers fast iterations and on-demand production, scaling prototypes to hundreds monthly.

Based in Hudson, MA, Plastic Molding Manufacturing provides custom plastic injection molding services. They specialize in advanced manufacturing, including insert and two-shot molding, with precision tooling and tight tolerances. Offering ISO 8 cleanroom capabilities, they support medical applications and complex parts from DFM through high-volume production.

Based in Curtis Bay, MD, Precision MicroFab LLC specializes in micro-manufacturing solutions, including micro-molding. The company provides precision laser cutting, drilling, welding, and 3D bio-printing for complex components, primarily serving the medical device, life sciences, microelectronics, and aerospace industries.

Upland, CA

Based in Upland, CA, Precision Molded Plastics Inc. is a vertically integrated plastic injection molding company. They specialize in building custom molds and tooling, manufacturing plastic parts and products. This firm provides comprehensive services from design to final production.

Plymouth, MN

ProMed Molding is a contract manufacturer specializing in complex, intricately designed molded silicone and plastic components for highly regulated industries. They provide silicone and thermoplastic molding, assembly, and over-molding services. The company focuses on tight tolerance components, from prototype through production, serving medical, pharmaceutical, and defense markets.

Fort Worth, TX

Based in Fort Worth, TX, SigmaPro Engineering and Manufacturing specializes in precision micro injection molding for complex plastic parts. The company focuses on critical components, offering collaborative design and development partnerships. They serve diverse industries including medical, optical, aerospace, automotive, technology, and telecommunications.

Fort Worth, TX

Based in Fort Worth, TX, SigmaPro Molding is a contract manufacturer specializing in micro injection molding for complex plastic components. Established in 1999, they perfect design and manufacturing processes for critical parts, serving industries such as medical, optical, aerospace, automotive, technology, and telecommunications.

Kearney, NE

Based in Kearney, NE, Springboard Manufacturing specializes in ISO 13485:2016 certified custom plastic injection molding for medical devices. They offer comprehensive capabilities, including overmolding and insert molding, producing critical components like stents, implants, and sutures using various thermoplastic materials.

Kenton, OH

Pleasant Precision, Inc. is a Kenton, OH-based contract manufacturer, specializing in high-precision injection molds and custom molded products. They offer full-service tool making, guiding clients from design through to the finished part, with a focus on quality, reduced lead times, and cost savings.

Riverside, CA

Based in Riverside, CA, Trademark Plastics is a contract manufacturer providing high-precision injection molding, including micro molding, for the healthcare industry. They operate Class 8 cleanrooms and machines from 6 to 610 tons, offering full turnkey solutions from concept to production. The company is ISO 9001 and 13485 certified.

Elk Grove Village, IL

Veejay Plastic Inc., based in Elk Grove Village, IL, specializes in custom plastic injection and blow molding services. The company focuses on miniature injection molding, producing precise components from 1mg to 400gm. They offer comprehensive services including design, tooling, and assembly.

Tempe, AZ

Westfall Technik provides integrated plastics manufacturing services, specializing in precision micro molding and mold design. Based in Tempe, AZ, the company offers in-house tooling, assembly, and automation solutions. They serve the healthcare and consumer packaged goods markets, delivering complex parts with an end-to-end approach.

Based in Billerica, MA, Edge Precision manufactures precise microfluidic solutions and plastic consumables. The company offers compression and injection molding services, alongside assembly capabilities. They produce high-performance components with superior optical qualities, serving the diagnostic, medical device, and optics industries.

IMC Intertech LLC specializes in custom micro manufacturing services for medical devices and other fields. Capabilities include micro molding, micro milling, micro EDM, and laser micromachining. They provide micro sub-assemblies and micro-overmolding, operating with ISO 13485 certification. The company also offers rapid prototyping and instant online quoting.

Vicksburg, MI

Based in Vicksburg, MI, Miniature Custom Manufacturing (MCM) is a highly automated precision plastic injection molding and two-shot molding manufacturer. They specialize in custom plastic components, providing innovative and reliable solutions for various industries.

Jupiter, FL

Based in Jupiter, FL, MicruX Fluidic provides custom microfluidic design, fabrication, and manufacturing services. They specialize in SU-8 wafer master fabrication and precision plastic injection molding for microfluidic devices and Lab-on-a-Chip applications, also offering custom packaging and assembly.

Based in Charlton, MA, MTD Micro Molding manufactures minimally invasive devices and micro medical components from high-performance polymers. They provide comprehensive micro molding services, including design, tooling, molding, metrology, and assembly, ensuring tight tolerances and critical features within ISO Class 8 Cleanrooms.

Hopkins, MN

Based in Hopkins, MN, TPM specializes in precision injection molding, handling tight tolerance and complex geometry components. They provide injection, 2-shot, insert, and thermoset molding, alongside automated assembly and testing. The company supplies engineered plastic components to automotive, medical, consumer, and industrial sectors.

Clinton Twp, MI

Based in Clinton Twp, MI, Xcentric provides rapid injection molding, CNC machining, and additive manufacturing services from its US facilities. The company offers a comprehensive portfolio for various injection molding needs, from prototyping to manufacturing, assisting clients in bringing concepts to market faster.

Ankeny, IA

Based in Ankeny, IA, Accumold is a vertically-integrated provider specializing in high-volume precision micro molding and tooling. With 40 years of expertise, they develop micro parts and offer micro additive manufacturing for prototyping. Accumold serves medical, micro electronics, polymer optics, and automotive industries.

Longmont, CO

Based in Longmont, CO, AIM Processing specializes in small plastic injection molding for complex parts. Operating 37 presses 24/7, they deliver cost-effective, high-quality components. Offerings include custom injection molding, insert molding, overmolding, and engineering support for diverse sectors like medical, automotive, and electronics.

Beacon MedTech Solutions is a manufacturer specializing in precision plastic injection molding services. The company supplies custom components for leaders across various industries including Medical, Bio-Pharma, Aerospace, Defense, and Electronics, focusing on high-quality, intricate parts.

Hartland, WI

Fathom Manufacturing is a contract manufacturing partner specializing in high-precision, small parts for demanding industries. They offer tailored services, utilizing advanced engineering to mold multiple components in single tools for quick production. Fathom serves critical sectors including aerospace, medical, automation & robotics, semiconductor, and automotive, emphasizing quality and tight tolerances.

Forum Corporation specializes in micro molding services, with over 30 years of experience in injection, insert, and over molding. They offer ISO Class 7 certified cleanroom molding and assembly, serving the medical industry. Capabilities include rapid prototyping, complex geometries, and comprehensive project support.

Riverside, CA

Based in Riverside, CA, Micromold, Inc. is a provider of high-quality injection molded plastic products and services. With a name suggesting specialized expertise, the company likely offers precision micro molding for diverse industrial applications, focusing on custom components and solutions.

Costa Mesa, CA

JG Plastics Group LLC, based in Costa Mesa, CA, specializes in precision injection molding, encompassing advanced micromolding and thermoset molding. Leveraging scientific molding principles and extensive experience, they produce demanding, close tolerance parts. The company operates 23 injection presses, offering comprehensive molding solutions for diverse applications.

Brea, CA

Based in Brea, CA, M.R. Mold & Engineering designs and manufactures liquid silicone rubber (LSR), gum stock, and plastic injection molds. They specialize in micro molding, overmolding, and insert mold solutions for complex geometries, serving B2B customers since 1985.

Barberton, OH

Based in Barberton, OH, Ohio Precision Molding, Inc. offers comprehensive injection molding services, including design and engineering, material selection, and short-run manufacturing. They also provide assembly and molded parts decorating, focusing on solving complex challenges for their industrial clients.

Scottsdale, AZ

Based in Scottsdale, AZ, Plastic Design Company (PDC) specializes in precision injection molding and micro-molded solutions for medical, diagnostics, and biotechnology OEMs. They offer in-house tool design and mold fabrication, using high-performance thermoplastics like PEEK and COC. All production occurs in an ISO 8 Cleanroom.

Plastics Plus Technology, Inc. is a woman-owned, USA contract manufacturer specializing in close-tolerance custom plastic injection molding. They provide ISO 9001:2015, ISO 13485:2016 certified, and FDA registered services for medical, automotive, dental, and electronic components.

San Antonio, TX

Based in San Antonio, TX, Precision Group provides comprehensive solutions in tooling, injection molding, and engineering services. They transform design concepts into high-quality products, emphasizing precision techniques and advanced materials. The company serves diverse sectors including medical devices, automotive, consumer electronics, and energy industries.

Pleasanton, CA

Based in Pleasanton, CA, Rapidwerks, Inc. specializes in Micro Molding, Injection Molding, and Over Molding services. With over 25 years in the medical device industry, they also provide tool fabrication for close tolerance plastic parts. The company focuses on solving challenging molding problems.

Spectrum Plastics specializes in precision micromolding services, employing specialized equipment, tool designs, and advanced measurement systems. With extensive medical device experience, the company delivers comprehensive solutions from initial concepts to final products, including extruded tubing, catheter technologies, and medical balloons.

Norco, CA

Based in Norco, CA, SR Plastics is a 50-year veteran in precision injection molding. They offer custom solutions using engineered plastics, meeting specific tolerance requirements. In-house secondary operations, including sonic welding, overmolding, and machining, support diverse industries like industrial, aerospace, and medical.

Fort Worth, TX

Superior Plastics, located in Fort Worth, TX, offers precision plastic injection molding and mold building services. Utilizing 42-ton and 85-ton presses, they manufacture intricate components for electronics, military, and telecommunications. The company maintains ISO 9001:2015 and AS9100D certifications, ensuring repeatable, high-quality manufacturing processes.

Shelbyville, IN

Based in Shelbyville, IN, Thunderbird Molding provides high-precision custom plastic injection molding and contract manufacturing services. Their comprehensive offerings include mold design, prototyping, engineering, production, and assembly. The company works to help clients realize cost improvements and reach performance potential with their advanced manufacturing solutions.

Livermore, CA

Based in Livermore, CA, Westec Plastics is an ISO 13485:2016 certified plastic injection molding organization. They offer turnkey injection molding, mold building, and secondary operations from their clean room facilities. Westec serves diverse sectors including medical, aerospace, consumer products, and electronics.

San Leandro, CA

KS Plastics is a custom injection molding and contract manufacturing company specializing in precision plastic injection molding. They serve various market segments including medical devices, diagnostics, pharmaceuticals, electronics, and automotive. Capabilities include clean room injection molding, precision tooling, prototyping, and secondary operations.

Viant Medical specializes in micro-molding ultra-small, tight-tolerance medical device components with complex geometries. They craft solutions for diagnostics, drug delivery, and interventional devices, leveraging extensive manufacturing capabilities for the MedTech industry.

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How to Choose a Company

  • Verify they possess specific equipment like specialized micro-injection molding machines (e.g., Babyplast, Wittmann Battenfeld MicroPower) and demonstrate proficiency in handling shot weights under 0.1 gram with consistent cavitation for high-volume runs.
  • For medical or aerospace applications, require specific certifications such as ISO 13485 or AS9100, and critically, inquire about their validated process for maintaining sub-micron tolerances in a controlled environment, potentially Class 10,000 or cleaner.
  • Thoroughly vet their tooling expertise: a red flag is a supplier who outsources 100% of their micro-tooling design and fabrication without significant in-house oversight or demonstrable success with complex, interchangeable inserts or hot runner systems for miniature parts.
  • Insist on a detailed Design for Manufacturability (DFM) review specific to micro-features, paying close attention to recommended gate locations, draft angles for ejection of tiny parts, and strategies for minimizing gate vestige, which can be a critical functional requirement for micro-components.

Supplier Types at a Glance

TypeBest ForTypical MOQ
Pure-Play Micro Molding SpecialistsExtreme miniaturization, sub-micron tolerances, complex micro-features, medical/aerospace, exotic materials.1,000 - 1,000,000+ (depending on part complexity and tooling investment)
Precision Molders with Micro CapabilitiesParts requiring tight tolerances but not extreme miniaturization, broader material range, often integrated with other assembly services.5,000 - 5,000,000+
Integrated Solutions ProvidersTurnkey projects from design to assembly, complex multi-shot or overmolding, full product lifecycle support, often for high-volume consumer electronics or automotive.10,000 - 10,000,000+

Frequently Asked Questions

How do micro molding companies typically manage tooling costs for low-volume, high-precision projects?

For low-volume, high-precision micro molding, suppliers often leverage modular tooling designs with interchangeable inserts or utilize soft tooling for initial runs and rapid prototyping. This approach allows for iteration and reduces the upfront investment compared to a full Class 101 hardened steel mold. It's crucial to discuss lifetime tooling guarantees and the potential for incremental tooling upgrades as volumes increase.

What are the critical considerations for material selection when molding parts with sub-millimeter features?

Material selection for sub-millimeter features goes beyond typical mechanical properties. You must consider melt flow index for filling tiny cavities without shear degradation, thermal stability to prevent warping or degradation during processing, and shrinkage rates for maintaining tight tolerances. For medical devices, biocompatibility and sterilization compatibility (e.g., gamma, EtO, autoclave) are paramount, often guiding choices towards specific medical-grade PEEK, LCP, or bioresorbable polymers.

How can I validate a micro molding supplier's ability to consistently hold sub-micron tolerances?

To validate a supplier's tolerance capabilities, request documented process capability studies (Cpk/Ppk) on similar parts, inquire about their metrology equipment (e.g., CMM with high-magnification vision systems, optical comparators, SEM), and demand a comprehensive first article inspection (FAI) report with detailed dimensional data. A robust quality management system and evidence of rigorous in-process monitoring are non-negotiable.

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