Plastic Injection Molding
Plastic Injection Molding Expertise You Can Trust
Brunk offers a complete contract manufacturing package by encompassing a quality-driven plastic molding capability, delivering end-to-end injection molding services—from injection mold design and moldmaking through validation, production, and assembly. As a trusted partner to medical device manufacturers, industrial OEMs, and consumer brands, we bring precision, speed, and scalability to every program. Through our injection molding partners, our plastic injection molding team and toolmakers blend solid modeling, 3D printing, and advanced metrology with scientific plastic injection molding to produce complex parts with repeatable results. With high volume molding capacity, turnkey molding solutions, and a disciplined focus on continuous improvement, Brunk stands among leading contract manufacturing companies for reliability and performance.
From micro medical components to robust housings, our custom injection molding capabilities can offer clean room production, precision overmolding, and specialised healthcare molding workflows. Whether you need rapid prototypes, pilot runs, or long-term production with tight traceability, Brunk’s plastic injection molding services deliver consistent quality, shortened launch timelines, and lower total cost of ownership.
What Is Plastic Injection Molding?
Plastic injection molding is a highly repeatable manufacturing process that forms accurate plastic parts by injecting molten polymer into a precisely engineered cavity. The resin cools, solidifies, and is ejected—then the cycle repeats—enabling high volume molding of complex geometries with tight tolerances. Brunk applies robust injection mold design principles, advanced cooling strategies, and disciplined process windows to ensure consistent fill, superior surface finish, and dimensional stability at scale.
Our plastic injection molding services integrate the machine, the tooling, and the process science. Pellets feed through a heated barrel, a reciprocating screw meters the melt, and material is driven into the mould under controlled pressure and temperature. Gate design, venting, cooling circuits, and ejection systems are engineered for precision, cycle efficiency, and longevity. Compared to other forming methods, injection molding excels at fine details, multi-cavity production, insert and precision overmolding, and complex part consolidation—ideal for medical device assemblies, electronics, and demanding consumer applications.
Brunk’s Injection Molding Services and Capabilities
We offer comprehensive custom injection molding programmes alongside our partners, which are tailored to your application, industry standards, and cost targets. Capabilities include:
Injection mold design and moldmaking with 3D printing and solid modeling support for faster iterations and validated tooling.
Press range from 15 ton mold press for micro medical features to 300 ton mold press for larger, structural parts—scalable high volume molding.
Clean room manufacturing is available for healthcare molding and medical device components requiring strict environmental controls.
Precision overmolding and insert molding for integrated seals, grips, electrical connectors, and multi-material assemblies.
Reel to reel molding for continuous, automated component handling in electronics and specialty applications.
Turnkey molding solutions including DFM, material selection, validation, automated inspection, and downstream assembly.
Our injection molding services leverage scientific molding techniques, and real-time monitoring to stabilise processes and reduce scrap. Through continuous improvement and data-driven optimisation, we deliver shorter validation cycles, robust capability indices, and dependable throughput across global plastic injection programmes.
Materials and Engineering Support
Brunk’s plastic injection molding team matches resin families and grades to functional and regulatory needs, with experience across ABS, PP, PE, PC, PA, PBT, and POM. We evaluate melt flow, shrinkage, cooling behaviour, and mould release to ensure manufacturability and performance. Additives and fillers—from impact modifiers to glass fibre—are specified to fine-tune mechanical properties, aesthetics, and compliance for medical device, industrial, and consumer applications.
Our engineering support combines solid modeling, virtual flow analysis, and rapid tooling trials. 3D printing helps speed prototype evaluation and insert fit-up, while injection mold design incorporates robust gating, cooling, and ejection for tight cycle times. Whether it’s micro medical features or large-format housings on a 300 ton mold press, we optimise geometry, wall thickness, draft, and ribbing to minimise warpage, sink, and rework—delivering production-ready plastic injection molding outcomes.
Applications and Industries Served
Brunk’s injection molding services span healthcare molding for medical device enclosures, disposables, and precision sub-assemblies; electronics connectors and housings; consumer goods closures and appliance components; industrial handles, guards, and gears; and packaging caps and dispensers. As a contract manufacturing company offering turnkey molding and precision overmolding expertise, we support projects from micro-scale parts with a 15 ton mold press to multi-cavity, high volume molding on a 300 ton mold press.
Typical products include tight-tolerance housings, clips, bezels, knobs, fasteners, fluid-management components, wire-management features, and protective covers. For micro medical and healthcare molding, clean room operations, process discipline, and traceability protect critical-to-quality features and compliance. For electronics and industrial markets, we utilise reel to reel molding, automation, and robust tooling to meet demanding cycle time and reliability targets.
Quality, Compliance, and Continuous Improvement
Quality is embedded at every stage of our plastic injection molding workflow. Brunk applies documented procedures, traceability, first article inspections, capability studies, and SPC to assure consistency from lot to lot. With clean room environments and healthcare molding controls support medical device compliance and reliable performance in regulated markets.
We champion continuous improvement across tooling, process parameters, and materials—leveraging real-time data, preventive maintenance, and standardised work. Whether delivering custom injection molding for a startup or scaling high volume molding for a global plastic injection programme, our plastic injection molding services focus on defect prevention, reduced variation, and predictable lead times.
Why Choose Brunk as Your Molding Company
Selecting the right plastic molding company impacts cost, speed, and reliability. Brunk offers:
End-to-end injection molding services: DFM, injection mold design, moldmaking, validation, production, and assembly.
Breadth of capability: clean room healthcare molding, precision overmolding, reel to reel molding, micro medical parts, and large-format components.
Scalable press fleet: 15 ton mold press to 300 ton mold press supporting prototypes through high volume production.
Engineering depth: modeling, 3D printing, and mold flow analysis to accelerate launch and de-risk production.
Trusted leadership: proven results as a contract manufacturer across medical device, electronics, consumer, and industrial sectors with global plastic injection programmes.
Partner with Brunk for custom injection molding projects backed by disciplined quality, turnkey molding solutions, and continuous improvement. As one of the experienced plastic injection molding companies, we turn complex designs into manufacturable, high-quality parts—on time and at scale.
Get Started
Ready to move from concept to production with confidence? Contact Brunk for plastic injection molding services that combine precision, speed, and scalability. Bring us your toughest challenges—we’ll deliver a custom injection molding solution with the right materials, tooling, and process controls. From micro medical components on a 15 ton mold press to multi-cavity programmes on a 300 ton mold press, our molding projects are built to perform.
Explore our precision overmolding, reel to reel molding, and turnkey molding offerings, and see why leading teams trust Brunk for global plastic injection success. Let’s accelerate your path to market with engineering excellence, rigorous quality, and continuous improvement at every step.
Frequently Asked Questions
Can you provide a complete manufacturing solution beyond injection molding?
Yes. Injection molding is often only one stage of the manufacturing process. We can coordinate additional operations such as insert molding, overmolding, precision machining, laser processing, pad printing, ultrasonic welding, automation, assembly, packaging, inspection, and final testing. By combining our in-house capabilities with specialist partner expertise where appropriate, we deliver fully finished components and assemblies ready for integration into your product.
Can you support Design for Manufacturing (DFM) during product development?
Yes. Our engineering team works with customers during the early stages of product development to optimise component designs for injection molding. We provide Design for Manufacturing (DFM) guidance covering part geometry, wall thickness, draft angles, gate locations, material selection, tolerances, and tooling considerations. Early collaboration helps reduce tooling revisions, improve manufacturability, and accelerate time to market.
Which materials can you mould?
We work with a wide variety of engineering and medical-grade thermoplastics, selecting materials based on the functional, regulatory, and environmental requirements of the application. Common materials include PEEK, PEI (Ultem®), PPSU, PC, ABS, POM (Acetal), Nylon (PA), Polypropylene (PP), Polycarbonate, and many other high-performance polymers. Brunk has compounding partners to get our customers the required additive into your resin of choice, be it glass fiber, radiopaque material, etc. Our engineering team can assist with material selection to optimise component performance, manufacturability, and cost.
What types of plastic injection molding projects do you support?
We support a broad range of plastic injection molding projects for the MedTech and high-tech industries, from prototype development through to high-volume production. Whether a project is best suited to our in-house manufacturing capabilities or to one of our qualified manufacturing partners, we provide a single point of contact throughout the project. This ensures consistent project management, quality oversight, and supply chain coordination from concept to production.
Do you only manufacture parts in-house?
It depends, as this is a new and growing capability within Brunk. While we have extensive in-house manufacturing expertise, we also leverage a carefully selected network of trusted manufacturing partners to provide the most appropriate solution for each project. This flexible approach allows us to offer a wider range of molding technologies, tooling options, production capacities, and geographic supply chain solutions while maintaining technical oversight, quality assurance, and programme management through a single manufacturing partner.
