At Brown Tool & Mold we design, manufacture and source world class injection mold.
Visit Us
- 86 Waterfall Trail Nebo, NC 28761
- 937-620-4261
- [email protected]
OPENING HOURS
- Monday - Friday:
- 7 AM - 4:30 PM
- Saturday:
- 7 am - 11 am
Brown Tool & Mold is a precision injection mold manufacturer specializing in the design and construction of custom production tooling. We engineer and manufacture injection molds for manufacturers that require consistent part quality, stable cycle performance, and long mold service life — backed by our BTM MoldGuard™ warranty program.
Our capabilities include mold design engineering, CNC machining, EDM processing, and complete mold assembly performed by experienced toolmakers. Each mold is developed to support efficient molding operations, reliable maintenance, and long-term production performance. We work with manufacturers across automotive, medical, consumer, agricultural, and industrial markets from our facility in Nebo, North Carolina.
Every mold program at Brown Tool & Mold begins with a thorough review of part geometry, material requirements, and production volume. This engineering-first approach allows us to design tooling that performs reliably from first shot through millions of production cycles. Whether you need a single-cavity prototype tool or a high-volume multi-cavity production mold, we build to the tolerances and specifications your program demands — with ±0.0005″ tolerances as standard.
Injection mold performance is heavily influenced by cooling design and thermal management. In most molding applications, cooling time accounts for the largest share of overall cycle time — often 50 to 70 percent — making it the single biggest lever for improving production efficiency and reducing cost per part.
Traditional cooling methods using straight drilled waterlines can limit how effectively heat is removed from complex part geometry. Cores, deep ribs, and areas far from a straight channel are difficult to cool uniformly. Uneven cooling leads to longer cycle times, temperature imbalance across the cavity, and an increased risk of warpage, sink marks, or dimensional variation in the finished part.
Advanced cooling strategies, including conformal cooling inserts produced through metal 3D printing, allow cooling channels to follow the contour of the part geometry rather than running in straight lines. This brings coolant closer to the mold surface in critical areas, improves heat extraction rates, and supports more uniform mold temperatures throughout the cycle.
At Brown Tool & Mold, cooling system design is integrated into the mold engineering process from the start — not added as an afterthought. We evaluate gate location, cooling circuit layout, and thermal balance alongside part geometry and steel selection to deliver tooling that performs efficiently from the first production run. For programs where cycle time and part quality are critical, our metal additive manufacturing capability allows us to produce conformal cooling inserts in-house as part of a complete tooling solution.
Single-cavity injection molds are the preferred solution for complex parts, tight-tolerance components, and lower-volume production programs where process control and part quality are the primary priorities. By producing one part per cycle, engineers can closely manage filling behavior, cooling efficiency, packing pressure, and dimensional stability — making this configuration well suited for medical device components, precision industrial parts, and any application where part-to-part consistency is critical.
Brown Tool & Mold designs single-cavity molds with optimized gating, balanced cooling circuits, and hardened wear surfaces to ensure consistent molding performance over the tool’s full production life. Steel selection — including P20, H13, and stainless options for medical and corrosive material applications — is matched to the expected cycle volume and material requirements of each program. Every single-cavity mold we build is eligible for coverage under BTM MoldGuard™, our structured mold warranty and lifecycle documentation program.
Multi-cavity injection molds are engineered to increase production efficiency by manufacturing multiple identical parts in each molding cycle. These molds are the standard choice for high-volume manufacturing programs in packaging, automotive, consumer goods, and agricultural equipment — where consistent part quality, stable cycle times, and efficient production output are directly tied to program profitability.
Designing a multi-cavity mold requires careful engineering to ensure balanced filling, uniform cooling, and synchronized part ejection across every cavity. Imbalanced runner systems, uneven cooling loads, or inconsistent gate sizing can result in cavity-to-cavity variation that affects part quality and increases scrap rates. Brown Tool & Mold develops multi-cavity tooling with balanced runner systems — including hot runner configurations for material-sensitive applications — optimized cooling layouts, and durable component design to maintain uniform part quality and reliable long-term production performance. Learn more about our hot runner and cold runner capabilities below, or review our full mold design process.
Cold runner molds use an unheated runner system to deliver molten plastic from the machine nozzle through a network of channels into the mold cavities. After each cycle, the runner solidifies along with the part and is either trimmed and discarded or — in the case of three-plate cold runner designs — automatically separated during ejection.
Cold runner tooling is generally lower in initial cost and simpler to maintain than hot runner systems, making it a strong choice for lower-volume programs, materials that are sensitive to heat history, or applications where color changes are frequent. The tradeoff is runner scrap and the additional cycle time associated with cooling a larger volume of plastic per shot.
Brown Tool & Mold fabricates cold runner molds with precisely machined runner geometry, optimized gate sizing for the target material, and balanced flow paths to promote even filling across all cavities. Our CNC machining and EDM capabilities allow us to hold the tight tolerances required for consistent gate performance over millions of cycles.
Hot runner molds maintain molten plastic within a heated manifold system between shots, delivering material directly into the mold cavities without producing a solidified runner. This eliminates runner scrap, reduces cycle time by removing the need to cool and eject the runner, and allows for more precise gate control — particularly valuable in multi-cavity tools running high-volume programs.
Hot runner systems require a higher upfront investment and more careful maintenance than cold runner tooling, but the material savings and cycle time improvements typically generate a fast return on investment in high-volume applications. They are particularly well suited for engineering resins, multi-cavity packaging tooling, and programs where gate vestige on the finished part must be minimized.
Brown Tool & Mold integrates hot runner systems with precision thermal control, balanced manifold design, and gate configurations matched to the part geometry and material requirements of each program. We work with leading hot runner system suppliers and can advise on the right configuration for your application. For a deeper look at how runner system design integrates with overall mold performance, see our Injection Mold Design page and Cooling Design Guide.
Brown Tool & Mold is based in Nebo, North Carolina, in the western foothills of the Blue Ridge Mountains. From our facility, we support customers across the United States with complete injection mold programs — from initial DFM and mold design through mold manufacturing, precision machining, metal 3D printing, and ongoing mold service and repair.
For programs requiring lower-cost offshore tooling, our Global Mold Sourcing program gives customers access to vetted manufacturing partners in China, Vietnam, Malaysia, and Taiwan — managed from our U.S. headquarters with full documentation and a pre-shipment Buy-Off process. Every globally sourced mold is backed by the same BTM MoldGuard™ warranty and lifecycle support program as our domestically built tooling.
Our goal on every program is to deliver tooling that runs reliably, is properly documented, and is supported for the full production life of the mold. If you are evaluating injection mold suppliers for an upcoming program, we welcome the opportunity to review your part design and provide a detailed quote. Contact Brown Tool & Mold or visit our blog for technical resources on mold design, DFM, and tooling best practices.
At Brown Tool & Mold we design, manufacture and source world class injection mold.