Founded in 1968 and based in Milwaukee, Wisconsin, Triangle Tool LLC is a premier, full-service provider of custom injection molds, large-format machining, and specialty tooling solutions. From multi-cavity molds and stack tooling to heavy machining and fluid-end components, TT specializes in large, tight-tolerance, highly detailed work others can’t take on. Our team provides full-service support, design, build, machining, assembly, and sampling to ensure every project is delivered with the quality and reliability our customers expect.
Minco Tool & Mold Inc.
Injection Mold Building, Specialized Machining and Custom Injection Molding | Minco Tool and Mold, Inc. is a proven leader in injection mold manufacturing offering product design, mold design, full mold build and repair services, and precision machining. Based in Dayton, OH with decades of experience, our credentials also include ISO-9001:2015 & ITAR certifications. Minco offers both domestic & global tool builds, and our experienced professional staff can support all your project requirements. We currently serve a wide variety of markets and applications including automotive, appliance, consumer goods, defense, and aerospace and are looking to expand into new and different markets. All Service Plastic Molding, Inc. (ASPM) provides plastic injection molding services specializing in complex plastic parts and assemblies for the automotive, consumer, appliance, and similarly demanding product spaces. Located in Vandalia, Ohio. We are actively working to expand our reach into new industries and with new customers. ASPM’s expertise includes (but is by no means limited to) two-shot molding, insert molding, vibration welding, pad printing. Since day one, The Minco Group has sought to partner with those we serve, helping them leverage our capabilities for their own competitive advantage. For more information on The Minco Group, visit our web site at www.mincogroup.com.
HTT USA Inc
HTT USA is specialized deep hole drilling technology. Deep hole drilling has been widely used in the making of Plastic Injection Mold and Compression Mold in machining Water Lines and Venting Passages which can not be done on conventional machining centers. Our shop is conveniently located in outskirts of Chicago at Grayslake, 40-minute drive from O’Hare Chicago International Airport, easily accessible from highway 94. We have the experience and expertise to drill precision hole with Length/Diameter ratio > 100 for even the most difficult applications to meet your specific size, tolerance and materials. Our staff at HTT USA constantly strives to improve our operations to provide the best and most economic deep hole drilling solutions to our customers at competitive price and short turn around time. Our goal is to meet the customers requirements from start to finish.
A-1 Tool Corporation
Established in 1946, A1 Tool Corporation is a U.S.-based leader in complex plastic injection mold manufacturing, with a legacy built on precision, performance, and long-term customer partnerships. From high-output bucket and thin-wall packaging molds to multi-shot, multi-action, stack, tandem, modular, and T-molds (toggle), A1 engineers and builds tooling systems designed for durability, efficiency, and optimized production performance. Our vertically integrated team of engineers, designers, CNC and EDM machinists, and master toolmakers supports every phase of the mold lifecycle — from concept and DFM guidance through build, validation, refurbishment, and ongoing service. With advanced automation, rigorous inspection protocols, and a culture rooted in craftsmanship, A1 delivers tooling systems that meet demanding cycle times, tight tolerances, and high cavitation requirements. Supporting our mold building expertise is in-house injection molding capacity for tryouts, sampling, validation, and production support, allowing our team to conduct thorough mold testing, refine process parameters prior to launch, and support bridge, short-run, or contract manufacturing as needed. By combining advanced engineering, precision manufacturing, and hands-on molding experience, A1 ensures every tool leaves our facility production-ready and aligned with customer performance goals. For nearly eight decades, A1 has been trusted by leading manufacturers who demand reliability, repeatability, and long-term production success. We don’t just build molds — we build performance-driven production systems designed to run.