A Leader in Texas injection molding & mold transfer services

At Metro Custom Plastics, we offer a comprehensive range of plastic injection molding services tailored to meet diverse project requirements. Our capabilities include:

• Materials: We work with all thermoplastic materials, including virgin or recycled options such as re-processed plastic, polyethylene, polypropylene, ABS, acrylic, nylon, polycarbonate, polyester, and styrene.

• Part Sizes & Weights: We can mold parts weighing up to 5 pounds with a shot size of up to 80 oz and clamping forces ranging from 230 to 650 tons. We handle thicknesses of up to .250 inches and part areas up to 480 in².

• Mold Design & Cavities: We accommodate molds with up to 64 cavities, allowing for efficient production runs of all sizes, from prototypes to full-scale production.

• Reshoring & Mold Transfers: We offer seamless reshoring and mold transfer services to bring your production closer to home.

• Assembly & Secondary Services: Our services extend beyond injection molding to include assembly, engineering, and drop shipping.

• Lead Times: Typical production lead times are 2-3 weeks, with tooling taking 8-10 weeks.

Our commitment to quality control and first-article documentation ensures that your project is handled with the highest standards of precision and efficiency.

Metro Custom Plastics offers Outsource Molding services designed to help businesses increase their manufacturing capacity and streamline production. With advanced injection molding capabilities and robotic systems, we can manage your tooling and efficiently handle large or small production volumes, allowing you to focus on your core business operations.

Our central U.S. location ensures shipping efficiency, reducing lead times and transportation costs for businesses across the country. We specialize in seamless tooling transfers, making it easy to move your molds to our facility for increased capacity without disruptions. Whether you need support with overflow production or want to reshore your molding operations, we have the expertise and infrastructure to deliver high-quality results.

With robotic automation integrated into our processes, we guarantee precision and consistency, ensuring that your parts meet the highest quality standards. At Metro Custom Plastics, we are committed to providing cost-effective, scalable, and reliable solutions for your outsourced molding needs.

At Metro Custom Plastics, our in-house tool room is fully equipped with advanced CNC technology to design and manufacture high-precision stainless steel molds. We specialize in creating molds built for longevity, high-volume production, and tight tolerances, ensuring maximum performance with no maintenance or repair charges while tools are operating under our management.

Our molds are engineered using stainless steel bases and cavities to guarantee durability and consistency across long production runs. Each mold is tailored to support complex geometries, variable wall thicknesses, and optimized cycle times, delivering reliable, repeatable results.

We integrate tool design and construction directly with our injection molding services, providing customers with a seamless, end-to-end solution. From concept to production, our tooling process includes Design for Manufacturability (DFM), early design involvement, and Mold Flow analysis to ensure efficient part production and superior mold performance.

Tooling costs and design considerations are driven by factors such as core/cavity machining, number of cavities, mold base configuration, and part complexity. Our team works closely with clients to balance performance and investment for each project.

Our tooling capabilities include:

• Modern equipment such as CNC, EDM, mills, grinders, lathes, and drills

• Metrology lab tools featuring CMMs and optical inspection systems

• Advanced CAD/CAM (Unigraphics NX) and Mold Flow simulation software

• Dimensional accuracy within ±0.01 mm

• Support for a wide resin range including PP, ABS, PC, and engineering plastics like PEEK

We offer tooling in a variety of materials—steel, aluminum, graphite, and silicone—and can produce multiple mold types such as single-cavity, multi-cavity, cold runner, hot runner, insert molding, overmolding, unscrewing molds, and cavity inserts.

Typical mold build lead times range from 4 to 12 weeks, depending on complexity, with expedited options available for rapid tooling needs. Additionally, tool transfer services are available for clients looking to relocate or re-qualify existing molds.

By combining mold design, fabrication, and molding operations under one roof, Metro Custom Plastics maintains complete oversight of tool performance and quality—ensuring precision, efficiency, and customer satisfaction in every project.

Many companies seek ways to boost efficiency, cut costs, reduce freight expenses, and improve product quality. One effective strategy to achieve these goals is transfer tooling—but what exactly does that entail, and when is it the right move?

Transfer tooling refers to relocating existing injection molds from one manufacturing facility to another. Businesses may choose this option for various reasons, including lowering production costs by moving to a facility with more competitive rates, addressing capacity limitations at their current supplier, or upgrading product quality by leveraging a more advanced or specialized molder. It can also support strategic goals, such as relocating closer to end markets or key parts of the supply chain to reduce lead times and freight expenses. When done correctly, transfer tooling can lead to improved quality, operational efficiency, and long-term savings. Metro Custom Plastics is equipped to guide you through a seamless mold transfer process.