Posi-Melt™ Custom Screw Design
Never one-size-fits-all, our Posi-Melt™ screws are engineered specifically for your materials, machines, and production goals with precision feed, compression, and metering zones for optimal melt quality.
MD Plastics delivers precision-engineered injection molding screw parts and expert repair services to Houston's thriving manufacturing sector. With over 25 years of innovation, our patented Posi-Melt™ screws and custom-designed components optimize melt quality, reduce downtime, and extend equipment life for injection molders across the Gulf Coast region. From emergency repairs to complete screw redesigns, we provide the technical expertise and rapid turnaround that Houston's fast-paced industrial operations demand.
Comprehensive screw design, manufacturing, repair, and process optimization solutions for Houston-area injection molders and extrusion processors.
Never one-size-fits-all, our Posi-Melt™ screws are engineered specifically for your materials, machines, and production goals with precision feed, compression, and metering zones for optimal melt quality.
Patented performance valves that improve shot-to-shot consistency by up to 58%, reduce cycle times by 20%, and extend maintenance intervals—proven in medical-grade molding applications.
Expert repair services using high-quality tool steels and proprietary surface treatments including nitriding, PTA welding, and HVOF tungsten carbide coatings to restore performance and resist wear.
Modify your existing equipment for Liquid Silicone Rubber processing, expanding your capabilities to include medical-grade silicone parts without purchasing dedicated LSR equipment.
Upgrade your injection units with venting capabilities to eliminate gases and volatiles during plasticating, essential for hygroscopic materials and high-quality applications.
Partner with our engineers to assess material behavior, troubleshoot process inefficiencies, and redesign systems for improved performance—from quick upgrades to ground-up solutions.
Houston's industrial sector demands reliability and precision. Our injection molding screw systems combine 25+ years of plasticating expertise with patented technologies like Posi-Melt™ and Melt-IQ™ to deliver measurable improvements in melt quality, productivity, and equipment longevity. We don't just manufacture parts—we engineer complete solutions tailored to your specific materials, processes, and quality requirements. Whether you're running medical-grade polymers, automotive components, or high-volume consumer products, our custom-designed screws and barrels optimize every phase of the plasticating cycle. With proprietary design software that calculates heat transfer, shear rates, and pressure profiles, we eliminate guesswork and deliver consistent, repeatable results that reduce scrap and maximize your ROI.
Delivering measurable results for injection molders across automotive, medical, electronics, and consumer goods manufacturing.
Over two decades of plasticating innovation backed by eight patents and proven results.
Eight issued patents including Posi-Melt™ screws, Mini-Shut™ nozzles, and Inject-EX™ systems—technologies that deliver real performance improvements.
Deep understanding of Gulf Coast manufacturing needs, from high-humidity processing challenges to rapid turnaround requirements for Houston's 24/7 production environments.
From initial consultation and math modeling through manufacturing, testing, tuning, and ongoing support—we partner with you throughout the entire process lifecycle.
Documented improvements of 58% better shot consistency, 20% reduced cycle times, and 30% extended maintenance intervals with our engineered solutions.
Industry leadership backed by decades of plasticating expertise.
Founder
Mike Durina brings unparalleled expertise to plastic manufacturing quality systems with an AAS in Plastic Engineering from Ferris State University and a BS in Industrial Engineering from Kent State University. His career began in 1978 working for injection molding firms before joining Spirex in 1984, where he served as VP of Sales & Service for 16 years. Under his leadership, Mike grew Spirex from $1.8 million and 18 employees to $22 million and 180 employees. In 1999, he founded Md Plastics Inc. with a deep understanding of plasticating unit importance in injection molding processes. Mike has been awarded eight patents with one pending, including innovations like the Melt Profiler™, Inject-EX™, Mini-Shut™, and MDP™ Performance Valve. His technical knowledge and disciplined approach to providing the right solutions has made Md Plastics a trusted partner for manufacturers seeking to enhance quality and profitability through innovative plasticating solutions and cutting-edge technologies.
We repair and manufacture custom screws for all major injection molding machine brands and sizes. Our expertise covers standard plasticating screws, barrier screws, mixing screws, and specialized designs for materials ranging from commodity plastics to engineering resins, LSR, and medical-grade polymers. We can also retrofit older equipment with modern screw technology.
Our plasticating experts are ready to discuss your unique requirements and recommend the optimal solution.
Industry-leading innovations in plasticating technology
Trusted expertise since 1999
Serving industry leaders worldwide
Contact our Houston-area team for a free consultation. We'll analyze your current setup and recommend solutions to improve quality, reduce costs, and increase productivity.
For immediate assistance, feel free to give us a direct call at 3304825100. You can also send us a quick email at info@mdplastics.com.
For immediate assistance, feel free to give us a direct call at 3304825100. You can also send us a quick email at info@mdplastics.com.