Custom Posi-Melt™ Screws
Precision-engineered plasticating screws designed specifically for your materials, machines, and production goals. Never one-size-fits-all solutions.
Transform your injection molding operations with Columbus' most innovative plastic processing solutions. From custom screw designs to complete melt delivery systems, we engineer precision components that boost productivity, reduce waste, and maximize profitability for manufacturers throughout central Ohio's thriving industrial corridor.

Comprehensive plastic processing solutions from custom component design to complete system integration.
Precision-engineered plasticating screws designed specifically for your materials, machines, and production goals. Never one-size-fits-all solutions.
Revolutionary injection molding technology featuring stationary screws and improved melt quality control for superior part consistency.
High-performance MDP™ and Posi-Shut™ valves that improve shot consistency, reduce cycle times, and extend equipment life.
Expert consultation and system design to optimize your plastic processing operations, troubleshoot issues, and improve performance.
Melt-Profiler™ and Melt-IQ™ systems for real-time temperature monitoring and precise process control in critical applications.
LSR conversions, vented barrel modifications, and injection unit sizing to expand your processing capabilities cost-effectively.
Since 1999, we've partnered with Columbus-area manufacturers to solve complex plastic processing challenges. Our patented technologies and custom-engineered solutions help injection molders overcome Ohio's diverse industrial demands—from automotive components to medical devices—while maximizing efficiency and profitability in today's competitive manufacturing landscape.

Delivering measurable improvements in quality, efficiency, and profitability for manufacturers worldwide.
Experience the difference that innovative engineering and decades of expertise make.
Eight patents including revolutionary Inject-EX™ systems and Mini-Shut™ nozzle tips for Columbus manufacturers.
Never one-size-fits-all solutions—every component is precisely designed for your specific applications and goals.
58% improved consistency, 20% cycle time reduction, and 30% extended maintenance intervals documented.
End-to-end service from initial consultation through manufacturing, testing, tuning, and ongoing technical support.
Led by industry pioneer and patent holder Mike Durina.

Founder
Mike Durina brings unparalleled expertise to Columbus' plastic processing industry with degrees from Ferris State University (AAS Plastic Engineering) and Kent State University (BS Industrial Engineering). His journey began in 1978 working for injection molding firms before joining Spirex in 1984, where he served as VP of Sales & Service for 16 years, growing the company from $1.8 million to $22 million in sales. In 1999, he founded Md Plastics Inc with a vision to advance plasticating technologies. Mike's innovative spirit has earned him eight patents with one pending, including groundbreaking technologies like the Melt Profiler™, Inject-EX™, Mini-Shut™, and MDP™ Performance Valve. His deep understanding of Columbus' manufacturing landscape and commitment to solving complex processing challenges has established Md Plastics as a trusted partner for manufacturers seeking competitive advantages through superior plastic processing solutions.
What makes Posi-Melt™ screws different from standard injection molding screws?
Posi-Melt™ screws are custom-designed for your specific materials, machines, and production goals. We analyze melting points, thermal sensitivity, flow characteristics, and other material properties to create precision segments including feed zones, compression zones, and optional mixing sections with our proprietary XLA mixing elements.
How does the Inject-EX™ system improve upon traditional reciprocating screw technology?
What kind of results can I expect from upgrading my injection molding components?
Do you provide engineering support for custom applications?
Can you modify existing equipment or do I need to buy new machines?
What materials and coatings are available for custom screws?
How do your process control systems like Melt-Profiler™ work?
What is your typical project timeline from design to delivery?
Connect with our engineering team for personalized consultation and solutions.
Revolutionary plasticating and injection molding system
Automatic shutoff nozzle tip technology
Precise control non-return valve system
Get expert consultation and custom engineering solutions tailored to your specific manufacturing needs.
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