Google Icon

Expert Custom Plastic Injection Molding & Precision Engineering

Transform your manufacturing operations with custom-engineered plasticating solutions designed for precision, efficiency, and profitability. MD Plastics Inc delivers innovative injection molding technologies backed by 25+ years of expertise, patented systems, and a commitment to solving your toughest material processing challenges. From custom screw designs to complete melt delivery systems, we engineer solutions that reduce scrap, extend equipment life, and maximize throughput.

Precision-engineered custom plastic injection molding screw and barrel system

Our Custom Plastic Injection Molding Services

Complete plasticating solutions from custom screw design to advanced melt delivery systems engineered for your specific materials and processes.

Posi-Melt™ Plasticating Screws

Custom-engineered screws precisely designed for your materials, machines, and goals. Every segment optimized for superior melt quality with integrated XLA mixing elements and barrier flights for maximum performance and consistency.

Custom Extrusion Screw Design

End-to-end screw engineering including intensive process analysis, drag flow and shear rate calculations, math modeling, and proprietary surface treatments. Designed to resist abrasive, corrosive, and adhesive wear for extended service life.

Inject-EX™ Molding Systems

Revolutionary injection molding technology featuring non-reciprocating helical plasticating screws and mechanical check valve systems. Delivers superior melt quality with real-time mass density monitoring capabilities unavailable in traditional designs.

Melt-Profiler™ Temperature Systems

Proprietary inline melt temperature measurement technology that calculates quality metrics in real-time. Essential for medical-grade polymers, food-contact products, and precision parts requiring tight process control and documentation.

LSR & Vented Barrel Conversions

Equipment modification services to expand your capabilities. Convert existing machines for Liquid Silicone Rubber processing or add venting for moisture-sensitive materials without investing in dedicated new equipment.

Application Engineering Support

Partner with experienced engineers who assess material behavior, troubleshoot inefficiencies, and redesign systems for improved performance. From quick upgrades to ground-up solutions tailored to your operation.

Precision Meets Innovation

Engineered Solutions That Drive Manufacturing Profitability

MD Plastics Inc doesn't offer one-size-fits-all solutions. We carefully analyze your operations, machines, materials, and objectives to deliver custom-engineered plasticating systems that improve melt quality, reduce cycle times, and extend equipment life. Our patented technologies—including Posi-Melt™ screws, Melt-Profiler™ systems, and Mini-Shut™ nozzle tips—combine decades of expertise with cutting-edge design tools to solve your toughest material processing challenges and maximize your bottom line.

Advanced injection molding equipment with precision plasticating components
Proven Performance

Trusted by Industry Leaders

Manufacturing excellence delivered for medical device manufacturers, automotive suppliers, and global electronics leaders.

"We purchased their complete plasticating system package - screw, barrel, non-return valve, and nozzle. The components work together seamlessly and have transformed our processing capabilities. MD Plastics' systems engineering approach ensures optimal compatibility between components. Setup and commissioning support was excellent. Highly recommended."

Christopher Davis

"The analytical consultation process MD Plastics provided was worth the investment. They used their Melt-IQ system to diagnose issues we couldn't identify with standard process monitoring. The recommendations they made improved our process capability index substantially. Their scientific approach to troubleshooting is impressive and effective."

Kevin Barnes

"We ordered custom feed screws for our compounding extruders. MD Plastics' design improved our mixing efficiency and reduced residence time variability. Output consistency is much better, and we're hitting target specifications more reliably. The engineering team was collaborative throughout the design process. Very pleased with the results."

Nicole Stevens

"The screw and barrel set we ordered for processing medical-grade silicone has performed exceptionally. The surface finish and material selection are perfect for our stringent requirements. MD Plastics understood our regulatory needs and provided complete material certifications. Process validation went smoothly. Reliable partner for critical applications."

Dr. William Chen

"MD Plastics' screw and barrel retrofit on our 20-year-old machine gave it new life. The improvement in shot-to-shot consistency and overall performance is remarkable. We were considering replacing the entire machine, but their solution was far more cost-effective and delivered excellent results. Smart investment that extended our equipment life."

Daniel Foster

"We purchased their complete plasticating system package - screw, barrel, non-return valve, and nozzle. The components work together seamlessly and have transformed our processing capabilities. MD Plastics' systems engineering approach ensures optimal compatibility between components. Setup and commissioning support was excellent. Highly recommended."

Christopher Davis

"The analytical consultation process MD Plastics provided was worth the investment. They used their Melt-IQ system to diagnose issues we couldn't identify with standard process monitoring. The recommendations they made improved our process capability index substantially. Their scientific approach to troubleshooting is impressive and effective."

Kevin Barnes

"We ordered custom feed screws for our compounding extruders. MD Plastics' design improved our mixing efficiency and reduced residence time variability. Output consistency is much better, and we're hitting target specifications more reliably. The engineering team was collaborative throughout the design process. Very pleased with the results."

Nicole Stevens

"The screw and barrel set we ordered for processing medical-grade silicone has performed exceptionally. The surface finish and material selection are perfect for our stringent requirements. MD Plastics understood our regulatory needs and provided complete material certifications. Process validation went smoothly. Reliable partner for critical applications."

Dr. William Chen

"MD Plastics' screw and barrel retrofit on our 20-year-old machine gave it new life. The improvement in shot-to-shot consistency and overall performance is remarkable. We were considering replacing the entire machine, but their solution was far more cost-effective and delivered excellent results. Smart investment that extended our equipment life."

Daniel Foster

"We purchased their complete plasticating system package - screw, barrel, non-return valve, and nozzle. The components work together seamlessly and have transformed our processing capabilities. MD Plastics' systems engineering approach ensures optimal compatibility between components. Setup and commissioning support was excellent. Highly recommended."

Christopher Davis

"The analytical consultation process MD Plastics provided was worth the investment. They used their Melt-IQ system to diagnose issues we couldn't identify with standard process monitoring. The recommendations they made improved our process capability index substantially. Their scientific approach to troubleshooting is impressive and effective."

Kevin Barnes

"We ordered custom feed screws for our compounding extruders. MD Plastics' design improved our mixing efficiency and reduced residence time variability. Output consistency is much better, and we're hitting target specifications more reliably. The engineering team was collaborative throughout the design process. Very pleased with the results."

Nicole Stevens

"The screw and barrel set we ordered for processing medical-grade silicone has performed exceptionally. The surface finish and material selection are perfect for our stringent requirements. MD Plastics understood our regulatory needs and provided complete material certifications. Process validation went smoothly. Reliable partner for critical applications."

Dr. William Chen

"MD Plastics' screw and barrel retrofit on our 20-year-old machine gave it new life. The improvement in shot-to-shot consistency and overall performance is remarkable. We were considering replacing the entire machine, but their solution was far more cost-effective and delivered excellent results. Smart investment that extended our equipment life."

Daniel Foster
The MD Plastics Difference

Why Choose MD Plastics Inc?

Over 25 years of innovation delivering measurable results for injection molders worldwide.

Patented Technologies

Eight awarded patents including Inject-EX™, Mini-Shut™, and Melt-Profiler™ systems that solve real manufacturing challenges.

Custom Engineering

Never one-size-fits-all. Every solution is precisely calculated and designed for your specific materials, machines, and objectives.

Proven Results

Documented 58% improvement in shot consistency, 20% cycle time reduction, and 30% extended maintenance intervals for clients.

End-to-End Support

From initial consultation and design through manufacturing, testing, tuning, and follow-up—we partner with you at every stage.

Meet the Visionary Behind the Innovation

Leadership driven by engineering excellence and industry expertise.

Mike Durina, Founder of MD Plastics Inc

Mike Durina

Founder

Mike Durina founded MD Plastics Inc in 1999 after a distinguished 16-year career at Spirex, where as VP of Sales & Service he grew the company from $1.8 million and 18 employees to $22 million and 180 employees. With an AAS in Plastic Engineering from Ferris State University and a BS in Industrial Engineering from Kent State University, Mike has dedicated his career to advancing plasticating technologies. His deep understanding of the critical role the plasticating unit plays in injection molding led him to establish MD Plastics Inc, where he continues to drive innovation. Mike has been awarded eight patents with one pending, including revolutionary technologies like the Inject-EX™ molding system, Mini-Shut™ automatic shutoff nozzle, and the Melt-Profiler™ temperature measurement system. His vision of 'Inventing Better' guides the company's commitment to helping injection molders achieve greater profitability through superior engineering.

Frequently Asked Questions

What makes custom plasticating screws better than standard designs?

Custom-engineered screws are precisely calculated for your specific materials, machines, and process objectives. Unlike generic designs, they account for material melting points, thermal sensitivity, shear characteristics, and flow properties. This results in superior melt quality, reduced viscosity variation, lower scrap rates, and extended equipment life. Our Posi-Melt™ screws integrate advanced features like XLA mixing elements and optimized compression ratios that standard screws cannot provide.

How does the Inject-EX™ system improve upon traditional injection molding?

What is the typical lead time for custom screw design and manufacturing?

Can you retrofit existing injection molding equipment?

What materials and applications do your solutions support?

How does the Melt-Profiler™ system improve quality control?

What kind of performance improvements can I expect?

Do you provide ongoing support after installation?

Have Specific Questions About Your Application?

Our engineering team is ready to discuss your material processing challenges and recommend custom solutions.

Innovation & Patents

Awards and Recognition

Patent certification for Inject-EX molding system

Inject-EX™ Molding System Patent

Revolutionary plasticating and injection technology (Patent 12151416)

Patent certification for Mini-Shut nozzle tip

Mini-Shut™ Nozzle Technology Patent

Automatic shutoff innovation eliminating drool (Patent 8734146)

Patent certification for Posi-Melt plasticating screw

Posi-Melt™ Screw Design Patent

Efficient melting and mixing technology (Patent 6752528)

Ready to Improve Your Manufacturing Performance?

Tell us about your material processing challenges and let our engineering team recommend custom solutions designed specifically for your operation.

Contact Us Today

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