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Custom Insert Injection Molding Services for Precision Parts

Achieve superior part quality with MD Plastics' custom insert injection molding solutions. Our engineered plasticating systems deliver precise melt control, reduced variability, and consistent shot-to-shot performance for medical, automotive, and high-precision applications. Partner with industry innovators who combine decades of expertise with patented technologies to optimize your molding process and maximize profitability.

Precision injection molded parts with metal inserts on production line

Our Custom Insert Injection Molding Services

Comprehensive plasticating solutions engineered to deliver superior melt quality, process control, and consistent results for precision insert molding applications.

Posi-Melt™ Custom Screw Design

Never one-size-fits-all, our Posi-Melt™ plasticating screws are precision-engineered for your specific materials, machine, and objectives. Each segment—from feed zone to optional mixing sections—is calculated to optimize melt quality for precision insert molding with tight tolerances.

MDP™ Performance Non-Return Valves

Engineered valves that improve shot-to-shot consistency by up to 58%. Our MDP™ valves ensure precise material control during injection, critical for insert molding where dimensional accuracy and repeatability are paramount for quality assurance.

Melt-IQ™ Process Control Systems

Advanced monitoring systems that reduce variability and ensure repeatable results. Essential for medical-grade polymers, food-contact products, and precision parts requiring tight tolerances. Real-time melt temperature control integrated with our screw designs.

LSR Conversions for Insert Molding

Expand your insert molding capabilities with Liquid Silicone Rubber conversions. Modify existing equipment to process LSR materials for medical devices and precision sealing applications without investing in dedicated LSR machinery.

Application Engineering Support

Our engineers partner with you to assess material behavior, troubleshoot process inefficiencies, and redesign systems for improved insert molding performance. From quick upgrades to ground-up solutions, we deliver results-driven support.

Inject-EX™ Molding Systems

Revolutionary injection molding technology with stationary helical plasticating screw and mechanical check valve-shutoff mechanism. Ensures superior melt quality separation and volumetric mass density control for the most demanding precision insert applications.

Patented Technologies

Engineered Precision for Every Insert Molding Application

At MD Plastics, we understand that precision insert molding demands more than standard equipment—it requires engineered solutions tailored to your exact specifications. Our custom plasticating systems combine proprietary design software that calculates heat transfer, shear rates, and pressure profiles with decades of injection molding expertise. Whether you're processing medical-grade polymers, engineering resins with metal inserts, or high-volume automotive components, our Posi-Melt™ screws and MDP™ valves deliver the melt quality and shot consistency your precision parts demand. We don't just supply components—we partner with you to optimize your entire process for maximum profitability.

Engineer examining precision molded parts with metal inserts
Proven Performance

Trusted by Industry Leaders

Delivering measurable results for medical device manufacturers, automotive suppliers, and precision molders worldwide.

"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 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 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

"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

"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 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 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 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

"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

"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 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 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 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

"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

"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 for Insert Injection Molding?

Partner with the innovators who have been advancing plasticating technology since 1999.

Patented Innovation

Eight patents including Melt Profiler™, Mini-Shut™, and Inject-EX™ technologies that deliver measurable improvements in melt quality and process control.

Custom Engineering

Never one-size-fits-all solutions. Every screw, valve, and system is designed using proprietary software and intensive analysis of your materials, machines, and objectives.

Proven Results

Documented improvements including 58% better shot consistency, 20% reduced cycle times, and 30% extended mold maintenance intervals for precision molding operations.

End-to-End Support

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

Meet the Innovator Behind MD Plastics

Leadership driven by decades of plasticating expertise and a passion for solving complex molding challenges.

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 brings unparalleled technical expertise to plasticating technology. His deep understanding of the plasticating unit's critical role in injection molding has driven him to develop innovative solutions that transform industry standards. Mike has been awarded eight patents with one pending, including groundbreaking technologies like the Melt Profiler™, Inject-EX™, Mini-Shut™, and MDP™ Performance Valve. His commitment to helping injection molders achieve greater profitability through better plasticating components has positioned MD Plastics as a trusted partner to leading manufacturers worldwide, from medical device producers to automotive suppliers.

Frequently Asked Questions

What makes custom insert injection molding different from standard injection molding?

Custom insert injection molding involves placing metal or other components into the mold cavity before injecting plastic, creating a single integrated part. This process requires precise temperature control, consistent shot size, and specialized equipment to ensure proper bonding and dimensional accuracy around the inserts without damaging them.

How does MD Plastics' Posi-Melt™ screw design improve insert molding quality?

What types of materials can be used for precision insert molding?

How do you ensure shot-to-shot consistency for tight-tolerance parts?

Can you upgrade existing equipment for insert molding applications?

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

Do you provide support after installation?

What ROI can I expect from upgrading to MD Plastics plasticating systems?

Ready to Optimize Your Insert Molding Process?

Connect with our application engineers for a detailed analysis of your operation and customized plasticating solution.

Start Your Custom Insert Molding Solution Today

Share your application details and challenges. Our engineering team will analyze your needs and propose a tailored plasticating system to optimize your precision insert molding 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