Custom Plasticating Screws
Posi-Melt™ screws precisely engineered for your materials and processes, featuring optimized compression ratios and mixing elements for maximum melt quality and consistency.
Transform your Texas manufacturing operations with advanced plasticating systems and process equipment solutions. From custom injection molding components to complete melt delivery systems, we help industrial manufacturers across the Lone Star State optimize production efficiency, reduce downtime, and maximize profitability through innovative engineering and proven expertise.

Comprehensive manufacturing solutions from custom components to complete system engineering for Texas industrial operations.
Posi-Melt™ screws precisely engineered for your materials and processes, featuring optimized compression ratios and mixing elements for maximum melt quality and consistency.
Advanced Inject-EX™ systems with non-reciprocating technology that improves shot consistency, reduces cycle times, and enables precise melt density monitoring.
MDP™ Performance and Posi-Shut™ valves designed to improve shot-to-shot consistency by up to 58% while reducing cycle times and maintenance intervals.
Barrel Blitz Universal and Poly Clear Prime compounds for efficient cleaning of plasticating systems during material changes and routine maintenance.
Expert engineering support to assess material behavior, troubleshoot inefficiencies, and redesign systems for improved performance and productivity.
LSR conversions, vented barrel modifications, and injection unit downsizing/upsizing to expand capabilities without purchasing new equipment.
Texas manufacturers face unique challenges from extreme weather conditions to diverse industrial requirements. Our advanced process equipment solutions combine decades of engineering expertise with cutting-edge technology to deliver measurable improvements in production efficiency, material consistency, and equipment reliability. Every system is custom-engineered to meet your specific operational demands and Texas industrial standards.

Trusted by major manufacturers including Foxconn, TE Connectivity, and Boston Scientific for critical production improvements.
We combine innovative engineering with proven expertise to deliver superior process equipment solutions.
Eight awarded patents including Inject-EX™, Mini-Shut™, and Melt-Profiler™ technologies for superior performance.
Industry-leading expertise since 1999, serving Texas manufacturers with proven solutions and reliable support.
Never one-size-fits-all approach with proprietary design software calculating heat transfer and pressure profiles.
Documented improvements including 58% better consistency, 20% reduced cycle times, and extended equipment life.
Led by industry pioneer and patent holder Mike Durina.

Founder
Mike Durina brings unparalleled expertise to Texas industrial manufacturing 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 across multiple 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 to focus exclusively on advancing plasticating technologies. Mike has been awarded eight patents with one pending, including breakthrough innovations like the Inject-EX™ system and Mini-Shut™ nozzle tip. His deep understanding of the plasticating process and commitment to innovation has made Md Plastics a trusted partner for manufacturers seeking to enhance quality and profitability.
What types of process equipment do you manufacture?
We design and manufacture custom plasticating screws, injection molding systems, non-return valves, high-performance barrels, nozzle tips, and complete melt delivery systems. All components are engineered specifically for your materials and processes.
How long does custom equipment design and manufacturing take?
Do you provide installation and training services?
What materials and applications do your systems handle?
Can you upgrade existing equipment instead of replacing it?
What kind of performance improvements can we expect?
Do you provide ongoing technical support after installation?
What warranty do you provide on custom equipment?
Speak with our application engineers about your specific process requirements.
Inject-EX™ Plasticating and Injection Molding System
Mini-Shut™ Automatic Shutoff Nozzle Tip
MDP™ Performance Non-Return Valve
Contact our engineering team for a comprehensive analysis of your process equipment needs and custom solution development.
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