
Posi-Melt™ MB Barrier Screws
- 60% increased barrel wall exposure
- Single-channel barrier geometry
- 14-240mm diameter range available






Patented Technology
Made in USA
MD Plastics manufactures custom screws and plasticating systems engineered for injection molding, extrusion, and blow molding. Our patented Posi-Melt™ technology delivers superior melt quality, faster material changeovers, and increased throughput. With custom designs from 14-260mm and proprietary flight geometries, we optimize polymer processing for automotive, medical device, and electronics manufacturers worldwide.
Talk to our experts for custom solutions and tailored guidance.
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What diameter range do MD Plastics custom screws cover?
Our custom screws are available from 14mm to 260mm diameter, with barrier screws, mixing screws, extrusion screws, and plasticating systems engineered for your specific machine.
How does Posi-Melt™ technology improve screw performance?
Can MD Plastics screws retrofit existing injection molding machines?
What materials are compatible with MD Plastics screws?
What construction materials are available for custom screws?
How long does custom screw design and delivery take?
Does MD Plastics offer technical support after purchase?
Talk to our experts for custom solutions and tailored guidance.

Custom barrier and mixing screws engineered for precision plastic components across all polymer types with superior melt quality.

High-performance plasticating screws for injection molded automotive components requiring consistent quality and fast material changeovers.

Precision screws for sterile medical component molding with uniform melt temperature distribution and minimal contamination risk.

Custom extrusion screws optimized for pipe, profile, sheet, and film production with enhanced melt uniformity and throughput.
Talk to our experts for custom solutions and tailored guidance.



Founded in 1999 by industry veteran Mike Durina with 8 patents, we bring decades of plasticating engineering expertise and proven innovation to every custom screw design.
Our proprietary screw geometries increase plastic exposure to barrel walls by 60%, delivering superior melt uniformity, faster changeovers, and reduced scrap rates.
Founder Mike Durina personally designs custom solutions using advanced software for heat transfer and pressure profiling, ensuring optimal performance for your specific application.
Connect with our engineering team for technical consultation and custom screw design. Expect a detailed quote with performance specifications within 48 hours.
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