Mini-Shut™ Automatic Shut-Off Nozzle
Posi-Shut™ Automatic Shut-Off Valve
US Patent Technology certified

US Patent Technology

Made in USA certified

Made in USA

Positive Shut Off Nozzle for Industrial Machinery

Positive shut-off nozzles for industrial machinery eliminate drooling and stringing in injection molding operations. Our patented automatic shut-off technology provides instant, precise closure when melt flow stops, ensuring shot-to-shot consistency and reducing scrap rates. Compatible with all machine sizes and polymers, these shut-off valves improve cycle times, maintain optimal injection conditions, and work seamlessly with thermoplastics, LSR, and structural foam applications.

Our Range of Products

Mini-Shut™ Automatic Shut-Off Nozzle

Mini-Shut™ Automatic Shut-Off Nozzle

  • Instant automatic shutoff technology
  • Universal nozzle body compatibility
  • Minimal pressure loss design
Posi-Shut™ Automatic Shut-Off Valve

Posi-Shut™ Automatic Shut-Off Valve

  • Replaceable Mini-Shut™ cartridge
  • Heat-treated H13 tool steel
  • Independent screw operation

Frequently Asked Questions

What is a positive shut-off nozzle?

A positive shut-off nozzle is an automatic valve that instantly stops material flow in injection molding when melt stops, eliminating drooling and stringing to ensure consistent part quality.

What is a shut-off nozzle?

How does the Mini-Shut™ automatic shutoff technology work?

What machine sizes are compatible with these shut-off nozzles?

Can shut-off nozzles be used with LSR and structural foam molding?

How do shut-off nozzles reduce scrap and improve part quality?

What materials are the shut-off nozzles made from?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Automotive Manufacturing

Automotive Manufacturing

Precise shutoff control for injection molded plastic components ensuring consistent part quality in high-volume production.

Medical Device Manufacturing

Medical Device Manufacturing

Sterile precision molding for medical components requiring shot-to-shot consistency and zero contamination from drooling.

Consumer Electronics

Consumer Electronics

High-quality plastic housing production with automatic shutoff preventing defects and maintaining tight tolerances.

Industrial Plastics Processing

Industrial Plastics Processing

Efficient processing of thermoplastics and difficult resins with minimal downtime and improved productivity.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why Injection Molders Choose Md Plastics Inc

Patented Shutoff Technology

Our proprietary Mini-Shut™ technology delivers instantaneous, precise shutoff, eliminating drooling and stringing while ensuring consistent part quality across every shot.

25+ Years of Innovation

Founded in 1999, we bring decades of plasticating expertise with 8+ awarded patents, providing forward-thinking solutions that improve profitability and efficiency.

Universal Compatibility

Our shut-off nozzles fit virtually all machine sizes from small to 400+ oz capacity and work with all polymers, thermoplastics, LSR, and difficult-to-process resins.

Get Expert Guidance on Positive Shut-Off Nozzle Solutions

Request a quote and our technical team will respond within 24 hours with custom recommendations tailored to your machine configuration and processing requirements.

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