Mini-Shut™ Shut-Off Nozzle

A Simple Solution For Stringing And Drooling

A common practice for dealing with stringing and drooling is melt decompression. But as scientific molding experts would agree, this is not an ideal way to deal with the problem because it destabilizes the molding process. This, in turn, can cause problems much worse than stringing and drooling.

The Mini-Shut™ Automatic Shutoff Nozzle Tip is a simple, cost-effective solution to drooling and stringing. It shuts off instantaneously as soon as melt flow stops, preventing melt from escaping the end of the nozzle. Its unique design allows for the free flow of material, which results in almost no loss of pressure.


  • Reliable
  • Easy to use
  • Easy to install and remove
  • Economical – see pricing below
  • Fits on virtually all nozzle bodies
  • For use with all machine sizes
  • For use with all polymers
  • On the shelf stock item


  • Eliminate Melt-Decompression
  • Eliminate Drooling
  • Eliminate Stringing
  • Allows for the clamp and screw to be operated simultaneously

Typical Pressure Loss Associated With Mini-Shut™

Mini-Shut™ Shown With 2-Piece Nozzle Body

Mini-Shut™ Stock Items

  • 1/2″ Rear Opening
  • 7/8 – 1/4 thread
  • Any radius
  • Orifices from 1.5mm to 9mm
  • Recommended for shot sizes up to 68oz
  • 8mm Rear Opening
  • M24x1.5 thread
  • Any radius
  • Orifices from 1.5mm to 9mm
  • Recommended for shot sizes up to 68oz
  • 3/4″ Rear Opening
  • 1-1/4-12 thread
  • Any radius
  • Orifices from 3mm to 14.3mm
  • Recommended for shot sizes up to 180oz
  • 1-1/4″ Rear Opening
  • 2-10″ thread
  • Any radius
  • Orifices from 5mm to 20mm
  • Recommended for shot sizes up to 400oz

Custom Solutions Available Upon Request

We’ve partnered with several customers to design and manufacture custom Mini-Shut™ Shut-off nozzles. These include customers who utilize Mini-Shut™ technology in 3D printers and hot sprue bushings. So if you are looking for a simple, cost-effective way to attain instantaneous shut-off, please give us a call. We can help!