Nozzles are an indispensable element in the field of injection molding.

They are placed at the end of the plasticizing screw duct in order to allow the material to flow into the inlet channel of the mold.

They can have custom designs and be produced in different steels with different coatings.


Standard nozzle

Customizable according to the customer’s needs, they can be direct or composed of a nozzle body and head.

Mixing Nozzle

A mixing element can be inserted into the body of the nozzle, available in various sizes. This solution is recommended to improve the mixing and homogenization of the material avoiding color streaks.

Filter Nozzle

A filter is inserted inside the nozzle body, available in various sizes. This filter is used to safeguard hot chambers and molds , especially in those cases where recycled polymers often containing impurities are used.

Shut Off nozzle

Shut-off nozzles can operate via mechanical, hydraulic or pneumatic locking mechanisms. They are recommended to ensure a reliable and repetitive process, especially in the case of very liquid polymers.

Brixia plast Multi Compound Screw

Shut Off nozzles

The shut off nozzles have different fields of application, and are particularly suitable for liquid polymers.

They allow to achieve multiple advantages:

  • Accuracy in closing, with the elimination of leaks and burrs. Reduction of cycle times

  • Minimal pressure loss

  • Optimized heat conduction

  • No stress on the melt

Parts are interchangeable in case of wear. It is also possible to supply components coated with PVD technology , for greater wear resistance.

The closure can be mechanical (spring), hydraulic or pneumatic.

The choice of the correct model depends on the maximum injection capacity of the plasticizing group.

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S10 – L10 S20 – L20 S30-L30
Maximum injection capacity 500 cm3 /s 1500 cm3 /s 3500 cm3 /s
Screw diameter < 30 mm 20 – 60 mm > 50 mm
Maximum temperature 400 C°
Max pressure 2500 bars


BRIXIA PLAST can supply standard heads, hydraulic or pneumatic closing heads. Coatings can be added to avoid wear, as well as problems due to stagnation of material or the presence of gas.

Hydraulic head
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