Screws, Twin-Screws and High Quality Cylinders

Extrusion screws, injection and twin screw from Ø 20 to Ø 300 for a maximum of 7200 mm in a single piece in various metals including hardened steels, all-hardened material, aluminum and ERGAL; all with related certificates.
Extrusion screws, injection and twin-screw Ø20 to Ø 300 for a maximum of 7200 mm. Involving mixers.
Screws with mixers and maillefer.
Involving mixers.
High production screw.
Mixers and pineapple mixers.

Screws for various uses in the required materials.

Barrels from Ø 20 to Ø 250 for extrusion and injection presses, bimetallic barrels and twin-screw barrels, carried out on customer’s sample or on a constructive design.
Twin-screws in nitrided and armored material.
Detail of twin-screws in nitrided stell and armored material.
TYPE OF REPORT METHOD HARDNESS HRC
Stellite gr.12
Plasma and Tig
45 - 49
Do 06
Plasma and Tig
58 - 62
Colmonoy
Plasma and Tig
52 - 56

REVISION OF SCREWS AND BARRELS

We carry over the screws using special materials such as stellite, tig 5 and colmonoy 46/47 which have different hardness characteristics. But we can use additional materials on specific customer request.

The revision of the barrels consists in the adjustment of the same and subsequent nitriding.

TYPE OF REPORT METHOD HARDNESS HRC

SCREWS

  •  New production
  • Retreading with stellit report
  • Profiles modification
  • Nitrided steel
  • Special steel
  • Vacuum tempering

BARRELS

  • Nitrided steel
  • Bimetallic
  • Smoothed and nitrided


VARIOUS

  • Special accessories for forced feeding units made in non wear out special material
  • Plasticization units for working of thermoplastic materials with or without reducer
  • Review and new production for double-screws units

PRODUCTION

  • Rolls with single screw from Ø 20 mm. up to Ø 250 mm.
  • Nitrided steel extrusion and injection screws from Ø 20 mm up to Ø 250 mm.
  • Stellited extrusion screws

RETREADING

  • Nitrided rolls, by means of the internal grinding and subsequent nitriding
  • Stelliting of either used screws, by grinding a nominal diameter, or adapted to the diameter of the retreated roll
TECNOVITI S.r.l.

Registered office: Via Cesare Magnani Ricotti, 2 – 28100 Novara – Italia
Establishment: Via Tarantelli, 8 – 20020 Bienate di Magnago (Mi) – Italia
Tel. +39 0331 306935 – 0331 306936 – Fax +39 0331 306946
e-mail: info@tecnovitiextrusion.com
Share Capital Euro 10.400,00 i.v. (Fully Paid) – P.I. 01371660034 
C.F. 08078440156 Register of Companies in Novara n.08078440156 – REA n.168653

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