Extrusion
Euroviti is able to provide the complete set of monoscrew extrusion composed by: screws and barrels, feeding zone sleeve plain and grooved, like triangular, trapezoidal or spiral, complete support hopper
To increase resistance against wearing and abrasion, we are able to provide screws and barrels in:
- EUV 41 Nitrided steel
- EUV 79 Hardened steel
- EUV 10 Sintered steel
- EUV 80 Sintered steel
- EUV 90 Sintered steel
Our staff will help you in choose the most suitable steel for your application between sets:
Standard Series
Bimetallic Corrosion Series
Bimetallic Strong Series
Bimetallic Unlimited Series
The experience acquired in this field allows us to offer our customers the study of the screw geometry to improve the plasticizing capacity, to increase the output and to improve the homogenization.
| Manufacture of the screws | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Denomination | C | Si | Mn | P | S | Al | Cr | Mo | Ni | V | W |
| EUV 41 | 0,45 | 0,5 | 0,80 | 0,03 | 0,035 | 0,8 | 1,80 | 0,40 | - | - | - |
| EUV 34 | 0,37 | 0,4 | 0,70 | 0,025 | 0,03 | 1,20 | 1,80 | 0,25 | 1,5 | - | - |
| EUV 79 | 1,60 | 0,40 | 0,45 | 0,03 | 0,03 | n.p. | 12,0 | 0,80 | n.p. | 1,1 | - |
| EUV10 | 2,9 | - | 0,5 | - | - | - | 8 | 1,5 | - | 9,80 | - |
| EUV 80 | 2,30 | 0,60 | 0,30 | - | - | - | 12,50 | 1,10 | - | 4 | - |
| EUV 90 | 1,90 | 0,70 | 0,90 | - | - | - | 0,60 | 20 | 1 | - | 4 |
| Coating on screws | ||
|---|---|---|
| Alloy | Denomination | Hardness |
| Cobalt Base | EUV 12 | 46 - 48 HRC |
| Iron Base | EUV 5 | 58 - 60 HRC |
| Nickel Base | EUV 56 | 52 - 56 HRC |
| Nickel Base | EUV 60 | 58 - 60 HRC |
| Nickel Base ( Tungsten carbide ) | EUVW 850 | 67 - 69 HRC |
| Manufacture of the bimetalic barrels | ||||
|---|---|---|---|---|
| Denomination | Base | Alloy | Hardness | Wear/resistance |
| EUV100 | Fe | Ni.C.B. | 58 - 65 HRC | Wear/resistance |
| EUV400 | Fe/Cr | Ni.Mo.Cu.B. | 64 - 69 HRC | Wear and corrosion resistance |
| EUV200 | Ni/Co | Cr.Mo.B. | 48 - 56 HRC | Corrosion |
| EUV1000W | Ni lega | Cr.Si.B.WC. | 58 - 66 HRC | Excellent wear an corr. resist. |
| EUV 41 ( Nitriding steel ) | Fe | 950 ÷ 1100 HV |
| Screw coatings | |
|---|---|
| Method of coating | Material |
| PVD | Tin – TiCN – CrN |
| HVOF | WC-CO-CR ( Ceramic ) |
| HVOF | WC-Co ( Nitriding steel ) |
| Hard chrome plating | Cr |
