Comet 3 layer extrusion line
| Machine | Comet 3 layer extrusion line |
| Reference number | E17004 |
| Machine manufacturer | Plastproject re di Luca |
| Model | Comet S674 |
| Type of extruder | Blown |
| Year | 2000 |
| Number of layers | 3 |
| Diameter die | 230 mm |
| Lip opening | 1,2 mm |
| Diameter screw(s) | 60 / 80 / 60 |
| L/D ratio screw(s) | 30D / 29D / 30D |
| Material & Min – Max thickness | Bi-axially oriented shrink films PE, LDPE, LLDPE 13 - 25 micron |
| Max. film width | 1700 mm |
| Max. output | 200 kg/hour |
| Rewind manufacturer | Clarus Films and Slitec |
| Rewind type | Back-to-back Contact & Gap semi automatic |
| Max. rewind reel diameter | 500 mm |
| Number & sizes airshafts for winder | 4 x 3" |
| Type of screen changer | Manual |
| Rotating, which part | Die |
| Dosing unit | No |
| Thickness measurement | Yes, Contrex |
| Inline slitting | Yes |
| Tower construction included | Yes |
| Manuals available | Yes |
| Other information | Machine is auctioned by our partner Dechow Auktionen. Please click here to go the auction: https://www.dechow.de/auction/lot/812/61706 |
Extruders
Extrusion in the flexible packaging industry can roughly be devided in three kinds of extrusion: blown film extrusion lines, cast film extrusion lines and BOPP extrusion lines.
Blown Film Extrusion
Blown film extrusion is the most common technology to produce plastic film. Blown film extrusion is typically carried out upwards vertically.
Film is made out of polymer material. These polymeres are generally in the form of granulate. This material is melted and then forced or extruded through a die. Air is blwon thourgh a hole in the center of the die. This pressure causes a bubble. This bubble is a thin layer of film. The film is pulled upwards from the die to cool down and winded on the a roll.
Blown film extrusion exists in various layers, the more layers the thicker the film. The process with more layers is called coextrusion.
- 3 layer
- Extrusion
- comet
- blown
