| |
| |
| 1 |
Feed hopper for intake up to 3 components from the gravimetric feeder |
| 2 |
Degassing port |
| 3 |
Melt filter |
| 4 |
Gear pump |
| 5 |
Adapter |
|
|
| 6 |
Co-extrusion with combiner to join the base layer and the decorative layer, with die lip and thermal expansion bolt for thickness adjustment |
| 7 |
Triple-roller draw-off and smoothing unit |
|
| Direct extrusion of TPE-O sheet |  |  |
The ZSK can be used to produce decorative sheet for vehicle interiors in a single-stage process. The example shows the production of a multi-layer sheet in TPE-O on two ZSK 70 Mc machines. One ZSK prepares the base layer, and the other the decorative layer.
The product is discharged via melt filters, a gear pump and an adapter to the co-extrusion die in which the layers are brought together and forwarded to a Three-roll stack and calender. The plant data are summarized in the accompanying table. A schematic diagram is shown on the following page.
Machine data
| Screw diameter |
mm
|
70
|
| Number of barrel sections |
|
8
|
| Screw length |
|
32 D
|
Operating data
| Screw speed |
min-1
|
400
|
| Throughput rate |
kg / h
|
up to 700
|
| Melt temperature |
°C
|
230
|
| Melt pressure |
bar
|
up to 100
|
Plant data
| Sheet width |
mm
|
up to 1.700
|
| Sheet thickness (total) |
mm
|
0,5 up to 1,8
|
| Take-off speed |
m/min
|
up to 20
|
|
|
