|
| |
| 1 |
grav. feeder EPDM / EVA / PVA |
| 2 |
grav. feeder filler |
| 3 |
grav. feeder additives |
| 4 |
grav. feeder recycling |
| 5 |
grav. feeder softeners |
|
|
| 6 |
Processing section |
| 7 |
Gearbox |
| 8 |
Main drive unit |
| 9 |
Start-up valve |
| 10 |
Vacuum pump |
|
| The product |  |  |
Highly filled sound insulating compounds are used in the automotive industry to insulate engine and driving noise. The extruded sheets, sometimes covered with fleece, foam or carpet, are shaped into the correct form on presses or by vacuum drawing, and are then cut.
|
The raw materials
|
|
| EPDM rubber |
5-10 % |
| EVA |
10-25 % |
| PVA |
5-30 % |
| PE |
5-10 % |
| Barium sulphate |
60-80 % |
| Chalk |
60-80 % |
| Barite |
60-80 % |
| Talc |
5-20 % |
| Carbon black / Titanium dioxide |
1-5 % |
| Mineral oil / DOP |
1-10 % |
| Slip additive / Antioxidant |
0,5-2 % |
| Bitumen |
2-5 % |
| Recycled material |
20-80 % |
| The production process | | |
The method of producing insulation compounds generally used in the past, with an agglomerated premix of solids being fed into the first extruder barrel, is now increasingly being replaced by the split-feed process. In this proc-ess, as with traditional production, the main polymers / elastomers, plus minor components and a part of the liquids are fed into the first barrel – albeit in separate feed stream and gravimetrically weighed.
The addition of abrasive fillers is effected downstream via a Twin-screw side-feeder into the plastic compound. The advantages of this method lie in the safe handling of the raw materials and the associated improvement in product quality, with significantly lower costs for abrasion.
|
Throughput *
|
|
| ZSK 43Mv |
250-450 kg/h |
| ZSK 54 Mv |
500-850 kg/h |
| ZSK 62Mv |
850-1.300 kg/h |
| ZSK 76 Mv |
1.300-2.000 kg/h |
| ZSK 98 Mv |
2.400-4.000 kg/h |
| ZSK 125 Mv |
5.000-10.000 kg/h |
* depending on the raw materials and the recipes
|
