Cleaning and drying,
Compaction
Plast Compactor
Type: PC
The WIPA Plast Compactor of the PC series is used for the gentle compaction of plastics with a low bulk density, for example:
– Fibers
– Films
– Stretch films
– Foams
– Powders
– Dusts
During the process in the WIPA Plast Compactor, the bulk density of the plastic is increased, turning the plastic into an agglomerate that can be easily dosed and has a high bulk density with the lowest possible thermal damage.
WIPA Plast Compactor
The procedure
If the conveyor elements move backwards, the conveyor elements contact each other and slide backwards through the material with little resistance. Very little material is retracted and the WiPa system consumes up to 75% less energy than conventional systems. While conveyor rails 1 and 3 move forwards, rails 2 and 4 move in the opposite direction. This takes place in continuous alternation. Thanks to the modular design of the containers, sizes from 6 to 1000m3 can be produced on the basis of identical or similar parts. The Silos can also be upgraded at a later date with little effort.
Gentle compaction
The thermal effect on the material in the WiPa Plast Compactor is much lower than with conventional agglomerators, which work in a discontinuous process, or extruders, as the material only remains in the WIPA Plast Compactor for a few seconds. The melting point is not reached here, as the material is only brought to a doughy state and determines itself when it leaves the panes.
The agglomerate
During the process, finger-sized agglomerates are produced, which are cut to the desired particle size in a downstream granulator. The size of the agglomerate is defined by a sieve installed in the granulator. To cool down the material and avoid the formation of dust and fines in the end product, the agglomerate is sent through a fines separation and fines return unit before it reaches the Silos or Big Bags.
Agglomeration and drying
The WIPA Plast Compactor is generally used to increase the bulk density of plastics. Nevertheless, it is used in other areas, for example to efficiently dry the material after a washing line. During the process, the material is heated so that moisture evaporates and the material moisture is reduced to approx. 0.1%. In this state, the material is ready for further processing in an extruder or injection molding machine.
Compounding
Additives and fillers such as colorants, plasticizers, etc. can be fed directly to the Plast Compactor’s feed screw via the special dosing units. The material is heated and homogenized in the agglomeration process so that the fillers can be absorbed. This achieves an even distribution of additives and fillers in the plastic, which enables an improved combination of properties in the end product.
Crystallization of pet regrind
The WPA Plast Compactor is ideal for crystallizing PET regrind, for example after a hot wash. The material is heated until it takes on a doughy state. The crystallization of PET begins at a temperature of approx. 120 – 140°C, which the WiPa Plast Compactor reaches quickly and gently. The viscosity value remains almost unchanged, as the melting point is not reached during the process. This enables efficient crystallization of the PET material, which leads to an improved quality of the end product.
The procedure
Type PC 700
All data at a glance
Technical data | PC 500 | PC 600 | PC 700 | PC 850 | |
Main drive kW | 75 – 160 | 110 – 200 | 160 – 315 | 315 – 630 | |
Bulk density | g/l | ||||
Throughput | kg/hour | kg/hour | kg/hour | kg/hour | |
HDPE | 280 – 350 | 480 – 700 | 750 – 1200 | 1150 – 2000 | 1700 – 3000 |
PE film | 200 – 500 | 500 – 800 | 750 – 1150 | 800 – 1600 | 1200 – 2100 |
PE foam | 200 – 500 | 400 – 700 | 700 – 1050 | 750 – 1400 | 1000 – 1650 |
PP fleece | 150 – 300 | 400 – 700 | 700 – 1250 | 750 -1400 | 1050 – 1850 |
PS Foil | 150 – 300 | 300 – 700 | 700 – 1200 | 750 – 1300 | 1100 – 1900 |
EPS | 180 – 300 | 300 – 700 | 700 – 1200 | 750 – 1200 | 1000 – 1600 |
PVC film | 250 – 400 | 300 – 700 | 750 – 1250 | 800 – 1500 | 1150 – 1850 |
PVC foam | 250 – 400 | 300 – 700 | 700 – 1200 | 800 – 1450 | 1000 – 1650 |
PET film | 200 – 300 | 600 – 900 | 750 – 1350 | 800 – 1700 | 1150 – 2150 |
PET fibers | 150 – 300 | 400 – 600 | 750 – 1100 | 850 -1450 | 1200 – 1750 |
PET foam | 100 – 250 | 250 – 600 | 550 – 1000 | 650 – 1100 | 1000 – 1550 |
PET fleece | 200 – 350 | 400 – 700 | 650 – 1250 | 800 – 1750 | 1100 – 2150 |
PET regrind (bottles) | 200 – 400 | 400 – 1000 | 700 – 1300 | 950 – 1800 | 1380 – 2200 |
PA Foil | 150 – 300 | 400 – 900 | 650 – 1250 | 850 – 1650 | 1200 – 2100 |
PA 6 / 6.6 fibers | 150 – 250 | 400 – 900 | 650 – 1050 | 800 – 1250 | 1000 – 1700 |
Carpet waste | 100 – 250 | 350 – 600 | 600 – 1000 | 800 – 1200 | 1000 – 1600 |
Synthetic rubber | 150 – 400 | 250 – 700 | 650 – 1500 | 800 – 1850 | 1100 – 2200 |
Wood-plastics | 150 – 350 | 250 – 600 | 650 – 1350 | 800 – 1650 | 1000 – 1900 |
Throughput rates and technical data are based on experience and may vary depending on the material.
