When finished products are conveyed (often with a large portion of glass fibers) after the extrusion and the granulating process, a big challenge for many plastic compound processors is to keep the wear on pipe bends and piping as low as possible. In this case AZO recommends a low-velocity conveying system for this.
The supply of filling systems for sacks, big bag products, octabins, and indoor and outdoor silos calls for guaranteed reliable and careful feeding. The refined pellet material is generated continuously and elevated pneumatically to buffer silos by a vacuum conveying system. At the same time, samples can be taken for quality testing. The plastic compound is temporarily stored until filled into buffer silos. AZO can also supply these as mixing silos if required. Vacuum conveying systems are especially simple and low-cost solutions. They can be designed for both discontinuous and continuous operation.
If a building already exists, or the current production gets updated, sometimes plastic compound processors are facing the problem of long conveying distances.
Pressure conveying systems are the best solution wherever plastic compounding processes are performed at high throughput rates and long conveying distances have to be bridged. These systems work reliably and can feed several filling systems.
Pellets accumulate continuously at a spiral cooler or vibration screen and are transferred to the pressure conveyor. The pneumatic pressure system then feeds buffer tanks and loading silos.
Filling machines feed the plastic compound from the buffer tanks into sacks, big bags, and octabins. The filling systems can be specifically configured to suit the customer’s requirements.
For highly abrasive plastic compounds, AZO uses an especially gentle conveying method with impulse conveying. This is a very gentle transport method and can be implemented in the form of either a vacuum or pressure conveying system. Impulse conveying systems are preferred to keep the wear down on bends and pipes caused by abrasive products.