Granulation and reduction of size keeps increasing in significance every day. On the other hand, a granulator is used to cut and reduce the size of plastic fragments into smaller granules that are more manageable. The resultant granules may later be harnessed for other plastic-based objectives or offered in the open market for purchase. It’s in your best interest to pick the best machine when looking for a granulator as it can guarantee effective management of materials costs, facilitate the generation of recycled content, and increase your profits.
Here are some essential considerations in the selection of a granulator for chopping scrap plastics:
The job for which you’re selecting the ideal granulating machine is the first issue you need to understand. Firstly, define the material in relation to the amount of it you need granulated to size and the bulkiness of the scrap parts. It’s necessary that you determine the physical size and shapes of these parts. Next, turn to the material itself. Different polymers don’t always exhibit identical reactions, and the reactions of PVC and glass-reinforced plastic are not the same as those for polypropylene. And if you’re using several feed streams, it helps to work out percentages for them. When you’re handling roughly 95% sprues and runners in addition to the sporadic purgings, it’ll be more effective to have a solution for your sprues and runners while allocating another system for the purge. When it comes to granulation, you won’t encounter a machine that’s flawlessly all in one, and relying on a single solution for all materials may cause operational inefficiency and extra costs in the long run. Having said that, consideration of all essential elements of your application and materials proves important in the selection of the right rotor type, chamber size, and horsepower capacity needed to deliver superior results.
Consideration of Granulator Parts
In the selection of your granulator, the rotor is one of the most essential components to take into account. If dealing with thin walled fragments, pick an open rotor. The open design provides for streamlined flow of materials. The best for large, thick scraps is a closed rotor design, while a staggered rotor, which has more cuts for each revolution, is a hybrid of the other two designs.
You could also take into account the workings between the fly knife and the bed knife as that can impact on horsepower specifications. Offsetting the two knives creates a scissor cut. A granulator may have two bed knives, although some machines may have three or four to enhancing cutting action. Likewise, take chamber size and shape into account as these do impact the size of the chunk the knives can bite each turn.