Major Components Of A Grinding Granulator Machine

When selecting a grinding granulator, you need to consider some important components that makes the machine to function optimally.

Besides the components of a grinding granulator machine, other important things to consider include the thickness, shape, size, and type of materials to be cut.

Another important consideration is the number of materials to be granulated and the level of regrinding.

Also, the hopper feed needs to be assessed for safety operation. It needs to be sized for receiving a large amount of granulation without intensive labor or precutting danger.

Recently used safety devices in granulators entail electric interlocks, preventing access to the cutting chamber until the rotor's stoppage. Although, the in-built safeguards may not be present in older granulators.

However, for your high-quality granulators that will stand the test of time, you need to consult a reputable and renowned grinding granulator manufacturers.

Major Components of a Grinding Granulator Machine

Here are some of the components of grinding granulator:

1. Cutting Chamber

Typically, we have three cutting chamber designs: conventional and straight-drop, tangential, and a hybrid model.

The straight-drop model is mostly suggested for thick-walled areas. The design strengthens perpendicular material to its cutting circle.

The material is less likely picked by the nibbling bites and also by chance, stall the rotor.

The common tangential model directs feedstock at a tangent along the cutting circle into the low cut circulating knives. There is an offset positioning of the rotor from the feed opening.

The hybrid design sends materials at an angle among the first two and permits customized molders at broad ranges of shape and sizes to process thin and thin-walled material inside a machine.

2. Rotors

There are four common types of the rotor which are; staggered, closed or solid, open, and segmented/staggered.

Staggered rotors exist as semi-closed or closed configuration and are very good for cutting heavy parts with a thick wall.

Close or solid rotors possess compact spaces within the shaft center and rotating knives.

It gives more strength to the knife mounting arrangement and adds inertia to pierce thick feedstocks like big cold purgings.  

Open rotors give an unlimited flow of air through the cutting chamber. Therefore, they are mostly employed for heat-sensitive resin granulation or warm processing feedstocks.

Staggered/segmented rotors are commonly available in a spiral pattern, and they give more cuts than traditionally designed rotors.

There is a constant cutting after sharpening, heat-build-up, screen plug minimizing, and fines.

3. Knives

The knives' arrangement, the number of blades, speed, sharpness, and tip angle all possess an essential impact on granulators and granulate quality efficiency.

The manufacturer may mount the knives on the rotor or a stationary bed. Also, the clearance within bed knives and rotating is important to the reduction of size performance.

The knife sharpening frequency depends on the material abrasiveness and composition of the steel alloy blades. The steel knives are commonly created for either wear resistance or toughness.

By maintaining the knives regularly is a good idea to check the knife sharpness and wear. Also, sharpened blades are essential in producing regrind quality with fines.

4. Screen

The size of holes making up the screen depends on the machine size and material composition.

Therefore, thinner and smaller holes produce the largest uniform particle size when the rotors run at low speed.

However, larger screen holes will be needed to reduce fine and achieve throughput when the speed is increased.

Meanwhile, the range of particle size may be increased, especially with brittle substances.

Also, a type of screen that lasts long and with good performance is a reversible screen.

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