How to use plastic granulators correctly?

Time:2021-10-19

Plastic granulator extrusion system includes a screw, barrel, hopper, head, and mold, plastic through the extrusion system and plastic into the uniform melt, and in the process of the pressure established by the screw continuous extrusion head.
1. Screw: is the principle of plastic granulator composed of the main components, it is directly related to the scope of application and production efficiency of the extruding machine, made of high strength corrosion resistant alloy steel.
2. Barrel: generally made of alloy steel with heat resistance, high compressive strength, strong durability and corrosion resistance or lined alloy steel.
3. Hopper: the bottom of the hopper is equipped with a truncation device, in order to adjust and cut off the material flow, the side of the hopper is equipped with a viewing hole and calibration metering device.
4. Die head: die head is made of carbon steel, equipped with a strip forming die.

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Proper use of plastic granulators:
1. Organize operators and maintenance personnel to study the operation manual of plastic granulators carefully, so that relevant personnel knows the working principle, operation steps and precautions of plastic granulator equipment, so as to operate the equipment reasonably and correctly.
2. The whole granulator will undergo a comprehensive inspection and trial before leaving the factory. In order to prevent problems in the process of handling, the following work still needs to be completed:
3. Start each motor and confirm the correct rotation direction of the motor (usually: the belt rotates counterclockwise in the direction of the belt pulley of the reducer, or refer to the random steering mark).
4. Granulator head (die head) can be installed or not installed with filter net (generally assembled in the form of no filter net when leaving the factory). The required mesh filter net can be prepared for boot use.
5. Point by point check whether the electrical circuit meets the requirements and whether it is loose.
6. Use an ohmmeter to measure motor, electric heating part, insulation resistance shall not be less than 0.5 ω.
7.  Add lubricating oil to the middle line of the oil window. The lubricating oil is medium extreme pressure gear oil N220 (VG320 or MO-BI1632 is recommended) or other lubricating oil with similar viscosity. Fill the oil tank of the hydraulic station with intermediate hydraulic oil (68#) to the middle line of the oil window.

8. Turn on the main power supply and adjust the temperature control of each pivot to “Set temperature” to start the heating button.
9 do low-temperature material (temperature below 230℃), can be directly added to the temperature, constant temperature for 5~10 minutes, and then start.
10. Do high-temperature material (temperature higher than 230℃), can be heated to 230℃ below, start the main motor, slowly feeding, such as barrel screw full of material, stop, continue heating to the set temperature, and then boot. (Directly increase the temperature to a temperature higher than 230℃, due to the thermal expansion and contraction of metal materials, may cause the pelletizer screw barrel locked, can not start)
11. Check and tighten barrel flange and die head screws again.
12. Rotate the belt pulley by hand (screw rotation should not be less than 2~3 turns) to confirm the normal operation, and install the belt pulley protection cover.
13. Start auxiliary system: such as lubrication, cooling, etc., start the main motor.
14. Manually add material slowly for about 3~10 minutes from the discharge port, and pay attention to the ammeter and voltmeter. Current should be within rated current, stable, no fluctuation. The voltage should be within the allowable fluctuation range.
15. Perform a comprehensive check on the above items and prepare to start the machine formally after confirmation.
16. The above procedures have usually been completed before the equipment leaves the factory, and you can choose to refer to them when starting up again.

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