Plastic Pelletizing Machine

The plastic pelletizing machine is the most important piece of equipment in a plastic pelletizing plant, melting and extruding plastic into long strips for subsequent cooling and cutting into pellets. This article is a detailed introduction of plastic granulator, including applicable raw materials, structure, working principle, heating mode, working video, etc.

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The plastic pelletizing machine is the most important equipment in the plastic granulation line. The dehydrated plastic fragments enter the main machine of the pelletizer for heating and melting, and the melted plastic is extruded and drawn through the die head in the auxiliary machine to achieve granulation.

With a special screw design and different configurations, it is suitable for the production of PP, PE, PS, ABS, PVC, PC, and other plastics for regeneration and color-mixing granulation.

Introduction of Plastic Pelletizing Machine

The Plastic pelletizing machine consists of a main machine and a secondary machine. The main machine of the plastic granules making machine is the extruder, which consists of an extrusion system, transmission system, and heating and cooling system.

1, Extrusion system: The extrusion system includes screws, barrels, hoppers, heads, and mold heads. Plastic is plasticized into a uniform melt through the extrusion system and is continuously extruded by the screw head under the established pressure during this process.

2, Transmission system: The role of the transmission system is to drive the screw and supply the rotational speed required by the screw in the extrusion process, usually consisting of a motor, reducer, bearings, etc.

3, Heating and cooling device: Heating and cooling are necessary conditions for the plastic extrusion process to proceed.

Raw Materials of Plastic Pelletizer Machine

Our plastic pelletizer machine has a wide range of applications and is suitable for strand-pelletizing plastic bags, woven bags, cement bags, raffia grass, industrial films, agricultural films, drip irrigation tape, plastic drums, tubes, electrical appliance shells, and so on.

Structure of the Plastic Pellet Machine

This plastic pellet machine is mainly composed of a feeding port, screw press, reducer, heating device, press chamber, discharge port, mold head, machine body, base, motor, and other parts.

Two-stage tandem exhaust granulation unit is widely used in the recycling and granulation of various types of plastics such as LDPE, HDPE, PVC, PS, and PP.

The specially designed exhaust port can effectively remove the moisture and volatile gas generated during the melting process of the material, and the extruded particles are uniform, beautiful, and transparent, and the production efficiency is high. The main engine adapts to high-speed continuous operation.

Plastic Granules Making Machine Show Video

This video shows our plastic pelletizing machine in detail.

Heating Method of Plastic Pelletizing Recycling Machine

The heating methods of plastic pelletizing machines include electromagnetic heating, ceramic heating, quartz tube heating, and ordinary electric heating. Among them, electromagnetic heating has the best effect.

The plastic pelletizing machine developed by Shuliy Machinery adopts the new technology of a high-frequency electromagnetic heater, which is energy-saving and efficient, accurate temperature control, safe, and reliable.

plastic pelletizer heating method: electromagnetic heating

Electromagnetic heating: The outer wall of the material drum is wound with electromagnetic coils, with high power, internal heating, and an external insulation layer. Preheating time 10-15 minutes, energy saving 30-70% or more, long service life.

Ceramic heating: The outer layer has a decorative steel plate, and the nichrome alloy heating wire is sandwiched between the ceramics, which must be close to the sleeve. The power is 0.5~1.5 times higher than the ordinary one, the preheating time is 30-60 minutes, and the service life is slightly better.

One of the heating methods for plastic granulators: ceramic heating
heating method of plastic pellet machine: ordinary electric heating

The mica heating ring is composed of high-quality nickel-chromium alloy heating wire as the heating element, using natural mica as the insulation layer, and the inner layer is made of galvanized/aluminum plate as the conductive heating layer. Moderate power, internal and external heat dissipation.

Mold Head of Plastic Granules Making Machine

The die heads of the plastic pelletizing machine are hydraulic die heads, electric gear die heads and meshless slagging die heads. The die head, also called the extrusion die head, is the molding part of the plastic pelletizer machine. Its function is to distribute the plastic melt from the barrel of the extruder well in the die head runner so that it can be extruded and molded from the die mouth at a uniform speed. The forming role of the extrusion die head is critical in the total extrusion process.

  • Electric gear die head: An electric gear die head is a common plastic pelletizing machine die head, that is relatively simple and easy to operate and maintain. Suitable for small-scale plastic pellet production, electric gear die heads have lower equipment costs compared to some more complex die heads.
  • Hydraulic die head: Hydraulic die heads can achieve more precise extrusion control and are suitable for large-scale pellet production. The hydraulic system can provide a more stable extrusion process, helping to maintain consistent granule mass.
  • Meshless slagging die head: The meshless slagging die head can effectively remove foreign objects and impurities during the plastic granulation process, improving plastic pellet quality. No need to shut down or change the network, improving production efficiency.

Video: How Does the Plastic Pelletizing Machine Work?

This video shows how a plastic pelletizing machine processes waste plastic into plastic pellets.

Precautions of Plastic Pelletizing Machine

1, It is prohibited to start the plastic pellet machine cold. Pre-heating is required before starting, and the temperature of each zone of the barrel and head should be set to a predetermined value to ensure sufficient material melting time, to ensure that residual materials in the barrel and head melt, as well as internal parts such as screws and splitter plates reach the set temperature.

2, Ensure that the materials added to the mixing feeder do not contain any destructive impurities, especially heavy metals.

3, Wear protective gloves when cleaning the mold opening and changing the stencil.

4, No tools or objects in your hands should be near any rotating parts at any time, and no hands or tools in your hands should be in the hopper of the feeding device at any time when the equipment is running.

How to Maintain Plastic Granules Machine?

  • Clean and lubricate regularly: Clean the external surface, the feed inlet, discharge outlet, and lubricate moving parts.
  • Regular inspection and repairs of plastic pelletizing machine: Checking electrical components, inspecting the transmission system, and maintaining the heating system.
  • Paying attention to safety production: Training operators, and keeping detailed maintenance records.

What Factors Affect the Price of Plastic Pelletizing Machines?

  • Models and specifications: Different models and specifications of the plastic granule machine have different processing capacities and functions, and the price will vary accordingly.
  • Brands and manufacturers: Well-known brands and specialized manufacturers usually provide more reliable equipment and after-sales service, but their prices may be relatively high.
  • Materials and workmanship: The materials and workmanship used in the manufacture of a plastic pelletizer machine will affect its durability and performance. High-quality materials and workmanship usually increase the price.
  • Degree of automation: The plastic granulator with more automation is usually more expensive. Automation features can increase productivity, but they can also increase the cost of the equipment.

Successful Cases of Plastic Granulator

HDPE Pelletizing Machine Applied in Nigeria

Our Nigerian customer bought an HDPE pelletizing machine from Shuliy Machinery, and this machine has been successfully installed and applied.

HDPE Pelletizing Machine feedback in Nigeria
HDPE Pelletizing Machine Feedback in Nigeria

Shuliy Plastics Granulator Running in Mozambique

The plastics granulator shipped to Mozambique is running well and the customer is very happy with our machine, sharing a video of the machine in operation with Shuliy Group.

Choose One Complete Plastic Recycling Line

The PP PE granule extruder is used to melt plastic fragments and extrude them into strips. The plastic pelletizing machine is the core equipment in the plastic granulation line, and Shuliy Machinery can provide our customers with complete plastic recycling production line equipment.

The important equipment of the plastic recycling line includes a plastic crusher, plastic washing tank, plastic pelletizing recycling machine, cooling tank, and pellet cutting machine. We can also provide customized granulation lines according to customer needs.