The soft PVC pelletizing machine specializes in processing soft polyvinyl chloride (PVC) materials, recycling and converting them into reusable soft PVC pellets. Its workflow comprises multiple critical stages:

1. Raw Material Pretreatment
Collected waste soft PVC products — such as PVC films, flexible pipes, and plastic toys — undergo classification and initial cleaning to remove visible contaminants (e.g., metal fragments, wood, stones). The materials are then shredded into small flakes or fragments using a crusher, optimizing efficiency for subsequent processing.

2. Feeding & Conveyance
Pre-treated materials are precisely fed into the main hopper via automated feeding systems like screw conveyors or vibratory feeders. These systems ensure stable feeding rates, maintaining production continuity and consistency.

3. Heating & Melting
The machine’s barrel is equipped with electric heating bands or electromagnetic heating devices. Temperature is precisely controlled between 160–200°C to accommodate soft PVC’s lower melting point (due to high plasticizer content). Simultaneously, high-speed rotating screws generate intense shear forces, accelerating material melting and ensuring homogeneous molten PVC.

4. Extrusion & Filtration
The molten PVC is propelled forward by the screw’s three-stage structure (feeding, compression, homogenization), which compacts, fully melts, and homogenizes the material. Advanced models integrate filter screens or screen changers to remove impurities (unmelted particles, sediment) and guarantee extrudate purity.

5. Pelletizing & Forming
Extruded strands enter the soft PVC hot-cutting pelletizing machine phase. Two primary methods are employed:

• Water-ring cutting: Strands are cut into pellets in a cooling water bath, followed by centrifugal drying.

• Air-cooled die-face cutting: Direct cutting at the die surface prevents particle adhesion, ideal for temperature-sensitive soft PVC.

6. Cooling & Collection
Final soft PVC pellets undergo air-conveying or screening to remove residual dust, then are stored in silos or automatically packaged.

Equipment Features

1.High-efficiency and Energy-saving Design

Utilizing advanced electromagnetic heating technology, it can achieve an energy saving of 30% – 50% compared with traditional resistance heating, significantly reducing energy consumption costs. The optimized screw length-diameter ratio further enhances the melting efficiency. Depending on the machine type, the production capacity can flexibly range from 50 to 1,000 kg/h.

2.High Adaptability

Specifically designed for the characteristics of Soft PVC materials, it can also be compatible with some other thermoplastic plastics. By conveniently replacing the screw and die head, it can easily switch between processing different types of soft plastic raw materials, meeting diverse production requirements.

3.Automated and Precise Control

Equipped with a PLC intelligent control system, it can monitor key parameters such as temperature, pressure, and rotation speed in real time with high precision. It supports remote operation and fault warning functions. The frequency conversion motor drives the screw, allowing for precise adjustment of the extrusion speed according to the characteristics of raw materials and production requirements. This effectively prevents the degradation of raw materials due to excessive temperature, ensuring stable product quality.

4.Environmentally Friendly Concept Throughout

The barrel is made of stainless steel or corrosion-resistant alloy materials to reduce raw material contamination from the source. Standardized exhaust gas collection devices can be connected to industrial vacuum cleaners or activated carbon adsorption systems, effectively handling the exhaust gas generated during the production process. The water circulation system of the water-ring granulation has a recycling function, greatly reducing water resource consumption and conforming to green production standards.

5.Excellent Stability and Reliability

The screw and barrel are nitrided or coated with double-alloy wear-resistant materials, providing strong corrosion resistance and wear resistance. The normal service life can reach 5 – 8 years. The gearbox uses a hard tooth surface reducer, with an operating noise of less than 75dB and high transmission efficiency, ensuring long-term stable operation of the equipment.

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