Hebei PVC polyvinyl chloride pelletizing machine Quotation. Shuangda Rubber and Plastics Machinery Co., Ltd. specializes in a wide range of equipment, including granulation lines for various types of waste plastics, plastic extrusion machines, and rubber extrusion machinery. Our products are backed by guaranteed quality and competitive pricing. Please feel free to call us for more information.

The material is too rigid, the water is too cold or there’s excessive water flow, or the traction is mismatched:

When the material has excessively high rigidity, the water temperature is too low, and the water‑to‑material ratio is too high, the extrudate exiting the die is very soft; however, as soon as it passes through the water bath, it hardens rapidly. Coupled with mismatched traction forces, this leads to strand breakage. This phenomenon frequently occurs with materials such as PBT, PET, PC, AS, and ABS reinforced with fibers—especially those that crystallize very quickly or exhibit very high rigidity—and is particularly pronounced in small‑scale extrusion trials. To address this issue, increasing the water temperature and reducing the water‑to‑material ratio can help ensure that the strands entering the pelletizer retain an appropriate level of softness.

The screen mesh count is too low or the number of screens is insufficient: This issue often occurs when the die head pressure is inadequate, or when there are both external and internal contaminants.

Poor venting: Venting (or vapor release) is inadequate, either due to insufficient natural venting or ineffective vacuum venting. This may result from excessive moisture in the material itself, decomposition of flame retardants or other additives, vacuum blockage, insufficient vacuum, air leaks, or an improperly positioned vacuum seal, among other causes. Consequently, gas or vapor remains trapped within the pellets, leading to hollow particles.

Poor plasticization: If the processing temperature is too low, the material will not be fully plasticized. In mild cases, this results in hollow pellets (small voids); in severe cases, it leads to broken strands.

Excessive use of low-melting-point additives—such as EBS or PETS—combined with insufficient screw shear (for example, in Line 2 producing standard ABS, where too much EBS leads to porosity) results in inadequate material plasticization and the formation of hollow cavities.

Plastic recycling machine It is a general term for machinery used to recycle and regenerate waste plastics—both household and industrial. As plastic pyrolysis technology remains at the experimental research stage, plastic recycling machines primarily refer to equipment for reprocessing waste plastics into pellets, encompassing both preprocessing and pelletizing units.

Plastic Recycling: Traditionally, waste plastics have been disposed of through landfilling and incineration. Landfilling not only requires substantial land use but, if impermeable liners are inadequately designed, leachate can easily contaminate nearby surface waters or infiltrate the soil, posing a long-term and serious threat to the surrounding environment and public health. Direct incineration of waste plastics may release dioxins into the atmosphere, while the bottom ash from combustion concentrates toxic and hazardous substances, necessitating further landfilling or additional detoxification. Therefore, sorting and recycling waste plastics offers significant advantages: different types of plastics can be collected, sorted, and pelletized for use as recycled resins, or subjected to pyrolysis and other technologies to depolymerize them into monomers that can be reused in polymerization, thus achieving circular resource utilization. Recycling and reprocessing waste plastics is both environmentally friendly and resource‑saving, enabling secondary utilization and conserving valuable resources.

Regeneration Basics

Plasticization and regeneration: This process involves heating and melting waste plastics to re‑plasticize them, thereby restoring their original properties for reuse, including applications where the performance requirements are lower than the original specifications. Plasticization and regeneration can be further classified into “simple regeneration” and “composite regeneration.”

To implement a development strategy for efficient and environmentally friendly plastic pelletizing machines, it is first necessary to adopt a resource‑conserving approach, transforming single‑purpose, rudimentary pelletizers into modular, intelligent systems. Recycled‑plastic pelletizing equipment can significantly reduce environmental pollution. As we explore new avenues for advancing pelletizing technology, we must comprehensively consider energy efficiency, environmental protection, and product quality to achieve balanced, coordinated, and sustainable development. Price quotes from plastic pelletizing machine manufacturers.

It is necessary not only to undertake fundamental technological upgrades to plastic pelletizing machines but also to carry out comprehensive, multi‑level energy‑saving renovations, while vigorously promoting technologies that harness renewable energy and industrial waste heat. At the governmental level, it is essential to establish and refine comprehensive evaluation criteria and industry standards for plastic pelletizing equipment, put in place mechanisms for macro‑regulation and market‑based adjustments, and accelerate the modernization and replacement of existing plastic pelletizing technologies.

When operating a plastic pelletizing machine, it is essential to follow the prescribed procedures strictly; only then can its service life be extended. Now, let’s explore this together:

Never use low‑quality recycled material containing metallic contaminants or sand. Do not place any metal objects near the feed inlet that could fall in, as such objects may enter the hopper, accelerating wear on the screw and barrel or causing jamming and damage.

Be sure to observe fire safety precautions; smoking and carrying lighters near the machine are strictly prohibited.

Non‑staff members are not permitted to loiter nearby, nor are they allowed to handle or operate any equipment.

Regularly lubricate the machine’s components to ensure smooth operation.

By implementing these measures, you can significantly reduce malfunctions in plastic pelletizing machines and extend their service life.

The main components of the machine include the drive system, temperature control system, feeding system, and vacuum exhaust system. The functions of each component are as follows:

Drive System: Equipped with either DC or variable-frequency speed control, the system provides stepless adjustment of the screw speed from 0 to 31 r/min or 0 to 43 r/min, enabling the screw to extrude the molten material through the die.

Temperature Control System: Utilizing an automatic temperature controller together with appropriate heating coils, thermocouples, and a temperature‑maintaining device (air‑cooled or oil‑cooled) to indirectly heat the raw material to the required temperature, thereby bringing it into a molten state.

Feeding system: A stepless speed-regulating device or the material’s own weight, combined with the hopper’s sealing plate, continuously and uniformly feeds the material to the extruder screw, enabling metered feeding and continuous extrusion through the die.

Vacuum degassing system: A vacuum pump equipped with a particulate separator draws off water vapor, volatiles, and other gases generated during the melting of materials in the料筒, thereby removing moisture and volatile substances.