High-Configuration 180-Type PP Pelletizing Machine | Two-Stage Fully Automatic Waste Polypropylene Plastic Recycling Equipment

In the PP plastic recycling and processing industry, reliable professional equipment is essential to achieve high yield, low energy consumption and high-quality pellets. The 180-type PP pelletizing machine is a two-stage main model suitable for small and medium-sized scaled recycling plants, specially optimized and designed according to the characteristics of polypropylene materials. Ordinary PP pelletizing equipment on the market generally suffers from uneven plasticization, production line breakage during screen replacement, material adhesion due to moisture, and easy wear and carbon deposition of screws, resulting in poor-quality finished pellets, limited production capacity and high operation and maintenance costs. This high-end 180-type PP pelletizing machine is equipped with full sets of industrial-grade high-grade accessories, adopts a master-slave two-stage extrusion structure, and is matched with frequency conversion forced feeding, dual-group constant temperature heating, hydraulic non-stop screen replacement, and integrated water shaking and drying back-end configuration. It realizes fully automatic closed-loop pelletizing production for waste PP materials, perfectly meeting the recycling and processing needs of various PP leftover materials and waste products.

The complete 180-type PP pelletizing machine features five core advantages: two-stage fine plasticization, non-stop stable production, wear resistance and durability, thorough water removal, and high pellet purity. Different from ordinary single-stage pelletizing equipment, the two-stage extrusion process thoroughly solves the industry pain points of insufficient melting of PP materials, incomplete impurity filtration and loose pellets. The core screw and barrel are processed with high-frequency quenching strengthening technology, and the feed inlet is added with wear-resistant alloy layer, which is specially designed to cope with sediment and dust impurities mixed in recycled PP materials, ensuring no easy wear or carbon deposition under long-term heavy-load production. Meanwhile, it is equipped with a dual temperature control system of electromagnetic heating + heating rings, which accurately matches the melting temperature range of PP plastics, avoiding material scorching and raw material residue. Matched with a full-automatic frequency conversion control system, the whole line runs stably with lower energy consumption, producing regular and transparent finished pellets and greatly improving the market premium of products.

The equipment boasts strong compatibility and can widely process waste PP woven bags, PP plastic buckets, PP lunch boxes, injection molding leftover materials, extrusion waste materials, polypropylene films and other materials. The produced high-quality recycled PP pellets can be directly used for secondary production such as injection molding, modification, wire drawing and blow molding, suitable for mass production of small and medium-sized plastic recycling plants, plastic product enterprises and environmental protection recycling processing plants.

1. Detailed Parameters, Accessory Functions and Core Values of the Complete PP Pelletizing Machine
2. 600×600 Forced Frequency Conversion Feeder (15KW Motor)

Adopting a large-diameter feeding structure, it is suitable for various blocky, flaky and bagged recycled PP materials, eliminating bridging, blocking and feeding stalling problems. The 15KW high-power frequency conversion motor intelligently adjusts the feeding amount according to the host extrusion speed to realize uniform forced feeding, keeping the host extrusion pressure stable at all times. It ensures uniform plasticization of PP materials from the source, effectively improves production continuity and overall capacity, and avoids broken strips and defective products caused by uneven feeding.

2. 180-Type Main Pelletizing Machine Assembly

Equipped with a 315-type hard-tooth low-noise reducer, it features high transmission torque, strong bearing capacity, silent operation without noise, supporting 24-hour continuous heavy-load mass production with low risk of wear and tooth breakage, adapting to the high-frequency processing working conditions of PP materials. It is configured with a 180×3000mm screw made of 40CR steel with high-frequency quenching treatment, which has high hardness, sufficient toughness, excellent wear resistance and carbon deposition resistance, perfectly fitting the melting characteristics of PP polypropylene. The feed inlet is reinforced with a wear-resistant alloy layer to resist friction loss caused by impurities, greatly extending the service life of core accessories. The matched 232×3000mm barrel is made of 45# steel with high-frequency strengthening treatment, featuring high temperature resistance, high pressure resistance and smooth inner wall without material adhesion, preventing residual PP materials from scorching and sticking to the barrel wall. Powered by a 75KW special main motor, it has sufficient power reserve and stable extrusion pressure. The heating system adopts a combined mode of 1 set of 80KW electromagnetic heating + 2 sets of heating rings. Electromagnetic heating enables rapid temperature rise and high energy efficiency, while the dual-group heating rings realize zoned precise temperature compensation with uniform overall temperature, accurately matching the PP plastic melting process and completely solving the problems of local overheating carbonization and low-temperature insufficient plasticization.

3. 165-Type Auxiliary Machine Assembly

Fitted with a 225-type Changzhou-made hard-tooth low-noise reducer, it delivers high transmission accuracy, stable operation and low failure rate. It is equipped with a 165×1500mm 40CR high-frequency screw and a 219×1500mm 45# steel barrel, which performs secondary fine plasticization, mixing and extrusion on the initially melted PP materials from the host. It makes material melting more thorough and texture denser, effectively improving the compactness and transparency of pellets. Equipped with a 350 large-diameter screen left-right hydraulic non-stop screen changing head and a 4KW pump motor providing stable hydraulic power, it realizes alternating screen replacement without shutdown and strip breakage, greatly reducing shutdown loss and waste generation and maximizing production continuity. The large-size screen provides sufficient filtration area to thoroughly filter dust, impurities and scorched materials in PP materials, significantly improving the purity of recycled pellets. Driven by a 30KW special motor, it achieves precise linkage with the host with reasonable two-stage extrusion ratio and high production efficiency.

4. 350-Type Stainless Steel Cooling Water Tank (4000×350×260mm)

Made of full stainless steel, it is rust-proof, corrosion-resistant, easy to clean and not easy to scale. The 4-meter extended water tank enables uniform and sufficient water cooling and shaping for the two-stage extruded PP plastic strips, rapidly cooling and hardening the high-temperature softened PP strips to keep them flat and regular without adhesion or deformation. It provides high-quality blanks for subsequent precise pelletizing, avoiding problems such as uneven pellet length, adhesion and agglomeration, and high defective rate.

5. 2500×300 Type 201 Stainless Steel Water Shaking and Strip Blowing Machine

Adopting 201 stainless steel material, it is rust-proof and durable, suitable for humid material working conditions. Equipped with a 1.1KW strip shaking motor and a 1.5KW blower motor for dual collaborative operation, it can thoroughly shake off and blow away residual moisture on the surface of PP plastic strips, solving the pain point of easy water absorption and post-cooling moisture of PP materials. It effectively prevents finished pellets from moisture adhesion and mildew, ensuring dry and clean finished pellets.

6. 180-Type Matching Pellet Cutter (220-Type Alloy Roller Cutter, 3KW Frequency Conversion Motor)

The high-hardness alloy roller cutter is wear-resistant, impact-resistant and sharp in cutting, adapting to the toughness characteristics of PP materials. It delivers flat cuts without burrs or broken materials. The 3KW frequency conversion speed-regulating motor allows free adjustment of pelletizing speed and flexible adjustment of pellet length according to production needs, producing finished pellets with uniform size and consistent appearance that meet high-end market standards.

7. 1-Ton Stainless Steel Storage Bin (3KW Fan Motor)

Made of 201 stainless steel, it is closed and dust-proof, rust-proof and easy to clean. The 3KW high-power fan provides continuous air supply for dust removal, air drying and heat dissipation, further removing floating dust and residual moisture on the surface of finished PP pellets, preventing pellet moisture agglomeration and dust deterioration. It ensures dry and clean finished products, facilitating batch warehousing, packaging, transportation and sales.

8. National Standard Frequency Conversion Distribution Box

Adopting full sets of high-quality national standard electrical components, it supports dual frequency conversion linkage speed regulation of main and auxiliary machines, with multiple safety protections including overload, short circuit and phase loss. It features regular wiring, stable operation and low failure rate. The whole machine supports one-click linkage start and stop with simple and intuitive operation, easy for new workers to master quickly, suitable for long-term industrial continuous mass production.

1. Core Characteristics of PP Pelletizing Machine
2. Two-Stage Fine Plasticization Process

Adopting host primary refining + auxiliary machine fine refining two-stage processing, PP materials are thoroughly melted and evenly mixed, producing compact and transparent pellets without raw materials or looseness, with finished product quality far exceeding that of single-stage equipment.

2. Non-Stop Hydraulic Screen Replacement

The left-right alternating screen replacement design requires no shutdown or strip breakage, ensuring strong production continuity and significantly improving the effective operating rate. It completely solves the problems of large screen replacement loss and production capacity interruption of traditional equipment.

3. High-Configuration Wear-Resistant Core Components

The screws and barrels of main and auxiliary machines are all strengthened by high-frequency quenching, and the feed inlet is reinforced with wear-resistant alloy, featuring impurity resistance, wear resistance and carbon deposition resistance, suitable for the production of complex dirty and miscellaneous PP recycled materials.

4. Dual-Mode Precise Temperature Control

80KW electromagnetic heating + dual-group heating ring zoned temperature control realizes rapid temperature rise and uniform temperature control with energy saving and power saving, accurately matching the PP melting range and eliminating defects such as material scorching and poor plasticization.

5. Complete Water Removal Process

The special integrated water shaking and strip blowing machine thoroughly removes moisture from plastic strips, solving the core pain point of PP material moisture adhesion. The dryness of finished pellets meets the standard, ensuring no deterioration during storage.

6. Full-Frequency Intelligent Linkage

The whole process of feeding, extrusion, water removal and pelletizing adopts frequency conversion speed regulation with accurate ratio and stable operation. A single worker can supervise mass production, reducing labor costs and production threshold.

III. Equipment Working Process

Pre-cleaned waste PP materials are uniformly fed into the feed inlet of the 180-type PP pelletizing machine host by the 600×600 frequency conversion forced feeder → dual-group constant temperature melting and plasticization via electromagnetic heating + heating rings → primary extrusion and conveying by the host → secondary fine plasticization and purification by the 165-type auxiliary machine → non-stop screen replacement and impurity filtration via hydraulic head → uniform extrusion of PP plastic strips → water cooling and shaping via 4-meter extended stainless steel water tank → thorough water removal and air drying via stainless steel water shaking and strip blowing machine → precise pelletizing and forming via 180-type frequency conversion alloy pellet cutter → air drying, dust removal and discharging via 1-ton stainless steel storage bin. The whole process realizes fully automatic closed-loop operation with coherent procedures and stable production.

1. Application Fields

The PP pelletizing machine is widely used in various PP plastic recycling scenarios, capable of processing waste PP woven bags, PP turnover boxes, plastic buckets, lunch boxes, films, injection molding and extrusion leftover materials and other PP waste materials. The produced high-quality recycled PP pellets are applicable to secondary processing such as plastic injection molding, product modification, wire drawing and rope making, and blow molding, suitable for scaled mass production of small and medium-sized recycling plants, plastic product factories and environmental protection recycling enterprises.

1. Common FAQ

PP pelletizing machineQ1: Is the 180-type  specially adapted for polypropylene materials? What is the effect of processing mixed PP materials?

A: The 180-type PP pelletizing machine is customized and optimized for the characteristics of PP polypropylene materials, with two-stage plasticization and precise temperature control fully adapted to PP melting and cooling processes. For waste PP mixed materials with sediment and slight oil stains, it can effectively purify and remove impurities relying on the high-frequency wear-resistant screw and large-diameter precision filtration system. With simple pre-treatment, it can produce high-quality recycled pellets, suitable for various PP recycled material production.

Q2: Will pellet adhesion occur during wet production? Is the water removal effect up to standard?

A: No. The machine is specially equipped with an integrated stainless steel water shaking and strip blowing machine, which thoroughly removes attached moisture on the surface of plastic strips through dual processes of shaking separation and high-pressure air blowing. It fundamentally solves the problems of moisture adhesion, mildew and agglomeration of PP pellets. The dryness of finished products fully meets the market standards for warehousing and sales, with no additional sun drying required.

Q3: Is the operation difficult for beginners? Is daily operation and maintenance cumbersome?

A: The equipment is equipped with a national standard intelligent frequency conversion electric control system, realizing linkage start and stop, automatic constant temperature and frequency conversion speed regulation of main and auxiliary machines. The operation interface is simple and intuitive, and workers can be proficient in 1-2 days. The core accessories are wear-resistant and durable with extremely low failure rate. Daily maintenance only includes cleaning screen mesh and water tank dirt, checking hydraulic station oil pressure and regularly refilling reducer lubricating oil, featuring simple maintenance and low cost.

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