Practical Case of Stable Production, Quality Improvement and Cost Reduction via Upgrading to 150-type Plastic Pelletizing Machine in Medium-sized Recycling Plants
Most medium and small-sized plastic recycling factories with 3–5 years of operation face development bottlenecks: old small pelletizing machines cannot keep up with order demands, ordinary pellet quality can only be sold at low prices, frequent equipment shutdown and maintenance lead to high labor and electricity costs, and factory profits continue to shrink. A medium-sized processing factory focusing on waste PP and PE plastic recycling in Linyi, Shandong, completed a comprehensive production line upgrade by launching the high-configured 150-type plastic pelletizing machine, realizing increased production capacity, upgraded quality, reduced energy consumption and lower operation and maintenance costs, becoming a benchmark factory for refined recycled pelletizing in the local area.
The customer mainly engages in recycling and pelletizing of waste greenhouse films, packaging films, woven bags and injection molding leftover materials with stable orders all year round. Before renovation, the factory used ordinary low-configured 125-type pelletizing equipment with prominent production pain points: ordinary carbon steel screws had poor wear resistance, easy to scratch and accumulate carbon when processing recycled materials with sediment and slight oil stains, requiring monthly disassembly, polishing and maintenance. Traditional heating rings had high energy consumption and uneven temperature control, causing frequent pellet defects such as black spots, bubbles and unplasticized materials, resulting in uneven finished quality and low selling prices. The thin machine frame jittered at high speed with unstable extrusion pressure and frequent strip breakage, leading to intermittent production. Without complete post-screening and dust removal equipment, pellets contained many impurities and dust, making it impossible to undertake high-end orders and resulting in long-term low-price competition.
To get rid of low-price involution, improve product competitiveness and expand production capacity, the customer finally selected our complete high-configured 150-type plastic pelletizing machine after comparing multiple models. Relying on the equipment’s advantages of wear resistance, energy saving, stability and refined post-processing, it completely replaced the old equipment with immediate improvement effects after commissioning.
In the core extrusion production link, the high-frequency heat-resistant and wear-resistant configuration of the 150-type plastic pelletizing machine completely solves the old problems of screw wear and carbon scorching. The 40CR high-frequency screw + 45# steel high-frequency barrel has high hardness and strong impurity friction resistance, maintaining stable and durable performance when processing daily mixed and dirty materials. The alloy wear-resistant layer at the feeding port effectively resists impurity wear, greatly extending the continuous operation time of the equipment. The effective operating rate increased from 80% to over 95%, significantly reducing maintenance frequency and saving a lot of accessory and labor maintenance costs. The thickened channel steel frame matched with the 250-type hard-tooth reducer ensures silent operation, stable machine body and sufficient extrusion pressure, realizing uniform material plasticization and completely eliminating strip breakage, jitter and uneven extrusion problems.
The electromagnetic energy-saving heating system greatly reduces the customer’s power consumption. The 60KW electromagnetic heating features fast temperature rise and precise and uniform temperature control, with significantly lower hourly power consumption than old equipment, bringing considerable cumulative energy-saving benefits in the long run. Meanwhile, the plasticization quality is fully upgraded, with transparent pellets free of black spots, bubbles and unplasticized materials, reaching the medium and high-end pellet standard and laying a solid foundation for product premium. The electric adjustable-speed head enables convenient screen replacement and thorough filtration, effectively intercepting residual impurities in raw materials and further improving pellet purity.
The complete set of refined post-processing equipment makes up for finished product defects. The extended stainless steel water tank realizes in-place cooling and shaping with straight and regular plastic strips; variable-frequency pelletizing produces uniform pellets without debris; the shaking and blowing machine + dual-motor vibrating screen realize dual dust removal, impurity removal and classification; the stainless steel storage bin completes air drying and storage. The finished pellets are clean, dry and uniform in specification, completely changing the previous problems of messy, dusty and impure pellets. The customer can stably produce high-quality recycled pellets, successfully docking with multiple high-end modification and injection purchasing orders, increasing the pellet selling price by 200–300 yuan per ton and greatly expanding profit margins.
The customer person in charge feedback: After upgrading to the 150-type plastic pelletizing machine, the biggest change of the factory is “stability”. There is no need to supervise equipment maintenance every day, the production rhythm is stable, the production capacity fully meets order demands, the pellet quality is unified and high-end, old customers have stable repeat purchases and new high-end orders keep increasing. The equipment investment can be recovered in a short term, and the factory will continue to expand the recycling and processing scale relying on this stable production line.
This case fully proves that for medium-sized recycling plants aiming to get rid of low-price involution and realize quality improvement and profit increase, the 150-type plastic pelletizing machine is the most cost-effective and stably implemented upgrade model, balancing production capacity, quality, energy consumption and maintenance costs, suitable for most general plastic recycling mass production scenarios.
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