Fully Automatic 180-type EPS Pelletizing Machine – Special Foam Recycling Equipment for Hot-melt Blocks and Cold-pressed Blocks

Aiming at the industry rigid demand for the recycling and processing of waste EPS foam hot-melt blocks and cold-pressed blocks, the 180-type EPS pelletizing machine has become the core mass-production equipment for medium-sized foam recycling factories, featuring core advantages of two-stage extrusion structure, high-grade wear-resistant accessories, constant-temperature energy-saving heating, and hydraulic non-stop screen changing. Ordinary foam pelletizing machines on the market generally suffer from uneven plasticization, strip breakage during screen replacement, easy screw wear, unstable production capacity and poor pellet appearance, which seriously affect production efficiency and finished product selling prices.

Our newly upgraded 180-type EPS pelletizing machine is fully equipped with industrial-grade reinforced configurations, specially adapted to the material characteristics of EPS foam such as light weight, easy melting and impurity inclusion. It realizes a fully automatic closed-loop production process including forced feeding, two-stage extrusion, precision filtration, water cooling shaping, variable-frequency pelletizing and dust removal & material storage, perfectly fitting various waste foam recycling and pelletizing scenarios.

The complete set of 180-type EPS pelletizing machine boasts five core strengths: two-stage plasticization, non-stop screen changing, wear resistance & durability, energy-saving stable production and high-purity pellets. It is specially optimized for the dedicated production process of EPS hot-melt blocks and cold-pressed blocks. Different from ordinary single-stage foam pelletizing equipment, this machine adopts a linked design of 180-type main machine + 165-type auxiliary machine. Materials undergo sufficient melting and plasticization twice, completely solving common industry problems of incomplete foam plasticization, unplasticized material inclusion and loose pellets.

All core screws and barrels are strengthened by high-frequency quenching treatment, and the feeding port is added with wear-resistant alloy to resist wear caused by sediment and impurities in recycled foam materials for a long time, greatly extending the service life of the equipment. Equipped with electromagnetic + heating ring dual-group temperature control, hydraulic left-right non-stop screen changing and variable-frequency speed regulation system, it delivers strong production continuity, lower energy consumption and unified finished pellet appearance, making it a highly cost-effective mass-production model in the current foam recycling industry.

The equipment has strong versatility and can process various materials such as waste EPS foam, foam hot-melt blocks, foam cold-pressed blocks, fast food boxes, packaging foam and extruded board leftover materials. It produces high-quality PS recycled pellets, which are widely used in secondary processing fields such as plastic toys, stationery, electrical appliance shells and modified filling. It is suitable for production and commissioning of small and medium-sized foam recycling plants, environmental protection recycling enterprises and waste material processing plants.

1. Detailed Parameters, Accessory Functions and Core Values of Complete Equipment
2. 600×600 Forced Variable-frequency Feeder (15KW Motor)

Specially designed for lightweight foam materials, the large feeding caliber adapts to the feeding of large hot-melt blocks and cold-pressed blocks without material blockage or bridging. The 15KW high-power variable-frequency motor can accurately match the feeding amount according to the extrusion speed of the main machine, realizing uniform forced feeding. It thoroughly avoids unstable feeding speed, empty feeding and material breakage problems, maintains continuous and stable extrusion pressure of the main machine, achieves more uniform plasticization of EPS materials, and effectively improves production stability and capacity.

2. 180-type Main Pelletizing Machine Assembly

Equipped with a 315-type hard-tooth low-noise reducer, it features large transmission torque, strong bearing capacity and silent operation, supporting 24-hour continuous heavy-load production without gear wear or breakage, adapting to high-frequency mass production working conditions of foam. The core 180×3000mm screw is made of 40CR material with high-frequency quenching treatment, featuring high hardness, sufficient toughness, wear resistance and carbon deposition resistance, specially suitable for lightweight molten EPS foam materials. The feeding port is added with a wear-resistant alloy layer to resist friction loss caused by impurities, greatly extending the service life of core accessories.

The matching 232×3000mm barrel adopts 45# steel high-frequency strengthening treatment, which is high-temperature resistant, high-pressure resistant, smooth in inner wall and non-sticky, eliminating material residue and scorching. Equipped with a 75KW 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 realizes fast temperature rise and high energy efficiency, while the dual heating rings perform zoned precise temperature compensation to ensure uniform overall temperature, completely solving the problems of local over-melting carbonization and low-temperature insufficient plasticization of foam.

3. 165-type Auxiliary Machine Assembly

Matched with a 225-type Changzhou-made hard-tooth low-noise reducer with stable transmission and low failure rate. It is equipped with a 165×1500mm 40CR high-frequency screw and a 219×1500mm 45# steel barrel, which carries out secondary refined plasticization and extrusion on materials initially melted by the main machine. It makes foam materials melt more thoroughly and texture denser, fundamentally improving the compactness and transparency of pellets.

It is fitted with a 350 large-diameter mesh left-right hydraulic non-stop screen changing head. The 4KW pump station motor provides stable hydraulic power, enabling screen replacement without shutdown or strip breakage, which greatly reduces shutdown losses and maximizes production continuity. Meanwhile, the large mesh screen provides sufficient filtering area to thoroughly intercept dust, impurities and scorched materials in foam materials and improve pellet purity. The 30KW special auxiliary machine motor operates stably in linkage with the main machine, 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 scale-free. The 4-meter extended water tank design realizes uniform and sufficient water cooling shaping of foam strips after two-stage extrusion, enabling soft foam strips to harden and shape quickly and straightly without adhesion or deformation. It provides high-quality blanks for subsequent precise pelletizing and avoids defective problems such as pellet adhesion, uneven length and high defective rate.

5. 180-type Matching Pelletizer (220-type Alloy Roller Cutter, 3KW Variable-frequency Motor)

The high-hardness alloy roller cutter is wear-resistant and impact-resistant, delivering flat cuts without burrs or debris, adapting to the cutting characteristics of soft foam strips. The 3KW variable-frequency speed-regulating motor can freely adjust the pelletizing speed and flexibly change pellet length according to the extrusion speed, producing finished pellets with uniform size and regular appearance, far superior to ordinary pelletizing equipment.

6. 1-ton Stainless Steel Storage Bin (3KW Fan Motor)

Adopting 201 stainless steel material, it is dust-proof, rust-proof, well-closed and easy to clean. The 3KW high-power fan continuously supplies air for dust removal and air-drying heat dissipation, which can effectively remove floating dust, water vapor and residual heat on the surface of finished pellets, preventing pellet moisture caking, dust accumulation and deterioration. It ensures dry and clean finished pellets, facilitating warehousing, packaging, transportation and sales.

7. National Standard Variable-frequency Distribution Box

Equipped with full set of high-quality national standard electrical components, it supports dual variable-frequency linkage speed regulation of main and auxiliary machines, with multiple safety protections including overload, short circuit and phase loss protection. It features regular circuit layout, stable operation and low failure rate. The whole machine supports one-click linkage start-stop with simple and safe operation, easy for novices to get started, suitable for long-term industrial continuous mass production.

1. Core Product Features
2. Two-stage Extrusion Plasticization Process: Primary refining by main machine + secondary refining by auxiliary machine realizes thorough melting of EPS foam, producing compact and transparent pellets without unplasticized materials or looseness, with greatly upgraded finished product quality.
3. Hydraulic Non-stop Screen Changing: Left-right alternating screen changing design requires no shutdown or strip breakage, ensuring strong production continuity, greatly improving the effective operating rate and minimizing capacity loss.
4. High-grade Wear-resistant Core Components: All main and auxiliary machine screws and barrels are strengthened by high-frequency quenching, and the feeding port is reinforced with wear-resistant alloy, realizing impurity resistance, wear resistance and carbon deposition resistance, suitable for the production of complex recycled foam materials.
5. Dual-mode Constant-temperature Heating: 80KW electromagnetic heating + dual-group heating ring zoned temperature control achieves fast temperature rise, uniform temperature control and power saving, eliminating foam scorching and poor plasticization defects.
6. Full Variable-frequency Intelligent Linkage: The whole process of feeding, extrusion and pelletizing adopts variable-frequency speed regulation with accurate ratio and stable operation. Single person can supervise mass production, with low labor cost and low production threshold.

III. Equipment Working Process

After pretreatment, EPS hot-melt blocks and cold-pressed blocks are uniformly sent to the main machine of the 180-type EPS pelletizing machine by the 600×600 variable-frequency forced feeder → constant-temperature melting and plasticization via electromagnetic + heating ring dual-group system → primary extrusion and conveying by main machine → secondary refined plasticization and filtration by 165-type auxiliary machine → non-stop screen changing and impurity removal by hydraulic machine head → uniform extrusion of foam strips → water cooling shaping in 4000mm extended stainless steel water tank → precise pelletizing by 180-type variable-frequency alloy pelletizer → fan dust removal and air drying → material storage and discharging via 1-ton stainless steel bin. The whole process is an automatic closed-loop operation with coherent procedures and stable production.

1. Application Fields

The EPS pelletizing machine is widely used in the waste EPS foam recycling industry. It can process various materials such as foam hot-melt blocks, cold-pressed blocks, waste packaging foam, fast food boxes and extruded board leftover materials, producing high-quality PS recycled pellets. The finished products are applicable to secondary processing scenarios including plastic stationery, toys, household appliance shells, plastic modification and filling injection molding, suitable for large-scale production of various small and medium-sized foam recycling processing plants and environmental protection recycling enterprises.

1. FAQ

180-type EPS pelletizing machineQ1: Is the  specially adapted for hot-melt blocks and cold-pressed blocks? How is its versatility?

A: The 180-type EPS pelletizing machine is optimally designed for the working conditions of EPS hot-melt blocks and cold-pressed blocks. The two-stage extrusion structure can perfectly adapt to the melting characteristics of compressed foam materials, solving the problems of uneven density of cold-pressed blocks and easy carbonization of hot-melt blocks. Meanwhile, the equipment has strong versatility and is compatible with the recycling and pelletizing of various waste foams and foam leftover materials, adapting to most foam recycling production scenarios.

Q2: What are the advantages of hydraulic non-stop screen changing? How much production cost can be saved?

A: Traditional foam pelletizing machines must shut down and disassemble for screen replacement, which not only delays production capacity, but also easily causes head carbon deposition and strip breakage waste. This machine is equipped with a 350 large-mesh left-right hydraulic screen changing system, realizing non-stop and non-breakage production throughout the process. The effective operating rate is increased by more than 15%, greatly reducing waste generation and shutdown losses, with remarkable energy-saving and cost-reducing effects in long-term mass production.

Q3: Is the equipment difficult to operate? Can novices start production independently?

A: The EPS pelletizing machine is equipped with a national standard variable-frequency intelligent electric control system, realizing linked start-stop of main and auxiliary machines, automatic constant temperature and variable-frequency speed regulation. The operation interface is simple and intuitive with easy logic. The manufacturer provides complete technical training and commissioning guidance. Novices can operate independently after simple training, and a single worker can complete the whole-line supervision and maintenance with an extremely low production threshold.

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