Plastic Granulator — Functions: With a specially designed screw and various configuration options, this machine is suitable for producing recycled and color‑blended granules from a wide range of plastics, including PP, PE, PS, ABS, PA, PVC, PC, POM, EVA, LCP, PET, PMMA, and more. The gearbox features a high‑torque design, ensuring quiet operation and smooth performance. The screw and barrel undergo special hardening treatments, providing excellent wear resistance, superior mixing capabilities, and high production output. A vacuum vent or standard exhaust port allows moisture and off‑gases to be removed during processing, resulting in more stable discharge, stronger pellets, and consistently high product quality. Plastic Granulator — Production Principle: By employing high‑temperature melting, plasticization, and extrusion, the machine alters the physical properties of plastics, achieving both plasticization and shaping. Plastic Granulator — Applications: This granulator is primarily used to process waste plastic films (such as industrial packaging film, agricultural mulch film, greenhouse film, beer wraps, shopping bags, etc.), woven bags, agricultural convenience bags, basins, buckets, beverage bottles, furniture, and everyday household items. It handles most common types of waste plastics, making it the most widely used, versatile, and popular piece of equipment in the plastic recycling industry. Technical Features: - The screw’s geometry has been redesigned, with increased thread pitch between flights, enabling thorough plasticization and melting within the barrel during heating. - A variable‑diameter design has been adopted, extending the screw’s service life. - High‑strength 38CrMoAlA alloy steel is utilized throughout the machine, enhancing overall performance. Barrel: The barrel is crafted from 45# steel, precision‑machined, and then quenched to achieve high hardness and excellent wear and corrosion resistance. Additionally, strategically placed slots at the feed end facilitate smooth material feeding. Heating System: The heating system consists of heating bands evenly distributed around the exterior of the barrel, providing uniform heating and plasticization of the material inside. Temperature adjustments are automatically regulated via instruments on the control panel. Cooling Fan: To maintain stable internal temperatures, a cooling fan is installed at the base of the barrel. This fan activates automatically when temperatures rise, further stabilizing the barrel’s thermal environment. Die Head: To prevent reduced flowability caused by temperature drops during extrusion, a dedicated heating band is mounted on the die head, ensuring consistent, full‑flow extrusion. The die head features a parallel 15‑hole configuration, increasing output and accelerating production speed. Its parallel extrusion design ensures seamless integration with the barrel, saving time and effort when changing screen plates. Granulation System: After passing through the cooling system, the extruded material enters the granulator, where it is rolled into pellet form for convenient packaging. Equipped with a motor‑driven feed roller, the granulator automatically conveys material into the chamber, while internal rotary blades cut it into uniform pellets.

Applications Granulators are widely used in industries such as chemicals, petrochemicals, pharmaceuticals, food processing, building materials, metallurgy, environmental protection, textile dyeing, ceramics, rubber, and plastics. They are molding machines capable of shaping materials into specific forms. Based on their structure and operating principles, granulators can be classified into different types. Energy efficiency in granulators can be divided into two main aspects: the power system and the heating system. The power required by a granulator is directly proportional to the extrusion rate and exponentially related to the screen size. In cold‑cut granulation systems, solidified polymer pellets are cut at the end of the processing stage; whereas in hot‑cut granulation systems, pellets are cut immediately as the molten polymer exits the die, with subsequent cooling performed downstream. Basic Information The main component of a plastic granulator is the extruder, which consists of an extrusion system, a transmission system, and a heating–cooling system. Vigorously developing renewable resources helps turn waste into valuable resources. 1. Extrusion System The extrusion system comprises a hopper and a die head. Plastics are plasticized into a uniform melt within this system and continuously extruded through the die head under pressure generated during the process. (1) Screw: This is the most critical part of the extruder, directly influencing its application scope and production capacity. It is made from high‑strength, corrosion‑resistant alloy steel. (2) Barrel: A metallic cylindrical component typically constructed from heat‑resistant, high‑pressure‑resistant, wear‑resistant, and corrosion‑resistant alloy steel, or from composite steel pipes lined with alloy steel. The barrel works in conjunction with the screw to crush, soften, melt, plasticize, degas, and compact the plastic material, while continuously and uniformly feeding the molten mass into the forming system. Generally, the barrel length is 15–30 times its diameter, ensuring thorough heating and complete plasticization of the material. (3) Hopper: Equipped with a shut-off device at the bottom for adjusting and interrupting the material flow, the hopper also features sight glasses and calibrated measuring devices on its sides. (4) Die Head and Mold: The die head consists of an inner sleeve made of alloy steel and an outer jacket of carbon steel, housing the forming mold. Its function is to convert the rotational motion of the molten plastic into a steady, parallel linear motion, smoothly guiding it into the die, while applying the necessary forming pressure. After being plasticized and compacted inside the barrel, the plastic passes through a porous filter plate along designated channels, flows through the die neck, and enters the forming mold. Proper coordination between the core and the die sleeve creates an annular gap that gradually narrows, forming a continuous, tightly packed tubular coating around the core. To ensure proper flow within the die head and eliminate dead zones where plastic might accumulate,分流套筒 (diverting sleeves) are often installed. Additionally, pressure‑equalizing rings may be added to minimize pressure fluctuations during extrusion. The die head is also fitted with mechanisms for mold alignment and adjustment, facilitating precise centering of the core and die sleeve. 2. Transmission System The transmission system drives the screw, providing the torque and rotational speed required during the extrusion process. It typically includes an electric motor, a reducer, and bearings. 3. Heating and Cooling Systems Heating and cooling are essential prerequisites for successful plastic extrusion. (1) Electric heating is commonly employed in extruders as of 2013, encompassing resistance heating and induction heating. Heating elements are installed throughout the machine body, neck, and die head to raise the temperature of the plastic within the barrel to the desired operating range. (2) Cooling systems are designed to maintain the plastic within the specified temperature range required by the process. Specifically, they help dissipate excess heat generated by shear friction during screw rotation, preventing overheating that could lead to decomposition, scorching, or difficulties in achieving the desired shape. Cylinder cooling is generally categorized into water cooling and air cooling; smaller and medium‑size extruders usually favor air cooling, while larger units often use water cooling or a combination of both. Screw cooling primarily relies on central water cooling, aiming to enhance solid material transport rates, stabilize output, and improve product quality. Meanwhile, cooling at the hopper serves two purposes: first, to strengthen the conveyance of solid materials and prevent plastic particles from becoming sticky and blocking the feed opening due to rising temperatures; second, to ensure the smooth operation of the transmission components.

Vacuum Table Material Stainless Steel Table Dimensions 3000 mm × 8000 mm Movement Method Manual (up, down, left, right, forward, backward) Movement Range Less than 120 mm Water Nozzles Included 16 Air Nozzles Included 16 Forming Speed Synchronized with the extruded profile Vacuum Pump Power 2.2 kW Control Box Controls the vacuum pump start-up (low-voltage circuit) Power Supply Voltage 380 V, 50/60 Hz Applications The forming platform is designed and manufactured by Hebei Shuangda Rubber & Plastic Machinery Co., Ltd. It is specifically used in plastic product manufacturing to minimize bending and distortion, thereby improving the yield of qualified products. The platform ensures proper cooling and shaping of profiles, offering simple operation and stable performance. Working Principle Made of stainless steel, the forming platform features longitudinal, transverse, and height-adjustable supports, allowing easy alignment with the mold exit. This machine consists of an independent full-vacuum system combined with a spray section, delivering rapid cooling and excellent shaping results. Usage and Maintenance Before use, inspect the nozzles for blockages and thoroughly clean any foreign matter from the platform as well as the filter mesh inside the bypass-type filter. Apply lubricant to threaded components and bearings. Ensure that electrical components remain free from water splashes. In freezing weather, shut down the equipment and drain all water from the water tank, pumps, and vacuum pump to prevent freezing and potential damage to the pump and piping. Check the rails for foreign objects and verify that no personnel or unrelated items are present within the working area. After completing all preparatory steps, energize the machine for trial operation, adjusting speed and tension according to actual requirements.

Host Model Length-to-Diameter Ratio Motor Power (kW) Specifications (mm) Production Rate (m/h) SJ-90 25:1 15 25–80 1600 SJ-105 25:1 22 80–120 2100 Applications This production line is a specialized unit for manufacturing edge strips used in advertising lettering. Made from high-temperature-resistant, aging-proof, fade-free resin and reinforced with metal strips in the center, it offers rapid shaping, flexible bending, excellent softness, vibrant colors, and fast production. The resulting illuminated letters and lightbox signs exhibit strong three-dimensional effects, are easy to use, save time and labor, and are energy-efficient and environmentally friendly—making them widely applicable across the advertising industry. Our newly developed edge strip for advertising letters is an ideal product for today’s illuminated and vacuum-formed letter industries. It requires no additional equipment or tools; simply wrap it around the letter by hand. This product enables quick edge finishing of advertising letters, saving time and effort, while preventing shrinkage, deformation, and thermal expansion/contraction. It can be bent freely, is easy to apply, boasts vivid colors, and delivers rapid production—improving efficiency by more than tenfold compared to traditional methods. With a lifespan of up to 10 years without fading, it produces high-end, aesthetically pleasing illuminated vacuum-formed letters. Production Process The production process of this advertising letter edge strip line involves using a plastic extruder equipped with a dedicated die to coat plastic onto a specialized mold head, followed by a laminating machine that applies a glossy film to the finished product. The advertising letter edge strip production lines manufactured by Hebei Shuangda Rubber & Plastic Machinery Co., Ltd. have earned widespread acclaim among customers. The extrusion process for these edge strips features a high degree of automation and intelligence, significantly reducing labor and costs while benefiting from extensive production expertise. Key components include the plastic extruder’s specialized die, the laminating machine, steel belt reels, and the winding machine.