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The template of the extruder consists of a template body with a discharge hole and a heat insulation layer, and is fixed to the die head with a threaded rod. Only when the discharge speed of each die hole is consistent can particles of uniform size be cut out. During use, there are many factors that affect the smooth flow of the template. When the template is severely blocked, it will affect the appearance of the particles, the service life of the cutter, and cause shutdown.
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With the rapid development of the economy, human awareness of environmental protection and product requirements have been continuously improved. TPE (Thermoplastic Elastomer) is a material with high elasticity, high strength, high resilience of rubber, and can be injection molded. It is non-toxic and environmentally friendly, has excellent colorability, weather resistance and temperature resistance, and has excellent processing performance. It can be recycled and coated and bonded with base materials such as PP, PC, PS, ABS, etc., or it can be molded alone. TPE has both the processing performance of thermoplastics and the physical properties of vulcanized rubber. It is an advantageous combination of the advantages of plastics and rubber. Providing customers with a TPE material formula with low price, high yield rate, and excellent performance has always been the core pursuit of TPE granulation manufacturers.
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Elastomer granulator production process and flow Using styrene block copolymers (SBS, SEBS, SEPS, SIS, etc.) as the basic material, supplemented with other polymers, fillers and processing aids Thermoplastic elastomer blends
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Process parameters that affect mixing in the kneader: 1: Filling coefficient and feeding materials 2: Mixing procedure and feeding sequence 3: Mixing temperature 4: Mixing time 5: Rotor speed
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According to whether the axis lines of the twin screws are parallel or not, they can be divided into two types of extruders: those with parallel axis lines and those with intersecting axis lines. The one with parallel axis lines is a parallel twin screw extruder, and the one with intersecting axis lines is a conical twin screw extruder.
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When the material moves forward along the screw, it experiences changes in temperature, pressure, viscosity, etc. This change is not the same throughout the entire length of the screw. According to the changing characteristics of the material, the screw can be divided into a feeding section, a compression section and a homoge0nization section.
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TPU has good processing properties such as injection, extrusion, calendering, blow molding, and molding. It is used in the three major shoemaking projects of soles, uppers, and fitting, and is favored by the majority of shoemakers. As can be seen from the picture below, TPU covers almost the entire range of shoe manufacturing processes.
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For a twin-screw extruder, the screw is mainly divided into a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section. Threaded components mainly include conveying, melting, shearing, material mixing, residence time control and other functions. The threaded elements of the twin-screw extruder are combined in a "building block" manner. In practice, they can be adjusted according to different production needs. Therefore, screw combination is the key to customizing the twin-screw extrusion process.
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The amount of color masterbatch added to the final resin is generally 2%-5%. If the color masterbatch is mixed and added correctly, the content of the carrier resin in the final mixture will account for 1%-3% or more. This makes it the most abundant additive in the additive family, so some details should be paid attention to when selecting the carrier resin. For example, users' requirements for color, color stability, environmental requirements, and the role of masterbatch in the final product, etc., make the formulation of masterbatch increasingly complex.
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White masterbatch seems strange to many people but is so familiar. Almost everyone has used it. It has bright and eye-catching color, high tinting strength, good dispersion, high concentration, good whiteness and strong hiding power. , with the characteristics of good migration resistance and heat resistance, it is widely used in injection molding, blow molding, wire drawing, casting, extrusion, film blowing, foaming, sheet, pipe, pelletizing, hollow, EVA, bottle blowing, Sheet materials, household appliances, toys, packaging materials, wires and cables, plastic bags, automobiles, building materials, sports and leisure products, packaging bags, packaging bottles and other plastic product industries.