Barrel Injection Molding
Zhejiang Zhongyang Screw Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of barrel injection molding in China. With abundant experience, we warmly welcome you to buy durable barrel injection molding from our factory. All customized products are with high quality and competitive price.
Product Introduction
The injection molding barrel is one of the core components of an injection molding machine. Working in conjunction with the screw, it jointly completes key processes such as conveying, melting, plasticizing, and pressure injection of plastic materials, serving as a crucial part in ensuring the quality of injection molding.
Core Functions
Cooperate with the screw for plastic processing: Work synergistically with the screw to heat, melt, mix, and plasticize the plastic raw materials entering the barrel. Meanwhile, rely on the propulsive force of the screw to inject the uniformly plasticized melt into the mold cavity at high pressure.
Ensure plasticization uniformity: The barrel wall is usually equipped with heating devices. Combined with the shear friction heat generated by the screw, the plastic raw materials are gradually transformed from a solid state to a uniform molten state, providing stable materials for subsequent injection molding.
Key Features and Design
Diverse material options: Common materials include high-quality alloy steels such as 38CrMoAlA (SACM645), 4Cr5MoSiV1 (SKD61, H13), and 42CrMo. Some high-end products adopt a bimetallic structure, with a special alloy layer precisely cast on the inner wall of the barrel through processes like centrifugal casting, significantly enhancing wear resistance, corrosion resistance, and high-temperature resistance.
Customizable specifications:
Diameter range: Covers 15-4500mm, suitable for injection molding machines with different mold clamping forces (250T-8800T) and shot weights (30G-33000G).
Length-diameter ratio (L/D): Ranges from 15 to 55, adjustable according to the characteristics of plastic raw materials and product requirements.
Surface roughness: Reaches Ra 0.4μm, and straightness is controlled within 0.015mm/m, ensuring precise cooperation with the screw and reducing material residue.
Enhanced processing technology: Through nitriding treatment (hardness HV850-1000, nitriding depth 0.5-0.8mm) or HVOF supersonic thermal spraying technology, the surface hardness and wear resistance of the barrel are further improved. For bimetallic barrels, advanced processes such as PTA plasma welding and centrifugal casting are adopted to ensure the firm combination of the alloy layer and the base material, extending the service life.
Application Scope
Widely used in injection molding processing of various plastics, including general-purpose plastics, engineering plastics, and special engineering plastics such as glass fiber-reinforced plastics, fluoroplastics, and PPO. It is suitable for industries such as automotive parts, electronic products, home appliances, and daily necessities, meeting the production needs of high-quality, high-efficiency, and high-precision injection molding products.
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