Sweden-based SKF today announced the signing of a long-term contract with China National Heavy Duty Truck Group. The value of the contract is more than SEK 5.2 billion. Sinotruk Group has commissioned SKF to supply SKF's split- card wheel hub units , tapered roller bearings and seals for its new trucks.
SKF is the world's leading supplier of bearings, seals, electromechanical integration, service and lubrication systems. The downstream industry involves more than 40 industries such as automotive, metallurgy, mining and construction machinery. In 2010, the Group's global sales reached 61 billion. Swedish Krona.
Injection Machine Screw And Barrel
The Injection Machine Screw and Barrel are essential components of the injection molding machine. The screw, often referred to as the auger, is a rotating element that functions to transport, plasticize, and compress the material (typically plastic) before injecting it into the mold. The barrel, on the other hand, is a static tube that houses the screw and serves as the chamber where the Plastic Material is heated and melted before being propelled forward by the screw.
Advantages:
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Precision and Efficiency:
- The screw's design and rotation speed can be precisely controlled to achieve desired plasticization and mixing of the material. This ensures a consistent and uniform flow of molten plastic into the mold.
- The barrel's internal surface is usually polished to minimize friction and heat loss, thereby improving thermal efficiency and material flow.
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Material Versatility:
- Injection machine screws and barrels can be tailored to suit a wide range of plastic materials, from thermoplastics to thermosets. The screw geometry and compression ratio can be adjusted to optimize material flow and plasticity.
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Durability and Longevity:
- Materials like 38CrMoALA, commonly used in screw and barrel construction, offer excellent strength and wear resistance. Proper nitriding and tempering processes further enhance their hardness, durability, and corrosion resistance.
- Surface treatments like chromium-plating and nitriding also increase the lifespan of the screw and barrel by reducing wear and abrasion.
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Energy Efficiency:
- The optimized design of the screw and barrel helps minimize energy consumption and heat loss. This not only reduces production costs but also contributes to a greener and more sustainable manufacturing process.
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Maintenance Convenience:
- The modular design of modern injection machine screws and barrels allows for easy disassembly and reassembly for maintenance or replacement purposes. This reduces downtime and ensures continuous operation of the injection molding machine.
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Ningbo Outai Plastic Machinery Technology Co.,Ltd , https://www.outacmachine.com