Inventory of injection molding innovation technolo

2022-09-19
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Inventory of innovative injection molding technology in the automotive field

the unique green performance of injection molding technology, such as precision, environmental protection, resource conservation, energy conservation and consumption reduction, and low-cost mass production, has become the first choice of green plastic innovative solutions for automotive structural parts molding processing technology and the basic technology of molding technology innovation, and has been extended from general equipment and general technology to special equipment and special technology for automotive structural parts molding

innovative technical concept of liquid metal injection molding

liquid metal is also known as amorphous alloy. It has low melting point, shrinkage close to zero, ultra rapid cooling solidification, and there is no time for atoms to arrange and crystallize orderly during solidification. Therefore, it has many unique properties: excellent corrosion resistance, wear resistance, high strength, high ductility, high hardness, light weight and so on. In terms of design, liquid metal alloys can provide greater degrees of freedom than before. Based on the green plastic innovations such as the diversity, accuracy and life cycle of auto parts, liquid metal has a broad application space in the automotive field

liquid metal injection molding technology is an innovative expansion of injection molding technology. The parts injected from the model can often surpass the most accurate CNC technology, and can achieve near optical surface finish and high precision, which is the most important quality feature of liquid metal injection molding process. Compared with metal injection molding (MIM) and CNC processing, injection molding of liquid metal creates conditions for realizing manufacturing concepts such as "higher efficiency and higher integration of automation and process". Liquid metal is processed by injection molding, which requires only a short cycle, and its production cycle time is between min, which is significantly shorter than that of CNC. At the same time, the gate material can be recycled without waste accumulation

liquid metal injection molding technology has brought new opportunities for the green development of automobiles. Automobile engine timing system, fuel injection nozzle, interior and exterior parts, safety components, pumps, sensors, heavy-duty connectors and other parts less than 400g can be made of liquid metal injection molding parts, which can not only obtain parts with excellent performance, but also obtain good economic benefits, which is a good choice for automobile parts manufacturing. Using the high hardness reduction and high wear resistance of liquid metal to manufacture wear-resistant parts such as hydraulic cylinders, piston rings and fuel injectors in automobile engines can greatly improve the service life of automobiles

the injection molding process of liquid metal should not only be regarded as a replacement process, but as a molding process that can obtain unique properties through flexible design. Liquid metal is processed by injection molding to achieve one-step manufacturing of highly complex metal parts, and its accuracy and surface quality are far better than ordinary casting. Even complex three-dimensional shapes and very fine structures can be molded with excellent reproducibility and efficient material utilization, which makes the manufacturing of high-quality metal parts change dramatically

the technical barrier of liquid metal is very high, especially the problem of "bulk forming" has become the bottleneck restricting its large-scale application. Interior and exterior parts, automobile parts with a weight of more than 400 grams, etc. belong to bulk forming, which means that if you want to promote liquid metal in a large area, you must master the core technology of bulk forming. Secondly, at present, there are few manufacturers involved in liquid metals, and it is difficult to expand their production capacity rapidly. American liquid metal company has the most core, top-notch and most extensive intellectual property rights (128 patents) related to liquid metal material formula and key processing technology in the world. It is a standard setter in the global liquid metal industry. With three core technologies including bulk forming process, material composition and equipment manufacturing, Yi'an technology is the only enterprise in the world that has the ability to form large-scale bulk amorphous metals. After taking shares in the American liquid metal company and inputting the technical know-how of bulk forming to it, it will fundamentally solve its shortcomings with low-cost raw materials, molds, independently developed forming equipment and processing technology, It is expected to rapidly promote liquid metal products to the world

Engel is an important global supplier that can provide injection molding machines and integrated system solutions for the processing of liquid metal materials. Engel developed a new LiquidMetal liquid metal material injection molding machine based on the all electric machine series e-motion, an alternative technology for metal injection molding (MIM) and CNC processing. The main difference between LiquidMetal machine and ordinary injection molding machine used for plastic processing is the injection molding unit. Liquid metal alloys are in the form of fragments cut from round bars, which are automatically fed into the melting chamber and melted by induction heating under high vacuum conditions. Instead of using screw, the machine uses plunger to inject molten metal alloy into the temperature control mold. Rapid cooling in the absence of oxygen will form an amorphous structure, so that the material has excellent properties. It can manufacture directly usable components with extremely high surface quality in a short cycle time. The processing cycle is between minutes, which is significantly shorter than the time required for CNC processing. Another advantage is that there is no waste accumulation, because the runner residues can be recycled

innovative technology for automotive water assisted injection molding of carbon fiber reinforced composites

water assisted technology was developed by German maximatorgmbh, which provided BMW with a complete set of equipment for automotive water assisted injection molding of carbon fiber reinforced composites at its plant in Landshut, Germany, for the production of curved parts of CFRP roof structures. The complete set of equipment, including water treatment unit and pressure unit, is customized for BMW. Special water ejector has a variety of integrated single-chip valves, which generate more powerful water pressure than water assisted injection. The close distance between the valve and the pressure unit is the key to success. In the past, similar components used foam core, with carbon fiber braid outside, and finally impregnated by epoxy resin injection. The latest technology turns plastic into an integral part of people's life, and the hose replaces the foam core, which is kept in the compression mold during the carbon fiber weaving process, and water pressure is applied. Remove the residual water after the resin is cured. High temperature, pure softened water and specific metal alloys are used for high-temperature equipment to ensure that corrosion will not occur. Hot water minimizes the curing process and production cycle time, and large-scale production can be carried out. In the development process, equipment manufacturers, mold manufacturers and epoxy resin suppliers have worked closely together

through breakthroughs in cost, process and mode, BMW has ushered in a new era of mass application of carbon fiber in automobiles, setting a successful example for other automakers. The company plans to reduce the manufacturing cost of carbon fiber body to the same level as that of aluminum alloy by 2020. At that time, the greening of cars is expected to be greatly improved, mainly reflected in safety, lightweight, environmental protection, new energy, etc

domestic water assisted injection molding is mainly used for injection molding of all plastic parts, and the main purpose is to improve the quality of surface finish. We should pay close attention to the development of automotive water assisted injection molding carbon fiber reinforced composite molding technology, and the focus of equipment research and development is mold and water assisted system

injection compression back composite molding innovative technology

injection compression is conducive to reducing the internal stress of products and improving the life cycle of product geometric and dimensional accuracy. The back injection mold can increase the function of products and improve the environmental protection performance and cleanliness of products. The combination of the two molding technologies realizes the function and performance of "potential demand" driven by green plastic products innovation in the automotive field

injection compression back composite molding technology innovation drives environmental protection and safety automotive plastic windows. The main body of environment-friendly and safe plastic car windows is PC plastic, and the surface layer is PMMA film. PMMA film is formed by blow molding, because the blown film has subtle defects at the cooling line of the film bubble. When the film is impacted in the opposite direction (inside the car) and in a tension state, it is easy to break from here. This "directional defect" mechanism can make passengers break the window in case of an accident; The second generation SPD smartpmma can block more than 99% of ultraviolet rays, which can reduce the use of air conditioners and save energy. Injection compression molding enables the back injection of the underlying PMMA film under low pressure, which ensures the optical quality and integrity of the surface PMMA film and ensures that the inherent properties of the PMMA film remain unchanged. In the molding process, the cut PMMA film is first put into the mold cavity, and then PC material is used for back injection compression molding

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