Expert analysis: Advanced lightweight technology and development trend of automobile interior and exterior injection mold

    With the coming of electric vehicle, driverless technology and new energy vehicle era, lightweight design of automobile will be the inevitable trend of automobile design, and it is plastics that can make lightweight design of automobile become reality. A large number of plastics used in the automotive industry will bring a new historical opportunity to the plastic industry and the automotive injection mold industry.
    Proportion of automobile injection mold in interior and exterior decoration
    Behind the rapid development of automobile industry is the development of automobile mold industry. Especially in recent years, the development of the world automobile mould industry is changing with each passing day, and the demand for automobile mould is also increasing. In a new car, you need about 500 injection molds. In the developed countries of automobile industry, the market share of automobile products has exceeded 60%, and this trend continues to rise. It can be said that injection mold accounts for a large proportion in automobile mold, and its importance is self-evident.
    Lightweight, parts, lightweight, materials
    Advanced technology of injection mold for automobile interior and exterior decoration
    There is no essential difference between automobile injection mold and other injection mold, but it also has its own many characteristics. As the added value of automobile injection mold is generally high, many advanced technologies (such as sequence valve hot runner control technology, inner parting surface technology, low pressure injection technology, etc.) are given priority in the development and application of automobile injection mold.
    1. Sequence valve hot runner control technology (SVG Technology)
    Sequence valve hot runner control technology (SVG Technology) is a new type of stage control hot runner technology. It solves the problem of appearance defects of traditional multi-point synchronous rubber feeding products by oil cylinder control. It can effectively avoid weld marks, cavitation and other defects of automotive interior and exterior trim parts, reduce flow length and molding pressure, and play a huge role in automotive interior and exterior trim parts with strict appearance requirements.
    2. Low pressure double layer injection mold technology
    The so-called low-pressure double-layer injection mold, also referred to as low-pressure injection mold, is a new type of injection mold technology, which directly injects the traditional parts that rely on manual coating and vacuum adsorption of female and male mold in the mold at one time. The main principle of low-pressure injection mold is: the injection pressure is low, and the plastic flows on the cloth. When opening the mold, the cloth should be hung on the hanging needle of the front mold, and then the mold is closed, injected, and then the parts are taken out. The product produced by this technology has a special layer of soft cloth on the surface, which greatly improves the decoration, handle and aesthetics. Therefore, low pressure injection mold technology is widely used in high-end cars, generally used in car map bag skeleton, car ABC column and other parts.
    The main principle of low-pressure injection mold is that the injection pressure is low and flows on the cloth. When opening the mold, the cloth should be hung on the front mold pin, and then the mold should be closed, injected and taken out.
    3. Automobile bumper inner parting injection mold technology
    In the automotive injection mold, for automotive bumper products, the advanced inner parting surface technology is usually used in the mold design. Its advantage is that the parting clamp line is hidden on the non appearance surface of the bumper, and the appearance clamp line can not be seen after assembly on the car, which will not affect the appearance of the product. However, this technology is more complex in difficulty and structure than the outer parting bumper, and has higher technical risk. The cost and price of the mold will be much higher than that of the outer parting bumper. However, due to its beautiful appearance, it is widely used in high-end cars.

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