Advanced technology of injection moulds for automotive interior and exterior parts
There is no essential difference between automotive injection molds and other injection molds, but they also have many of their own characteristics. Since the added value of automotive injection molds is generally high, many advanced technologies (such as sequential valve hot runner control technology, internal split surface technology, low pressure injection molding technology, etc.) are preferred to be developed and applied in automotive injection molds.
1. Sequence valve hot runner control technology (SVG technology)
The sequential valve hot runner control technology (SVG technology) is a new type of controlled hot runner technology. The cylinder is controlled in sequence by the cylinder control, which solves the problem of appearance defects of the traditional multi-point synchronous feed product. It can effectively avoid the defects such as weld lines and air pockets in the interior and exterior parts of the car, reduce the flow length, reduce the molding pressure, and play a huge role in the interior and exterior trim parts of the car 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. The traditional parts that are manually coated and vacuum-adsorbed by the male mold are directly injected into the mold. The main principle of the low-pressure injection mold is: the plastic injection pressure is lower on the cloth. When the mold is opened, the cloth should be hung on the front mold hanging needle, then the mold is closed, the injection is made, and finally the piece is taken. The products produced by this technology have a special soft fabric on the surface, which is greatly improved in decoration, hand feeling and appearance. Therefore, low-pressure injection mold technology is widely used in medium and high-end cars, generally used in automotive map bag skeletons, automotive ABC columns and other parts.
3. Automotive bumper internal parting injection mold technology
In automotive injection molds, for automotive bumper products, advanced internal parting technology is often used in mold design. The advantage is that the parting clip line is hidden on the non-appearing surface of the bumper, and the appearance of the clip line is not seen after assembly on the car, and the appearance of the product is not affected. However, this technique should be more difficult and complicated in structure than the outer bumper typing, technology risk is higher, the cost of the mold and the mold price will be higher than many outside the parting bumper, but look beautiful in luxury car Widely used.