There is no essential difference between automotive inj […]
There is no essential difference between automotive injection molds and other injection molds, but they also have many of their own characteristics. Because the added value of automotive injection molds is generally high, many advanced technologies (such as sequence valve hot runner control technology, internal parting surface technology, low pressure injection technology, etc.) are preferentially developed and applied in automotive injection molds.
1. Sequence valve hot runner control technology (SVG technology)
Sequential valve hot runner control technology (SVG technology) is a new type of controlled hot runner technology. It adopts oil cylinder control to feed glue in sequence, which solves the problem of appearance defects of traditional multi-point synchronous glue feeding products. It can effectively avoid defects such as welding marks and air cavities in automotive interior and exterior trim parts, reduce flow length, and reduce molding pressure. It plays 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. The traditional parts that rely on manual coating and the vacuum suction of the female mold and the male mold are directly injected into the mold at one time. The main principle of the low-pressure injection mold is that the plastic with low injection pressure flows on the cloth. When the mold is opened, the cloth must be hung on the hanging pin of the front mold, and then the mold is closed, injected, and the part is finally taken. The products produced by this technology, because of a special layer of soft fabric on the surface, whether it is decorative, hand, and aesthetics are greatly improved. Therefore, the low-pressure injection mold technology is widely used in high-end cars, generally used in car map pocket skeletons, car ABC columns and other parts.
3. The technology of injection mold in the car bumper
In automotive injection molds, for automotive bumper products, advanced internal parting surface technology is usually used in mold design. The advantage is that the parting line is hidden on the non-appearance surface of the bumper, and the appearance line is not visible after assembly on the car, which will not affect the appearance of the product. However, this technology is more difficult and structurally more complicated than the external split bumper, and the technical risk is also higher. The mold cost and mold price will also be much higher than the external split bumper. However, because of its beautiful appearance, it is used in medium and high-end cars. Is widely used.