Rolling Mold Guiding a New Revolution in Automotive Manufacturing
In recent years, the development and innovation of rotational molding molds have led to a new revolution in automotive manufacturing. The application of rotational molding molds has brought many advantages to the automotive manufacturing industry:
1、 The mold is easy to form, making it very convenient to process parts with complex shapes. For example, when processing instrument panels with steel plates, it is often necessary to first process and shape various parts, and then assemble or weld them separately with connecting pieces, which involves many processes. And using molds can form in one go, with short processing time and guaranteed accuracy.
Customization of rotational molding molds
2、 The major advantage of using molds for automotive materials is to reduce the weight of the vehicle body. Lightweight is the goal pursued by the automotive industry, and rotational molding molds can demonstrate their expertise in this area. The general specific gravity is 0.9~1.5, and the specific gravity of fiber reinforced composite materials will not exceed 2. Among metal materials, the specific gravity of A3 steel is 7.6, brass is 8.4, and aluminum is 2.7. This makes the mold an excellent material for lightweight cars.
3、 The elastic deformation characteristics can absorb a large amount of collision energy, have a significant buffering effect on strong impacts, and provide protection for vehicles and passengers. Therefore, modern cars use plasticized instrument panels and steering wheels to enhance cushioning. The front and rear bumpers, as well as the body decorative strips, are made of mold materials to reduce the impact of external objects on the body. In addition, the rotational molding mold also has the function of absorbing and attenuating vibration and noise, which can improve the comfort of riding.
4、 According to the organizational composition of the mold, different fillers, plasticizers, and hardeners can be added to produce the desired performance of the mold, changing the mechanical strength and processing performance of the material to meet the requirements of different components on the vehicle. For example, the bumper should have considerable mechanical strength, while the cushion and backrest should use soft polyurethane foam.
5、 It has strong corrosion resistance and will not corrode if damaged locally. Once the paint surface of steel is damaged or the early anti-corrosion is not done well, it is easy to rust and corrode. The corrosion resistance of rotational molding molds to acids, alkalis, salts, etc. is much greater than that of steel plates. If molds are used as body coverings, they are very suitable for use in areas with high pollution.
Overall, the development of rotational molding molds in the automotive application field has shifted from ordinary decorative parts to structural and functional parts; Materials are developing towards composite materials and mold alloys with higher strength, better impact resistance, and ultra-high flow.