Injection molding machine empowers the road to lightweight of new energy vehicles

1. Injection molding opportunities and challenges under the wave of new energy
Under the wave of the global era of green energy and low-carbon travel, the new energy vehicle industry is booming, and the demand for lightweight has become one of its core demands.In order to improve mileage and optimize vehicle performance, high-strength and high-toughness plastic parts are gradually replacing traditional metal parts.This change poses a new challenge to the injection molding machine industry: how to quickly adjust the process parameters and realize the large-scale production of such high-performance plastic parts driven by the lightweight needs of new energy vehicles?
2. Strict requirements for plastic parts of new energy vehicles
At present, the requirements for plastic parts in the manufacture of new energy vehicles are almost demanding.On the one hand, the high-strength characteristics ensure that the components can still maintain structural integrity and ensure the safety of drivers when they withstand complex driving stresses, such as collision, vibration, and long-term torsion.For key parts such as automobile chassis guards and battery housings, the plastic materials used need to have excellent tensile and compressive strength, which is equivalent to or even surpasses some metal materials.On the other hand, the high toughness determines that the components will not easily break and become brittle under extreme operating conditions such as low temperature and high-speed impact, so as to adapt to the changeable driving environment.
3. Precise temperature control of injection molding process innovation
The parameters of the traditional injection molding process are obviously difficult to meet such stringent standards.Injection molding machine manufacturers must start a comprehensive process innovation.First of all, precise temperature regulation is the key.Different high-performance plastics have unique melting characteristics. Taking the common carbon fiber reinforced nylon as an example, its melting point is significantly higher than that of ordinary nylon, and the temperature uniformity requirements during the melting process are extremely high.The injection molding machine needs to be equipped with a high-precision temperature control system, which adopts partition heating and intelligent feedback adjustment technology to ensure that the temperature of the barrel from the feeding section to the nozzle is accurately controlled within a very small fluctuation range, so that the plastic is evenly heated and fully plasticized to avoid deterioration of material properties or molding defects due to local overheating.
4. Optimization of pressure parameters for injection molding process innovation
Secondly, the optimization of pressure parameters is important.In the injection stage, in view of the high viscosity characteristics of the high-strength plastic melt, the injection pressure needs to be appropriately increased to ensure that the plastic melt can quickly and evenly fill all corners of the mold cavity to prevent short shots, under-injection and other problems.In the holding stage, according to the difference in wall thickness of different parts of the parts, in the holding stage, according to the difference in wall thickness of different parts of the parts, the holding pressure and time are dynamically adjusted to ensure uniform product density, eliminate shrinkage marks, pores and other defects, and improve the overall strength of the parts.
5. Fine adjustment of the screw in the innovation of injection molding technology
Moreover, the fine adjustment of screw speed and stroke is indispensable.A reasonable screw speed can not only ensure the plasticization efficiency of the plastic, but also avoid the fracture of the molecular chain of the material due to the excessive shear rate, which affects the toughness.Through the precise setting of the screw stroke, the amount of each injection can be accurately controlled, and the flow channel design of the mold can be matched to achieve a smooth and orderly flow of melt in the cavity, and the molding quality can be further optimized.
6. Intelligence helps rapid process adjustment
In order to achieve rapid adjustment of process parameters to meet large-scale production, the embedding of intelligent technology has become an inevitable trend.The injection molding machine is equipped with an advanced Industrial Internet of Things (IIoT) module to collect temperature, pressure, flow and other data in the production process in real time and upload it to the cloud platform.With the help of big data analysis and artificial intelligence algorithms, the system can automatically learn the best combination of process parameters for different products and different batches of plastics, and dynamically adjust in real time during the production process.In the event of process fluctuations or early warning of product defects, the system can quickly issue instructions and correct parameters to ensure the continuity and stability of production.
7. Collaborative optimization of molds and injection molding machines
In addition, as the “other half” of injection molding, the mold is essential for the collaborative optimization of the process parameters of the injection molding machine.For high-strength and high-toughness plastic parts, the mold needs to use high-thermal conductivity materials and optimize the design of the cooling water channel to ensure that the product can be cooled quickly and evenly after formation, reduce internal stress and improve component performance.At the same time, the opening and closing action of the mold should be precisely matched with the injection and holding cycle of the injection molding machine to shorten the molding cycle and improve production efficiency.
Eight, the new journey of the era of the injection molding machine industry
In the journey of lightweight new energy vehicles, the injection molding machine industry is standing at the crossroads of technological innovation.Through in-depth optimization of process parameters, intelligent upgrading, and collaborative innovation with molds, injection molding machines are expected to break through traditional limitations and produce high-strength and high-toughness plastic parts that meet stringent requirements for new energy vehicles on a large scale, helping to accelerate the realization of the dream of green travel and opening a new era of automobile manufacturing.