With the rapid development of construction machinery industry, construction machinery forging die plays an important role in the production process. Injection and filling performance of die is one of the important indexes to evaluate the quality and performance of die. This paper will analyze the performance of injection and filling of forging die of construction machinery.
Mold injection is the process of plastic material entering the mold cavity from the nozzle during the injection molding process. During the injection process, factors such as material fluidity, temperature control and cooling system design need to be considered. First of all, the performance of the mold injection directly affects the quality and appearance of the product. During the cavity filling process, it is necessary to ensure the uniform flow of plastic materials to avoid defects such as short filling and bubbles. In order to improve the injection performance of the mold, the following measures can be taken:
- Mold design optimization: reasonable design of mold cavity structure, avoid dead corners and sharp turns, reduce the flow resistance of plastic materials. At the same time, the nozzle, gate and cooling system are set reasonably to ensure the uniformity and stability of the material flow.
- Temperature control: Through the appropriate temperature control system and reasonable heating and cooling time, to ensure that the temperature of the mold and plastic materials in the appropriate range. Too high a temperature will lead to thermal decomposition and deterioration of the material, too low a temperature will affect the fluidity of the material.
- Material selection: Select the appropriate plastic material, considering its melt fluidity, solidification shrinkage and other characteristics. Different construction machinery forging needs may require different materials, should choose the appropriate material type and grade according to the actual situation.
Mold filling performance is the process of filling plastic material into the mold cavity. The performance of mold filling is directly related to the compactness and dimensional accuracy of the product. To improve the mold filling performance, you can start from the following aspects:
- Mold structure design: By optimizing the structure of the mold cavity to avoid the existence of dead corners and short filling areas, to ensure that the plastic material can fully fill the entire mold cavity.
- Runner design: Set the runner system of the mold reasonably, including nozzle, gate, main channel and secondary channel. The design of the runner should consider the material flow and filling speed to avoid short charge or excessive pressure loss.
- Mold temperature: properly control the temperature of the mold, and keep the mold in the appropriate temperature range during the injection molding process. Too high or too low temperature will affect the flow and filling properties of plastic materials.
- Injection molding machine parameter adjustment: according to the specific situation, adjust the injection molding machine injection speed, pressure and time and other parameters to ensure that the plastic material can be successfully filled to the mold cavity, and maintain a certain filling pressure.
In summary, the injection and filling performance of construction machinery forging die has an important impact on the quality and appearance of the product. By means of mold design optimization, temperature control, material selection and injection molding machine parameter adjustment, mold injection and filling performance can be improved to ensure product compactness and dimensional accuracy to meet customer needs.
