The processing temperature of injection machines can indeed significantly affect the quality of the final molded parts. Processing temperature is a key parameter in the injection molding process, which directly affects the melting state, flowability, and physical and chemical properties of plastic materials after cooling.
Specifically, if the processing temperature is too low, the plastic may not be completely melted, resulting in an increase in the viscosity of the melt and a decrease in fluidity, which in turn can cause surface roughness, cold spots, missing materials, weld marks, and other defects in the injection molded parts. It may even fail to fill the mold cavity, forming an incomplete product. In addition, low temperature may also affect the orientation and crystallinity of plastic molecular chains, thereby affecting the mechanical properties and dimensional stability of the product.
On the contrary, if the processing temperature is too high, although it can improve the fluidity and filling ability of the plastic, it may also cause thermal degradation of the plastic material, producing gases and impurities. These gases and impurities may form defects such as bubbles and silver lines during the injection molding process, reducing the strength and appearance quality of the product. At the same time, high temperature may accelerate the wear of molds and shorten their service life.
Therefore, in order to obtain high-quality injection molded parts, it is necessary to set and adjust the processing temperature of the injection machine reasonably according to the type, performance, and structural characteristics of the plastic material and the mold. This includes multiple aspects such as barrel temperature, nozzle temperature, and mold temperature to ensure that plastic materials can maintain appropriate melting and flowability during the injection molding process, while avoiding adverse factors such as thermal degradation and mold wear.