In the precision arena of modern manufacturing, injection molded parts play an irreplaceable role with their quick molding, cost-effective and widely used characteristics. However, just as the brightest stars occasionally encounter mistakes, injection molded parts after processing the phenomenon of cracking, is undoubtedly a major challenge in the manufacturing process. Today, let us unravel the mystery behind this phenomenon and explore those little-known reasons.

First of all, we must realize that the cracking of parts does not happen overnight, it is the result of a combination of factors. Like a writer to conceptualize a story, we need to consider every detail, every turning point of the plot.

Temperature is the first threshold for injection molded parts to crack. Imagine a plastic material that melts at high temperatures, is injected into a mold, and then rapidly cooled and molded. This process, if the temperature is not properly controlled, the internal and external cooling rate is not consistent, it will lead to the generation of internal stress. Like the ice on the surface of a lake in winter, the surface appears to be hard, but there are cracks hidden inside. These stresses, once they exceed the material's tolerance limit, are released in the form of cracks.

Immediately following this, we have to consider the choice of material. Different plastic materials, like different characters, have their own characteristics and limitations. Some materials are sensitive to temperature changes, while others are less resistant to impact. Choosing the right material is like picking the right protagonist for a story; the key is to understand their nature.

Mold design is also the key to success or failure. An excellent mold is like a well-conceived blueprint that determines the shape and quality of the final product. An ill-designed mold, such as an uneven cooling system or improperly designed mold cavities and cores, can lead to unwanted stresses on the injected part during the cooling process, which can trigger cracking.

In addition, the setting of injection parameters is also crucial. Injection speed, pressure, holding time, etc., are important factors affecting the quality of injection molded parts. If the parameters are not set properly, it's like a mistake in a carefully choreographed drama, where the characters are not developed as they should be, ultimately leading to the failure of the whole story.

Finally, we have to mention the environmental factors. Humidity, temperature, and even dust in the air may have an impact on the quality of injection molded parts. These subtle external conditions, like the terroir in the background of the story, are inconspicuous, but can subtly change everything.

In summary, the causes of cracking after injection molded parts processing are like a complex multi-role drama in which each factor plays an important role. Only with a deep understanding of these factors can you avoid cracking during the manufacturing process and create flawless injection molded products.

In a manufacturing world full of variables, every crack is a cognitive challenge and a test of our problem-solving skills. Let's treat each injection molded part as we would treat a brilliant work of literature, carve it with care, and strive for excellence until we reach the realm of perfection.