In the manufacturing process of plastic toys, bubble issues are a common challenge. Bubbles not only affect the appearance and quality of the products but may also lead to functional issues. Therefore, adopting appropriate bubble handling techniques is crucial.

Firstly, we can reduce the occurrence of bubble issues by adjusting the formulation of plastic materials. Selecting suitable plastic materials and adding appropriate amounts of anti-foaming agents and defoamers can effectively reduce bubble formation. Additionally, optimizing the melting temperature and melting speed of plastics can also help decrease bubble formation.

Secondly, employing vacuum defoaming technology can effectively remove bubbles from plastic products. Vacuum defoaming machines create a negative pressure environment in a sealed defoaming chamber, extracting bubbles from plastic products. Vacuum defoaming technology is widely used in the manufacturing of plastic toys and can significantly improve product quality and appearance.

Moreover, reasonable mold design and processing techniques also play an important role in reducing bubble issues. Mold design should consider the smoothness and uniformity of plastic flow, avoiding overly complex structures and sharp corners to minimize bubble formation. Additionally, using appropriate injection molding parameters such as injection speed and holding pressure time can also reduce bubble formation.

Finally, for plastic toys with special shapes and structures, post-processing techniques can be employed to address bubble issues. For example, methods like heat treatment, hot pressing, and hot flow leveling can melt and remove bubbles from plastic materials, thereby improving product quality.

In conclusion, bubble issues in the manufacturing of plastic toys can be addressed through techniques such as adjusting plastic material formulations, employing vacuum defoaming technology, optimizing mold design and processing techniques, and utilizing post-processing techniques. By adopting appropriate bubble handling techniques, we can produce plastic toy products of higher quality and better appearance.