High-light mold temperature machine successfully developed to fill such domestic technology gap
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In high-gloss injection molding, success largely depends on three key factors: the mold design, the material used, and the precision of the mold temperature control system—commonly known as the mold temperature machine. Aode Machinery Co., Ltd. has developed a high-gloss injection mold temperature machine with strong R&D capabilities, effectively filling a critical technical gap in the domestic market.
In traditional injection molding, setting the mold temperature too low can reduce the cycle time, but it often leads to sink marks, which negatively affect the product's appearance. On the other hand, increasing the mold temperature improves surface quality, but may result in warping, sagging, dimensional instability, and longer cycle times, ultimately increasing production costs.
High-gloss steam injection molding technology offers a balanced solution to these challenges. It utilizes steam and cooling water generated by a steam generator to precisely control the mold temperature throughout the entire molding cycle, combining the benefits of both high and low-temperature processes.
The process begins by injecting steam into the mold before the resin is injected, raising the mold temperature above the thermal deformation point of the resin. This ensures that the molten plastic flows smoothly and fills the cavity without surface defects. Once the injection is complete, cooling water is introduced to rapidly lower the mold temperature below the resin’s thermal deformation threshold. This not only accelerates the curing process, shortening the cycle time, but also prevents issues like warping and sagging.
Thanks to this advanced technique, high-gloss steam injection eliminates surface melting, weld lines, waviness, and silver streaks. It completely addresses surface shrinkage in plastic parts, achieving a mirror-like finish. As a result, no post-processing such as painting is needed, significantly reducing costs and delivery time. Additionally, this method effectively mitigates the floating effect commonly seen in fiber-reinforced products, making it ideal for high-quality, high-performance applications.