Читать книгу Plastics Process Analysis, Instrumentation, and Control - Группа авторов - Страница 25

Micro-injection molding is an important method for the fabrication of a microneedle array. Here, the mold temperature is one of the important factors that affect the mold-filling quality of the polymer melt during the micro-injection molding. An infrared heating method has been adopted to raise the mold temperature rapidly for improving molding quality of microneedle array (31).

According to the simulation of the reflector type, which has an important effect on the efficiency of the infrared heating system, an infrared heating system with high efficiency was developed and used in the infrared-heating-assisted micro-injection molding system. A series of verification experiments were carried out to verify the feasibility and the heating effect of the developed system.

The experimental results showed that the developed infrared heating system can achieve high efficiency and uniform heating of the mold surface and the infrared-heating-assisted micro-injection molding process for fabricating a microneedle array can improve the mold-filling capability of the polymer melt and optimize the replication quality of the parts, such as filling height, uniformity, and shrinkage (31).