Study on thickness distribution of thermoformed medical PVC blister

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Li, Yiping^1

School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai

201418, China^1

关键词: Design flexibility;    Mold surfaces;    Plastic forming process;    Thermoformed parts;    Thickness distributions;    Time efficiencies;    Vacuum forming;    Wall thickness distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012043/pdf
DOI  :  10.1088/1755-1315/81/1/012043

来源: IOP

【 摘 要 】

Vacuum forming has many advantages over other plastic forming processes due to its cost effectiveness, time efficiency, higher product precision, and more design flexibility. Nevertheless, when pressures greater than the atmospheric value are required to force the thermo-plastic into more intimate contact with the mold surface, pressure forming is a better choice. This paper studies the process of air-pressure thermoforming of plastic sheet, and focuses on medical blister PVC products. ANSYS POLYFLOW tool is used to simulate the process and analyze the wall thickness distribution of the blister. The influence of mold parameters on the wall thickness distribution of thermoformed part is thus obtained through simulation. Increasing radius between mold and side wall at the bottom of blister and draft prove to improve the wall thickness distribution.