|
In a study of cellular injection molding process uses polyvinylchloride PVC. Polymers modified with introducing blowing agents into them in the Laboratory of the Department of Technologies and Materiale of Technical University of Kosice. For technological reasons, blowing agent have the form of granules. In the experimental, the content of the blowing agent (0–2,0 % by mass) fed into the processed polymer were adopted as a variable factor.
In studies, presented in the article, the chemical blowing agents occurring in the granulated form with a diameter of 1.2 to 1.4 mm were used. The view of the technological line for cellular injection molding and injection mold cavity with the injection moldings are shown in figure 1. The results of the determination of selected properties of injection molded parts for various polymeric materials, obtained with different content of blowing agents, are shown in figures 4-7. Microscopic examination of cross-sectional structure of the moldings were obtained using the author's position image analysis of porous structure. Based on analysis of photographs taken (fig. 7, 8, 9) found that the coating containing 1.0% of blowing agents is clearly visible solid outer layer and uniform distribution of pores and their sizes are similar.
|
