Weldlines influence not only strength of injection products but also the appearance of the products. This paper studies the effects of processing parameters on the appearance of weldlines by Taguchi experimental design method. Weldlines are obtained by the right door of copy machine which is modeled with three gates. The pictures of molding products are taken by digital camera. The samples of products and weldlines are extracted by software photoshop. The hue values of the samples of products and weldlines are calculated by software matlab. The visibility of weldlines is defined with the difference of the hue values of products and weldlines. By analysis, it turns out melt temperature, injection velocity, and injection pressure are the main factors which influence the appearance of weldlines.
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Li, H., Guo, Z. & Li, D. Reducing the effects of weldlines on appearance of plastic products by Taguchi experimental method. Int J Adv Manuf Technol 32, 927–931 (2007). https://doi.org/10.1007/s00170-006-0411-z
- Taguchi experimental method