Normally the cavity part is in direct contact with appearance surface of plastic part. In trial and production, it directly reflects appearance of plastic part. The core part mainly forms non-appearance surface part of plastic part. Therefore, bone position of plastic part and ejection mechanism of mold are all designed in core part. Determination of appearance of plastic part is directly related to choice of cavity, which is also directly related to customer’s requirements for plastic part. Slider mechanism mainly solves undercut structure that cannot be directly demolded on the side, but in the slider blade two-color molding, slider not only needs to complete side undercut, but also design a blade inside slider to realize two-color molding through blade structure.
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