Q
what is open stroke injection molding
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Open Stroke Injection Molding refers to a process variant within the plastic injection molding industry, where the movement or "stroke" of the molding machine's plunger is not entirely constrained or limited by the mold's cavities volume. In standard injection molding, the amount of plastic material injected is precisely controlled to fill specific mold cavities completely, leaving no space for excess material. However, in an open stroke technique, the stroke length of the injection plunger exceeds the volume requirement of the mold cavities. This can allow for a continuous flow or a slightly over-packed condition of the molten plastic, which can be beneficial in ensuring all parts of the mold are completely filled, improving product quality by reducing the likelihood of voids or incomplete sections. However, it requires careful control to prevent excessive material waste or damage to the mold from over-pressurization. This method is particularly useful in complex or high-precision molding operations where the exact volume of the cavity may be difficult to measure or variable.
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