Injection molding is a periodic process in which each moving part of the injection molding device and the clamping device is actuated once in a predetermined order for each article formed. Therefore, the time sequence of each forming step in the injection molding process, the clamping force, the injection pressure, and the temperature and pressure changes experienced by the material have periodic characteristics. The total time required for the injection machine to complete an article is typically referred to as the total cycle time. The injection molding cycle is divided into two parts, a forming time and an auxiliary operation time, according to the action in the forming process. The former refers to the time when the melt enters the mold, fills the cavity shape and cools the shape in the cavity, including the preparation of the mold, filling, compaction, pressure holding, backflow and sealing, and subsequent cooling. Segments, usually ranging from a few seconds to a few minutes. The length of the forming time depends on the size, shape, thickness of the plastic part, the structure of the mold, the type of the injection machine, the variety of the plastic, and the forming process conditions. The latter refers to all the time except the forming time in the total cycle time, mainly including the moving parts of the injection machine, such as mold opening, closing, ejector products, mounting inserts, coating release agents and taking out products. time.
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