The second is to make the mold open and close cyclically. In the ejection mechanism, the guide parts ensure the directional movement of the push rod, especially the slender rod, to avoid the pushrod from breaking, deforming, or being worn out during the ejection process. When the movable mold and the fixed mold or the upper mold and the lower mold are closed, the guide parts are first introduced to guide the movable and fixed molds or the upper and lower molds to be accurately closed to avoid the core entering the cavity first, which may cause the core or the cavity Damage. Not only can improve the yield and processing efficiency of the product, but also increase the service life of the equipment. In the process of moving the movable mold to the fixed mold, the higher the synchronization, the more stable the operation will be, and there will be no swing. The first is to fix the two mold halves and align them. In this extrusion blow molding process, the clamping device can play the following three functions: At the same time, the temperature of the upper and lower parts of the tube blank is relatively low due to the large difference in the residence time in the air. The billet often sags due to its own weight, and the upper part of the tube billet, near the die, the wall thickness is obviously reduced, and the wall thickness of the lower part is obviously increased. In actual production, for the molding of different types of products, especially when manufacturing large hollow products, if the direct extrusion blow molding technology is used, it often takes a long time to extrude the tube ring due to the limited extrusion capacity of the extruder. The blank is extruded continuously during blow molding, and the blow molding model is completing the blow molding process of a semi-finished liner.Īs we all know, the extrusion blow molding process is a process in which a parison is produced by extruding the extruder through the ring die of the head, and then the parison is moved into the blow mold to expand into a hollow product. The A extruder produces the middle layer, the B extruder produces the inner layer, and the C extruder produces the outer layer. Generally speaking, the extrusion blow molding process is through three-layer co-extrusion blow molding. Today, let’s talk about the role of the clamping device in the extrusion blow molding process.
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