Polypropylene hollow resin particles and its extrusion mechanism and hollow expanded polypropylene beads

Abstract

The invention relates to polypropylene hollow resin particles, an extrusion mechanism thereof and hollow expanded polypropylene beads, and belongs to the technical field of extrusion mechanisms. The extrusion mechanism comprises a screw head, a screw rod, a dividing cone and a guiding column, wherein the screw head, the screw rod, the dividing cone and the guiding column are coaxially arranged; the screw head is provided with a plurality of discharge holes penetrating through the upper surface and the lower surface of the screw head, connecting lines between circle centers, on the upper surface of the screw head, of the plurality of discharge holes can form a polygon, and each internal angle of the polygon is equal to or greater than 90 degrees; the screw rod is a hollow rod, the top end of the screw rod is fixed to the lower surface of the screw head, an inner cavity of the screw rod communicates with the discharge holes, and the outer wall is provided with an external thread; and thedividing cone and the guiding column are respectively in an inverted cone shape and a right cone shape and are respectively fixed to the lower surface and the upper surface of the screw head. The extrusion mechanism not only can ensure the uniformity of extruded materials discharged from the discharge holes, but also can conveniently adjust the extrusion expansion ratio and prevent the dischargeholes from internally adhering and blocking middle holes, and the extruded resin particles can avoid the defects caused by insufficient filling after expanding.

Description

technical field [0001] The invention belongs to the technical field of extruding mechanisms, and in particular relates to a polypropylene hollow resin particle, an extruding mechanism thereof, and hollow expanded polypropylene beads. Background technique [0002] Expanded polypropylene (EPP, Expanded Polypropylene) is a high-performance high-crystalline polymer / gas composite material. With its unique and superior performance, it has become the fastest growing new environment-friendly anti-pressure buffer insulation material. Polypropylene foamed beads are made of polypropylene as the main raw material and made by physical foaming technology. They are mainly used for mold foaming into various shapes and sizes for use in different occasions. . Compared with commonly used foaming materials such as EPS and EPE, polypropylene foamed products made of polypropylene foamed beads and molded with polypropylene foamed beads have many excellent properties, so EPP is used in more and mo...

AI Technical Summary

Problems solved by technology

[0008] The invention provides a polypropylene hollow resin particle, its extrusion mechanism and hollow expanded polypropylene beads to solve the problems of uneven discharge, silk sticking in the existing extrusion mechanism and the inability to obtain the middle hole, as well as the existing cylinder The filling rate of shaped foamed particles is low, resulting in insufficient filling of foamed particles in the mold, resulting in technical problems of defects

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