Dewatering screw extruder

Abstract

The present invention relates to a screw-type dewatering extruder that simultaneously applies a screw dewatering method and an extrusion method. A feeding zone, primary and secondary dewatering zones by compression, a tertiary dewatering zone by vacuum, and a high-pressure extrusion zone are integrally formed. A pellet forming unit is configured to be rotatable on the rear side of a cylinder. Therefore, the dewatering ability can be greatly increased, and a separate extruder is not required at the rear end, unlike the existing dewatering device, so equipment and costs for a downstream drying process can be significantly reduced. A material that has undergone the dewatering and extrusion processes can be produced quickly and easily into pellets of a cut size. In addition, when a lead screw is rotated in the forward direction, powder moves from the front to the rear direction of the cylinder, at this time, a reverse spiral blade serves to prevent the movement of the powder, and as a result, the dewatering effect of the powder can be further increased. In addition, by rapidly pelletizing the powder by spraying cooling air to the powder extruded through a die hole in a cooling air injection unit, mass production is possible. The screw-type dewatering extruder comprises a cylinder, a lead screw, a lead screw driving unit, and a pellet forming unit.

Description

technical field [0001] The present invention discloses a screw type dehydration extruder, more specifically, the screw type dehydration extruder is applicable to the screw dehydration method and the extrusion method at the same time, and the feeding area is configured integrally, based on the first stage of compression The dehydration zone and the second-stage dehydration zone, the third-stage dehydration zone based on vacuum, and the high-pressure extrusion zone are also equipped with a rotatable particle forming unit on the rear side of the cylinder, which can quickly process the powder after dehydration and extrusion. Particles of the appropriate size are produced in batches. Background technique [0002] In the polymer production process of thermoplastic resin, the pulverized product (resin material) of the waste recycling process of resin material or its plastic products usually contains a large amount of water, so a dehydration process to remove the contained water is ...

AI Technical Summary

Problems solved by technology

[0008] However, the existing dehydration device needs to be equipped with an extruder at the back end, which increases the equipment and cost of the back-end drying process, and cannot make the materials that have undergone the dehydration and extrusion process into granules

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