A pvc double-wall corrugated pipe production material dehumidification system cleaning device, dehumidification system and dehumidification method

Abstract

The invention relates to the technical field of dehumidification of PVC production materials and more particularly relates to a cleaning device for dehumidification of a PVC double-wall corrugated pipe production material and a dehumidification system and method. The cleaning device is connected to an exhaust port and a branch pipe of an extruder, and comprises: a box body and an input tube and anoutput tube at the top of the box body. The input tube is connected to the exhaust port of the extruder. The input tube is connected to the branch pipe. The cleaning device also comprises a cleaningport at the bottom of the box body, a cleaning port baffle located at the cleaning port and used for controlling opening and closing of the cleaning port, and a partition plate located in the box body, extending downwardly from the top in the box body and arranged between the input tube and the output tube.

Description

technical field [0001] The invention relates to the technical field of dehumidification of PVC production materials, and more specifically relates to a cleaning device, a dehumidification system and a dehumidification method for a PVC double-wall corrugated pipe production material dehumidification system. Background technique [0002] The production process of PVC double-wall corrugated pipe is that the material extruded by the extruder is divided into inner and outer layers through the mold, the inner layer is cooled and shaped by the water jacket, and the outer layer is shaped by the module (air blowing). The pipe and the module are combined into a cavity, and air is injected between the inner and outer layers to separate the wave crest (outer layer) from the inner layer, and then adhere to the cavity to cool and shape, and finally form a double-wall bellows with a specific structure. [0003] In the molding process, because the inner and outer layers are relatively thin,...

AI Technical Summary

Problems solved by technology

[0004] Most of the production materials used in PVC double-wall corrugated pipes are high-filling formulas. It is difficult to drain the water in the materials during the mixing process, and temporary storage is also prone to moisture.

In the traditional PVC production material dehumidification system, the vacuum degree inside the barrel can only be controlled at 0.04-0.06MPa, the moisture in the material is too high, and the melt strength of the material cannot meet the production requirements, resulting in problems such as dragging and perforation during the pipe forming process

Moreover, due to the high processing temperature of the material, the residence time in the mold is longer (about 10 to 40 minutes, the larger the specification, the longer the time), and the material with high moisture content is easier to stick to the mold and decompose, causing mold corrosion

[0005] In addition, the traditional PVC production material dehumidification system is easy to pump the powder that is not fully plasticized to the filter due to the fluctuation of the material mixing process

In a very short period of time, the filter screen will be completely blocked, causing the vacuum degree of the extruder exhaust port to drop sharply, the moisture content of the material will rise sharply, and a large amount of waste products will be generated.

Moreover, traditional structures are difficult and time-consuming to clean

Furthermore, during the period from cleaning the filter screen to returning to normal, the material basically cannot be formed into a tubular structure

It is necessary to manually clean up the debris scattered on the molding machine in time, otherwise it will cause damage to the molding equipment

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