A rotary waveless screen changer

Abstract

The invention belongs to the field of screen changers, and in particular refers to a rotary wave-free screen changer, which includes a screen changer shell, a filter cartridge, a filter screen, and a central shaft. Outside the shaft, the outer wall of the screen changer shell is provided with a feed port c, the inner wall of the screen changer shell is formed with a discharge trough, and the groove surface of the discharge chute is formed with a discharge port c, and the screen changer shell is connected with the discharge port The opposite end surface of the groove is formed with a net taking groove; the filter cartridge is formed with more than three filter grooves, the outer surface of the filter groove is installed with a filter net, and several filter holes are formed on the filter groove; the outer surface of the central shaft is formed with Feed trough, the position of the feed trough corresponds to the position of the discharge trough, the feed port d of the central axis flow channel is set in the middle of the feed trough, and the discharge port d of the central axis is set in the middle of the outer end of the central shaft; There is a driving mechanism on the shell of the net device; the invention has the advantages of simple structure, non-stop net changing, pre-filling and exhausting, no fluctuation, and high production efficiency.

Description

technical field [0001] The invention belongs to the field of screen changers, in particular to a novel rotary waveless screen changer. Background technique [0002] In the process of plastic extrusion, the plastic melt is plasticized and heated for a long time, and there will be decomposition residues in the melt, plus impurities in the raw materials. Once they enter the extruder head, they will cause flow channel Blockage, plastic products have defects, or even cannot be produced normally; in order to filter out impurities and make the pure melt enter the extrusion molding head smoothly, a filter is usually installed between the screw head and the extrusion molding head for Prevent impurities and foreign matter from entering the molding head; as the extrusion time continues, the debris on the filter gradually accumulates, causing the pressure of the head to increase and the flow rate to decrease, and when the pressure exceeds a certain level, the filter is broken. If the f...

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Problems solved by technology

[0002] In the process of plastic extrusion, the plastic melt is plasticized and heated for a long time, and there will be decomposition residues in the melt, plus impurities in the raw materials. Once they enter the extruder head, they will cause flow channel Blockage, plastic products have defects, or even cannot be produced normally; in order to filter out impurities and make the pure melt enter the extrusion molding head smoothly, a filter is usually installed between the screw head and the extrusion molding head for Prevent impurities and foreign matter from entering the molding head; as the extrusion time continues, the debris on the filter gradually accumulates, causing the pressure of the head to increase and the flow rate to decrease, and when the pressure exceeds a certain level, the filter is broken. If the filter screen fails, it is necessary to stop the machine to replace the filter screen; from dismantling the mold head, cleaning, replacing the filter screen, reheating, pulling the billet to normal production and extrusion, the whole process of the operation ranges from tens of minutes to several hours. , resulting in raw material loss, energy waste, and increased production costs

[0003] There are also some screen changers on the market that do not need to be shut down to change the screen, but they will cause relatively strong fluctuations during the screen change process. Due to the sudden change of the impact force, the melt becomes unstable and the discharge is uneven. Easy to break and other problems, and it is prone to accidental dangers, which will affect the life of the screen changer

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